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165 lines
7.0 KiB
165 lines
7.0 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file Transaction.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#pragma once
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#include <libdevcore/RLP.h>
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#include <libdevcrypto/SHA3.h>
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#include <libethcore/CommonEth.h>
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namespace dev
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{
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namespace eth
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{
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/// Named-boolean type to encode whether a signature be included in the serialisation process.
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enum IncludeSignature
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{
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WithoutSignature = 0, ///< Do not include a signature.
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WithSignature = 1, ///< Do include a signature.
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};
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/// Encodes a transaction, ready to be exported to or freshly imported from RLP.
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class Transaction
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{
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public:
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/// Constructs a null transaction.
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Transaction() {}
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/// Constructs a signed message-call transaction.
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Transaction(u256 _value, u256 _gasPrice, u256 _gas, Address const& _dest, bytes const& _data, u256 _nonce, Secret const& _secret): m_type(MessageCall), m_nonce(_nonce), m_value(_value), m_receiveAddress(_dest), m_gasPrice(_gasPrice), m_gas(_gas), m_data(_data) { sign(_secret); }
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/// Constructs a signed contract-creation transaction.
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Transaction(u256 _value, u256 _gasPrice, u256 _gas, bytes const& _data, u256 _nonce, Secret const& _secret): m_type(ContractCreation), m_nonce(_nonce), m_value(_value), m_gasPrice(_gasPrice), m_gas(_gas), m_data(_data) { sign(_secret); }
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/// Constructs an unsigned message-call transaction.
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Transaction(u256 _value, u256 _gasPrice, u256 _gas, Address const& _dest, bytes const& _data): m_type(MessageCall), m_value(_value), m_receiveAddress(_dest), m_gasPrice(_gasPrice), m_gas(_gas), m_data(_data) {}
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/// Constructs an unsigned contract-creation transaction.
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Transaction(u256 _value, u256 _gasPrice, u256 _gas, bytes const& _data): m_type(ContractCreation), m_value(_value), m_gasPrice(_gasPrice), m_gas(_gas), m_data(_data) {}
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/// Constructs a transaction from the given RLP.
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explicit Transaction(bytesConstRef _rlp, bool _checkSender = false);
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/// Constructs a transaction from the given RLP.
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explicit Transaction(bytes const& _rlp, bool _checkSender = false): Transaction(&_rlp, _checkSender) {}
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/// Checks equality of transactions.
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bool operator==(Transaction const& _c) const { return m_type == _c.m_type && (m_type == ContractCreation || m_receiveAddress == _c.m_receiveAddress) && m_value == _c.m_value && m_data == _c.m_data; }
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/// Checks inequality of transactions.
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bool operator!=(Transaction const& _c) const { return !operator==(_c); }
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/// @returns sender of the transaction from the signature (and hash).
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Address sender() const;
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/// Like sender() but will never throw. @returns a null Address if the signature is invalid.
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Address safeSender() const noexcept;
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/// @returns true if transaction is non-null.
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operator bool() const { return m_type != NullTransaction; }
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/// @returns true if transaction is contract-creation.
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bool isCreation() const { return m_type == ContractCreation; }
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/// @returns true if transaction is message-call.
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bool isMessageCall() const { return m_type == MessageCall; }
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/// Serialises this transaction to an RLPStream.
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void streamRLP(RLPStream& _s, IncludeSignature _sig = WithSignature) const;
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/// @returns the RLP serialisation of this transaction.
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bytes rlp(IncludeSignature _sig = WithSignature) const { RLPStream s; streamRLP(s, _sig); return s.out(); }
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/// @returns the SHA3 hash of the RLP serialisation of this transaction.
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h256 sha3(IncludeSignature _sig = WithSignature) const { RLPStream s; streamRLP(s, _sig); return dev::sha3(s.out()); }
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/// @returns the amount of ETH to be transferred by this (message-call) transaction, in Wei. Synonym for endowment().
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u256 value() const { return m_value; }
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/// @returns the amount of ETH to be endowed by this (contract-creation) transaction, in Wei. Synonym for value().
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u256 endowment() const { return m_value; }
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/// @returns the base fee and thus the implied exchange rate of ETH to GAS.
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u256 gasPrice() const { return m_gasPrice; }
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/// @returns the total gas to convert, paid for from sender's account. Any unused gas gets refunded once the contract is ended.
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u256 gas() const { return m_gas; }
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/// @returns the receiving address of the message-call transaction (undefined for contract-creation transactions).
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Address receiveAddress() const { return m_receiveAddress; }
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/// @returns the data associated with this (message-call) transaction. Synonym for initCode().
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bytes const& data() const { return m_data; }
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/// @returns the initialisation code associated with this (contract-creation) transaction. Synonym for data().
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bytes const& initCode() const { return m_data; }
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/// @returns the transaction-count of the sender.
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u256 nonce() const { return m_nonce; }
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/// @returns the signature of the transaction. Encodes the sender.
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SignatureStruct const& signature() const { return m_vrs; }
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private:
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/// Type of transaction.
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enum Type
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{
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NullTransaction, ///< Null transaction.
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ContractCreation, ///< Transaction to create contracts - receiveAddress() is ignored.
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MessageCall ///< Transaction to invoke a message call - receiveAddress() is used.
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};
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void sign(Secret _priv); ///< Sign the transaction.
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Type m_type = NullTransaction; ///< Is this a contract-creation transaction or a message-call transaction?
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u256 m_nonce; ///< The transaction-count of the sender.
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u256 m_value; ///< The amount of ETH to be transferred by this transaction. Called 'endowment' for contract-creation transactions.
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Address m_receiveAddress; ///< The receiving address of the transaction.
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u256 m_gasPrice; ///< The base fee and thus the implied exchange rate of ETH to GAS.
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u256 m_gas; ///< The total gas to convert, paid for from sender's account. Any unused gas gets refunded once the contract is ended.
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bytes m_data; ///< The data associated with the transaction, or the initialiser if it's a creation transaction.
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SignatureStruct m_vrs; ///< The signature of the transaction. Encodes the sender.
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mutable Address m_sender; ///< Cached sender, determined from signature.
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};
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/// Nice name for vector of Transaction.
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using Transactions = std::vector<Transaction>;
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/// Simple human-readable stream-shift operator.
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inline std::ostream& operator<<(std::ostream& _out, Transaction const& _t)
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{
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_out << "{";
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if (_t.receiveAddress())
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_out << _t.receiveAddress().abridged();
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else
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_out << "[CREATE]";
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_out << "/" << _t.nonce() << "$" << _t.value() << "+" << _t.gas() << "@" << _t.gasPrice();
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try
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{
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_out << "<-" << _t.sender().abridged();
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}
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catch (...) {}
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_out << " #" << _t.data().size() << "}";
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return _out;
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}
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}
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}
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