agents/contracts/gasoracle/gasoracle.contractinfo.json
{"solidity/GasOracle.sol:AddressUpgradeable":{"code":"0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122082cc3fe05d6d829b9b1850465ee38a55394e90997555a0ae14baaaa8638ee12964736f6c63430008110033","runtime-code":"0x73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122082cc3fe05d6d829b9b1850465ee38a55394e90997555a0ae14baaaa8638ee12964736f6c63430008110033","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"56207:9180:0:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;56207:9180:0;;;;;;;;;;;;;;;;;","srcMapRuntime":"56207:9180:0:-:0;;;;;;;;","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"details":"Collection of functions related to the address type","kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Collection of functions related to the address type\",\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"AddressUpgradeable\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:ChainContext":{"code":"0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122079472b828d6f9bb906beb1405f5c076b1c052f90809ba86dbaf2cdfffe3c034264736f6c63430008110033","runtime-code":"0x73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122079472b828d6f9bb906beb1405f5c076b1c052f90809ba86dbaf2cdfffe3c034264736f6c63430008110033","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"69173:976:0:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;69173:976:0;;;;;;;;;;;;;;;;;","srcMapRuntime":"69173:976:0:-:0;;;;;;;;","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"notice":"Library for accessing chain context variables as tightly packed integers. Messaging contracts should rely on this library for accessing chain context variables instead of doing the casting themselves.","version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"notice\":\"Library for accessing chain context variables as tightly packed integers. Messaging contracts should rely on this library for accessing chain context variables instead of doing the casting themselves.\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"ChainContext\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:ContextUpgradeable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"}],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"details":"Provides information about the current execution context, including the sender of the transaction and its data. While these are generally available via msg.sender and msg.data, they should not be accessed in such a direct manner, since when dealing with meta-transactions the account sending and paying for execution may not be the actual sender (as far as an application is concerned). This contract is only required for intermediate, library-like contracts.","kind":"dev","methods":{},"stateVariables":{"__gap":{"details":"This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain. See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps"}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"version\",\"type\":\"uint8\"}],\"name\":\"Initialized\",\"type\":\"event\"}],\"devdoc\":{\"details\":\"Provides information about the current execution context, including the sender of the transaction and its data. While these are generally available via msg.sender and msg.data, they should not be accessed in such a direct manner, since when dealing with meta-transactions the account sending and paying for execution may not be the actual sender (as far as an application is concerned). This contract is only required for intermediate, library-like contracts.\",\"kind\":\"dev\",\"methods\":{},\"stateVariables\":{\"__gap\":{\"details\":\"This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain. See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"ContextUpgradeable\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:GasDataLib":{"code":"0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220f120a4b4429673b2270f2ad5e09f9886be1a6b067bf599f8ed0d43fadc8fc68764736f6c63430008110033","runtime-code":"0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220f120a4b4429673b2270f2ad5e09f9886be1a6b067bf599f8ed0d43fadc8fc68764736f6c63430008110033","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"72579:7222:0:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;72579:7222:0;;;;;;;;;;;;;;;;;","srcMapRuntime":"72579:7222:0:-:0;;;;;;;;","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"notice":"Library for encoding and decoding GasData and ChainGas structs. # GasData `GasData` is a struct to store the \"basic information about gas prices\", that could be later used to approximate the cost of a message execution, and thus derive the minimal tip values for sending a message to the chain. \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the \u003e approximates instead of the exact values, and thus save on storage costs. \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an \u003e 0.4% error on the approximates would be acceptable. `GasData` is supposed to be included in the Origin's state, which are synced across chains using Agent-signed snapshots and attestations. ## GasData stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | Description | | ---------- | ------------ | ------ | ----- | --------------------------------------------------- | | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) | | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) | | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) | | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) | | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) | | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) | \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math. ## ChainGas stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | Description | | ---------- | ------- | ------ | ----- | ---------------- | | (016..004] | gasData | uint96 | 12 | Chain's gas data | | (004..000] | domain | uint32 | 4 | Chain's domain |","version":1},"developerDoc":{"kind":"dev","methods":{},"stateVariables":{"SHIFT_AMORT_ATT_COST":{"details":"Amount of bits to shift to amortAttCost field"},"SHIFT_DATA_PRICE":{"details":"Amount of bits to shift to dataPrice field"},"SHIFT_ETHER_PRICE":{"details":"Amount of bits to shift to etherPrice field"},"SHIFT_EXEC_BUFFER":{"details":"Amount of bits to shift to execBuffer field"},"SHIFT_GAS_DATA":{"details":"Amount of bits to shift to gasData field"},"SHIFT_GAS_PRICE":{"details":"Amount of bits to shift to gasPrice field"}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"stateVariables\":{\"SHIFT_AMORT_ATT_COST\":{\"details\":\"Amount of bits to shift to amortAttCost field\"},\"SHIFT_DATA_PRICE\":{\"details\":\"Amount of bits to shift to dataPrice field\"},\"SHIFT_ETHER_PRICE\":{\"details\":\"Amount of bits to shift to etherPrice field\"},\"SHIFT_EXEC_BUFFER\":{\"details\":\"Amount of bits to shift to execBuffer field\"},\"SHIFT_GAS_DATA\":{\"details\":\"Amount of bits to shift to gasData field\"},\"SHIFT_GAS_PRICE\":{\"details\":\"Amount of bits to shift to gasPrice field\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"notice\":\"Library for encoding and decoding GasData and ChainGas structs. # GasData `GasData` is a struct to store the \\\"basic information about gas prices\\\", that could be later used to approximate the cost of a message execution, and thus derive the minimal tip values for sending a message to the chain. \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the \u003e approximates instead of the exact values, and thus save on storage costs. \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an \u003e 0.4% error on the approximates would be acceptable. `GasData` is supposed to be included in the Origin's state, which are synced across chains using Agent-signed snapshots and attestations. ## GasData stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | Description | | ---------- | ------------ | ------ | ----- | --------------------------------------------------- | | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) | | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) | | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) | | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) | | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) | | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) | \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math. ## ChainGas stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | Description | | ---------- | ------- | ------ | ----- | ---------------- | | (016..004] | gasData | uint96 | 12 | Chain's gas data | | (004..000] | domain | uint32 | 4 | Chain's domain |\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"GasDataLib\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:GasOracle":{"code":"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","runtime-code":"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","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"111282:10193:0:-:0;;;112712:139;;;;;;;;;;;;;;;;;;;;;;;;;;;;:::i;:::-;109179:172;;;;;;;;;;;;;-1:-1:-1;;;109179:172:0;;;;68208:32;;112792:14;109179:172;68474:24;68488:8;68474:24;:::i;:::-;68466:32;;;;;;68162:343;109282:22:::1;:20;;;;;:22;;:::i;:::-;109268:36;::::0;;::::1;;::::0;109314:30:::1;;::::0;-1:-1:-1;;;;;;112818:26:0::1;;::::0;-1:-1:-1;111282:10193:0;;70049:98;70091:6;70116:24;:13;:22;;;;;:24;;:::i;:::-;70109:31;;70049:98;:::o;36170:187::-;36226:6;36261:16;36252:25;;;36244:76;;;;-1:-1:-1;;;36244:76:0;;978:2:1;36244:76:0;;;960:21:1;1017:2;997:18;;;990:30;1056:34;1036:18;;;1029:62;-1:-1:-1;;;1107:18:1;;;1100:36;1153:19;;36244:76:0;;;;;;;;-1:-1:-1;36344:5:0;36170:187::o;14:455:1:-;92:6;100;153:2;141:9;132:7;128:23;124:32;121:52;;;169:1;166;159:12;121:52;201:9;195:16;251:10;244:5;240:22;233:5;230:33;220:61;;277:1;274;267:12;220:61;350:2;335:18;;329:25;300:5;;-1:-1:-1;;;;;;385:33:1;;373:46;;363:74;;433:1;430;423:12;363:74;456:7;446:17;;;14:455;;;;;:::o;474:297::-;592:12;;639:4;628:16;;;622:23;;592:12;657:16;;654:111;;;751:1;747:6;737;731:4;727:17;724:1;720:25;716:38;709:5;705:50;696:59;;654:111;;474:297;;;:::o;776:402::-;111282:10193:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;","srcMapRuntime":"111282:10193:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;111772:72;;111835:9;111772:72;;;;;160:25:1;;;148:2;133:18;111772:72:0;;;;;;;;115305:129;115414:11;115405:21;;115350;115405;;;:8;:21;;;;;;;;115305:129;;68511:401;68682:28;;;;;;;;68695:7;68682:28;;68704:5;68682:28;;;;68511:401;;;;68682:28;68511:401;:::i;114539:721::-;;;;;;:::i;:::-;;:::i;:::-;;;;1552:25:1;;;1608:2;1593:18;;1586:34;;;;1636:18;;;1629:34;;;;1694:2;1679:18;;1672:34;1737:3;1722:19;;1715:35;1781:3;1766:19;;1759:35;1539:3;1524:19;114539:721:0;1265:535:1;65858:1352:0;;;;;;:::i;:::-;;:::i;:::-;;;;;;;:::i;111850:70::-;;111913:7;111850:70;;113169:782;;;;;;:::i;:::-;;:::i;:::-;;114009:226;;;;;;:::i;:::-;;:::i;109576:57::-;;;:::i;108694:37::-;;;;;;;;4514:10:1;4502:23;;;4484:42;;4472:2;4457:18;108694:37:0;4340:192:1;115479:2777:0;;;;;;:::i;:::-;;:::i;106720:212::-;;;:::i;112951:141::-;;;:::i;114280:214::-;;;;;;:::i;:::-;;:::i;108577:35::-;;;;;103051:85;103123:6;;;;103051:85;;;5038:42:1;5026:55;;;5008:74;;4996:2;4981:18;103051:85:0;4862:226:1;112384:27:0;;;;;;111661:36;;;;;105833:99;105912:13;;;;105833:99;;106125:178;;;;;;:::i;:::-;;:::i;114539:721::-;114857:16;;;114641;114857;;;:8;:16;;;;;;114641;;;;;;;;;;114857;;;;114894:40;;72701:6;75490:39;;;114894:20;:40::i;:::-;114883:51;-1:-1:-1;114956:41:0;72812:5;75807:40;;;;;114894:20;:40::i;114956:41::-;114944:53;-1:-1:-1;115020:42:0;72924:5;76134:41;;;;;114894:20;:40::i;115020:42::-;115007:55;-1:-1:-1;115087:44:0;73041:5;76463:44;;;;;114894:20;:40::i;115087:44::-;115072:59;-1:-1:-1;115154:42:0;73153:5;76808:41;;;;;114894:20;:40::i;115154:42::-;115141:55;-1:-1:-1;115215:38:0;115236:14;;;114894:20;:40::i;115215:38::-;115206:47;;114829:431;114539:721;;;;;;;:::o;65858:1352::-;65918:27;65974:5;;66010:20;;;;;;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;;;;;;;;;;;;66010:20:0;;;;;;;;;;;;;;;;65996:34;;66040:19;66074:9;66069:1135;66093:6;66089:1;:10;66069:1135;;;66124:5;;66130:1;66124:8;;;;;;;:::i;:::-;;;;;;;;;;;;:::i;:::-;66116:16;;66146:20;66169:11;66181:1;66169:14;;;;;;;;:::i;:::-;;;;;;;66146:37;;66526:4;66518:26;;66545:5;:14;;;;;;;;:::i;:::-;66518:42;;;;;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;66497:17:0;;;66480:80;;;;;;66833:19;;66830:38;66820:301;;66997:66;66991:4;66984:80;67098:4;67092;67085:18;66820:301;-1:-1:-1;67176:3:0;;66069:1135;;;;65947:1263;;65858:1352;;;;:::o;113169:782::-;102944:13;:11;:13::i;:::-;113410:22:::1;113435:368;113485:28;113504:8;113485:18;:28::i;:::-;113539:29;113558:9;113539:18;:29::i;:::-;113595:30;113614:10;113595:18;:30::i;:::-;113654:32;113673:12;113654:18;:32::i;:::-;113713:30;113732:10;113713:18;:30::i;:::-;113766:26;113785:6;113766:18;:26::i;:::-;74542:51:::0;72701:6;74542:51;;;;74608:53;72812:5;74608:53;;;;74542:119;74676:55;72924:5;74676:55;;;;74542:189;74746:60;73041:5;74746:60;;;;74542:264;74821:55;73153:5;74821:55;;;;74542:334;74891:30;;;74542:379;74163:775;;;;;;;;;113435:368:::1;113866:16;::::0;::::1;;::::0;;;:8:::1;:16;::::0;;;;;113410:393;;-1:-1:-1;113866:16:0::1;113817:66:::0;;::::1;113866:16:::0;::::1;113817:66;113813:132;;113899:35;113911:6;113919:14;113899:11;:35::i;:::-;113400:551;113169:782:::0;;;;;;;:::o;114009:226::-;102944:13;:11;:13::i;:::-;6761:10:::1;114087:13;:30;114083:61;;;114126:18;;;;;;;;;;;;;;114083:61;114154:12;:28:::0;;;114197:31:::1;::::0;160:25:1;;;114197:31:0::1;::::0;148:2:1;133:18;114197:31:0::1;;;;;;;;114009:226:::0;:::o;109576:57::-;102944:13;:11;:13::i;:::-;109576:57::o;115479:2777::-;115617:18;115671:11;115655:27;;:12;:27;;;115651:68;;115691:28;;;;;;;;;;;;;;115651:68;115761:11;115752:21;;115729:20;115752:21;;;:8;:21;;;;;;;;;;115729:20;115809:38;;73153:5;76808:41;;;115809:25;:36;;;:38::i;:::-;115783:64;;115861:15;115880:1;115861:20;115857:53;;115890:20;;;;;;;;;;;;;;115857:53;115944:22;;;115920:21;115944:22;;;:8;:22;;;;;;;;;;115920:21;116003:39;;73153:5;76808:41;;;116003:26;76616:242;116003:39;115976:66;;116056:16;116076:1;116056:21;116052:55;;116086:21;;;;;;;;;;;;;;116052:55;116435:12;;116157:13;;116117:15;;116434:56;;116475:15;;12755:2;116435:36;116434:56;:::i;:::-;116414:76;-1:-1:-1;116619:22:0;116707:15;116688:16;116644:41;73041:5;76463:44;;;;;116644:28;76269:247;116644:41;:60;;;;:::i;:::-;:78;;;;:::i;:::-;116619:103;-1:-1:-1;117171:20:0;117421:15;117402:16;117350:39;72924:5;76134:41;;;;;117350:26;75942:242;117350:39;117322:13;117281:38;72812:5;75807:40;;;;;117281:25;75616:240;117281:38;:54;;;;:::i;:::-;117208:58;18649:5;20542:42;;;117208:58;:37;75490:39;72701:6;75490:39;;;;117208:24;75300:238;117208:37;:58;;;;:::i;:::-;:127;;;;:::i;:::-;:181;;;;:::i;:::-;117194:224;;;;:::i;:::-;:242;;;;:::i;:::-;117171:265;-1:-1:-1;117621:19:0;12755:2;117659:35;:20;;;:22;76940:217;117659:35;117644:50;;:12;:50;:::i;:::-;117643:76;;117621:98;;118026:213;118078:9;118122:14;118169:12;118213:11;118026:21;:213::i;:::-;117994:255;;;;;;;;;;;115479:2777;;;;;;:::o;106720:212::-;105912:13;;91969:10;;106819:24;105912:13;106819:24;;106811:78;;;;;;;8004:2:1;106811:78:0;;;7986:21:1;8043:2;8023:18;;;8016:30;8082:34;8062:18;;;8055:62;8153:11;8133:18;;;8126:39;8182:19;;106811:78:0;;;;;;;;;106899:26;106918:6;106899:18;:26::i;:::-;106762:170;106720:212::o;112951:141::-;83062:19;83085:13;;;;;;83084:14;;83130:34;;;;-1:-1:-1;83148:12:0;;83163:1;83148:12;;;;:16;83130:34;83129:108;;;-1:-1:-1;83209:4:0;57726:19;:23;;;83170:66;;-1:-1:-1;83219:12:0;;;;;:17;83170:66;83108:201;;;;;;;8414:2:1;83108:201:0;;;8396:21:1;8453:2;8433:18;;;8426:30;8492:34;8472:18;;;8465:62;8563:16;8543:18;;;8536:44;8597:19;;83108:201:0;8212:410:1;83108:201:0;83319:12;:16;;;;83334:1;83319:16;;;83345:65;;;;83379:13;:20;;;;;;;;83345:65;113064:21:::1;:19;:21::i;:::-;83434:14:::0;83430:99;;;83480:5;83464:21;;;;;;83504:14;;-1:-1:-1;8779:36:1;;83504:14:0;;8767:2:1;8752:18;83504:14:0;8627:194:1;114280:214:0;114338:15;114355:22;114381:21;114395:6;114381:13;:21::i;:::-;114337:65;;;;114416:10;114412:76;;;114442:35;114454:6;114462:14;114442:11;:35::i;:::-;114327:167;;114280:214;:::o;106125:178::-;102944:13;:11;:13::i;:::-;106214::::1;:24:::0;;::::1;::::0;::::1;::::0;;;::::1;::::0;::::1;::::0;;;106278:7:::1;103123:6:::0;;;;;103051:85;106278:7:::1;106253:43;;;;;;;;;;;;106125:178:::0;:::o;70049:98::-;70091:6;70116:24;:13;:22;:24::i;:::-;70109:31;;70049:98;:::o;36170:187::-;36226:6;36261:16;36252:25;;;36244:76;;;;;;;9028:2:1;36244:76:0;;;9010:21:1;9067:2;9047:18;;;9040:30;9106:34;9086:18;;;9079:62;9177:8;9157:18;;;9150:36;9203:19;;36244:76:0;8826:402:1;36244:76:0;-1:-1:-1;36344:5:0;36170:187::o;14177:512::-;14235:13;14330:39;12537:1;14330:39;;;;;;14454:47;;;;14515:16;;;14511:172;;-1:-1:-1;14554:8:0;14177:512;-1:-1:-1;;14177:512:0:o;14511:172::-;14629:3;:14;;;14628:30;;;14177:512;-1:-1:-1;;14177:512:0:o;103209:130::-;103123:6;;103272:23;103123:6;91969:10;103272:23;103264:68;;;;;;;9435:2:1;103264:68:0;;;9417:21:1;;;9454:18;;;9447:30;9513:34;9493:18;;;9486:62;9565:18;;103264:68:0;9233:356:1;13040:961:0;13096:6;13177:11;13191:25;13210:5;16771:1;15288:34;15282:41;;15279:1;15275:49;15503:9;;;15777:18;15771:25;;15768:1;15764:33;15815:9;;;15988:10;15982:17;;15979:1;15975:25;16018:9;;;16191:6;16185:13;;16182:1;16178:21;16217:9;;;16389:4;16383:11;;16380:1;16376:19;;;16413:9;;;16585:3;16579:10;;16576:1;16572:18;16608:9;;;16774:10;;;16767:18;;16803:9;;;16959:10;;;;15844;;;;16047;;;;16246;16442;16637;;;;16832;;;;16989;;14797:2218;13191:25;13177:39;;13411:1;13405:3;:7;13401:594;;;13527:27;13541:5;13549:4;13527:7;:27::i;13401:594::-;13714:7;;;13920:50;13934:17;;;13714:7;13920;:50::i;:::-;13913:57;13040:961;-1:-1:-1;;;;13040:961:0:o;118664:188::-;118743:16;;;;;;;:8;:16;;;;;;;;;:33;;;;;;;;;;;;;118791:54;;9765:42:1;;;9823:18;;;9816:67;118791:54:0;;9738:18:1;118791:54:0;;;;;;;118664:188;;:::o;96725:803::-;96885:4;97203:318;97240:43;4861:2;97241:10;:30;;97240:41;:43::i;:::-;97314:48;4861:2;97315:15;:35;;97314:46;:48::i;:::-;97391:46;4861:2;97392:13;:33;;97391:44;:46::i;:::-;97465:45;4861:2;97466:12;:32;;97465:43;:45::i;:::-;96430:39;95080:6;96430:39;;;;96484:49;95202:6;96484:49;;;;96430:103;96548:45;95320:5;96548:45;;;;96430:163;96608:21;;;96430:199;96188:458;;;;;;;97203:318;97196:325;96725:803;-1:-1:-1;;;;;96725:803:0:o;106487:153::-;106576:13;106569:20;;;;;;106599:34;106624:8;106599:24;:34::i;105448:100::-;85157:13;;;;;;;85149:69;;;;;;;10096:2:1;85149:69:0;;;10078:21:1;10135:2;10115:18;;;10108:30;10174:34;10154:18;;;10147:62;10245:13;10225:18;;;10218:41;10276:19;;85149:69:0;9894:407:1;85149:69:0;105515:26:::1;:24;:26::i;119315:1416::-:0;119445:16;;;;119376:15;119445:16;;;:8;:16;;;;;;119376:15;;;;119445:16;;;;;119554:11;119544:21;;;;;119540:50;;119575:5;;119582:7;;-1:-1:-1;119315:1416:0;-1:-1:-1;;119315:1416:0:o;119540:50::-;119643:52;;;;;;4502:23:1;;119643:52:0;;;4484:42:1;119601:16:0;;;;119643:44;119664:11;119643:44;;;;4457:18:1;;119643:52:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;:::i;:::-;119600:95;;;;119875:12;119891:1;119875:17;119871:46;;-1:-1:-1;119902:5:0;;119909:7;;-1:-1:-1;119315:1416:0;;-1:-1:-1;;;119315:1416:0:o;119871:46::-;119993:651;120043:74;72701:6;75490:39;;;;;72701:6;75490:39;;;;;120104:12;120043:19;:74::i;:::-;120143:76;72812:5;75807:40;;;;;72812:5;75807:40;;;;;120206:12;120143:19;:76::i;:::-;120246:78;72924:5;76134:41;;;;;72924:5;76134:41;;;;;120311:12;120246:19;:78::i;:::-;120353:82;73041:5;76463:44;;;;;73041:5;76463:44;;;;;120422:12;120353:19;:82::i;:::-;120462:78;73153:5;76808:41;;;;;73153:5;76808:41;;;;;120527:12;120462:19;:78::i;:::-;120563:70;120583:14;;;120601:15;;;120620:12;120563:19;:70::i;119993:651::-;119976:668;;120716:7;120667:57;;120682:14;120667:57;;;;120654:70;;119417:1314;;;119315:1416;;;:::o;17079:223::-;17241:34;12537:1;17241:34;;;;17278:16;;;17241:53;17079:223;;;;;:::o;34122:187::-;34178:6;34213:16;34204:25;;;34196:76;;;;;;;10899:2:1;34196:76:0;;;10881:21:1;10938:2;10918:18;;;10911:30;10977:34;10957:18;;;10950:62;11048:8;11028:18;;;11021:36;11074:19;;34196:76:0;10697:402:1;104276:187:0;104368:6;;;;104384:17;;;;;;;;;;;104416:40;;104368:6;;;104384:17;104368:6;;104416:40;;104349:16;;104416:40;104339:124;104276:187;:::o;102714:111::-;85157:13;;;;;;;85149:69;;;;;;;10096:2:1;85149:69:0;;;10078:21:1;10135:2;10115:18;;;10108:30;10174:34;10154:18;;;10147:62;10245:13;10225:18;;;10218:41;10276:19;;85149:69:0;9894:407:1;85149:69:0;102786:32:::1;91969:10:::0;102786:18:::1;:32::i;120840:633::-:0;120971:23;121231:20;:7;:18;;;:20::i;:::-;121207:21;:8;:19;;;:21::i;:::-;:44;121203:264;;;111835:9;121274:12;:51;:72;;121338:8;121274:72;;;121328:7;121274:72;121267:79;;;;121203:264;111913:7;121384:12;:51;:72;;121448:8;121384:72;;196:482:1;238:3;276:5;270:12;303:6;298:3;291:19;328:1;338:162;352:6;349:1;346:13;338:162;;;414:4;470:13;;;466:22;;460:29;442:11;;;438:20;;431:59;367:12;338:162;;;342:3;545:1;538:4;529:6;524:3;520:16;516:27;509:38;667:4;597:66;592:2;584:6;580:15;576:88;571:3;567:98;563:109;556:116;;;196:482;;;;:::o;683:220::-;832:2;821:9;814:21;795:4;852:45;893:2;882:9;878:18;870:6;852:45;:::i;908:163::-;975:20;;1035:10;1024:22;;1014:33;;1004:61;;1061:1;1058;1051:12;1004:61;908:163;;;:::o;1076:184::-;1134:6;1187:2;1175:9;1166:7;1162:23;1158:32;1155:52;;;1203:1;1200;1193:12;1155:52;1226:28;1244:9;1226:28;:::i;1805:639::-;1915:6;1923;1976:2;1964:9;1955:7;1951:23;1947:32;1944:52;;;1992:1;1989;1982:12;1944:52;2032:9;2019:23;2061:18;2102:2;2094:6;2091:14;2088:34;;;2118:1;2115;2108:12;2088:34;2156:6;2145:9;2141:22;2131:32;;2201:7;2194:4;2190:2;2186:13;2182:27;2172:55;;2223:1;2220;2213:12;2172:55;2263:2;2250:16;2289:2;2281:6;2278:14;2275:34;;;2305:1;2302;2295:12;2275:34;2358:7;2353:2;2343:6;2340:1;2336:14;2332:2;2328:23;2324:32;2321:45;2318:65;;;2379:1;2376;2369:12;2318:65;2410:2;2402:11;;;;;2432:6;;-1:-1:-1;1805:639:1;;-1:-1:-1;;;;1805:639:1:o;2449:1100::-;2639:4;2668:2;2708;2697:9;2693:18;2738:2;2727:9;2720:21;2761:6;2796;2790:13;2827:6;2819;2812:22;2853:2;2843:12;;2886:2;2875:9;2871:18;2864:25;;2948:2;2938:6;2935:1;2931:14;2920:9;2916:30;2912:39;2986:2;2978:6;2974:15;3007:1;3017:503;3031:6;3028:1;3025:13;3017:503;;;3096:22;;;3120:66;3092:95;3080:108;;3211:13;;3266:9;;3259:17;3252:25;3237:41;;3317:11;;3311:18;3349:15;;;3342:27;;;3392:48;3424:15;;;3311:18;3392:48;:::i;:::-;3498:12;;;;3382:58;-1:-1:-1;;3463:15:1;;;;3053:1;3046:9;3017:503;;;-1:-1:-1;3537:6:1;;2449:1100;-1:-1:-1;;;;;;;;2449:1100:1:o;3554:596::-;3666:6;3674;3682;3690;3698;3706;3714;3767:3;3755:9;3746:7;3742:23;3738:33;3735:53;;;3784:1;3781;3774:12;3735:53;3807:28;3825:9;3807:28;:::i;:::-;3797:38;3882:2;3867:18;;3854:32;;-1:-1:-1;3933:2:1;3918:18;;3905:32;;3984:2;3969:18;;3956:32;;-1:-1:-1;4035:3:1;4020:19;;4007:33;;-1:-1:-1;4087:3:1;4072:19;;4059:33;;-1:-1:-1;4139:3:1;4124:19;4111:33;;-1:-1:-1;3554:596:1;-1:-1:-1;;;3554:596:1:o;4155:180::-;4214:6;4267:2;4255:9;4246:7;4242:23;4238:32;4235:52;;;4283:1;4280;4273:12;4235:52;-1:-1:-1;4306:23:1;;4155:180;-1:-1:-1;4155:180:1:o;4537:320::-;4613:6;4621;4629;4682:2;4670:9;4661:7;4657:23;4653:32;4650:52;;;4698:1;4695;4688:12;4650:52;4721:28;4739:9;4721:28;:::i;:::-;4711:38;4796:2;4781:18;;4768:32;;-1:-1:-1;4847:2:1;4832:18;;;4819:32;;4537:320;-1:-1:-1;;;4537:320:1:o;5093:309::-;5152:6;5205:2;5193:9;5184:7;5180:23;5176:32;5173:52;;;5221:1;5218;5211:12;5173:52;5260:9;5247:23;5310:42;5303:5;5299:54;5292:5;5289:65;5279:93;;5368:1;5365;5358:12;5407:184;5459:77;5456:1;5449:88;5556:4;5553:1;5546:15;5580:4;5577:1;5570:15;5596:184;5648:77;5645:1;5638:88;5745:4;5742:1;5735:15;5769:4;5766:1;5759:15;5785:380;5875:4;5933:11;5920:25;6023:66;6012:8;5996:14;5992:29;5988:102;5968:18;5964:127;5954:155;;6105:1;6102;6095:12;5954:155;6126:33;;;;;5785:380;-1:-1:-1;;5785:380:1:o;6170:580::-;6247:4;6253:6;6313:11;6300:25;6403:66;6392:8;6376:14;6372:29;6368:102;6348:18;6344:127;6334:155;;6485:1;6482;6475:12;6334:155;6512:33;;6564:20;;;-1:-1:-1;6607:18:1;6596:30;;6593:50;;;6639:1;6636;6629:12;6593:50;6672:4;6660:17;;-1:-1:-1;6703:14:1;6699:27;;;6689:38;;6686:58;;;6740:1;6737;6730:12;6686:58;6170:580;;;;;:::o;6755:271::-;6938:6;6930;6925:3;6912:33;6894:3;6964:16;;6989:13;;;6964:16;6755:271;-1:-1:-1;6755:271:1:o;7031:184::-;7083:77;7080:1;7073:88;7180:4;7177:1;7170:15;7204:4;7201:1;7194:15;7220:274;7260:1;7286;7276:189;;7321:77;7318:1;7311:88;7422:4;7419:1;7412:15;7450:4;7447:1;7440:15;7276:189;-1:-1:-1;7479:9:1;;7220:274::o;7499:168::-;7572:9;;;7603;;7620:15;;;7614:22;;7600:37;7590:71;;7641:18;;:::i;7672:125::-;7737:9;;;7758:10;;;7755:36;;;7771:18;;:::i;10306:386::-;10413:6;10421;10474:2;10462:9;10453:7;10449:23;10445:32;10442:52;;;10490:1;10487;10480:12;10442:52;10522:9;10516:16;10572:26;10565:5;10561:38;10554:5;10551:49;10541:77;;10614:1;10611;10604:12;10541:77;10682:2;10667:18;;;;10661:25;10637:5;;10661:25;;-1:-1:-1;;;10306:386:1:o","abiDefinition":[{"inputs":[{"internalType":"uint32","name":"synapseDomain_","type":"uint32"},{"internalType":"address","name":"destination_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"IncorrectDestinationDomain","type":"error"},{"inputs":[],"name":"IncorrectVersionLength","type":"error"},{"inputs":[],"name":"LocalGasDataNotSet","type":"error"},{"inputs":[],"name":"RemoteGasDataNotSet","type":"error"},{"inputs":[],"name":"SummitTipTooHigh","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint32","name":"domain","type":"uint32"},{"indexed":false,"internalType":"uint256","name":"paddedGasData","type":"uint256"}],"name":"GasDataUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"summitTipWei","type":"uint256"}],"name":"SummitTipUpdated","type":"event"},{"inputs":[],"name":"GAS_DATA_DECREASED_OPTIMISTIC_PERIOD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"GAS_DATA_INCREASED_OPTIMISTIC_PERIOD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"destination","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"domain","type":"uint32"}],"name":"getDecodedGasData","outputs":[{"internalType":"uint256","name":"gasPrice","type":"uint256"},{"internalType":"uint256","name":"dataPrice","type":"uint256"},{"internalType":"uint256","name":"execBuffer","type":"uint256"},{"internalType":"uint256","name":"amortAttCost","type":"uint256"},{"internalType":"uint256","name":"etherPrice","type":"uint256"},{"internalType":"uint256","name":"markup","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getGasData","outputs":[{"internalType":"uint256","name":"paddedGasData","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"destination_","type":"uint32"},{"internalType":"uint256","name":"paddedRequest","type":"uint256"},{"internalType":"uint256","name":"contentLength","type":"uint256"}],"name":"getMinimumTips","outputs":[{"internalType":"uint256","name":"paddedTips","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"localDomain","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"allowFailure","type":"bool"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct MultiCallable.Call[]","name":"calls","type":"tuple[]"}],"name":"multicall","outputs":[{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct MultiCallable.Result[]","name":"callResults","type":"tuple[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"domain","type":"uint32"},{"internalType":"uint256","name":"gasPrice","type":"uint256"},{"internalType":"uint256","name":"dataPrice","type":"uint256"},{"internalType":"uint256","name":"execBuffer","type":"uint256"},{"internalType":"uint256","name":"amortAttCost","type":"uint256"},{"internalType":"uint256","name":"etherPrice","type":"uint256"},{"internalType":"uint256","name":"markup","type":"uint256"}],"name":"setGasData","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"summitTipWei_","type":"uint256"}],"name":"setSummitTip","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"summitTipWei","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"synapseDomain","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"domain","type":"uint32"}],"name":"updateGasData","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"versionString","type":"string"}],"stateMutability":"view","type":"function"}],"userDoc":{"events":{"GasDataUpdated(uint32,uint256)":{"notice":"Emitted when gas data is updated for the domain"},"SummitTipUpdated(uint256)":{"notice":"Emitted when the value of the summit tip is updated"}},"kind":"user","methods":{"getDecodedGasData(uint32)":{"notice":"Returns the gas data for the given domain, in the decoded format."},"getGasData()":{"notice":"Returns the gas data for the local chain."},"getMinimumTips(uint32,uint256,uint256)":{"notice":"Returns the minimum tips for sending a message to a given destination."},"initialize()":{"notice":"Initializes GasOracle contract: - msg.sender is set as contract owner"},"localDomain()":{"notice":"Domain of the local chain, set once upon contract creation"},"multicall((bool,bytes)[])":{"notice":"Aggregates a few calls to this contract into one multicall without modifying `msg.sender`."},"setGasData(uint32,uint256,uint256,uint256,uint256,uint256,uint256)":{"notice":"MVP function to set the gas data for the given domain."},"setSummitTip(uint256)":{"notice":"MVP function to set the summit tip."},"updateGasData(uint32)":{"notice":"Fetches the latest gas data for the chain from `Destination` contract, and uses it to update the oracle values for the requested chain."}},"notice":"`GasOracle` contract is responsible for tracking the gas data for both local and remote chains. ## Local gas data tracking - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values for different \"gas statistics\" _(to be implemented in the future)_. - These values are cached, so that the reported values are only changed when a big enough change is detected. - In the MVP version the gas data is set manually by the owner of the contract. - The reported values are included in Origin's State, whenever a new message is sent. \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots. ## Remote gas data tracking - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside their attestations. - As the gas data is cached, this leads to a storage write only when the gas data for the remote chain changes significantly. - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`. - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing. \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the \u003e Executors to be protected against that.","version":1},"developerDoc":{"kind":"dev","methods":{"acceptOwnership()":{"details":"The new owner accepts the ownership transfer."},"getDecodedGasData(uint32)":{"params":{"domain":"Domain of chain to get gas data for"},"returns":{"amortAttCost":"Amortized cost for attestation submission (in Wei)","dataPrice":" Calldata price (in Wei per byte of content)","etherPrice":" Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)","execBuffer":" Tx fee safety buffer for message execution (in Wei)","gasPrice":" Gas price for the chain (in Wei per gas unit)","markup":" Markup for the message execution (in BWAD)"}},"getMinimumTips(uint32,uint256,uint256)":{"params":{"contentLength":"The length of the message content","destination":"Domain of destination chain","paddedRequest":"Padded encoded message execution request on destination chain"},"returns":{"paddedTips":" Padded encoded minimum tips information"}},"owner()":{"details":"Returns the address of the current owner."},"pendingOwner()":{"details":"Returns the address of the pending owner."},"renounceOwnership()":{"details":"Should be impossible to renounce ownership; we override OpenZeppelin OwnableUpgradeable's implementation of renounceOwnership to make it a no-op"},"transferOwnership(address)":{"details":"Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. Can only be called by the current owner."},"updateGasData(uint32)":{"params":{"domain":"Domain to update the gas data for"}}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"synapseDomain_\",\"type\":\"uint32\"},{\"internalType\":\"address\",\"name\":\"destination_\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"inputs\":[],\"name\":\"IncorrectDestinationDomain\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"IncorrectVersionLength\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"LocalGasDataNotSet\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"RemoteGasDataNotSet\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"SummitTipTooHigh\",\"type\":\"error\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"domain\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"paddedGasData\",\"type\":\"uint256\"}],\"name\":\"GasDataUpdated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"version\",\"type\":\"uint8\"}],\"name\":\"Initialized\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferStarted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"summitTipWei\",\"type\":\"uint256\"}],\"name\":\"SummitTipUpdated\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"GAS_DATA_DECREASED_OPTIMISTIC_PERIOD\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"GAS_DATA_INCREASED_OPTIMISTIC_PERIOD\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"acceptOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"destination\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"domain\",\"type\":\"uint32\"}],\"name\":\"getDecodedGasData\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"gasPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"dataPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"execBuffer\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"amortAttCost\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"etherPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"markup\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getGasData\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"paddedGasData\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"destination_\",\"type\":\"uint32\"},{\"internalType\":\"uint256\",\"name\":\"paddedRequest\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"contentLength\",\"type\":\"uint256\"}],\"name\":\"getMinimumTips\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"paddedTips\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"initialize\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"localDomain\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"components\":[{\"internalType\":\"bool\",\"name\":\"allowFailure\",\"type\":\"bool\"},{\"internalType\":\"bytes\",\"name\":\"callData\",\"type\":\"bytes\"}],\"internalType\":\"struct MultiCallable.Call[]\",\"name\":\"calls\",\"type\":\"tuple[]\"}],\"name\":\"multicall\",\"outputs\":[{\"components\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"},{\"internalType\":\"bytes\",\"name\":\"returnData\",\"type\":\"bytes\"}],\"internalType\":\"struct MultiCallable.Result[]\",\"name\":\"callResults\",\"type\":\"tuple[]\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"pendingOwner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"domain\",\"type\":\"uint32\"},{\"internalType\":\"uint256\",\"name\":\"gasPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"dataPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"execBuffer\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"amortAttCost\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"etherPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"markup\",\"type\":\"uint256\"}],\"name\":\"setGasData\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"summitTipWei_\",\"type\":\"uint256\"}],\"name\":\"setSummitTip\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"summitTipWei\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"synapseDomain\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"domain\",\"type\":\"uint32\"}],\"name\":\"updateGasData\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"version\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"versionString\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"acceptOwnership()\":{\"details\":\"The new owner accepts the ownership transfer.\"},\"getDecodedGasData(uint32)\":{\"params\":{\"domain\":\"Domain of chain to get gas data for\"},\"returns\":{\"amortAttCost\":\"Amortized cost for attestation submission (in Wei)\",\"dataPrice\":\" Calldata price (in Wei per byte of content)\",\"etherPrice\":\" Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\",\"execBuffer\":\" Tx fee safety buffer for message execution (in Wei)\",\"gasPrice\":\" Gas price for the chain (in Wei per gas unit)\",\"markup\":\" Markup for the message execution (in BWAD)\"}},\"getMinimumTips(uint32,uint256,uint256)\":{\"params\":{\"contentLength\":\"The length of the message content\",\"destination\":\"Domain of destination chain\",\"paddedRequest\":\"Padded encoded message execution request on destination chain\"},\"returns\":{\"paddedTips\":\" Padded encoded minimum tips information\"}},\"owner()\":{\"details\":\"Returns the address of the current owner.\"},\"pendingOwner()\":{\"details\":\"Returns the address of the pending owner.\"},\"renounceOwnership()\":{\"details\":\"Should be impossible to renounce ownership; we override OpenZeppelin OwnableUpgradeable's implementation of renounceOwnership to make it a no-op\"},\"transferOwnership(address)\":{\"details\":\"Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. Can only be called by the current owner.\"},\"updateGasData(uint32)\":{\"params\":{\"domain\":\"Domain to update the gas data for\"}}},\"version\":1},\"userdoc\":{\"events\":{\"GasDataUpdated(uint32,uint256)\":{\"notice\":\"Emitted when gas data is updated for the domain\"},\"SummitTipUpdated(uint256)\":{\"notice\":\"Emitted when the value of the summit tip is updated\"}},\"kind\":\"user\",\"methods\":{\"getDecodedGasData(uint32)\":{\"notice\":\"Returns the gas data for the given domain, in the decoded format.\"},\"getGasData()\":{\"notice\":\"Returns the gas data for the local chain.\"},\"getMinimumTips(uint32,uint256,uint256)\":{\"notice\":\"Returns the minimum tips for sending a message to a given destination.\"},\"initialize()\":{\"notice\":\"Initializes GasOracle contract: - msg.sender is set as contract owner\"},\"localDomain()\":{\"notice\":\"Domain of the local chain, set once upon contract creation\"},\"multicall((bool,bytes)[])\":{\"notice\":\"Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\"},\"setGasData(uint32,uint256,uint256,uint256,uint256,uint256,uint256)\":{\"notice\":\"MVP function to set the gas data for the given domain.\"},\"setSummitTip(uint256)\":{\"notice\":\"MVP function to set the summit tip.\"},\"updateGasData(uint32)\":{\"notice\":\"Fetches the latest gas data for the chain from `Destination` contract, and uses it to update the oracle values for the requested chain.\"}},\"notice\":\"`GasOracle` contract is responsible for tracking the gas data for both local and remote chains. ## Local gas data tracking - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values for different \\\"gas statistics\\\" _(to be implemented in the future)_. - These values are cached, so that the reported values are only changed when a big enough change is detected. - In the MVP version the gas data is set manually by the owner of the contract. - The reported values are included in Origin's State, whenever a new message is sent. \u003e This leads to cached \\\"chain gas data\\\" being included in the Guard and Notary snapshots. ## Remote gas data tracking - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside their attestations. - As the gas data is cached, this leads to a storage write only when the gas data for the remote chain changes significantly. - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`. - The optimistic period is smaller when the \\\"gas statistics\\\" are increasing, and bigger when they are decreasing. \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the \u003e Executors to be protected against that.\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"GasOracle\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{"GAS_DATA_DECREASED_OPTIMISTIC_PERIOD()":"621b58de","GAS_DATA_INCREASED_OPTIMISTIC_PERIOD()":"33ae7bb7","acceptOwnership()":"79ba5097","destination()":"b269681d","getDecodedGasData(uint32)":"556517b7","getGasData()":"34926b29","getMinimumTips(uint32,uint256,uint256)":"72010a93","initialize()":"8129fc1c","localDomain()":"8d3638f4","multicall((bool,bytes)[])":"60fc8466","owner()":"8da5cb5b","pendingOwner()":"e30c3978","renounceOwnership()":"715018a6","setGasData(uint32,uint256,uint256,uint256,uint256,uint256,uint256)":"64619d66","setSummitTip(uint256)":"67fb4093","summitTipWei()":"aa929c57","synapseDomain()":"717b8638","transferOwnership(address)":"f2fde38b","updateGasData(uint32)":"867baea5","version()":"54fd4d50"}},"solidity/GasOracle.sol:GasOracleEvents":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint32","name":"domain","type":"uint32"},{"indexed":false,"internalType":"uint256","name":"paddedGasData","type":"uint256"}],"name":"GasDataUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"summitTipWei","type":"uint256"}],"name":"SummitTipUpdated","type":"event"}],"userDoc":{"events":{"GasDataUpdated(uint32,uint256)":{"notice":"Emitted when gas data is updated for the domain"},"SummitTipUpdated(uint256)":{"notice":"Emitted when the value of the summit tip is updated"}},"kind":"user","methods":{},"notice":"A collection of events emitted by the GasOracle contract","version":1},"developerDoc":{"events":{"GasDataUpdated(uint32,uint256)":{"params":{"domain":"Domain of chain the gas data is for","paddedGasData":"Padded encoded gas data"}},"SummitTipUpdated(uint256)":{"params":{"summitTipWei":"The new value of the summit tip in Mainnet wei"}}},"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"domain\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"paddedGasData\",\"type\":\"uint256\"}],\"name\":\"GasDataUpdated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"summitTipWei\",\"type\":\"uint256\"}],\"name\":\"SummitTipUpdated\",\"type\":\"event\"}],\"devdoc\":{\"events\":{\"GasDataUpdated(uint32,uint256)\":{\"params\":{\"domain\":\"Domain of chain the gas data is for\",\"paddedGasData\":\"Padded encoded gas data\"}},\"SummitTipUpdated(uint256)\":{\"params\":{\"summitTipWei\":\"The new value of the summit tip in Mainnet wei\"}}},\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"events\":{\"GasDataUpdated(uint32,uint256)\":{\"notice\":\"Emitted when gas data is updated for the domain\"},\"SummitTipUpdated(uint256)\":{\"notice\":\"Emitted when the value of the summit tip is updated\"}},\"kind\":\"user\",\"methods\":{},\"notice\":\"A collection of events emitted by the GasOracle contract\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"GasOracleEvents\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:Initializable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"}],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"custom:oz-upgrades-unsafe-allow":"constructor constructor() { _disableInitializers(); } ``` ====","details":"This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. The initialization functions use a version number. Once a version number is used, it is consumed and cannot be reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in case an upgrade adds a module that needs to be initialized. For example: [.hljs-theme-light.nopadding] ```solidity contract MyToken is ERC20Upgradeable { function initialize() initializer public { __ERC20_init(\"MyToken\", \"MTK\"); } } contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { function initializeV2() reinitializer(2) public { __ERC20Permit_init(\"MyToken\"); } } ``` TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. [CAUTION] ==== Avoid leaving a contract uninitialized. An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: [.hljs-theme-light.nopadding] ```","events":{"Initialized(uint8)":{"details":"Triggered when the contract has been initialized or reinitialized."}},"kind":"dev","methods":{},"stateVariables":{"_initialized":{"custom:oz-retyped-from":"bool","details":"Indicates that the contract has been initialized."},"_initializing":{"details":"Indicates that the contract is in the process of being initialized."}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"version\",\"type\":\"uint8\"}],\"name\":\"Initialized\",\"type\":\"event\"}],\"devdoc\":{\"custom:oz-upgrades-unsafe-allow\":\"constructor constructor() { _disableInitializers(); } ``` ====\",\"details\":\"This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. The initialization functions use a version number. Once a version number is used, it is consumed and cannot be reused. This mechanism prevents re-execution of each \\\"step\\\" but allows the creation of new initialization steps in case an upgrade adds a module that needs to be initialized. For example: [.hljs-theme-light.nopadding] ```solidity contract MyToken is ERC20Upgradeable { function initialize() initializer public { __ERC20_init(\\\"MyToken\\\", \\\"MTK\\\"); } } contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { function initializeV2() reinitializer(2) public { __ERC20Permit_init(\\\"MyToken\\\"); } } ``` TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. [CAUTION] ==== Avoid leaving a contract uninitialized. An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: [.hljs-theme-light.nopadding] ```\",\"events\":{\"Initialized(uint8)\":{\"details\":\"Triggered when the contract has been initialized or reinitialized.\"}},\"kind\":\"dev\",\"methods\":{},\"stateVariables\":{\"_initialized\":{\"custom:oz-retyped-from\":\"bool\",\"details\":\"Indicates that the contract has been initialized.\"},\"_initializing\":{\"details\":\"Indicates that the contract is in the process of being initialized.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"Initializable\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:InterfaceDestination":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"inputs":[{"internalType":"uint32","name":"notaryIndex","type":"uint32"},{"internalType":"uint256","name":"sigIndex","type":"uint256"},{"internalType":"bytes","name":"attPayload","type":"bytes"},{"internalType":"bytes32","name":"agentRoot","type":"bytes32"},{"internalType":"ChainGas[]","name":"snapGas","type":"uint128[]"}],"name":"acceptAttestation","outputs":[{"internalType":"bool","name":"wasAccepted","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"attestationsAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"destStatus","outputs":[{"internalType":"uint40","name":"snapRootTime","type":"uint40"},{"internalType":"uint40","name":"agentRootTime","type":"uint40"},{"internalType":"uint32","name":"notaryIndex","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getAttestation","outputs":[{"internalType":"bytes","name":"attPayload","type":"bytes"},{"internalType":"bytes","name":"attSignature","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"domain","type":"uint32"}],"name":"getGasData","outputs":[{"internalType":"GasData","name":"gasData","type":"uint96"},{"internalType":"uint256","name":"dataMaturity","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"notaryIndex","type":"uint32"}],"name":"lastAttestationNonce","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nextAgentRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"passAgentRoot","outputs":[{"internalType":"bool","name":"rootPending","type":"bool"}],"stateMutability":"nonpayable","type":"function"}],"userDoc":{"kind":"user","methods":{"acceptAttestation(uint32,uint256,bytes,bytes32,uint128[])":{"notice":"Accepts an attestation, which local `AgentManager` verified to have been signed by an active Notary for this chain. \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain. - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree. - Messages coming from chains included in the Attestation's snapshot could be proven. - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken. \u003e Will revert if any of these is true: \u003e - Called by anyone other than local `AgentManager`. \u003e - Attestation payload is not properly formatted. \u003e - Attestation signer is in Dispute. \u003e - Attestation's snapshot root has been previously submitted. Note: agentRoot and snapGas have been verified by the local `AgentManager`."},"attestationsAmount()":{"notice":"Returns the total amount of Notaries attestations that have been accepted."},"destStatus()":{"notice":"Returns status of Destination contract as far as snapshot/agent roots are concerned"},"getAttestation(uint256)":{"notice":"Returns a Notary-signed attestation with a given index. \u003e Index refers to the list of all attestations accepted by this contract."},"getGasData(uint32)":{"notice":"Returns the gas data for a given chain from the latest accepted attestation with that chain."},"lastAttestationNonce(uint32)":{"notice":"Returns the nonce of the last attestation submitted by a Notary with a given agent index."},"nextAgentRoot()":{"notice":"Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over."},"passAgentRoot()":{"notice":"Attempts to pass a quarantined Agent Merkle Root to a local Light Manager."}},"version":1},"developerDoc":{"kind":"dev","methods":{"acceptAttestation(uint32,uint256,bytes,bytes32,uint128[])":{"params":{"agentRoot":"Agent Merkle Root from the Attestation","attPayload":"Raw payload with Attestation data","notaryIndex":"Index of Attestation Notary in Agent Merkle Tree","sigIndex":"Index of stored Notary signature","snapGas":"Gas data for each chain in the Attestation's snapshot"},"returns":{"wasAccepted":" Whether the Attestation was accepted"}},"destStatus()":{"returns":{"agentRootTime":" Timestamp when latest agent root was accepted","notaryIndex":" Index of Notary who signed the latest agent root","snapRootTime":" Timestamp when latest snapshot root was accepted"}},"getAttestation(uint256)":{"details":"Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit. Will return an empty signature if this contract is deployed on Synapse Chain.","params":{"index":"Attestation index"},"returns":{"attPayload":" Raw payload with Attestation data","attSignature":" Notary signature for the reported attestation"}},"getGasData(uint32)":{"details":"Will return empty values if there is no data for the domain, or if the notary who provided the data is in dispute.","params":{"domain":"Domain for the chain"},"returns":{"dataMaturity":" Gas data age in seconds","gasData":" Gas data for the chain"}},"lastAttestationNonce(uint32)":{"details":"Will return zero if the Notary hasn't submitted any attestations yet."},"passAgentRoot()":{"details":"Will do nothing, if root optimistic period is not over.","returns":{"rootPending":" Whether there is a pending agent merkle root left"}}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"notaryIndex\",\"type\":\"uint32\"},{\"internalType\":\"uint256\",\"name\":\"sigIndex\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"attPayload\",\"type\":\"bytes\"},{\"internalType\":\"bytes32\",\"name\":\"agentRoot\",\"type\":\"bytes32\"},{\"internalType\":\"ChainGas[]\",\"name\":\"snapGas\",\"type\":\"uint128[]\"}],\"name\":\"acceptAttestation\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"wasAccepted\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"attestationsAmount\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"destStatus\",\"outputs\":[{\"internalType\":\"uint40\",\"name\":\"snapRootTime\",\"type\":\"uint40\"},{\"internalType\":\"uint40\",\"name\":\"agentRootTime\",\"type\":\"uint40\"},{\"internalType\":\"uint32\",\"name\":\"notaryIndex\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"getAttestation\",\"outputs\":[{\"internalType\":\"bytes\",\"name\":\"attPayload\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"attSignature\",\"type\":\"bytes\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"domain\",\"type\":\"uint32\"}],\"name\":\"getGasData\",\"outputs\":[{\"internalType\":\"GasData\",\"name\":\"gasData\",\"type\":\"uint96\"},{\"internalType\":\"uint256\",\"name\":\"dataMaturity\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"notaryIndex\",\"type\":\"uint32\"}],\"name\":\"lastAttestationNonce\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"nextAgentRoot\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"passAgentRoot\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"rootPending\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"acceptAttestation(uint32,uint256,bytes,bytes32,uint128[])\":{\"params\":{\"agentRoot\":\"Agent Merkle Root from the Attestation\",\"attPayload\":\"Raw payload with Attestation data\",\"notaryIndex\":\"Index of Attestation Notary in Agent Merkle Tree\",\"sigIndex\":\"Index of stored Notary signature\",\"snapGas\":\"Gas data for each chain in the Attestation's snapshot\"},\"returns\":{\"wasAccepted\":\" Whether the Attestation was accepted\"}},\"destStatus()\":{\"returns\":{\"agentRootTime\":\" Timestamp when latest agent root was accepted\",\"notaryIndex\":\" Index of Notary who signed the latest agent root\",\"snapRootTime\":\" Timestamp when latest snapshot root was accepted\"}},\"getAttestation(uint256)\":{\"details\":\"Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit. Will return an empty signature if this contract is deployed on Synapse Chain.\",\"params\":{\"index\":\"Attestation index\"},\"returns\":{\"attPayload\":\" Raw payload with Attestation data\",\"attSignature\":\" Notary signature for the reported attestation\"}},\"getGasData(uint32)\":{\"details\":\"Will return empty values if there is no data for the domain, or if the notary who provided the data is in dispute.\",\"params\":{\"domain\":\"Domain for the chain\"},\"returns\":{\"dataMaturity\":\" Gas data age in seconds\",\"gasData\":\" Gas data for the chain\"}},\"lastAttestationNonce(uint32)\":{\"details\":\"Will return zero if the Notary hasn't submitted any attestations yet.\"},\"passAgentRoot()\":{\"details\":\"Will do nothing, if root optimistic period is not over.\",\"returns\":{\"rootPending\":\" Whether there is a pending agent merkle root left\"}}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{\"acceptAttestation(uint32,uint256,bytes,bytes32,uint128[])\":{\"notice\":\"Accepts an attestation, which local `AgentManager` verified to have been signed by an active Notary for this chain. \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain. - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree. - Messages coming from chains included in the Attestation's snapshot could be proven. - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken. \u003e Will revert if any of these is true: \u003e - Called by anyone other than local `AgentManager`. \u003e - Attestation payload is not properly formatted. \u003e - Attestation signer is in Dispute. \u003e - Attestation's snapshot root has been previously submitted. Note: agentRoot and snapGas have been verified by the local `AgentManager`.\"},\"attestationsAmount()\":{\"notice\":\"Returns the total amount of Notaries attestations that have been accepted.\"},\"destStatus()\":{\"notice\":\"Returns status of Destination contract as far as snapshot/agent roots are concerned\"},\"getAttestation(uint256)\":{\"notice\":\"Returns a Notary-signed attestation with a given index. \u003e Index refers to the list of all attestations accepted by this contract.\"},\"getGasData(uint32)\":{\"notice\":\"Returns the gas data for a given chain from the latest accepted attestation with that chain.\"},\"lastAttestationNonce(uint32)\":{\"notice\":\"Returns the nonce of the last attestation submitted by a Notary with a given agent index.\"},\"nextAgentRoot()\":{\"notice\":\"Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\"},\"passAgentRoot()\":{\"notice\":\"Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\"}},\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"InterfaceDestination\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{"acceptAttestation(uint32,uint256,bytes,bytes32,uint128[])":"39fe2736","attestationsAmount()":"3cf7b120","destStatus()":"40989152","getAttestation(uint256)":"29be4db2","getGasData(uint32)":"d0dd0675","lastAttestationNonce(uint32)":"305b29ee","nextAgentRoot()":"55252dd1","passAgentRoot()":"a554d1e3"}},"solidity/GasOracle.sol:InterfaceGasOracle":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"inputs":[{"internalType":"uint32","name":"domain","type":"uint32"}],"name":"getDecodedGasData","outputs":[{"internalType":"uint256","name":"gasPrice","type":"uint256"},{"internalType":"uint256","name":"dataPrice","type":"uint256"},{"internalType":"uint256","name":"execBuffer","type":"uint256"},{"internalType":"uint256","name":"amortAttCost","type":"uint256"},{"internalType":"uint256","name":"etherPrice","type":"uint256"},{"internalType":"uint256","name":"markup","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getGasData","outputs":[{"internalType":"uint256","name":"paddedGasData","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"destination","type":"uint32"},{"internalType":"uint256","name":"paddedRequest","type":"uint256"},{"internalType":"uint256","name":"contentLength","type":"uint256"}],"name":"getMinimumTips","outputs":[{"internalType":"uint256","name":"paddedTips","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"domain","type":"uint32"}],"name":"updateGasData","outputs":[],"stateMutability":"nonpayable","type":"function"}],"userDoc":{"kind":"user","methods":{"getDecodedGasData(uint32)":{"notice":"Returns the gas data for the given domain, in the decoded format."},"getGasData()":{"notice":"Returns the gas data for the local chain."},"getMinimumTips(uint32,uint256,uint256)":{"notice":"Returns the minimum tips for sending a message to a given destination."},"updateGasData(uint32)":{"notice":"Fetches the latest gas data for the chain from `Destination` contract, and uses it to update the oracle values for the requested chain."}},"version":1},"developerDoc":{"kind":"dev","methods":{"getDecodedGasData(uint32)":{"params":{"domain":"Domain of chain to get gas data for"},"returns":{"amortAttCost":"Amortized cost for attestation submission (in Wei)","dataPrice":" Calldata price (in Wei per byte of content)","etherPrice":" Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)","execBuffer":" Tx fee safety buffer for message execution (in Wei)","gasPrice":" Gas price for the chain (in Wei per gas unit)","markup":" Markup for the message execution (in BWAD)"}},"getMinimumTips(uint32,uint256,uint256)":{"params":{"contentLength":"The length of the message content","destination":"Domain of destination chain","paddedRequest":"Padded encoded message execution request on destination chain"},"returns":{"paddedTips":" Padded encoded minimum tips information"}},"updateGasData(uint32)":{"params":{"domain":"Domain to update the gas data for"}}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"domain\",\"type\":\"uint32\"}],\"name\":\"getDecodedGasData\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"gasPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"dataPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"execBuffer\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"amortAttCost\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"etherPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"markup\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getGasData\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"paddedGasData\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"destination\",\"type\":\"uint32\"},{\"internalType\":\"uint256\",\"name\":\"paddedRequest\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"contentLength\",\"type\":\"uint256\"}],\"name\":\"getMinimumTips\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"paddedTips\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"domain\",\"type\":\"uint32\"}],\"name\":\"updateGasData\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"getDecodedGasData(uint32)\":{\"params\":{\"domain\":\"Domain of chain to get gas data for\"},\"returns\":{\"amortAttCost\":\"Amortized cost for attestation submission (in Wei)\",\"dataPrice\":\" Calldata price (in Wei per byte of content)\",\"etherPrice\":\" Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\",\"execBuffer\":\" Tx fee safety buffer for message execution (in Wei)\",\"gasPrice\":\" Gas price for the chain (in Wei per gas unit)\",\"markup\":\" Markup for the message execution (in BWAD)\"}},\"getMinimumTips(uint32,uint256,uint256)\":{\"params\":{\"contentLength\":\"The length of the message content\",\"destination\":\"Domain of destination chain\",\"paddedRequest\":\"Padded encoded message execution request on destination chain\"},\"returns\":{\"paddedTips\":\" Padded encoded minimum tips information\"}},\"updateGasData(uint32)\":{\"params\":{\"domain\":\"Domain to update the gas data for\"}}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{\"getDecodedGasData(uint32)\":{\"notice\":\"Returns the gas data for the given domain, in the decoded format.\"},\"getGasData()\":{\"notice\":\"Returns the gas data for the local chain.\"},\"getMinimumTips(uint32,uint256,uint256)\":{\"notice\":\"Returns the minimum tips for sending a message to a given destination.\"},\"updateGasData(uint32)\":{\"notice\":\"Fetches the latest gas data for the chain from `Destination` contract, and uses it to update the oracle values for the requested chain.\"}},\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"InterfaceGasOracle\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{"getDecodedGasData(uint32)":"556517b7","getGasData()":"34926b29","getMinimumTips(uint32,uint256,uint256)":"72010a93","updateGasData(uint32)":"867baea5"}},"solidity/GasOracle.sol:MessagingBase":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"inputs":[],"name":"IncorrectVersionLength","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"localDomain","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"allowFailure","type":"bool"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct MultiCallable.Call[]","name":"calls","type":"tuple[]"}],"name":"multicall","outputs":[{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct MultiCallable.Result[]","name":"callResults","type":"tuple[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"synapseDomain","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"versionString","type":"string"}],"stateMutability":"view","type":"function"}],"userDoc":{"kind":"user","methods":{"localDomain()":{"notice":"Domain of the local chain, set once upon contract creation"},"multicall((bool,bytes)[])":{"notice":"Aggregates a few calls to this contract into one multicall without modifying `msg.sender`."}},"notice":"Base contract for all messaging contracts. - Provides context on the local chain's domain. - Provides ownership functionality. - Will be providing pausing functionality when it is implemented.","version":1},"developerDoc":{"kind":"dev","methods":{"acceptOwnership()":{"details":"The new owner accepts the ownership transfer."},"owner()":{"details":"Returns the address of the current owner."},"pendingOwner()":{"details":"Returns the address of the pending owner."},"renounceOwnership()":{"details":"Should be impossible to renounce ownership; we override OpenZeppelin OwnableUpgradeable's implementation of renounceOwnership to make it a no-op"},"transferOwnership(address)":{"details":"Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. Can only be called by the current owner."}},"stateVariables":{"__GAP":{"details":"gap for upgrade safety"}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"name\":\"IncorrectVersionLength\",\"type\":\"error\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"version\",\"type\":\"uint8\"}],\"name\":\"Initialized\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferStarted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"acceptOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"localDomain\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"components\":[{\"internalType\":\"bool\",\"name\":\"allowFailure\",\"type\":\"bool\"},{\"internalType\":\"bytes\",\"name\":\"callData\",\"type\":\"bytes\"}],\"internalType\":\"struct MultiCallable.Call[]\",\"name\":\"calls\",\"type\":\"tuple[]\"}],\"name\":\"multicall\",\"outputs\":[{\"components\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"},{\"internalType\":\"bytes\",\"name\":\"returnData\",\"type\":\"bytes\"}],\"internalType\":\"struct MultiCallable.Result[]\",\"name\":\"callResults\",\"type\":\"tuple[]\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"pendingOwner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"synapseDomain\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"version\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"versionString\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"acceptOwnership()\":{\"details\":\"The new owner accepts the ownership transfer.\"},\"owner()\":{\"details\":\"Returns the address of the current owner.\"},\"pendingOwner()\":{\"details\":\"Returns the address of the pending owner.\"},\"renounceOwnership()\":{\"details\":\"Should be impossible to renounce ownership; we override OpenZeppelin OwnableUpgradeable's implementation of renounceOwnership to make it a no-op\"},\"transferOwnership(address)\":{\"details\":\"Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. Can only be called by the current owner.\"}},\"stateVariables\":{\"__GAP\":{\"details\":\"gap for upgrade safety\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{\"localDomain()\":{\"notice\":\"Domain of the local chain, set once upon contract creation\"},\"multicall((bool,bytes)[])\":{\"notice\":\"Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\"}},\"notice\":\"Base contract for all messaging contracts. - Provides context on the local chain's domain. - Provides ownership functionality. - Will be providing pausing functionality when it is implemented.\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"MessagingBase\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{"acceptOwnership()":"79ba5097","localDomain()":"8d3638f4","multicall((bool,bytes)[])":"60fc8466","owner()":"8da5cb5b","pendingOwner()":"e30c3978","renounceOwnership()":"715018a6","synapseDomain()":"717b8638","transferOwnership(address)":"f2fde38b","version()":"54fd4d50"}},"solidity/GasOracle.sol:MultiCallable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"inputs":[{"components":[{"internalType":"bool","name":"allowFailure","type":"bool"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct MultiCallable.Call[]","name":"calls","type":"tuple[]"}],"name":"multicall","outputs":[{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct MultiCallable.Result[]","name":"callResults","type":"tuple[]"}],"stateMutability":"nonpayable","type":"function"}],"userDoc":{"kind":"user","methods":{"multicall((bool,bytes)[])":{"notice":"Aggregates a few calls to this contract into one multicall without modifying `msg.sender`."}},"notice":"Collection of Multicall utilities. Fork of Multicall3: https://github.com/mds1/multicall/blob/master/src/Multicall3.sol","version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"components\":[{\"internalType\":\"bool\",\"name\":\"allowFailure\",\"type\":\"bool\"},{\"internalType\":\"bytes\",\"name\":\"callData\",\"type\":\"bytes\"}],\"internalType\":\"struct MultiCallable.Call[]\",\"name\":\"calls\",\"type\":\"tuple[]\"}],\"name\":\"multicall\",\"outputs\":[{\"components\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"},{\"internalType\":\"bytes\",\"name\":\"returnData\",\"type\":\"bytes\"}],\"internalType\":\"struct MultiCallable.Result[]\",\"name\":\"callResults\",\"type\":\"tuple[]\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{\"multicall((bool,bytes)[])\":{\"notice\":\"Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\"}},\"notice\":\"Collection of Multicall utilities. Fork of Multicall3: https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"MultiCallable\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{"multicall((bool,bytes)[])":"60fc8466"}},"solidity/GasOracle.sol:NumberLib":{"code":"0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122071864174b3e7762bc77f01965a5e1200bcb9b16760dc627960d355a1541dbd1064736f6c63430008110033","runtime-code":"0x73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122071864174b3e7762bc77f01965a5e1200bcb9b16760dc627960d355a1541dbd1064736f6c63430008110033","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"12417:4887:0:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;12417:4887:0;;;;;;;;;;;;;;;;;","srcMapRuntime":"12417:4887:0:-:0;;;;;;;;","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"notice":"# Number Library for compact representation of uint256 numbers. - Number is stored using mantissa and exponent, each occupying 8 bits. - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`. - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent` \u003e - `0 \u003c= mantissa \u003c 256` \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256) # Number stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | | ---------- | -------- | ----- | ----- | | (002..001] | mantissa | uint8 | 1 | | (001..000] | exponent | uint8 | 1 |","version":1},"developerDoc":{"kind":"dev","methods":{},"stateVariables":{"BWAD_SHIFT":{"details":"We are using not using 10**18 as wad, because it is not stored precisely in NumberLib."},"SHIFT_MANTISSA":{"details":"Amount of bits to shift to mantissa field"}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"stateVariables\":{\"BWAD_SHIFT\":{\"details\":\"We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\"},\"SHIFT_MANTISSA\":{\"details\":\"Amount of bits to shift to mantissa field\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"notice\":\"# Number Library for compact representation of uint256 numbers. - Number is stored using mantissa and exponent, each occupying 8 bits. - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`. - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent` \u003e - `0 \u003c= mantissa \u003c 256` \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256) # Number stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | | ---------- | -------- | ----- | ----- | | (002..001] | mantissa | uint8 | 1 | | (001..000] | exponent | uint8 | 1 |\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"NumberLib\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:Ownable2StepUpgradeable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"details":"Contract module which provides access control mechanism, where there is an account (an owner) that can be granted exclusive access to specific functions. By default, the owner account will be the one that deploys the contract. This can later be changed with {transferOwnership} and {acceptOwnership}. This module is used through inheritance. It will make available all functions from parent (Ownable).","kind":"dev","methods":{"acceptOwnership()":{"details":"The new owner accepts the ownership transfer."},"owner()":{"details":"Returns the address of the current owner."},"pendingOwner()":{"details":"Returns the address of the pending owner."},"renounceOwnership()":{"details":"Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner."},"transferOwnership(address)":{"details":"Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. Can only be called by the current owner."}},"stateVariables":{"__gap":{"details":"This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain. See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps"}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"version\",\"type\":\"uint8\"}],\"name\":\"Initialized\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferStarted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"acceptOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"pendingOwner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Contract module which provides access control mechanism, where there is an account (an owner) that can be granted exclusive access to specific functions. By default, the owner account will be the one that deploys the contract. This can later be changed with {transferOwnership} and {acceptOwnership}. This module is used through inheritance. It will make available all functions from parent (Ownable).\",\"kind\":\"dev\",\"methods\":{\"acceptOwnership()\":{\"details\":\"The new owner accepts the ownership transfer.\"},\"owner()\":{\"details\":\"Returns the address of the current owner.\"},\"pendingOwner()\":{\"details\":\"Returns the address of the pending owner.\"},\"renounceOwnership()\":{\"details\":\"Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner.\"},\"transferOwnership(address)\":{\"details\":\"Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. Can only be called by the current owner.\"}},\"stateVariables\":{\"__gap\":{\"details\":\"This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain. See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"Ownable2StepUpgradeable\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{"acceptOwnership()":"79ba5097","owner()":"8da5cb5b","pendingOwner()":"e30c3978","renounceOwnership()":"715018a6","transferOwnership(address)":"f2fde38b"}},"solidity/GasOracle.sol:OwnableUpgradeable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"details":"Contract module which provides a basic access control mechanism, where there is an account (an owner) that can be granted exclusive access to specific functions. By default, the owner account will be the one that deploys the contract. This can later be changed with {transferOwnership}. This module is used through inheritance. It will make available the modifier `onlyOwner`, which can be applied to your functions to restrict their use to the owner.","kind":"dev","methods":{"owner()":{"details":"Returns the address of the current owner."},"renounceOwnership()":{"details":"Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner."},"transferOwnership(address)":{"details":"Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner."}},"stateVariables":{"__gap":{"details":"This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain. See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps"}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"version\",\"type\":\"uint8\"}],\"name\":\"Initialized\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Contract module which provides a basic access control mechanism, where there is an account (an owner) that can be granted exclusive access to specific functions. By default, the owner account will be the one that deploys the contract. This can later be changed with {transferOwnership}. This module is used through inheritance. It will make available the modifier `onlyOwner`, which can be applied to your functions to restrict their use to the owner.\",\"kind\":\"dev\",\"methods\":{\"owner()\":{\"details\":\"Returns the address of the current owner.\"},\"renounceOwnership()\":{\"details\":\"Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner.\"},\"transferOwnership(address)\":{\"details\":\"Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner.\"}},\"stateVariables\":{\"__gap\":{\"details\":\"This empty reserved space is put in place to allow future versions to add new variables without shifting down storage in the inheritance chain. See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"OwnableUpgradeable\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{"owner()":"8da5cb5b","renounceOwnership()":"715018a6","transferOwnership(address)":"f2fde38b"}},"solidity/GasOracle.sol:RequestLib":{"code":"0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220234a1fe067901baa5364d313783640cb5d207d99c36bb76b889c67db363a786d64736f6c63430008110033","runtime-code":"0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220234a1fe067901baa5364d313783640cb5d207d99c36bb76b889c67db363a786d64736f6c63430008110033","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"18418:2478:0:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;18418:2478:0;;;;;;;;;;;;;;;;;","srcMapRuntime":"18418:2478:0:-:0;;;;;;;;","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"notice":"Library for formatting _the request part_ of _the base messages_. - Request represents a message sender requirements for the message execution on the destination chain. - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory. \u003e gasDrop field is included for future compatibility and is ignored at the moment. # Request stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | Description | | ---------- | -------- | ------ | ----- | ---------------------------------------------------- | | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient | | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution | | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |","version":1},"developerDoc":{"kind":"dev","methods":{},"stateVariables":{"SHIFT_GAS_DROP":{"details":"Amount of bits to shift to gasDrop field"},"SHIFT_GAS_LIMIT":{"details":"Amount of bits to shift to gasLimit field"}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"stateVariables\":{\"SHIFT_GAS_DROP\":{\"details\":\"Amount of bits to shift to gasDrop field\"},\"SHIFT_GAS_LIMIT\":{\"details\":\"Amount of bits to shift to gasLimit field\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"notice\":\"Library for formatting _the request part_ of _the base messages_. - Request represents a message sender requirements for the message execution on the destination chain. - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory. \u003e gasDrop field is included for future compatibility and is ignored at the moment. # Request stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | Description | | ---------- | -------- | ------ | ----- | ---------------------------------------------------- | | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient | | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution | | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"RequestLib\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:SafeCast":{"code":"0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212203eedf4d2db77d749a4a82ce2a93d8b9db4b643da11efa606f6f511a749e1f76464736f6c63430008110033","runtime-code":"0x73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212203eedf4d2db77d749a4a82ce2a93d8b9db4b643da11efa606f6f511a749e1f76464736f6c63430008110033","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"21833:34153:0:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;21833:34153:0;;;;;;;;;;;;;;;;;","srcMapRuntime":"21833:34153:0:-:0;;;;;;;;","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"details":"Wrappers over Solidity's uintXX/intXX casting operators with added overflow checks. Downcasting from uint256/int256 in Solidity does not revert on overflow. This can easily result in undesired exploitation or bugs, since developers usually assume that overflows raise errors. `SafeCast` restores this intuition by reverting the transaction when such an operation overflows. Using this library instead of the unchecked operations eliminates an entire class of bugs, so it's recommended to use it always. Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing all math on `uint256` and `int256` and then downcasting.","kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Wrappers over Solidity's uintXX/intXX casting operators with added overflow checks. Downcasting from uint256/int256 in Solidity does not revert on overflow. This can easily result in undesired exploitation or bugs, since developers usually assume that overflows raise errors. `SafeCast` restores this intuition by reverting the transaction when such an operation overflows. Using this library instead of the unchecked operations eliminates an entire class of bugs, so it's recommended to use it always. Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing all math on `uint256` and `int256` and then downcasting.\",\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"SafeCast\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:TipsLib":{"code":"0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212202ca0dd53e23ad214dc8e9c14a95673a2a253c41e5cf286527f81076bde26ba4a64736f6c63430008110033","runtime-code":"0x73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212202ca0dd53e23ad214dc8e9c14a95673a2a253c41e5cf286527f81076bde26ba4a64736f6c63430008110033","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"94925:6743:0:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;94925:6743:0;;;;;;;;;;;;;;;;;","srcMapRuntime":"94925:6743:0:-:0;;;;;;;;","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"notice":"# Tips Library for formatting _the tips part_ of _the base messages_. ## How the tips are awarded Tips are paid for sending a base message, and are split across all the agents that made the message execution on destination chain possible. ### Summit tips Split between: - Guard posting a snapshot with state ST_G for the origin chain. - Notary posting a snapshot SN_N using ST_G. This creates attestation A. - Notary posting a message receipt after it is executed on destination chain. ### Attestation tips Paid to: - Notary posting attestation A to destination chain. ### Execution tips Paid to: - First executor performing a valid execution attempt (correct proofs, optimistic period over), using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not. ### Delivery tips. Paid to: - Executor who successfully executed the message on destination chain. ## Tips encoding - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory. - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32. - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category. \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for the chains with the most expensive gas currency. # Tips stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | Description | | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- | | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract | | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract | | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain | | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |","version":1},"developerDoc":{"kind":"dev","methods":{},"stateVariables":{"SHIFT_ATTESTATION_TIP":{"details":"Amount of bits to shift to attestationTip field"},"SHIFT_EXECUTION_TIP":{"details":"Amount of bits to shift to executionTip field"},"SHIFT_SUMMIT_TIP":{"details":"Amount of bits to shift to summitTip field"}},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"stateVariables\":{\"SHIFT_ATTESTATION_TIP\":{\"details\":\"Amount of bits to shift to attestationTip field\"},\"SHIFT_EXECUTION_TIP\":{\"details\":\"Amount of bits to shift to executionTip field\"},\"SHIFT_SUMMIT_TIP\":{\"details\":\"Amount of bits to shift to summitTip field\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"notice\":\"# Tips Library for formatting _the tips part_ of _the base messages_. ## How the tips are awarded Tips are paid for sending a base message, and are split across all the agents that made the message execution on destination chain possible. ### Summit tips Split between: - Guard posting a snapshot with state ST_G for the origin chain. - Notary posting a snapshot SN_N using ST_G. This creates attestation A. - Notary posting a message receipt after it is executed on destination chain. ### Attestation tips Paid to: - Notary posting attestation A to destination chain. ### Execution tips Paid to: - First executor performing a valid execution attempt (correct proofs, optimistic period over), using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not. ### Delivery tips. Paid to: - Executor who successfully executed the message on destination chain. ## Tips encoding - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory. - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32. - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category. \u003e The only downside is that the \\\"real tip values\\\" are now multiplies of ~4*10**9, which should be fine even for the chains with the most expensive gas currency. # Tips stack layout (from highest bits to lowest) | Position | Field | Type | Bytes | Description | | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- | | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract | | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract | | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain | | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"TipsLib\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{}},"solidity/GasOracle.sol:Versioned":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\npragma solidity =0.8.17 ^0.8.0 ^0.8.1 ^0.8.2;\n\n// contracts/events/GasOracleEvents.sol\n\n/// @notice A collection of events emitted by the GasOracle contract\nabstract contract GasOracleEvents {\n /**\n * @notice Emitted when gas data is updated for the domain\n * @param domain Domain of chain the gas data is for\n * @param paddedGasData Padded encoded gas data\n */\n event GasDataUpdated(uint32 domain, uint256 paddedGasData);\n\n /**\n * @notice Emitted when the value of the summit tip is updated\n * @param summitTipWei The new value of the summit tip in Mainnet wei\n */\n event SummitTipUpdated(uint256 summitTipWei);\n}\n\n// contracts/interfaces/InterfaceGasOracle.sol\n\ninterface InterfaceGasOracle {\n /**\n * @notice Fetches the latest gas data for the chain from `Destination` contract,\n * and uses it to update the oracle values for the requested chain.\n * @param domain Domain to update the gas data for\n */\n function updateGasData(uint32 domain) external;\n\n /**\n * @notice Returns the gas data for the local chain.\n */\n function getGasData() external view returns (uint256 paddedGasData);\n\n /**\n * @notice Returns the gas data for the given domain, in the decoded format.\n * @param domain Domain of chain to get gas data for\n * @return gasPrice Gas price for the chain (in Wei per gas unit)\n * @return dataPrice Calldata price (in Wei per byte of content)\n * @return execBuffer Tx fee safety buffer for message execution (in Wei)\n * @return amortAttCost Amortized cost for attestation submission (in Wei)\n * @return etherPrice Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n * @return markup Markup for the message execution (in BWAD)\n */\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n );\n\n /**\n * @notice Returns the minimum tips for sending a message to a given destination.\n * @param destination Domain of destination chain\n * @param paddedRequest Padded encoded message execution request on destination chain\n * @param contentLength The length of the message content\n * @return paddedTips Padded encoded minimum tips information\n */\n function getMinimumTips(uint32 destination, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips);\n}\n\n// contracts/libs/Constants.sol\n\n// Here we define common constants to enable their easier reusing later.\n\n// ══════════════════════════════════ MERKLE ═══════════════════════════════════\n/// @dev Height of the Agent Merkle Tree\nuint256 constant AGENT_TREE_HEIGHT = 32;\n/// @dev Height of the Origin Merkle Tree\nuint256 constant ORIGIN_TREE_HEIGHT = 32;\n/// @dev Height of the Snapshot Merkle Tree. Allows up to 64 leafs, e.g. up to 32 states\nuint256 constant SNAPSHOT_TREE_HEIGHT = 6;\n// ══════════════════════════════════ STRUCTS ══════════════════════════════════\n/// @dev See Attestation.sol: (bytes32,bytes32,uint32,uint40,uint40): 32+32+4+5+5\nuint256 constant ATTESTATION_LENGTH = 78;\n/// @dev See GasData.sol: (uint16,uint16,uint16,uint16,uint16,uint16): 2+2+2+2+2+2\nuint256 constant GAS_DATA_LENGTH = 12;\n/// @dev See Receipt.sol: (uint32,uint32,bytes32,bytes32,uint8,address,address,address): 4+4+32+32+1+20+20+20\nuint256 constant RECEIPT_LENGTH = 133;\n/// @dev See State.sol: (bytes32,uint32,uint32,uint40,uint40,GasData): 32+4+4+5+5+len(GasData)\nuint256 constant STATE_LENGTH = 50 + GAS_DATA_LENGTH;\n/// @dev Maximum amount of states in a single snapshot. Each state produces two leafs in the tree\nuint256 constant SNAPSHOT_MAX_STATES = 1 \u003c\u003c (SNAPSHOT_TREE_HEIGHT - 1);\n// ══════════════════════════════════ MESSAGE ══════════════════════════════════\n/// @dev See Header.sol: (uint8,uint32,uint32,uint32,uint32): 1+4+4+4+4\nuint256 constant HEADER_LENGTH = 17;\n/// @dev See Request.sol: (uint96,uint64,uint32): 12+8+4\nuint256 constant REQUEST_LENGTH = 24;\n/// @dev See Tips.sol: (uint64,uint64,uint64,uint64): 8+8+8+8\nuint256 constant TIPS_LENGTH = 32;\n/// @dev The amount of discarded last bits when encoding tip values\nuint256 constant TIPS_GRANULARITY = 32;\n/// @dev Tip values could be only the multiples of TIPS_MULTIPLIER\nuint256 constant TIPS_MULTIPLIER = 1 \u003c\u003c TIPS_GRANULARITY;\n// ══════════════════════════════ STATEMENT SALTS ══════════════════════════════\n/// @dev Salts for signing various statements\nbytes32 constant ATTESTATION_VALID_SALT = keccak256(\"ATTESTATION_VALID_SALT\");\nbytes32 constant ATTESTATION_INVALID_SALT = keccak256(\"ATTESTATION_INVALID_SALT\");\nbytes32 constant RECEIPT_VALID_SALT = keccak256(\"RECEIPT_VALID_SALT\");\nbytes32 constant RECEIPT_INVALID_SALT = keccak256(\"RECEIPT_INVALID_SALT\");\nbytes32 constant SNAPSHOT_VALID_SALT = keccak256(\"SNAPSHOT_VALID_SALT\");\nbytes32 constant STATE_INVALID_SALT = keccak256(\"STATE_INVALID_SALT\");\n// ═════════════════════════════════ PROTOCOL ══════════════════════════════════\n/// @dev Optimistic period for new agent roots in LightManager\nuint32 constant AGENT_ROOT_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Timeout between the agent root could be proposed and resolved in LightManager\nuint32 constant AGENT_ROOT_PROPOSAL_TIMEOUT = 12 hours;\nuint32 constant BONDING_OPTIMISTIC_PERIOD = 1 days;\n/// @dev Amount of time that the Notary will not be considered active after they won a dispute\nuint32 constant DISPUTE_TIMEOUT_NOTARY = 12 hours;\n/// @dev Amount of time without fresh data from Notaries before contract owner can resolve stuck disputes manually\nuint256 constant FRESH_DATA_TIMEOUT = 4 hours;\n/// @dev Maximum bytes per message = 2 KiB (somewhat arbitrarily set to begin)\nuint256 constant MAX_CONTENT_BYTES = 2 * 2 ** 10;\n/// @dev Maximum value for the summit tip that could be set in GasOracle\nuint256 constant MAX_SUMMIT_TIP = 0.01 ether;\n\n// contracts/libs/Errors.sol\n\n// ══════════════════════════════ INVALID CALLER ═══════════════════════════════\n\nerror CallerNotAgentManager();\nerror CallerNotDestination();\nerror CallerNotInbox();\nerror CallerNotSummit();\n\n// ══════════════════════════════ INCORRECT DATA ═══════════════════════════════\n\nerror IncorrectAttestation();\nerror IncorrectAgentDomain();\nerror IncorrectAgentIndex();\nerror IncorrectAgentProof();\nerror IncorrectAgentRoot();\nerror IncorrectDataHash();\nerror IncorrectDestinationDomain();\nerror IncorrectOriginDomain();\nerror IncorrectSnapshotProof();\nerror IncorrectSnapshotRoot();\nerror IncorrectState();\nerror IncorrectStatesAmount();\nerror IncorrectTipsProof();\nerror IncorrectVersionLength();\n\nerror IncorrectNonce();\nerror IncorrectSender();\nerror IncorrectRecipient();\n\nerror FlagOutOfRange();\nerror IndexOutOfRange();\nerror NonceOutOfRange();\n\nerror OutdatedNonce();\n\nerror UnformattedAttestation();\nerror UnformattedAttestationReport();\nerror UnformattedBaseMessage();\nerror UnformattedCallData();\nerror UnformattedCallDataPrefix();\nerror UnformattedMessage();\nerror UnformattedReceipt();\nerror UnformattedReceiptReport();\nerror UnformattedSignature();\nerror UnformattedSnapshot();\nerror UnformattedState();\nerror UnformattedStateReport();\n\n// ═══════════════════════════════ MERKLE TREES ════════════════════════════════\n\nerror LeafNotProven();\nerror MerkleTreeFull();\nerror NotEnoughLeafs();\nerror TreeHeightTooLow();\n\n// ═════════════════════════════ OPTIMISTIC PERIOD ═════════════════════════════\n\nerror BaseClientOptimisticPeriod();\nerror MessageOptimisticPeriod();\nerror SlashAgentOptimisticPeriod();\nerror WithdrawTipsOptimisticPeriod();\nerror ZeroProofMaturity();\n\n// ═══════════════════════════════ AGENT MANAGER ═══════════════════════════════\n\nerror AgentNotGuard();\nerror AgentNotNotary();\n\nerror AgentCantBeAdded();\nerror AgentNotActive();\nerror AgentNotActiveNorUnstaking();\nerror AgentNotFraudulent();\nerror AgentNotUnstaking();\nerror AgentUnknown();\n\nerror AgentRootNotProposed();\nerror AgentRootTimeoutNotOver();\n\nerror NotStuck();\n\nerror DisputeAlreadyResolved();\nerror DisputeNotOpened();\nerror DisputeTimeoutNotOver();\nerror GuardInDispute();\nerror NotaryInDispute();\n\nerror MustBeSynapseDomain();\nerror SynapseDomainForbidden();\n\n// ════════════════════════════════ DESTINATION ════════════════════════════════\n\nerror AlreadyExecuted();\nerror AlreadyFailed();\nerror DuplicatedSnapshotRoot();\nerror IncorrectMagicValue();\nerror GasLimitTooLow();\nerror GasSuppliedTooLow();\n\n// ══════════════════════════════════ ORIGIN ═══════════════════════════════════\n\nerror ContentLengthTooBig();\nerror EthTransferFailed();\nerror InsufficientEthBalance();\n\n// ════════════════════════════════ GAS ORACLE ═════════════════════════════════\n\nerror LocalGasDataNotSet();\nerror RemoteGasDataNotSet();\n\n// ═══════════════════════════════════ TIPS ════════════════════════════════════\n\nerror SummitTipTooHigh();\nerror TipsClaimMoreThanEarned();\nerror TipsClaimZero();\nerror TipsOverflow();\nerror TipsValueTooLow();\n\n// ════════════════════════════════ MEMORY VIEW ════════════════════════════════\n\nerror IndexedTooMuch();\nerror ViewOverrun();\nerror OccupiedMemory();\nerror UnallocatedMemory();\nerror PrecompileOutOfGas();\n\n// ═════════════════════════════════ MULTICALL ═════════════════════════════════\n\nerror MulticallFailed();\n\n// contracts/libs/stack/Number.sol\n\n/// Number is a compact representation of uint256, that is fit into 16 bits\n/// with the maximum relative error under 0.4%.\ntype Number is uint16;\n\nusing NumberLib for Number global;\n\n/// # Number\n/// Library for compact representation of uint256 numbers.\n/// - Number is stored using mantissa and exponent, each occupying 8 bits.\n/// - Numbers under 2**8 are stored as `mantissa` with `exponent = 0xFF`.\n/// - Numbers at least 2**8 are approximated as `(256 + mantissa) \u003c\u003c exponent`\n/// \u003e - `0 \u003c= mantissa \u003c 256`\n/// \u003e - `0 \u003c= exponent \u003c= 247` (`256 * 2**248` doesn't fit into uint256)\n/// # Number stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes |\n/// | ---------- | -------- | ----- | ----- |\n/// | (002..001] | mantissa | uint8 | 1 |\n/// | (001..000] | exponent | uint8 | 1 |\n\nlibrary NumberLib {\n /// @dev Amount of bits to shift to mantissa field\n uint16 private constant SHIFT_MANTISSA = 8;\n\n /// @notice For bwad math (binary wad) we use 2**64 as \"wad\" unit.\n /// @dev We are using not using 10**18 as wad, because it is not stored precisely in NumberLib.\n uint256 internal constant BWAD_SHIFT = 64;\n uint256 internal constant BWAD = 1 \u003c\u003c BWAD_SHIFT;\n /// @notice ~0.1% in bwad units.\n uint256 internal constant PER_MILLE_SHIFT = BWAD_SHIFT - 10;\n uint256 internal constant PER_MILLE = 1 \u003c\u003c PER_MILLE_SHIFT;\n\n /// @notice Compresses uint256 number into 16 bits.\n function compress(uint256 value) internal pure returns (Number) {\n // Find `msb` such as `2**msb \u003c= value \u003c 2**(msb + 1)`\n uint256 msb = mostSignificantBit(value);\n // We want to preserve 9 bits of precision.\n // The highest bit is always 1, so we can skip it.\n // The remaining 8 highest bits are stored as mantissa.\n if (msb \u003c 8) {\n // Value is less than 2**8, so we can use value as mantissa with \"-1\" exponent.\n return _encode(uint8(value), 0xFF);\n } else {\n // We use `msb - 8` as exponent otherwise. Note that `exponent \u003e= 0`.\n unchecked {\n uint256 exponent = msb - 8;\n // Shifting right by `msb-8` bits will shift the \"remaining 8 highest bits\" into the 8 lowest bits.\n // uint8() will truncate the highest bit.\n return _encode(uint8(value \u003e\u003e exponent), uint8(exponent));\n }\n }\n }\n\n /// @notice Decompresses 16 bits number into uint256.\n /// @dev The outcome is an approximation of the original number: `(value - value / 256) \u003c number \u003c= value`.\n function decompress(Number number) internal pure returns (uint256 value) {\n // Isolate 8 highest bits as the mantissa.\n uint256 mantissa = Number.unwrap(number) \u003e\u003e SHIFT_MANTISSA;\n // This will truncate the highest bits, leaving only the exponent.\n uint256 exponent = uint8(Number.unwrap(number));\n if (exponent == 0xFF) {\n return mantissa;\n } else {\n unchecked {\n return (256 + mantissa) \u003c\u003c (exponent);\n }\n }\n }\n\n /// @dev Returns the most significant bit of `x`\n /// https://solidity-by-example.org/bitwise/\n function mostSignificantBit(uint256 x) internal pure returns (uint256 msb) {\n // To find `msb` we determine it bit by bit, starting from the highest one.\n // `0 \u003c= msb \u003c= 255`, so we start from the highest bit, 1\u003c\u003c7 == 128.\n // If `x` is at least 2**128, then the highest bit of `x` is at least 128.\n // solhint-disable no-inline-assembly\n assembly {\n // `f` is set to 1\u003c\u003c7 if `x \u003e= 2**128` and to 0 otherwise.\n let f := shl(7, gt(x, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))\n // If `x \u003e= 2**128` then set `msb` highest bit to 1 and shift `x` right by 128.\n // Otherwise, `msb` remains 0 and `x` remains unchanged.\n x := shr(f, x)\n msb := or(msb, f)\n }\n // `x` is now at most 2**128 - 1. Continue the same way, the next highest bit is 1\u003c\u003c6 == 64.\n assembly {\n // `f` is set to 1\u003c\u003c6 if `x \u003e= 2**64` and to 0 otherwise.\n let f := shl(6, gt(x, 0xFFFFFFFFFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c5 if `x \u003e= 2**32` and to 0 otherwise.\n let f := shl(5, gt(x, 0xFFFFFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c4 if `x \u003e= 2**16` and to 0 otherwise.\n let f := shl(4, gt(x, 0xFFFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c3 if `x \u003e= 2**8` and to 0 otherwise.\n let f := shl(3, gt(x, 0xFF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c2 if `x \u003e= 2**4` and to 0 otherwise.\n let f := shl(2, gt(x, 0xF))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1\u003c\u003c1 if `x \u003e= 2**2` and to 0 otherwise.\n let f := shl(1, gt(x, 0x3))\n x := shr(f, x)\n msb := or(msb, f)\n }\n assembly {\n // `f` is set to 1 if `x \u003e= 2**1` and to 0 otherwise.\n let f := gt(x, 0x1)\n msb := or(msb, f)\n }\n }\n\n /// @dev Wraps (mantissa, exponent) pair into Number.\n function _encode(uint8 mantissa, uint8 exponent) private pure returns (Number) {\n // Casts below are upcasts, so they are safe.\n return Number.wrap(uint16(mantissa) \u003c\u003c SHIFT_MANTISSA | uint16(exponent));\n }\n}\n\n// contracts/libs/stack/Request.sol\n\n/// Request is encoded data with \"message execution request\".\ntype Request is uint192;\n\nusing RequestLib for Request global;\n\n/// Library for formatting _the request part_ of _the base messages_.\n/// - Request represents a message sender requirements for the message execution on the destination chain.\n/// - Request occupies a single storage word, and thus is stored on stack instead of being stored in memory.\n/// \u003e gasDrop field is included for future compatibility and is ignored at the moment.\n///\n/// # Request stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------- | ------ | ----- | ---------------------------------------------------- |\n/// | (024..012] | gasDrop | uint96 | 12 | Minimum amount of gas token to drop to the recipient |\n/// | (012..004] | gasLimit | uint64 | 8 | Minimum amount of gas units to supply for execution |\n/// | (004..000] | version | uint32 | 4 | Base message version to pass to the recipient |\n\nlibrary RequestLib {\n /// @dev Amount of bits to shift to gasDrop field\n uint192 private constant SHIFT_GAS_DROP = 12 * 8;\n /// @dev Amount of bits to shift to gasLimit field\n uint192 private constant SHIFT_GAS_LIMIT = 4 * 8;\n\n /// @notice Returns an encoded request with the given fields\n /// @param gasDrop_ Minimum amount of gas token to drop to the recipient (ignored at the moment)\n /// @param gasLimit_ Minimum amount of gas units to supply for execution\n /// @param version_ Base message version to pass to the recipient\n function encodeRequest(uint96 gasDrop_, uint64 gasLimit_, uint32 version_) internal pure returns (Request) {\n // Casts below are upcasts, so they are safe\n return Request.wrap(uint192(gasDrop_) \u003c\u003c SHIFT_GAS_DROP | uint192(gasLimit_) \u003c\u003c SHIFT_GAS_LIMIT | version_);\n }\n\n /// @notice Wraps the padded encoded request into a Request-typed value.\n /// @dev The \"padded\" request is simply an encoded request casted to uint256 (highest bits are set to zero).\n /// Casting to uint256 is done automatically in Solidity, so no extra actions from consumers are needed.\n /// The highest bits are discarded, so that the contracts dealing with encoded requests\n /// don't need to be updated, if a new field is added.\n function wrapPadded(uint256 paddedRequest) internal pure returns (Request) {\n // Casting to uint192 will truncate the highest bits, which is the behavior we want\n return Request.wrap(uint192(paddedRequest));\n }\n\n /// @notice Returns the requested of gas token to drop to the recipient.\n function gasDrop(Request request) internal pure returns (uint96) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return uint96(Request.unwrap(request) \u003e\u003e SHIFT_GAS_DROP);\n }\n\n /// @notice Returns the requested minimum amount of gas units to supply for execution.\n function gasLimit(Request request) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Request.unwrap(request) \u003e\u003e SHIFT_GAS_LIMIT);\n }\n\n /// @notice Returns the requested base message version to pass to the recipient.\n function version(Request request) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(Request.unwrap(request));\n }\n}\n\n// node_modules/@openzeppelin/contracts/utils/math/SafeCast.sol\n\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)\n// This file was procedurally generated from scripts/generate/templates/SafeCast.js.\n\n/**\n * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow\n * checks.\n *\n * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can\n * easily result in undesired exploitation or bugs, since developers usually\n * assume that overflows raise errors. `SafeCast` restores this intuition by\n * reverting the transaction when such an operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n *\n * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing\n * all math on `uint256` and `int256` and then downcasting.\n */\nlibrary SafeCast {\n /**\n * @dev Returns the downcasted uint248 from uint256, reverting on\n * overflow (when the input is greater than largest uint248).\n *\n * Counterpart to Solidity's `uint248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toUint248(uint256 value) internal pure returns (uint248) {\n require(value \u003c= type(uint248).max, \"SafeCast: value doesn't fit in 248 bits\");\n return uint248(value);\n }\n\n /**\n * @dev Returns the downcasted uint240 from uint256, reverting on\n * overflow (when the input is greater than largest uint240).\n *\n * Counterpart to Solidity's `uint240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toUint240(uint256 value) internal pure returns (uint240) {\n require(value \u003c= type(uint240).max, \"SafeCast: value doesn't fit in 240 bits\");\n return uint240(value);\n }\n\n /**\n * @dev Returns the downcasted uint232 from uint256, reverting on\n * overflow (when the input is greater than largest uint232).\n *\n * Counterpart to Solidity's `uint232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toUint232(uint256 value) internal pure returns (uint232) {\n require(value \u003c= type(uint232).max, \"SafeCast: value doesn't fit in 232 bits\");\n return uint232(value);\n }\n\n /**\n * @dev Returns the downcasted uint224 from uint256, reverting on\n * overflow (when the input is greater than largest uint224).\n *\n * Counterpart to Solidity's `uint224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.2._\n */\n function toUint224(uint256 value) internal pure returns (uint224) {\n require(value \u003c= type(uint224).max, \"SafeCast: value doesn't fit in 224 bits\");\n return uint224(value);\n }\n\n /**\n * @dev Returns the downcasted uint216 from uint256, reverting on\n * overflow (when the input is greater than largest uint216).\n *\n * Counterpart to Solidity's `uint216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toUint216(uint256 value) internal pure returns (uint216) {\n require(value \u003c= type(uint216).max, \"SafeCast: value doesn't fit in 216 bits\");\n return uint216(value);\n }\n\n /**\n * @dev Returns the downcasted uint208 from uint256, reverting on\n * overflow (when the input is greater than largest uint208).\n *\n * Counterpart to Solidity's `uint208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toUint208(uint256 value) internal pure returns (uint208) {\n require(value \u003c= type(uint208).max, \"SafeCast: value doesn't fit in 208 bits\");\n return uint208(value);\n }\n\n /**\n * @dev Returns the downcasted uint200 from uint256, reverting on\n * overflow (when the input is greater than largest uint200).\n *\n * Counterpart to Solidity's `uint200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toUint200(uint256 value) internal pure returns (uint200) {\n require(value \u003c= type(uint200).max, \"SafeCast: value doesn't fit in 200 bits\");\n return uint200(value);\n }\n\n /**\n * @dev Returns the downcasted uint192 from uint256, reverting on\n * overflow (when the input is greater than largest uint192).\n *\n * Counterpart to Solidity's `uint192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toUint192(uint256 value) internal pure returns (uint192) {\n require(value \u003c= type(uint192).max, \"SafeCast: value doesn't fit in 192 bits\");\n return uint192(value);\n }\n\n /**\n * @dev Returns the downcasted uint184 from uint256, reverting on\n * overflow (when the input is greater than largest uint184).\n *\n * Counterpart to Solidity's `uint184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toUint184(uint256 value) internal pure returns (uint184) {\n require(value \u003c= type(uint184).max, \"SafeCast: value doesn't fit in 184 bits\");\n return uint184(value);\n }\n\n /**\n * @dev Returns the downcasted uint176 from uint256, reverting on\n * overflow (when the input is greater than largest uint176).\n *\n * Counterpart to Solidity's `uint176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toUint176(uint256 value) internal pure returns (uint176) {\n require(value \u003c= type(uint176).max, \"SafeCast: value doesn't fit in 176 bits\");\n return uint176(value);\n }\n\n /**\n * @dev Returns the downcasted uint168 from uint256, reverting on\n * overflow (when the input is greater than largest uint168).\n *\n * Counterpart to Solidity's `uint168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toUint168(uint256 value) internal pure returns (uint168) {\n require(value \u003c= type(uint168).max, \"SafeCast: value doesn't fit in 168 bits\");\n return uint168(value);\n }\n\n /**\n * @dev Returns the downcasted uint160 from uint256, reverting on\n * overflow (when the input is greater than largest uint160).\n *\n * Counterpart to Solidity's `uint160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toUint160(uint256 value) internal pure returns (uint160) {\n require(value \u003c= type(uint160).max, \"SafeCast: value doesn't fit in 160 bits\");\n return uint160(value);\n }\n\n /**\n * @dev Returns the downcasted uint152 from uint256, reverting on\n * overflow (when the input is greater than largest uint152).\n *\n * Counterpart to Solidity's `uint152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toUint152(uint256 value) internal pure returns (uint152) {\n require(value \u003c= type(uint152).max, \"SafeCast: value doesn't fit in 152 bits\");\n return uint152(value);\n }\n\n /**\n * @dev Returns the downcasted uint144 from uint256, reverting on\n * overflow (when the input is greater than largest uint144).\n *\n * Counterpart to Solidity's `uint144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toUint144(uint256 value) internal pure returns (uint144) {\n require(value \u003c= type(uint144).max, \"SafeCast: value doesn't fit in 144 bits\");\n return uint144(value);\n }\n\n /**\n * @dev Returns the downcasted uint136 from uint256, reverting on\n * overflow (when the input is greater than largest uint136).\n *\n * Counterpart to Solidity's `uint136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toUint136(uint256 value) internal pure returns (uint136) {\n require(value \u003c= type(uint136).max, \"SafeCast: value doesn't fit in 136 bits\");\n return uint136(value);\n }\n\n /**\n * @dev Returns the downcasted uint128 from uint256, reverting on\n * overflow (when the input is greater than largest uint128).\n *\n * Counterpart to Solidity's `uint128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v2.5._\n */\n function toUint128(uint256 value) internal pure returns (uint128) {\n require(value \u003c= type(uint128).max, \"SafeCast: value doesn't fit in 128 bits\");\n return uint128(value);\n }\n\n /**\n * @dev Returns the downcasted uint120 from uint256, reverting on\n * overflow (when the input is greater than largest uint120).\n *\n * Counterpart to Solidity's `uint120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toUint120(uint256 value) internal pure returns (uint120) {\n require(value \u003c= type(uint120).max, \"SafeCast: value doesn't fit in 120 bits\");\n return uint120(value);\n }\n\n /**\n * @dev Returns the downcasted uint112 from uint256, reverting on\n * overflow (when the input is greater than largest uint112).\n *\n * Counterpart to Solidity's `uint112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toUint112(uint256 value) internal pure returns (uint112) {\n require(value \u003c= type(uint112).max, \"SafeCast: value doesn't fit in 112 bits\");\n return uint112(value);\n }\n\n /**\n * @dev Returns the downcasted uint104 from uint256, reverting on\n * overflow (when the input is greater than largest uint104).\n *\n * Counterpart to Solidity's `uint104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toUint104(uint256 value) internal pure returns (uint104) {\n require(value \u003c= type(uint104).max, \"SafeCast: value doesn't fit in 104 bits\");\n return uint104(value);\n }\n\n /**\n * @dev Returns the downcasted uint96 from uint256, reverting on\n * overflow (when the input is greater than largest uint96).\n *\n * Counterpart to Solidity's `uint96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.2._\n */\n function toUint96(uint256 value) internal pure returns (uint96) {\n require(value \u003c= type(uint96).max, \"SafeCast: value doesn't fit in 96 bits\");\n return uint96(value);\n }\n\n /**\n * @dev Returns the downcasted uint88 from uint256, reverting on\n * overflow (when the input is greater than largest uint88).\n *\n * Counterpart to Solidity's `uint88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toUint88(uint256 value) internal pure returns (uint88) {\n require(value \u003c= type(uint88).max, \"SafeCast: value doesn't fit in 88 bits\");\n return uint88(value);\n }\n\n /**\n * @dev Returns the downcasted uint80 from uint256, reverting on\n * overflow (when the input is greater than largest uint80).\n *\n * Counterpart to Solidity's `uint80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toUint80(uint256 value) internal pure returns (uint80) {\n require(value \u003c= type(uint80).max, \"SafeCast: value doesn't fit in 80 bits\");\n return uint80(value);\n }\n\n /**\n * @dev Returns the downcasted uint72 from uint256, reverting on\n * overflow (when the input is greater than largest uint72).\n *\n * Counterpart to Solidity's `uint72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toUint72(uint256 value) internal pure returns (uint72) {\n require(value \u003c= type(uint72).max, \"SafeCast: value doesn't fit in 72 bits\");\n return uint72(value);\n }\n\n /**\n * @dev Returns the downcasted uint64 from uint256, reverting on\n * overflow (when the input is greater than largest uint64).\n *\n * Counterpart to Solidity's `uint64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v2.5._\n */\n function toUint64(uint256 value) internal pure returns (uint64) {\n require(value \u003c= type(uint64).max, \"SafeCast: value doesn't fit in 64 bits\");\n return uint64(value);\n }\n\n /**\n * @dev Returns the downcasted uint56 from uint256, reverting on\n * overflow (when the input is greater than largest uint56).\n *\n * Counterpart to Solidity's `uint56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toUint56(uint256 value) internal pure returns (uint56) {\n require(value \u003c= type(uint56).max, \"SafeCast: value doesn't fit in 56 bits\");\n return uint56(value);\n }\n\n /**\n * @dev Returns the downcasted uint48 from uint256, reverting on\n * overflow (when the input is greater than largest uint48).\n *\n * Counterpart to Solidity's `uint48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toUint48(uint256 value) internal pure returns (uint48) {\n require(value \u003c= type(uint48).max, \"SafeCast: value doesn't fit in 48 bits\");\n return uint48(value);\n }\n\n /**\n * @dev Returns the downcasted uint40 from uint256, reverting on\n * overflow (when the input is greater than largest uint40).\n *\n * Counterpart to Solidity's `uint40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toUint40(uint256 value) internal pure returns (uint40) {\n require(value \u003c= type(uint40).max, \"SafeCast: value doesn't fit in 40 bits\");\n return uint40(value);\n }\n\n /**\n * @dev Returns the downcasted uint32 from uint256, reverting on\n * overflow (when the input is greater than largest uint32).\n *\n * Counterpart to Solidity's `uint32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v2.5._\n */\n function toUint32(uint256 value) internal pure returns (uint32) {\n require(value \u003c= type(uint32).max, \"SafeCast: value doesn't fit in 32 bits\");\n return uint32(value);\n }\n\n /**\n * @dev Returns the downcasted uint24 from uint256, reverting on\n * overflow (when the input is greater than largest uint24).\n *\n * Counterpart to Solidity's `uint24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toUint24(uint256 value) internal pure returns (uint24) {\n require(value \u003c= type(uint24).max, \"SafeCast: value doesn't fit in 24 bits\");\n return uint24(value);\n }\n\n /**\n * @dev Returns the downcasted uint16 from uint256, reverting on\n * overflow (when the input is greater than largest uint16).\n *\n * Counterpart to Solidity's `uint16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v2.5._\n */\n function toUint16(uint256 value) internal pure returns (uint16) {\n require(value \u003c= type(uint16).max, \"SafeCast: value doesn't fit in 16 bits\");\n return uint16(value);\n }\n\n /**\n * @dev Returns the downcasted uint8 from uint256, reverting on\n * overflow (when the input is greater than largest uint8).\n *\n * Counterpart to Solidity's `uint8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v2.5._\n */\n function toUint8(uint256 value) internal pure returns (uint8) {\n require(value \u003c= type(uint8).max, \"SafeCast: value doesn't fit in 8 bits\");\n return uint8(value);\n }\n\n /**\n * @dev Converts a signed int256 into an unsigned uint256.\n *\n * Requirements:\n *\n * - input must be greater than or equal to 0.\n *\n * _Available since v3.0._\n */\n function toUint256(int256 value) internal pure returns (uint256) {\n require(value \u003e= 0, \"SafeCast: value must be positive\");\n return uint256(value);\n }\n\n /**\n * @dev Returns the downcasted int248 from int256, reverting on\n * overflow (when the input is less than smallest int248 or\n * greater than largest int248).\n *\n * Counterpart to Solidity's `int248` operator.\n *\n * Requirements:\n *\n * - input must fit into 248 bits\n *\n * _Available since v4.7._\n */\n function toInt248(int256 value) internal pure returns (int248 downcasted) {\n downcasted = int248(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 248 bits\");\n }\n\n /**\n * @dev Returns the downcasted int240 from int256, reverting on\n * overflow (when the input is less than smallest int240 or\n * greater than largest int240).\n *\n * Counterpart to Solidity's `int240` operator.\n *\n * Requirements:\n *\n * - input must fit into 240 bits\n *\n * _Available since v4.7._\n */\n function toInt240(int256 value) internal pure returns (int240 downcasted) {\n downcasted = int240(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 240 bits\");\n }\n\n /**\n * @dev Returns the downcasted int232 from int256, reverting on\n * overflow (when the input is less than smallest int232 or\n * greater than largest int232).\n *\n * Counterpart to Solidity's `int232` operator.\n *\n * Requirements:\n *\n * - input must fit into 232 bits\n *\n * _Available since v4.7._\n */\n function toInt232(int256 value) internal pure returns (int232 downcasted) {\n downcasted = int232(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 232 bits\");\n }\n\n /**\n * @dev Returns the downcasted int224 from int256, reverting on\n * overflow (when the input is less than smallest int224 or\n * greater than largest int224).\n *\n * Counterpart to Solidity's `int224` operator.\n *\n * Requirements:\n *\n * - input must fit into 224 bits\n *\n * _Available since v4.7._\n */\n function toInt224(int256 value) internal pure returns (int224 downcasted) {\n downcasted = int224(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 224 bits\");\n }\n\n /**\n * @dev Returns the downcasted int216 from int256, reverting on\n * overflow (when the input is less than smallest int216 or\n * greater than largest int216).\n *\n * Counterpart to Solidity's `int216` operator.\n *\n * Requirements:\n *\n * - input must fit into 216 bits\n *\n * _Available since v4.7._\n */\n function toInt216(int256 value) internal pure returns (int216 downcasted) {\n downcasted = int216(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 216 bits\");\n }\n\n /**\n * @dev Returns the downcasted int208 from int256, reverting on\n * overflow (when the input is less than smallest int208 or\n * greater than largest int208).\n *\n * Counterpart to Solidity's `int208` operator.\n *\n * Requirements:\n *\n * - input must fit into 208 bits\n *\n * _Available since v4.7._\n */\n function toInt208(int256 value) internal pure returns (int208 downcasted) {\n downcasted = int208(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 208 bits\");\n }\n\n /**\n * @dev Returns the downcasted int200 from int256, reverting on\n * overflow (when the input is less than smallest int200 or\n * greater than largest int200).\n *\n * Counterpart to Solidity's `int200` operator.\n *\n * Requirements:\n *\n * - input must fit into 200 bits\n *\n * _Available since v4.7._\n */\n function toInt200(int256 value) internal pure returns (int200 downcasted) {\n downcasted = int200(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 200 bits\");\n }\n\n /**\n * @dev Returns the downcasted int192 from int256, reverting on\n * overflow (when the input is less than smallest int192 or\n * greater than largest int192).\n *\n * Counterpart to Solidity's `int192` operator.\n *\n * Requirements:\n *\n * - input must fit into 192 bits\n *\n * _Available since v4.7._\n */\n function toInt192(int256 value) internal pure returns (int192 downcasted) {\n downcasted = int192(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 192 bits\");\n }\n\n /**\n * @dev Returns the downcasted int184 from int256, reverting on\n * overflow (when the input is less than smallest int184 or\n * greater than largest int184).\n *\n * Counterpart to Solidity's `int184` operator.\n *\n * Requirements:\n *\n * - input must fit into 184 bits\n *\n * _Available since v4.7._\n */\n function toInt184(int256 value) internal pure returns (int184 downcasted) {\n downcasted = int184(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 184 bits\");\n }\n\n /**\n * @dev Returns the downcasted int176 from int256, reverting on\n * overflow (when the input is less than smallest int176 or\n * greater than largest int176).\n *\n * Counterpart to Solidity's `int176` operator.\n *\n * Requirements:\n *\n * - input must fit into 176 bits\n *\n * _Available since v4.7._\n */\n function toInt176(int256 value) internal pure returns (int176 downcasted) {\n downcasted = int176(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 176 bits\");\n }\n\n /**\n * @dev Returns the downcasted int168 from int256, reverting on\n * overflow (when the input is less than smallest int168 or\n * greater than largest int168).\n *\n * Counterpart to Solidity's `int168` operator.\n *\n * Requirements:\n *\n * - input must fit into 168 bits\n *\n * _Available since v4.7._\n */\n function toInt168(int256 value) internal pure returns (int168 downcasted) {\n downcasted = int168(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 168 bits\");\n }\n\n /**\n * @dev Returns the downcasted int160 from int256, reverting on\n * overflow (when the input is less than smallest int160 or\n * greater than largest int160).\n *\n * Counterpart to Solidity's `int160` operator.\n *\n * Requirements:\n *\n * - input must fit into 160 bits\n *\n * _Available since v4.7._\n */\n function toInt160(int256 value) internal pure returns (int160 downcasted) {\n downcasted = int160(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 160 bits\");\n }\n\n /**\n * @dev Returns the downcasted int152 from int256, reverting on\n * overflow (when the input is less than smallest int152 or\n * greater than largest int152).\n *\n * Counterpart to Solidity's `int152` operator.\n *\n * Requirements:\n *\n * - input must fit into 152 bits\n *\n * _Available since v4.7._\n */\n function toInt152(int256 value) internal pure returns (int152 downcasted) {\n downcasted = int152(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 152 bits\");\n }\n\n /**\n * @dev Returns the downcasted int144 from int256, reverting on\n * overflow (when the input is less than smallest int144 or\n * greater than largest int144).\n *\n * Counterpart to Solidity's `int144` operator.\n *\n * Requirements:\n *\n * - input must fit into 144 bits\n *\n * _Available since v4.7._\n */\n function toInt144(int256 value) internal pure returns (int144 downcasted) {\n downcasted = int144(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 144 bits\");\n }\n\n /**\n * @dev Returns the downcasted int136 from int256, reverting on\n * overflow (when the input is less than smallest int136 or\n * greater than largest int136).\n *\n * Counterpart to Solidity's `int136` operator.\n *\n * Requirements:\n *\n * - input must fit into 136 bits\n *\n * _Available since v4.7._\n */\n function toInt136(int256 value) internal pure returns (int136 downcasted) {\n downcasted = int136(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 136 bits\");\n }\n\n /**\n * @dev Returns the downcasted int128 from int256, reverting on\n * overflow (when the input is less than smallest int128 or\n * greater than largest int128).\n *\n * Counterpart to Solidity's `int128` operator.\n *\n * Requirements:\n *\n * - input must fit into 128 bits\n *\n * _Available since v3.1._\n */\n function toInt128(int256 value) internal pure returns (int128 downcasted) {\n downcasted = int128(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 128 bits\");\n }\n\n /**\n * @dev Returns the downcasted int120 from int256, reverting on\n * overflow (when the input is less than smallest int120 or\n * greater than largest int120).\n *\n * Counterpart to Solidity's `int120` operator.\n *\n * Requirements:\n *\n * - input must fit into 120 bits\n *\n * _Available since v4.7._\n */\n function toInt120(int256 value) internal pure returns (int120 downcasted) {\n downcasted = int120(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 120 bits\");\n }\n\n /**\n * @dev Returns the downcasted int112 from int256, reverting on\n * overflow (when the input is less than smallest int112 or\n * greater than largest int112).\n *\n * Counterpart to Solidity's `int112` operator.\n *\n * Requirements:\n *\n * - input must fit into 112 bits\n *\n * _Available since v4.7._\n */\n function toInt112(int256 value) internal pure returns (int112 downcasted) {\n downcasted = int112(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 112 bits\");\n }\n\n /**\n * @dev Returns the downcasted int104 from int256, reverting on\n * overflow (when the input is less than smallest int104 or\n * greater than largest int104).\n *\n * Counterpart to Solidity's `int104` operator.\n *\n * Requirements:\n *\n * - input must fit into 104 bits\n *\n * _Available since v4.7._\n */\n function toInt104(int256 value) internal pure returns (int104 downcasted) {\n downcasted = int104(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 104 bits\");\n }\n\n /**\n * @dev Returns the downcasted int96 from int256, reverting on\n * overflow (when the input is less than smallest int96 or\n * greater than largest int96).\n *\n * Counterpart to Solidity's `int96` operator.\n *\n * Requirements:\n *\n * - input must fit into 96 bits\n *\n * _Available since v4.7._\n */\n function toInt96(int256 value) internal pure returns (int96 downcasted) {\n downcasted = int96(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 96 bits\");\n }\n\n /**\n * @dev Returns the downcasted int88 from int256, reverting on\n * overflow (when the input is less than smallest int88 or\n * greater than largest int88).\n *\n * Counterpart to Solidity's `int88` operator.\n *\n * Requirements:\n *\n * - input must fit into 88 bits\n *\n * _Available since v4.7._\n */\n function toInt88(int256 value) internal pure returns (int88 downcasted) {\n downcasted = int88(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 88 bits\");\n }\n\n /**\n * @dev Returns the downcasted int80 from int256, reverting on\n * overflow (when the input is less than smallest int80 or\n * greater than largest int80).\n *\n * Counterpart to Solidity's `int80` operator.\n *\n * Requirements:\n *\n * - input must fit into 80 bits\n *\n * _Available since v4.7._\n */\n function toInt80(int256 value) internal pure returns (int80 downcasted) {\n downcasted = int80(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 80 bits\");\n }\n\n /**\n * @dev Returns the downcasted int72 from int256, reverting on\n * overflow (when the input is less than smallest int72 or\n * greater than largest int72).\n *\n * Counterpart to Solidity's `int72` operator.\n *\n * Requirements:\n *\n * - input must fit into 72 bits\n *\n * _Available since v4.7._\n */\n function toInt72(int256 value) internal pure returns (int72 downcasted) {\n downcasted = int72(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 72 bits\");\n }\n\n /**\n * @dev Returns the downcasted int64 from int256, reverting on\n * overflow (when the input is less than smallest int64 or\n * greater than largest int64).\n *\n * Counterpart to Solidity's `int64` operator.\n *\n * Requirements:\n *\n * - input must fit into 64 bits\n *\n * _Available since v3.1._\n */\n function toInt64(int256 value) internal pure returns (int64 downcasted) {\n downcasted = int64(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 64 bits\");\n }\n\n /**\n * @dev Returns the downcasted int56 from int256, reverting on\n * overflow (when the input is less than smallest int56 or\n * greater than largest int56).\n *\n * Counterpart to Solidity's `int56` operator.\n *\n * Requirements:\n *\n * - input must fit into 56 bits\n *\n * _Available since v4.7._\n */\n function toInt56(int256 value) internal pure returns (int56 downcasted) {\n downcasted = int56(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 56 bits\");\n }\n\n /**\n * @dev Returns the downcasted int48 from int256, reverting on\n * overflow (when the input is less than smallest int48 or\n * greater than largest int48).\n *\n * Counterpart to Solidity's `int48` operator.\n *\n * Requirements:\n *\n * - input must fit into 48 bits\n *\n * _Available since v4.7._\n */\n function toInt48(int256 value) internal pure returns (int48 downcasted) {\n downcasted = int48(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 48 bits\");\n }\n\n /**\n * @dev Returns the downcasted int40 from int256, reverting on\n * overflow (when the input is less than smallest int40 or\n * greater than largest int40).\n *\n * Counterpart to Solidity's `int40` operator.\n *\n * Requirements:\n *\n * - input must fit into 40 bits\n *\n * _Available since v4.7._\n */\n function toInt40(int256 value) internal pure returns (int40 downcasted) {\n downcasted = int40(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 40 bits\");\n }\n\n /**\n * @dev Returns the downcasted int32 from int256, reverting on\n * overflow (when the input is less than smallest int32 or\n * greater than largest int32).\n *\n * Counterpart to Solidity's `int32` operator.\n *\n * Requirements:\n *\n * - input must fit into 32 bits\n *\n * _Available since v3.1._\n */\n function toInt32(int256 value) internal pure returns (int32 downcasted) {\n downcasted = int32(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 32 bits\");\n }\n\n /**\n * @dev Returns the downcasted int24 from int256, reverting on\n * overflow (when the input is less than smallest int24 or\n * greater than largest int24).\n *\n * Counterpart to Solidity's `int24` operator.\n *\n * Requirements:\n *\n * - input must fit into 24 bits\n *\n * _Available since v4.7._\n */\n function toInt24(int256 value) internal pure returns (int24 downcasted) {\n downcasted = int24(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 24 bits\");\n }\n\n /**\n * @dev Returns the downcasted int16 from int256, reverting on\n * overflow (when the input is less than smallest int16 or\n * greater than largest int16).\n *\n * Counterpart to Solidity's `int16` operator.\n *\n * Requirements:\n *\n * - input must fit into 16 bits\n *\n * _Available since v3.1._\n */\n function toInt16(int256 value) internal pure returns (int16 downcasted) {\n downcasted = int16(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 16 bits\");\n }\n\n /**\n * @dev Returns the downcasted int8 from int256, reverting on\n * overflow (when the input is less than smallest int8 or\n * greater than largest int8).\n *\n * Counterpart to Solidity's `int8` operator.\n *\n * Requirements:\n *\n * - input must fit into 8 bits\n *\n * _Available since v3.1._\n */\n function toInt8(int256 value) internal pure returns (int8 downcasted) {\n downcasted = int8(value);\n require(downcasted == value, \"SafeCast: value doesn't fit in 8 bits\");\n }\n\n /**\n * @dev Converts an unsigned uint256 into a signed int256.\n *\n * Requirements:\n *\n * - input must be less than or equal to maxInt256.\n *\n * _Available since v3.0._\n */\n function toInt256(uint256 value) internal pure returns (int256) {\n // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive\n require(value \u003c= uint256(type(int256).max), \"SafeCast: value doesn't fit in an int256\");\n return int256(value);\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n *\n * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length \u003e 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length \u003e 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n\n// contracts/base/MultiCallable.sol\n\n/// @notice Collection of Multicall utilities. Fork of Multicall3:\n/// https://github.com/mds1/multicall/blob/master/src/Multicall3.sol\nabstract contract MultiCallable {\n struct Call {\n bool allowFailure;\n bytes callData;\n }\n\n struct Result {\n bool success;\n bytes returnData;\n }\n\n /// @notice Aggregates a few calls to this contract into one multicall without modifying `msg.sender`.\n function multicall(Call[] calldata calls) external returns (Result[] memory callResults) {\n uint256 amount = calls.length;\n callResults = new Result[](amount);\n Call calldata call_;\n for (uint256 i = 0; i \u003c amount;) {\n call_ = calls[i];\n Result memory result = callResults[i];\n // We perform a delegate call to ourselves here. Delegate call does not modify `msg.sender`, so\n // this will have the same effect as if `msg.sender` performed all the calls themselves one by one.\n // solhint-disable-next-line avoid-low-level-calls\n (result.success, result.returnData) = address(this).delegatecall(call_.callData);\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Revert if the call fails and failure is not allowed\n // `allowFailure := calldataload(call_)` and `success := mload(result)`\n if iszero(or(calldataload(call_), mload(result))) {\n // Revert with `0x4d6a2328` (function selector for `MulticallFailed()`)\n mstore(0x00, 0x4d6a232800000000000000000000000000000000000000000000000000000000)\n revert(0x00, 0x04)\n }\n }\n unchecked {\n ++i;\n }\n }\n }\n}\n\n// contracts/base/Version.sol\n\n/**\n * @title Versioned\n * @notice Version getter for contracts. Doesn't use any storage slots, meaning\n * it will never cause any troubles with the upgradeable contracts. For instance, this contract\n * can be added or removed from the inheritance chain without shifting the storage layout.\n */\nabstract contract Versioned {\n /**\n * @notice Struct that is mimicking the storage layout of a string with 32 bytes or less.\n * Length is limited by 32, so the whole string payload takes two memory words:\n * @param length String length\n * @param data String characters\n */\n struct _ShortString {\n uint256 length;\n bytes32 data;\n }\n\n /// @dev Length of the \"version string\"\n uint256 private immutable _length;\n /// @dev Bytes representation of the \"version string\".\n /// Strings with length over 32 are not supported!\n bytes32 private immutable _data;\n\n constructor(string memory version_) {\n _length = bytes(version_).length;\n if (_length \u003e 32) revert IncorrectVersionLength();\n // bytes32 is left-aligned =\u003e this will store the byte representation of the string\n // with the trailing zeroes to complete the 32-byte word\n _data = bytes32(bytes(version_));\n }\n\n function version() external view returns (string memory versionString) {\n // Load the immutable values to form the version string\n _ShortString memory str = _ShortString(_length, _data);\n // The only way to do this cast is doing some dirty assembly\n assembly {\n // solhint-disable-previous-line no-inline-assembly\n versionString := str\n }\n }\n}\n\n// contracts/libs/ChainContext.sol\n\n/// @notice Library for accessing chain context variables as tightly packed integers.\n/// Messaging contracts should rely on this library for accessing chain context variables\n/// instead of doing the casting themselves.\nlibrary ChainContext {\n using SafeCast for uint256;\n\n /// @notice Returns the current block number as uint40.\n /// @dev Reverts if block number is greater than 40 bits, which is not supposed to happen\n /// until the block.timestamp overflows (assuming block time is at least 1 second).\n function blockNumber() internal view returns (uint40) {\n return block.number.toUint40();\n }\n\n /// @notice Returns the current block timestamp as uint40.\n /// @dev Reverts if block timestamp is greater than 40 bits, which is\n /// supposed to happen approximately in year 36835.\n function blockTimestamp() internal view returns (uint40) {\n return block.timestamp.toUint40();\n }\n\n /// @notice Returns the chain id as uint32.\n /// @dev Reverts if chain id is greater than 32 bits, which is not\n /// supposed to happen in production.\n function chainId() internal view returns (uint32) {\n return block.chainid.toUint32();\n }\n}\n\n// contracts/libs/stack/GasData.sol\n\n/// GasData in encoded data with \"basic information about gas prices\" for some chain.\ntype GasData is uint96;\n\nusing GasDataLib for GasData global;\n\n/// ChainGas is encoded data with given chain's \"basic information about gas prices\".\ntype ChainGas is uint128;\n\nusing GasDataLib for ChainGas global;\n\n/// Library for encoding and decoding GasData and ChainGas structs.\n/// # GasData\n/// `GasData` is a struct to store the \"basic information about gas prices\", that could\n/// be later used to approximate the cost of a message execution, and thus derive the\n/// minimal tip values for sending a message to the chain.\n/// \u003e - `GasData` is supposed to be cached by `GasOracle` contract, allowing to store the\n/// \u003e approximates instead of the exact values, and thus save on storage costs.\n/// \u003e - For instance, if `GasOracle` only updates the values on +- 10% change, having an\n/// \u003e 0.4% error on the approximates would be acceptable.\n/// `GasData` is supposed to be included in the Origin's state, which are synced across\n/// chains using Agent-signed snapshots and attestations.\n/// ## GasData stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------------ | ------ | ----- | --------------------------------------------------- |\n/// | (012..010] | gasPrice | uint16 | 2 | Gas price for the chain (in Wei per gas unit) |\n/// | (010..008] | dataPrice | uint16 | 2 | Calldata price (in Wei per byte of content) |\n/// | (008..006] | execBuffer | uint16 | 2 | Tx fee safety buffer for message execution (in Wei) |\n/// | (006..004] | amortAttCost | uint16 | 2 | Amortized cost for attestation submission (in Wei) |\n/// | (004..002] | etherPrice | uint16 | 2 | Chain's Ether Price / Mainnet Ether Price (in BWAD) |\n/// | (002..000] | markup | uint16 | 2 | Markup for the message execution (in BWAD) |\n/// \u003e See Number.sol for more details on `Number` type and BWAD (binary WAD) math.\n///\n/// ## ChainGas stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | ------- | ------ | ----- | ---------------- |\n/// | (016..004] | gasData | uint96 | 12 | Chain's gas data |\n/// | (004..000] | domain | uint32 | 4 | Chain's domain |\nlibrary GasDataLib {\n /// @dev Amount of bits to shift to gasPrice field\n uint96 private constant SHIFT_GAS_PRICE = 10 * 8;\n /// @dev Amount of bits to shift to dataPrice field\n uint96 private constant SHIFT_DATA_PRICE = 8 * 8;\n /// @dev Amount of bits to shift to execBuffer field\n uint96 private constant SHIFT_EXEC_BUFFER = 6 * 8;\n /// @dev Amount of bits to shift to amortAttCost field\n uint96 private constant SHIFT_AMORT_ATT_COST = 4 * 8;\n /// @dev Amount of bits to shift to etherPrice field\n uint96 private constant SHIFT_ETHER_PRICE = 2 * 8;\n\n /// @dev Amount of bits to shift to gasData field\n uint128 private constant SHIFT_GAS_DATA = 4 * 8;\n\n // ═════════════════════════════════════════════════ GAS DATA ══════════════════════════════════════════════════════\n\n /// @notice Returns an encoded GasData struct with the given fields.\n /// @param gasPrice_ Gas price for the chain (in Wei per gas unit)\n /// @param dataPrice_ Calldata price (in Wei per byte of content)\n /// @param execBuffer_ Tx fee safety buffer for message execution (in Wei)\n /// @param amortAttCost_ Amortized cost for attestation submission (in Wei)\n /// @param etherPrice_ Ratio of Chain's Ether Price / Mainnet Ether Price (in BWAD)\n /// @param markup_ Markup for the message execution (in BWAD)\n function encodeGasData(\n Number gasPrice_,\n Number dataPrice_,\n Number execBuffer_,\n Number amortAttCost_,\n Number etherPrice_,\n Number markup_\n ) internal pure returns (GasData) {\n // Number type wraps uint16, so could safely be casted to uint96\n // forgefmt: disable-next-item\n return GasData.wrap(\n uint96(Number.unwrap(gasPrice_)) \u003c\u003c SHIFT_GAS_PRICE |\n uint96(Number.unwrap(dataPrice_)) \u003c\u003c SHIFT_DATA_PRICE |\n uint96(Number.unwrap(execBuffer_)) \u003c\u003c SHIFT_EXEC_BUFFER |\n uint96(Number.unwrap(amortAttCost_)) \u003c\u003c SHIFT_AMORT_ATT_COST |\n uint96(Number.unwrap(etherPrice_)) \u003c\u003c SHIFT_ETHER_PRICE |\n uint96(Number.unwrap(markup_))\n );\n }\n\n /// @notice Wraps padded uint256 value into GasData struct.\n function wrapGasData(uint256 paddedGasData) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(paddedGasData));\n }\n\n /// @notice Returns the gas price, in Wei per gas unit.\n function gasPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_GAS_PRICE));\n }\n\n /// @notice Returns the calldata price, in Wei per byte of content.\n function dataPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_DATA_PRICE));\n }\n\n /// @notice Returns the tx fee safety buffer for message execution, in Wei.\n function execBuffer(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_EXEC_BUFFER));\n }\n\n /// @notice Returns the amortized cost for attestation submission, in Wei.\n function amortAttCost(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_AMORT_ATT_COST));\n }\n\n /// @notice Returns the ratio of Chain's Ether Price / Mainnet Ether Price, in BWAD math.\n function etherPrice(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data) \u003e\u003e SHIFT_ETHER_PRICE));\n }\n\n /// @notice Returns the markup for the message execution, in BWAD math.\n function markup(GasData data) internal pure returns (Number) {\n // Casting to uint16 will truncate the highest bits, which is the behavior we want\n return Number.wrap(uint16(GasData.unwrap(data)));\n }\n\n // ════════════════════════════════════════════════ CHAIN DATA ═════════════════════════════════════════════════════\n\n /// @notice Returns an encoded ChainGas struct with the given fields.\n /// @param gasData_ Chain's gas data\n /// @param domain_ Chain's domain\n function encodeChainGas(GasData gasData_, uint32 domain_) internal pure returns (ChainGas) {\n // GasData type wraps uint96, so could safely be casted to uint128\n return ChainGas.wrap(uint128(GasData.unwrap(gasData_)) \u003c\u003c SHIFT_GAS_DATA | uint128(domain_));\n }\n\n /// @notice Wraps padded uint256 value into ChainGas struct.\n function wrapChainGas(uint256 paddedChainGas) internal pure returns (ChainGas) {\n // Casting to uint128 will truncate the highest bits, which is the behavior we want\n return ChainGas.wrap(uint128(paddedChainGas));\n }\n\n /// @notice Returns the chain's gas data.\n function gasData(ChainGas data) internal pure returns (GasData) {\n // Casting to uint96 will truncate the highest bits, which is the behavior we want\n return GasData.wrap(uint96(ChainGas.unwrap(data) \u003e\u003e SHIFT_GAS_DATA));\n }\n\n /// @notice Returns the chain's domain.\n function domain(ChainGas data) internal pure returns (uint32) {\n // Casting to uint32 will truncate the highest bits, which is the behavior we want\n return uint32(ChainGas.unwrap(data));\n }\n\n /// @notice Returns the hash for the list of ChainGas structs.\n function snapGasHash(ChainGas[] memory snapGas) internal pure returns (bytes32 snapGasHash_) {\n // Use assembly to calculate the hash of the array without copying it\n // ChainGas takes a single word of storage, thus ChainGas[] is stored in the following way:\n // 0x00: length of the array, in words\n // 0x20: first ChainGas struct\n // 0x40: second ChainGas struct\n // And so on...\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Find the location where the array data starts, we add 0x20 to skip the length field\n let loc := add(snapGas, 0x20)\n // Load the length of the array (in words).\n // Shifting left 5 bits is equivalent to multiplying by 32: this converts from words to bytes.\n let len := shl(5, mload(snapGas))\n // Calculate the hash of the array\n snapGasHash_ := keccak256(loc, len)\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall \u0026\u0026 _initialized \u003c 1) || (!AddressUpgradeable.isContract(address(this)) \u0026\u0026 _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing \u0026\u0026 _initialized \u003c version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n\n// contracts/interfaces/InterfaceDestination.sol\n\ninterface InterfaceDestination {\n /**\n * @notice Attempts to pass a quarantined Agent Merkle Root to a local Light Manager.\n * @dev Will do nothing, if root optimistic period is not over.\n * @return rootPending Whether there is a pending agent merkle root left\n */\n function passAgentRoot() external returns (bool rootPending);\n\n /**\n * @notice Accepts an attestation, which local `AgentManager` verified to have been signed\n * by an active Notary for this chain.\n * \u003e Attestation is created whenever a Notary-signed snapshot is saved in Summit on Synapse Chain.\n * - Saved Attestation could be later used to prove the inclusion of message in the Origin Merkle Tree.\n * - Messages coming from chains included in the Attestation's snapshot could be proven.\n * - Proof only exists for messages that were sent prior to when the Attestation's snapshot was taken.\n * \u003e Will revert if any of these is true:\n * \u003e - Called by anyone other than local `AgentManager`.\n * \u003e - Attestation payload is not properly formatted.\n * \u003e - Attestation signer is in Dispute.\n * \u003e - Attestation's snapshot root has been previously submitted.\n * Note: agentRoot and snapGas have been verified by the local `AgentManager`.\n * @param notaryIndex Index of Attestation Notary in Agent Merkle Tree\n * @param sigIndex Index of stored Notary signature\n * @param attPayload Raw payload with Attestation data\n * @param agentRoot Agent Merkle Root from the Attestation\n * @param snapGas Gas data for each chain in the Attestation's snapshot\n * @return wasAccepted Whether the Attestation was accepted\n */\n function acceptAttestation(\n uint32 notaryIndex,\n uint256 sigIndex,\n bytes memory attPayload,\n bytes32 agentRoot,\n ChainGas[] memory snapGas\n ) external returns (bool wasAccepted);\n\n // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════\n\n /**\n * @notice Returns the total amount of Notaries attestations that have been accepted.\n */\n function attestationsAmount() external view returns (uint256);\n\n /**\n * @notice Returns a Notary-signed attestation with a given index.\n * \u003e Index refers to the list of all attestations accepted by this contract.\n * @dev Attestations are created on Synapse Chain whenever a Notary-signed snapshot is accepted by Summit.\n * Will return an empty signature if this contract is deployed on Synapse Chain.\n * @param index Attestation index\n * @return attPayload Raw payload with Attestation data\n * @return attSignature Notary signature for the reported attestation\n */\n function getAttestation(uint256 index) external view returns (bytes memory attPayload, bytes memory attSignature);\n\n /**\n * @notice Returns the gas data for a given chain from the latest accepted attestation with that chain.\n * @dev Will return empty values if there is no data for the domain,\n * or if the notary who provided the data is in dispute.\n * @param domain Domain for the chain\n * @return gasData Gas data for the chain\n * @return dataMaturity Gas data age in seconds\n */\n function getGasData(uint32 domain) external view returns (GasData gasData, uint256 dataMaturity);\n\n /**\n * Returns status of Destination contract as far as snapshot/agent roots are concerned\n * @return snapRootTime Timestamp when latest snapshot root was accepted\n * @return agentRootTime Timestamp when latest agent root was accepted\n * @return notaryIndex Index of Notary who signed the latest agent root\n */\n function destStatus() external view returns (uint40 snapRootTime, uint40 agentRootTime, uint32 notaryIndex);\n\n /**\n * Returns Agent Merkle Root to be passed to LightManager once its optimistic period is over.\n */\n function nextAgentRoot() external view returns (bytes32);\n\n /**\n * @notice Returns the nonce of the last attestation submitted by a Notary with a given agent index.\n * @dev Will return zero if the Notary hasn't submitted any attestations yet.\n */\n function lastAttestationNonce(uint32 notaryIndex) external view returns (uint32);\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n\n// contracts/libs/stack/Tips.sol\n\n/// Tips is encoded data with \"tips paid for sending a base message\".\n/// Note: even though uint256 is also an underlying type for MemView, Tips is stored ON STACK.\ntype Tips is uint256;\n\nusing TipsLib for Tips global;\n\n/// # Tips\n/// Library for formatting _the tips part_ of _the base messages_.\n///\n/// ## How the tips are awarded\n/// Tips are paid for sending a base message, and are split across all the agents that\n/// made the message execution on destination chain possible.\n/// ### Summit tips\n/// Split between:\n/// - Guard posting a snapshot with state ST_G for the origin chain.\n/// - Notary posting a snapshot SN_N using ST_G. This creates attestation A.\n/// - Notary posting a message receipt after it is executed on destination chain.\n/// ### Attestation tips\n/// Paid to:\n/// - Notary posting attestation A to destination chain.\n/// ### Execution tips\n/// Paid to:\n/// - First executor performing a valid execution attempt (correct proofs, optimistic period over),\n/// using attestation A to prove message inclusion on origin chain, whether the recipient reverted or not.\n/// ### Delivery tips.\n/// Paid to:\n/// - Executor who successfully executed the message on destination chain.\n///\n/// ## Tips encoding\n/// - Tips occupy a single storage word, and thus are stored on stack instead of being stored in memory.\n/// - The actual tip values should be determined by multiplying stored values by divided by TIPS_MULTIPLIER=2**32.\n/// - Tips are packed into a single word of storage, while allowing real values up to ~8*10**28 for every tip category.\n/// \u003e The only downside is that the \"real tip values\" are now multiplies of ~4*10**9, which should be fine even for\n/// the chains with the most expensive gas currency.\n/// # Tips stack layout (from highest bits to lowest)\n///\n/// | Position | Field | Type | Bytes | Description |\n/// | ---------- | -------------- | ------ | ----- | ---------------------------------------------------------- |\n/// | (032..024] | summitTip | uint64 | 8 | Tip for agents interacting with Summit contract |\n/// | (024..016] | attestationTip | uint64 | 8 | Tip for Notary posting attestation to Destination contract |\n/// | (016..008] | executionTip | uint64 | 8 | Tip for valid execution attempt on destination chain |\n/// | (008..000] | deliveryTip | uint64 | 8 | Tip for successful message delivery on destination chain |\n\nlibrary TipsLib {\n using SafeCast for uint256;\n\n /// @dev Amount of bits to shift to summitTip field\n uint256 private constant SHIFT_SUMMIT_TIP = 24 * 8;\n /// @dev Amount of bits to shift to attestationTip field\n uint256 private constant SHIFT_ATTESTATION_TIP = 16 * 8;\n /// @dev Amount of bits to shift to executionTip field\n uint256 private constant SHIFT_EXECUTION_TIP = 8 * 8;\n\n // ═══════════════════════════════════════════════════ TIPS ════════════════════════════════════════════════════════\n\n /// @notice Returns encoded tips with the given fields\n /// @param summitTip_ Tip for agents interacting with Summit contract, divided by TIPS_MULTIPLIER\n /// @param attestationTip_ Tip for Notary posting attestation to Destination contract, divided by TIPS_MULTIPLIER\n /// @param executionTip_ Tip for valid execution attempt on destination chain, divided by TIPS_MULTIPLIER\n /// @param deliveryTip_ Tip for successful message delivery on destination chain, divided by TIPS_MULTIPLIER\n function encodeTips(uint64 summitTip_, uint64 attestationTip_, uint64 executionTip_, uint64 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // forgefmt: disable-next-item\n return Tips.wrap(\n uint256(summitTip_) \u003c\u003c SHIFT_SUMMIT_TIP |\n uint256(attestationTip_) \u003c\u003c SHIFT_ATTESTATION_TIP |\n uint256(executionTip_) \u003c\u003c SHIFT_EXECUTION_TIP |\n uint256(deliveryTip_)\n );\n }\n\n /// @notice Convenience function to encode tips with uint256 values.\n function encodeTips256(uint256 summitTip_, uint256 attestationTip_, uint256 executionTip_, uint256 deliveryTip_)\n internal\n pure\n returns (Tips)\n {\n // In practice, the tips amounts are not supposed to be higher than 2**96, and with 32 bits of granularity\n // using uint64 is enough to store the values. However, we still check for overflow just in case.\n // TODO: consider using Number type to store the tips values.\n return encodeTips({\n summitTip_: (summitTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n attestationTip_: (attestationTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n executionTip_: (executionTip_ \u003e\u003e TIPS_GRANULARITY).toUint64(),\n deliveryTip_: (deliveryTip_ \u003e\u003e TIPS_GRANULARITY).toUint64()\n });\n }\n\n /// @notice Wraps the padded encoded tips into a Tips-typed value.\n /// @dev There is no actual padding here, as the underlying type is already uint256,\n /// but we include this function for consistency and to be future-proof, if tips will eventually use anything\n /// smaller than uint256.\n function wrapPadded(uint256 paddedTips) internal pure returns (Tips) {\n return Tips.wrap(paddedTips);\n }\n\n /**\n * @notice Returns a formatted Tips payload specifying empty tips.\n * @return Formatted tips\n */\n function emptyTips() internal pure returns (Tips) {\n return Tips.wrap(0);\n }\n\n /// @notice Returns tips's hash: a leaf to be inserted in the \"Message mini-Merkle tree\".\n function leaf(Tips tips) internal pure returns (bytes32 hashedTips) {\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Store tips in scratch space\n mstore(0, tips)\n // Compute hash of tips padded to 32 bytes\n hashedTips := keccak256(0, 32)\n }\n }\n\n // ═══════════════════════════════════════════════ TIPS SLICING ════════════════════════════════════════════════════\n\n /// @notice Returns summitTip field\n function summitTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_SUMMIT_TIP);\n }\n\n /// @notice Returns attestationTip field\n function attestationTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_ATTESTATION_TIP);\n }\n\n /// @notice Returns executionTip field\n function executionTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips) \u003e\u003e SHIFT_EXECUTION_TIP);\n }\n\n /// @notice Returns deliveryTip field\n function deliveryTip(Tips tips) internal pure returns (uint64) {\n // Casting to uint64 will truncate the highest bits, which is the behavior we want\n return uint64(Tips.unwrap(tips));\n }\n\n // ════════════════════════════════════════════════ TIPS VALUE ═════════════════════════════════════════════════════\n\n /// @notice Returns total value of the tips payload.\n /// This is the sum of the encoded values, scaled up by TIPS_MULTIPLIER\n function value(Tips tips) internal pure returns (uint256 value_) {\n value_ = uint256(tips.summitTip()) + tips.attestationTip() + tips.executionTip() + tips.deliveryTip();\n value_ \u003c\u003c= TIPS_GRANULARITY;\n }\n\n /// @notice Increases the delivery tip to match the new value.\n function matchValue(Tips tips, uint256 newValue) internal pure returns (Tips newTips) {\n uint256 oldValue = tips.value();\n if (newValue \u003c oldValue) revert TipsValueTooLow();\n // We want to increase the delivery tip, while keeping the other tips the same\n unchecked {\n uint256 delta = (newValue - oldValue) \u003e\u003e TIPS_GRANULARITY;\n // `delta` fits into uint224, as TIPS_GRANULARITY is 32, so this never overflows uint256.\n // In practice, this will never overflow uint64 as well, but we still check it just in case.\n if (delta + tips.deliveryTip() \u003e type(uint64).max) revert TipsOverflow();\n // Delivery tips occupy lowest 8 bytes, so we can just add delta to the tips value\n // to effectively increase the delivery tip (knowing that delta fits into uint64).\n newTips = Tips.wrap(Tips.unwrap(tips) + delta);\n }\n }\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// node_modules/@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol\n\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)\n\n/**\n * @dev Contract module which provides access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership} and {acceptOwnership}.\n *\n * This module is used through inheritance. It will make available all functions\n * from parent (Ownable).\n */\nabstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {\n function __Ownable2Step_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable2Step_init_unchained() internal onlyInitializing {\n }\n address private _pendingOwner;\n\n event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Returns the address of the pending owner.\n */\n function pendingOwner() public view virtual returns (address) {\n return _pendingOwner;\n }\n\n /**\n * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual override onlyOwner {\n _pendingOwner = newOwner;\n emit OwnershipTransferStarted(owner(), newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual override {\n delete _pendingOwner;\n super._transferOwnership(newOwner);\n }\n\n /**\n * @dev The new owner accepts the ownership transfer.\n */\n function acceptOwnership() public virtual {\n address sender = _msgSender();\n require(pendingOwner() == sender, \"Ownable2Step: caller is not the new owner\");\n _transferOwnership(sender);\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n\n// contracts/base/MessagingBase.sol\n\n// ══════════════════════════════ LIBRARY IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n// ═════════════════════════════ EXTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice Base contract for all messaging contracts.\n * - Provides context on the local chain's domain.\n * - Provides ownership functionality.\n * - Will be providing pausing functionality when it is implemented.\n */\nabstract contract MessagingBase is MultiCallable, Versioned, Ownable2StepUpgradeable {\n // ════════════════════════════════════════════════ IMMUTABLES ═════════════════════════════════════════════════════\n\n /// @notice Domain of the local chain, set once upon contract creation\n uint32 public immutable localDomain;\n // @notice Domain of the Synapse chain, set once upon contract creation\n uint32 public immutable synapseDomain;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n /// @dev gap for upgrade safety\n uint256[50] private __GAP; // solhint-disable-line var-name-mixedcase\n\n constructor(string memory version_, uint32 synapseDomain_) Versioned(version_) {\n localDomain = ChainContext.chainId();\n synapseDomain = synapseDomain_;\n }\n\n // TODO: Implement pausing\n\n /**\n * @dev Should be impossible to renounce ownership;\n * we override OpenZeppelin OwnableUpgradeable's\n * implementation of renounceOwnership to make it a no-op\n */\n function renounceOwnership() public override onlyOwner {} //solhint-disable-line no-empty-blocks\n}\n\n// contracts/GasOracle.sol\n\n// ═════════════════════════════ INTERNAL IMPORTS ══════════════════════════════\n\n/**\n * @notice `GasOracle` contract is responsible for tracking the gas data for both local and remote chains.\n * ## Local gas data tracking\n * - `GasOracle` is using the available tools such as `tx.gasprice` to track the time-averaged values\n * for different \"gas statistics\" _(to be implemented in the future)_.\n * - These values are cached, so that the reported values are only changed when a big enough change is detected.\n * - In the MVP version the gas data is set manually by the owner of the contract.\n * - The reported values are included in Origin's State, whenever a new message is sent.\n * \u003e This leads to cached \"chain gas data\" being included in the Guard and Notary snapshots.\n * ## Remote gas data tracking\n * - To track gas data for the remote chains, GasOracle relies on the Notaries to pass the gas data alongside\n * their attestations.\n * - As the gas data is cached, this leads to a storage write only when the gas data\n * for the remote chain changes significantly.\n * - GasOracle is in charge of enforcing the optimistic periods for the gas data it gets from `Destination`.\n * - The optimistic period is smaller when the \"gas statistics\" are increasing, and bigger when they are decreasing.\n * \u003e Reason for that is that the decrease of the gas price leads to lower execution/delivery tips, and we want the\n * \u003e Executors to be protected against that.\n */\ncontract GasOracle is MessagingBase, GasOracleEvents, InterfaceGasOracle {\n // ══════════════════════════════════════════ IMMUTABLES \u0026 CONSTANTS ═══════════════════════════════════════════════\n\n address public immutable destination;\n\n // TODO: come up with refined values for the optimistic periods\n uint256 public constant GAS_DATA_INCREASED_OPTIMISTIC_PERIOD = 5 minutes;\n uint256 public constant GAS_DATA_DECREASED_OPTIMISTIC_PERIOD = 1 hours;\n\n // ══════════════════════════════════════════════════ STORAGE ══════════════════════════════════════════════════════\n\n mapping(uint32 =\u003e GasData) internal _gasData;\n\n // Fixed value for the summit tip, denominated in Ethereum Mainnet Wei.\n uint256 public summitTipWei;\n\n // ═════════════════════════════════════════ CONSTRUCTOR \u0026 INITIALIZER ═════════════════════════════════════════════\n\n constructor(uint32 synapseDomain_, address destination_) MessagingBase(\"0.0.3\", synapseDomain_) {\n destination = destination_;\n }\n\n /// @notice Initializes GasOracle contract:\n /// - msg.sender is set as contract owner\n function initialize() external initializer {\n // Initialize Ownable: msg.sender is set as \"owner\"\n __Ownable2Step_init();\n }\n\n /// @notice MVP function to set the gas data for the given domain.\n function setGasData(\n uint32 domain,\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n ) external onlyOwner {\n GasData updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: NumberLib.compress(gasPrice),\n dataPrice_: NumberLib.compress(dataPrice),\n execBuffer_: NumberLib.compress(execBuffer),\n amortAttCost_: NumberLib.compress(amortAttCost),\n etherPrice_: NumberLib.compress(etherPrice),\n markup_: NumberLib.compress(markup)\n });\n if (GasData.unwrap(updatedGasData) != GasData.unwrap(_gasData[domain])) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @notice MVP function to set the summit tip.\n function setSummitTip(uint256 summitTipWei_) external onlyOwner {\n if (summitTipWei_ \u003e MAX_SUMMIT_TIP) revert SummitTipTooHigh();\n summitTipWei = summitTipWei_;\n emit SummitTipUpdated(summitTipWei_);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function updateGasData(uint32 domain) external {\n (bool wasUpdated, GasData updatedGasData) = _fetchGasData(domain);\n if (wasUpdated) {\n _setGasData(domain, updatedGasData);\n }\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getDecodedGasData(uint32 domain)\n external\n view\n returns (\n uint256 gasPrice,\n uint256 dataPrice,\n uint256 execBuffer,\n uint256 amortAttCost,\n uint256 etherPrice,\n uint256 markup\n )\n {\n GasData gasData = _gasData[domain];\n gasPrice = NumberLib.decompress(gasData.gasPrice());\n dataPrice = NumberLib.decompress(gasData.dataPrice());\n execBuffer = NumberLib.decompress(gasData.execBuffer());\n amortAttCost = NumberLib.decompress(gasData.amortAttCost());\n etherPrice = NumberLib.decompress(gasData.etherPrice());\n markup = NumberLib.decompress(gasData.markup());\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getGasData() external view returns (uint256 paddedGasData) {\n return GasData.unwrap(_gasData[localDomain]);\n }\n\n /// @inheritdoc InterfaceGasOracle\n function getMinimumTips(uint32 destination_, uint256 paddedRequest, uint256 contentLength)\n external\n view\n returns (uint256 paddedTips)\n {\n if (destination_ == localDomain) revert IncorrectDestinationDomain();\n GasData localGasData = _gasData[localDomain];\n uint256 localEtherPrice = localGasData.etherPrice().decompress();\n if (localEtherPrice == 0) revert LocalGasDataNotSet();\n GasData remoteGasData = _gasData[destination_];\n uint256 remoteEtherPrice = remoteGasData.etherPrice().decompress();\n if (remoteEtherPrice == 0) revert RemoteGasDataNotSet();\n Request request = RequestLib.wrapPadded(paddedRequest);\n // TODO: figure out unchecked math\n // We store the fixed value of the summit tip in Ethereum Mainnet Wei already.\n // To convert it to local Ether, we need to divide by the local Ether price (using BWAD math).\n uint256 summitTip = (summitTipWei \u003c\u003c NumberLib.BWAD_SHIFT) / localEtherPrice;\n // To convert the cost from remote Ether to local Ether, we need to multiply by the ratio of the Ether prices.\n uint256 attestationTip = remoteGasData.amortAttCost().decompress() * remoteEtherPrice / localEtherPrice;\n // Total cost for Executor to execute a message on the remote chain has three components:\n // - Execution: gas price * requested gas limit\n // - Calldata: data price * content length\n // - Buffer: additional fee to account for computations before and after the actual execution\n // Same logic for converting the cost from remote Ether to local Ether applies here.\n // forgefmt: disable-next-item\n uint256 executionTip = (\n remoteGasData.gasPrice().decompress() * request.gasLimit() +\n remoteGasData.dataPrice().decompress() * contentLength +\n remoteGasData.execBuffer().decompress()\n ) * remoteEtherPrice / localEtherPrice;\n // Markup for executionTip is assigned to the Delivery tip. Markup is denominated in BWAD units.\n // Execution tip is already denominated in local Ether units.\n uint256 deliveryTip = (executionTip * remoteGasData.markup().decompress()) \u003e\u003e NumberLib.BWAD_SHIFT;\n // The price of the gas airdrop is also included in the Delivery tip.\n // TODO: enable when gasDrop is implemented\n // deliveryTip += request.gasDrop() * remoteEtherPrice / localEtherPrice;\n // Use calculated values to encode the tips.\n return Tips.unwrap(\n TipsLib.encodeTips256({\n summitTip_: summitTip,\n attestationTip_: attestationTip,\n executionTip_: executionTip,\n deliveryTip_: deliveryTip\n })\n );\n }\n\n // ══════════════════════════════════════════════ INTERNAL LOGIC ═══════════════════════════════════════════════════\n\n /// @dev Sets the gas data for the given domain, and emits a corresponding event.\n function _setGasData(uint32 domain, GasData updatedGasData) internal {\n _gasData[domain] = updatedGasData;\n emit GasDataUpdated(domain, GasData.unwrap(updatedGasData));\n }\n\n // ══════════════════════════════════════════════ INTERNAL VIEWS ═══════════════════════════════════════════════════\n\n /// @dev Returns the updated gas data for the given domain by\n /// optimistically consuming the data from the `Destination` contract.\n function _fetchGasData(uint32 domain) internal view returns (bool wasUpdated, GasData updatedGasData) {\n GasData current = _gasData[domain];\n // Destination only has the gas data for the remote domains.\n if (domain == localDomain) return (false, current);\n (GasData incoming, uint256 dataMaturity) = InterfaceDestination(destination).getGasData(domain);\n // Zero maturity means that either there is no data for the domain, or it was just updated.\n // In both cases, we don't want to update the local data.\n if (dataMaturity == 0) return (false, current);\n // Update each gas parameter separately.\n updatedGasData = GasDataLib.encodeGasData({\n gasPrice_: _updateGasParameter(current.gasPrice(), incoming.gasPrice(), dataMaturity),\n dataPrice_: _updateGasParameter(current.dataPrice(), incoming.dataPrice(), dataMaturity),\n execBuffer_: _updateGasParameter(current.execBuffer(), incoming.execBuffer(), dataMaturity),\n amortAttCost_: _updateGasParameter(current.amortAttCost(), incoming.amortAttCost(), dataMaturity),\n etherPrice_: _updateGasParameter(current.etherPrice(), incoming.etherPrice(), dataMaturity),\n markup_: _updateGasParameter(current.markup(), incoming.markup(), dataMaturity)\n });\n wasUpdated = GasData.unwrap(updatedGasData) != GasData.unwrap(current);\n }\n\n /// @dev Returns the updated value for the gas parameter, given the maturity of the incoming data.\n function _updateGasParameter(Number current, Number incoming, uint256 dataMaturity)\n internal\n pure\n returns (Number updatedParameter)\n {\n // We apply the incoming value only if its optimistic period has passed.\n // The optimistic period is smaller when the the value is increasing, and bigger when it is decreasing.\n if (incoming.decompress() \u003e current.decompress()) {\n return dataMaturity \u003c GAS_DATA_INCREASED_OPTIMISTIC_PERIOD ? current : incoming;\n } else {\n return dataMaturity \u003c GAS_DATA_DECREASED_OPTIMISTIC_PERIOD ? current : incoming;\n }\n }\n}\n","language":"Solidity","languageVersion":"0.8.17","compilerVersion":"0.8.17","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[{"inputs":[],"name":"IncorrectVersionLength","type":"error"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"versionString","type":"string"}],"stateMutability":"view","type":"function"}],"userDoc":{"kind":"user","methods":{},"notice":"Version getter for contracts. Doesn't use any storage slots, meaning it will never cause any troubles with the upgradeable contracts. For instance, this contract can be added or removed from the inheritance chain without shifting the storage layout.","version":1},"developerDoc":{"kind":"dev","methods":{},"stateVariables":{"_data":{"details":"Bytes representation of the \"version string\". Strings with length over 32 are not supported!"},"_length":{"details":"Length of the \"version string\""}},"title":"Versioned","version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.17+commit.8df45f5f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"name\":\"IncorrectVersionLength\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"version\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"versionString\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"stateVariables\":{\"_data\":{\"details\":\"Bytes representation of the \\\"version string\\\". Strings with length over 32 are not supported!\"},\"_length\":{\"details\":\"Length of the \\\"version string\\\"\"}},\"title\":\"Versioned\",\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"notice\":\"Version getter for contracts. Doesn't use any storage slots, meaning it will never cause any troubles with the upgradeable contracts. For instance, this contract can be added or removed from the inheritance chain without shifting the storage layout.\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"solidity/GasOracle.sol\":\"Versioned\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"solidity/GasOracle.sol\":{\"keccak256\":\"0x5519f6e5735cf6c46ad68b17e9928129dc35414c8e5f3275cfc6f5f668fd8c5d\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://adada79301e8724611ab57337885a3563c50b064ba0587cedfc13bbdd9005931\",\"dweb:/ipfs/QmfKmx4jqG3aZ1zNSkJBPPELk92n21Lcck1r8hJmpzQnLb\"]}},\"version\":1}"},"hashes":{"version()":"54fd4d50"}}}