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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file Transaction.h
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#pragma once
#include <libdevcore/RLP.h>
#include <libdevcrypto/SHA3.h>
#include <libethcore/CommonEth.h>
namespace dev
{
namespace eth
{
struct Signature
{
byte v;
u256 r;
u256 s;
};
struct Transaction
{
Transaction() {}
Transaction(bytesConstRef _rlp, bool _checkSender = false);
Transaction(bytes const& _rlp, bool _checkSender = false): Transaction(&_rlp, _checkSender) {}
bool operator==(Transaction const& _c) const { return receiveAddress == _c.receiveAddress && value == _c.value && data == _c.data; }
bool operator!=(Transaction const& _c) const { return !operator==(_c); }
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u256 nonce; ///< The transaction-count of the sender.
u256 value; ///< The amount of ETH to be transferred by this transaction. Called 'endowment' for contract-creation transactions.
Address receiveAddress; ///< The receiving address of the transaction.
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u256 gasPrice; ///< The base fee and thus the implied exchange rate of ETH to GAS.
u256 gas; ///< The total gas to convert, paid for from sender's account. Any unused gas gets refunded once the contract is ended.
bytes data; ///< The data associated with the transaction, or the initialiser if it's a creation transaction.
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Signature vrs; ///< The signature of the transaction. Encodes the sender.
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Address safeSender() const noexcept; ///< Like sender() but will never throw.
Address sender() const; ///< Determine the sender of the transaction from the signature (and hash).
void sign(Secret _priv); ///< Sign the transaction.
bool isCreation() const { return !receiveAddress; }
static h256 kFromMessage(h256 _msg, h256 _priv);
void fillStream(RLPStream& _s, bool _sig = true) const;
bytes rlp(bool _sig = true) const { RLPStream s; fillStream(s, _sig); return s.out(); }
std::string rlpString(bool _sig = true) const { return asString(rlp(_sig)); }
h256 sha3(bool _sig = true) const { RLPStream s; fillStream(s, _sig); return dev::eth::sha3(s.out()); }
bytes sha3Bytes(bool _sig = true) const { RLPStream s; fillStream(s, _sig); return dev::eth::sha3Bytes(s.out()); }
private:
mutable Address m_sender;
};
using Transactions = std::vector<Transaction>;
inline std::ostream& operator<<(std::ostream& _out, Transaction const& _t)
{
_out << "{";
if (_t.receiveAddress)
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_out << _t.receiveAddress.abridged();
else
_out << "[CREATE]";
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_out << "/" << _t.nonce << "$" << _t.value << "+" << _t.gas << "@" << _t.gasPrice;
Address s;
try
{
_out << "<-" << _t.sender().abridged();
}
catch (...) {}
_out << " #" << _t.data.size() << "}";
return _out;
}
}
}