lib/ethereum/client.rb
module Ethereum
class Client
DEFAULT_GAS_LIMIT = 4_000_000
DEFAULT_GAS_PRICE = 22_000_000_000
# https://github.com/ethereum/wiki/wiki/JSON-RPC
RPC_COMMANDS = %w(web3_clientVersion web3_sha3 net_version net_peerCount net_listening eth_protocolVersion eth_syncing eth_coinbase eth_mining eth_hashrate eth_gasPrice eth_accounts eth_blockNumber eth_getBalance eth_getStorageAt eth_getTransactionCount eth_getBlockTransactionCountByHash eth_getBlockTransactionCountByNumber eth_getUncleCountByBlockHash eth_getUncleCountByBlockNumber eth_getCode eth_sign eth_sendTransaction eth_sendRawTransaction eth_call eth_estimateGas eth_getBlockByHash eth_getBlockByNumber eth_getTransactionByHash eth_getTransactionByBlockHashAndIndex eth_getTransactionByBlockNumberAndIndex eth_getTransactionReceipt eth_getUncleByBlockHashAndIndex eth_getUncleByBlockNumberAndIndex eth_getCompilers eth_compileLLL eth_compileSolidity eth_compileSerpent eth_newFilter eth_newBlockFilter eth_newPendingTransactionFilter eth_uninstallFilter eth_getFilterChanges eth_getFilterLogs eth_getLogs eth_getWork eth_submitWork eth_submitHashrate db_putString db_getString db_putHex db_getHex shh_post shh_version shh_newIdentity shh_hasIdentity shh_newGroup shh_addToGroup shh_newFilter shh_uninstallFilter shh_getFilterChanges shh_getMessages)
# https://github.com/ethereum/go-ethereum/wiki/Management-APIs
RPC_MANAGEMENT_COMMANDS = %w(admin_addPeer admin_datadir admin_nodeInfo admin_peers admin_setSolc admin_startRPC admin_startWS admin_stopRPC admin_stopWS debug_backtraceAt debug_blockProfile debug_cpuProfile debug_dumpBlock debug_gcStats debug_getBlockRlp debug_goTrace debug_memStats debug_seedHash debug_setHead debug_setBlockProfileRate debug_stacks debug_startCPUProfile debug_startGoTrace debug_stopCPUProfile debug_stopGoTrace debug_traceBlock debug_traceBlockByNumber debug_traceBlockByHash debug_traceBlockFromFile debug_traceTransaction debug_verbosity debug_vmodule debug_writeBlockProfile debug_writeMemProfile miner_hashrate miner_makeDAG miner_setExtra miner_setGasPrice miner_start miner_startAutoDAG miner_stop miner_stopAutoDAG personal_importRawKey personal_listAccounts personal_lockAccount personal_newAccount personal_unlockAccount personal_sendTransaction txpool_content txpool_inspect txpool_status)
attr_accessor :command, :id, :log, :logger, :default_account, :gas_price, :gas_limit
def initialize(log = false)
@id = 0
@log = log
@batch = nil
@formatter = Ethereum::Formatter.new
@gas_price = DEFAULT_GAS_PRICE
@gas_limit = DEFAULT_GAS_LIMIT
if @log == true
@logger = Logger.new("/tmp/ethereum_ruby_http.log")
end
end
def self.create(host_or_ipcpath, log = false)
return IpcClient.new(host_or_ipcpath, log) if host_or_ipcpath.end_with? '.ipc'
return HttpClient.new(host_or_ipcpath, log) if host_or_ipcpath.start_with? 'http'
raise ArgumentError.new('Unable to detect client type')
end
def batch
@batch = []
yield
result = send_batch(@batch)
@batch = nil
reset_id
return result
end
def get_id
@id += 1
return @id
end
def reset_id
@id = 0
end
def default_account
@default_account ||= eth_accounts["result"][0]
end
def int_to_hex(p)
p.is_a?(Integer) ? "0x#{p.to_s(16)}" : p
end
def encode_params(params)
params.map(&method(:int_to_hex))
end
def get_balance(address)
eth_get_balance(address)["result"].to_i(16)
end
def get_chain
@net_version ||= net_version["result"].to_i
end
def get_nonce(address)
eth_get_transaction_count(address, "pending")["result"].to_i(16)
end
def transfer_to(address, amount)
eth_send_transaction({to: address, value: int_to_hex(amount)})
end
def transfer_to_and_wait(address, amount)
wait_for(transfer_to(address, amount)["result"])
end
def transfer(key, address, amount)
Eth.configure { |c| c.chain_id = net_version["result"].to_i }
args = {
from: key.address,
to: address,
value: amount,
data: "",
nonce: get_nonce(key.address),
gas_limit: gas_limit,
gas_price: gas_price
}
tx = Eth::Tx.new(args)
tx.sign key
eth_send_raw_transaction(tx.hex)["result"]
end
def transfer_and_wait(key, address, amount)
return wait_for(transfer(key, address, amount))
end
def wait_for(tx)
transaction = Ethereum::Transaction.new(tx, self, "", [])
transaction.wait_for_miner
return transaction
end
def send_command(command,args)
if ["eth_getBalance", "eth_call"].include?(command)
args << "latest"
end
payload = {jsonrpc: "2.0", method: command, params: encode_params(args), id: get_id}
@logger.info("Sending #{payload.to_json}") if @log
if @batch
@batch << payload
return true
else
output = JSON.parse(send_single(payload.to_json))
@logger.info("Received #{output.to_json}") if @log
reset_id
raise IOError, output["error"]["message"] if output["error"]
return output
end
end
(RPC_COMMANDS + RPC_MANAGEMENT_COMMANDS).each do |rpc_command|
method_name = rpc_command.underscore
define_method method_name do |*args|
send_command(rpc_command, args)
end
end
end
end