services/explorer/contracts/messagebus/testmessagebus/testmessagebus.contractinfo.json
{"/solidity/TestMessageBusUpgradeable.sol:AddressUpgradeable":{"code":"0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122080a8feece8aebd5a29ba816e7ad476af307ac260e3acdf96fefde8ba65c780f564736f6c63430008000033","runtime-code":"0x73000000000000000000000000000000000000000030146080604052600080fdfea264697066735822122080a8feece8aebd5a29ba816e7ad476af307ac260e3acdf96fefde8ba65c780f564736f6c63430008000033","info":{"source":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"211:3147:0:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;211:3147:0;;;;;;;;;;;;;;;;;","srcMapRuntime":"211:3147:0:-:0;;;;;;;;","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"AddressUpgradeable\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{}},"/solidity/TestMessageBusUpgradeable.sol:ContextChainIdUpgradeable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"ContextChainIdUpgradeable\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{}},"/solidity/TestMessageBusUpgradeable.sol:ContextUpgradeable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"ContextUpgradeable\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{}},"/solidity/TestMessageBusUpgradeable.sol:IAuthVerifier":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","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":"bytes","name":"_authData","type":"bytes"}],"name":"msgAuth","outputs":[{"internalType":"bool","name":"authenticated","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_nodegroup","type":"address"}],"name":"setNodeGroup","outputs":[],"stateMutability":"nonpayable","type":"function"}],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"bytes\",\"name\":\"_authData\",\"type\":\"bytes\"}],\"name\":\"msgAuth\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"authenticated\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_nodegroup\",\"type\":\"address\"}],\"name\":\"setNodeGroup\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"IAuthVerifier\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{"msgAuth(bytes)":"8b1b3a2d","setNodeGroup(address)":"f6ea2c90"}},"/solidity/TestMessageBusUpgradeable.sol:IGasFeePricing":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","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":"uint256","name":"_dstChainId","type":"uint256"},{"internalType":"bytes","name":"_options","type":"bytes"}],"name":"estimateGasFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_dstChainId","type":"uint256"},{"internalType":"uint256","name":"_gasUnitPrice","type":"uint256"},{"internalType":"uint256","name":"_gasTokenPriceRatio","type":"uint256"}],"name":"setCostPerChain","outputs":[],"stateMutability":"nonpayable","type":"function"}],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_dstChainId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_options\",\"type\":\"bytes\"}],\"name\":\"estimateGasFee\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_dstChainId\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_gasUnitPrice\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_gasTokenPriceRatio\",\"type\":\"uint256\"}],\"name\":\"setCostPerChain\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"IGasFeePricing\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{"estimateGasFee(uint256,bytes)":"47feadc1","setCostPerChain(uint256,uint256,uint256)":"e32192b7"}},"/solidity/TestMessageBusUpgradeable.sol:ISynMessagingReceiver":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","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":"bytes32","name":"_srcAddress","type":"bytes32"},{"internalType":"uint256","name":"_srcChainId","type":"uint256"},{"internalType":"bytes","name":"_message","type":"bytes"},{"internalType":"address","name":"_executor","type":"address"}],"name":"executeMessage","outputs":[],"stateMutability":"nonpayable","type":"function"}],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"_srcAddress\",\"type\":\"bytes32\"},{\"internalType\":\"uint256\",\"name\":\"_srcChainId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_message\",\"type\":\"bytes\"},{\"internalType\":\"address\",\"name\":\"_executor\",\"type\":\"address\"}],\"name\":\"executeMessage\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"ISynMessagingReceiver\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{"executeMessage(bytes32,uint256,bytes,address)":"a6060871"}},"/solidity/TestMessageBusUpgradeable.sol:Initializable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, ../","srcMap":"","srcMapRuntime":"","abiDefinition":[],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"Initializable\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{}},"/solidity/TestMessageBusUpgradeable.sol:MessageBusReceiverUpgradeable":{"code":"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SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, 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MessageBusReceiverUpgradeable.TxStatus\",\"name\":\"_status\",\"type\":\"uint8\"}],\"name\":\"updateMessageStatus\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"MessageBusReceiverUpgradeable\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{"authVerifier()":"c4087335","executeMessage(uint256,bytes32,address,uint256,uint256,bytes,bytes32)":"a1b058d8","getExecutedMessage(bytes32)":"25b19fa3","owner()":"8da5cb5b","paused()":"5c975abb","renounceOwnership()":"715018a6","transferOwnership(address)":"f2fde38b","updateAuthVerifier(address)":"a5c0edf3","updateMessageStatus(bytes32,uint8)":"9b11079c"}},"/solidity/TestMessageBusUpgradeable.sol:MessageBusSenderUpgradeable":{"code":"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SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, 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SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, 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MessageBusReceiverUpgradeable.TxStatus\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_gasFeePricing\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_authVerifier\",\"type\":\"address\"}],\"name\":\"initialize\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"nonce\",\"outputs\":[{\"internalType\":\"uint64\",\"name\":\"\",\"type\":\"uint64\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"pause\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"paused\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address payable\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"rescueGas\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"_receiver\",\"type\":\"bytes32\"},{\"internalType\":\"uint256\",\"name\":\"_dstChainId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_message\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"_options\",\"type\":\"bytes\"},{\"internalType\":\"address payable\",\"name\":\"_refundAddress\",\"type\":\"address\"}],\"name\":\"sendMessage\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"_receiver\",\"type\":\"bytes32\"},{\"internalType\":\"uint256\",\"name\":\"_dstChainId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_message\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"_options\",\"type\":\"bytes\"}],\"name\":\"sendMessage\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"unpause\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_authVerifier\",\"type\":\"address\"}],\"name\":\"updateAuthVerifier\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_gasFeePricing\",\"type\":\"address\"}],\"name\":\"updateGasFeePricing\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"_messageId\",\"type\":\"bytes32\"},{\"internalType\":\"enum MessageBusReceiverUpgradeable.TxStatus\",\"name\":\"_status\",\"type\":\"uint8\"}],\"name\":\"updateMessageStatus\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address 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SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","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":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":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"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\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"OwnableUpgradeable\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{"owner()":"8da5cb5b","renounceOwnership()":"715018a6","transferOwnership(address)":"f2fde38b"}},"/solidity/TestMessageBusUpgradeable.sol:PausableUpgradeable":{"code":"0x","runtime-code":"0x","info":{"source":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","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":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}],"userDoc":{"kind":"user","methods":{},"version":1},"developerDoc":{"kind":"dev","methods":{},"version":1},"metadata":"{\"compiler\":{\"version\":\"0.8.0+commit.c7dfd78e\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"Paused\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"Unpaused\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"paused\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/solidity/TestMessageBusUpgradeable.sol\":\"PausableUpgradeable\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":10000},\"remappings\":[]},\"sources\":{\"/solidity/TestMessageBusUpgradeable.sol\":{\"keccak256\":\"0xeda9aefb9403c7cd0f33595c8d0c179efc9bdd80161dad2ed11dc3a416f5d5e5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://4471f68335870d11115ab0c5e7f55da7e907488078d78a8bf12d8165b75b9e78\",\"dweb:/ipfs/QmbDrr3KYwFZVhc5aQfJbCqMmyDdgMDcoqkRjHMeAfzZZL\"]}},\"version\":1}"},"hashes":{"paused()":"5c975abb"}},"/solidity/TestMessageBusUpgradeable.sol:TestMessageBusUpgradeable":{"code":"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SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.0;\n\n\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\n\n\n\nlibrary AddressUpgradeable {\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 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 function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\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 function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\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 // 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\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\nabstract contract Initializable {\n\n bool private _initialized;\n\n\n bool private _initializing;\n\n\n modifier initializer() {\n // If the contract is initializing we ignore whether _initialized is set in order to support multiple\n // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the\n // contract may have been reentered.\n require(_initializing ? _isConstructor() : !_initialized, \"Initializable: contract is already initialized\");\n\n bool isTopLevelCall = !_initializing;\n if (isTopLevelCall) {\n _initializing = true;\n _initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n _initializing = false;\n }\n }\n\n\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n function _isConstructor() private view returns (bool) {\n return !AddressUpgradeable.isContract(address(this));\n }\n}\n\n\n\n\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\n\n\n\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\n\n\n\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 uint256[50] private __gap;\n}\n\n\n\n\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\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 function owner() public view virtual returns (address) {\n return _owner;\n }\n\n\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\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 function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n\n\n uint256[49] private __gap;\n}\n\n\n// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)\n\n\n\n\n\n\nabstract contract PausableUpgradeable is Initializable, ContextUpgradeable {\n\n event Paused(address account);\n\n event Unpaused(address account);\n\n bool private _paused;\n\n\n function __Pausable_init() internal onlyInitializing {\n __Pausable_init_unchained();\n }\n\n function __Pausable_init_unchained() internal onlyInitializing {\n _paused = false;\n }\n\n\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n\n modifier whenNotPaused() {\n require(!paused(), \"Pausable: paused\");\n _;\n }\n\n\n modifier whenPaused() {\n require(paused(), \"Pausable: not paused\");\n _;\n }\n\n\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n\n uint256[49] private __gap;\n}\n\n\n\n\n\n\ninterface IGasFeePricing {\n\n function setCostPerChain(\n uint256 _dstChainId,\n uint256 _gasUnitPrice,\n uint256 _gasTokenPriceRatio\n ) external;\n\n\n function estimateGasFee(uint256 _dstChainId, bytes calldata _options) external returns (uint256);\n}\n\n\n\n\n\n\n\nabstract contract ContextChainIdUpgradeable is Initializable {\n function __ContextChainId_init() internal onlyInitializing {}\n\n function __ContextChainId_init_unchained() internal onlyInitializing {}\n\n function _chainId() internal view virtual returns (uint256) {\n return block.chainid;\n }\n\n\n uint256[50] private __gap;\n}\n\n\ncontract MessageBusSenderUpgradeable is OwnableUpgradeable, PausableUpgradeable, ContextChainIdUpgradeable {\n address public gasFeePricing;\n uint64 public nonce;\n uint256 public fees;\n\n function __MessageBusSender_init(address _gasFeePricing) internal onlyInitializing {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n }\n\n function __MessageBusSender_init_unchained(address _gasFeePricing) internal onlyInitializing {\n gasFeePricing = _gasFeePricing;\n }\n\n event MessageSent(\n address indexed sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 indexed dstChainId,\n bytes message,\n uint64 nonce,\n bytes options,\n uint256 fee,\n bytes32 indexed messageId\n );\n\n function computeMessageId(\n address _srcAddress,\n uint256 _srcChainId,\n bytes32 _dstAddress,\n uint256 _dstChainId,\n uint256 _srcNonce,\n bytes calldata _message\n ) public pure returns (bytes32) {\n return keccak256(abi.encode(_srcAddress, _srcChainId, _dstAddress, _dstChainId, _srcNonce, _message));\n }\n\n function estimateFee(uint256 _dstChainId, bytes calldata _options) public returns (uint256) {\n uint256 fee = IGasFeePricing(gasFeePricing).estimateGasFee(_dstChainId, _options);\n require(fee != 0, \"Fee not set\");\n return fee;\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options\n ) external payable whenNotPaused {\n // use tx.origin for gas refund by default, so that older contracts,\n // interacting with MessageBus that don't have a fallback/receive\n // (i.e. not able to receive gas), will continue to work\n _sendMessage(_receiver, _dstChainId, _message, _options, payable(tx.origin));\n }\n\n function sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) external payable {\n _sendMessage(_receiver, _dstChainId, _message, _options, _refundAddress);\n }\n\n function _sendMessage(\n bytes32 _receiver,\n uint256 _dstChainId,\n bytes calldata _message,\n bytes calldata _options,\n address payable _refundAddress\n ) internal {\n uint256 srcChainId = _chainId();\n require(_dstChainId != srcChainId, \"Invalid chainId\");\n uint256 fee = estimateFee(_dstChainId, _options);\n require(msg.value \u003e= fee, \"Insufficient gas fee\");\n bytes32 msgId = computeMessageId(msg.sender, srcChainId, _receiver, _dstChainId, nonce, _message);\n emit MessageSent(msg.sender, srcChainId, _receiver, _dstChainId, _message, nonce, _options, fee, msgId);\n fees += fee;\n ++nonce;\n // refund gas fees in case of overpayment\n if (msg.value \u003e fee) {\n _refundAddress.transfer(msg.value - fee);\n }\n }\n\n\n function withdrawGasFees(address payable to) external onlyOwner {\n uint256 withdrawAmount = fees;\n // Reset fees to 0\n to.transfer(withdrawAmount);\n delete fees;\n }\n\n\n function rescueGas(address payable to) external onlyOwner {\n uint256 withdrawAmount = address(this).balance - fees;\n to.transfer(withdrawAmount);\n }\n\n function updateGasFeePricing(address _gasFeePricing) external onlyOwner {\n require(_gasFeePricing != address(0), \"Cannot set to 0\");\n gasFeePricing = _gasFeePricing;\n }\n\n\n uint256[47] private __gap;\n}\n\n\n\n\n\n\n\n\n\n\n\n\ninterface IAuthVerifier {\n\n function msgAuth(bytes calldata _authData) external view returns (bool authenticated);\n\n\n function setNodeGroup(address _nodegroup) external;\n}\n\n\n\n\n\ninterface ISynMessagingReceiver {\n // Maps chain ID to the bytes32 trusted addresses allowed to be source senders\n // mapping(uint256 =\u003e bytes32) internal trustedRemoteLookup;\n\n\n function executeMessage(\n bytes32 _srcAddress,\n uint256 _srcChainId,\n bytes calldata _message,\n address _executor\n ) external;\n}\n\n\ncontract MessageBusReceiverUpgradeable is OwnableUpgradeable, PausableUpgradeable {\n enum TxStatus {\n Null,\n Success,\n Fail\n }\n\n // TODO: Rename to follow one standard convention -\u003e Send -\u003e Receive?\n event Executed(\n bytes32 indexed messageId,\n TxStatus status,\n address indexed _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n );\n event CallReverted(string reason);\n\n address public authVerifier;\n\n // Store all successfully executed messages\n mapping(bytes32 =\u003e TxStatus) internal executedMessages;\n\n function __MessageBusReceiver_init(address _authVerifier) internal {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n function __MessageBusReceiver_init_unchained(address _authVerifier) internal {\n authVerifier = _authVerifier;\n }\n\n function getExecutedMessage(bytes32 _messageId) external view returns (TxStatus) {\n return executedMessages[_messageId];\n }\n\n\n function executeMessage(\n uint256 _srcChainId,\n bytes32 _srcAddress,\n address _dstAddress,\n uint256 _gasLimit,\n uint256 _nonce,\n bytes calldata _message,\n bytes32 _messageId\n ) external whenNotPaused {\n // In order to guarantee that an individual message is only executed once, a messageId is passed\n // enforce that this message ID hasn't already been tried ever\n require(executedMessages[_messageId] == TxStatus.Null, \"Message already executed\");\n // Authenticate executeMessage, will revert if not authenticated\n IAuthVerifier(authVerifier).msgAuth(abi.encode(msg.sender));\n\n TxStatus status;\n try\n ISynMessagingReceiver(_dstAddress).executeMessage{gas: _gasLimit}(\n _srcAddress,\n _srcChainId,\n _message,\n msg.sender\n )\n {\n // Assuming success state if no revert\n status = TxStatus.Success;\n } catch (bytes memory reason) {\n // call hard reverted \u0026 failed\n emit CallReverted(_getRevertMsg(reason));\n status = TxStatus.Fail;\n }\n\n executedMessages[_messageId] = status;\n emit Executed(_messageId, status, _dstAddress, uint64(_srcChainId), uint64(_nonce));\n }\n\n\n // https://ethereum.stackexchange.com/a/83577\n // https://github.com/Uniswap/v3-periphery/blob/v1.0.0/contracts/base/Multicall.sol\n function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {\n // If the _res length is less than 68, then the transaction failed silently (without a revert message)\n if (_returnData.length \u003c 68) return \"Transaction reverted silently\";\n // solhint-disable-next-line\n assembly {\n // Slice the sighash.\n _returnData := add(_returnData, 0x04)\n }\n return abi.decode(_returnData, (string)); // All that remains is the revert string\n }\n\n\n\n function updateMessageStatus(bytes32 _messageId, TxStatus _status) external onlyOwner {\n executedMessages[_messageId] = _status;\n }\n\n function updateAuthVerifier(address _authVerifier) external onlyOwner {\n require(_authVerifier != address(0), \"Cannot set to 0\");\n authVerifier = _authVerifier;\n }\n\n uint256[48] private __gap;\n}\n\n\ncontract MessageBusUpgradeable is MessageBusSenderUpgradeable, MessageBusReceiverUpgradeable {\n function initialize(address _gasFeePricing, address _authVerifier) external initializer {\n __Ownable_init_unchained();\n __Pausable_init_unchained();\n __MessageBusSender_init_unchained(_gasFeePricing);\n __MessageBusReceiver_init_unchained(_authVerifier);\n }\n\n // PAUSABLE FUNCTIONS ***/\n function pause() external onlyOwner {\n _pause();\n }\n\n function unpause() external onlyOwner {\n _unpause();\n }\n}\n\n\n\n\n\ncontract TestMessageBusUpgradeable is MessageBusUpgradeable {\n\n function testExecuted(\n bytes32 messageId,\n TxStatus status,\n address _dstAddress,\n uint64 srcChainId,\n uint64 srcNonce\n ) external {\n emit Executed(\n messageId,\n status,\n _dstAddress,\n srcChainId,\n srcNonce\n );\n }\n function testMessageSent(\n address sender,\n uint256 srcChainID,\n bytes32 receiver,\n uint256 dstChainId,\n bytes calldata message,\n uint64 nonce,\n bytes calldata options,\n uint256 fee,\n bytes32 messageId\n ) external {\n emit MessageSent(\n sender,\n srcChainID,\n receiver,\n dstChainId,\n message,\n nonce,\n options,\n fee,\n messageId\n );\n }\n function testCallReverted(\n string calldata reason\n ) external {\n emit CallReverted(\n reason\n );\n }\n}\n\n\n\n","language":"Solidity","languageVersion":"0.8.0","compilerVersion":"0.8.0","compilerOptions":"--combined-json bin,bin-runtime,srcmap,srcmap-runtime,abi,userdoc,devdoc,metadata,hashes --optimize --optimize-runs 10000 --allow-paths ., ./, 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