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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.cpp
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#include <libdevcore/vector_ref.h>
#include <libdevcore/Log.h>
#include <libdevcrypto/Common.h>
#include <libethcore/Exceptions.h>
#include "Transaction.h"
using namespace std;
using namespace dev;
using namespace dev::eth;
#define ETH_ADDRESS_DEBUG 0
Transaction::Transaction(bytesConstRef _rlpData, bool _checkSender)
{
int field = 0;
RLP rlp(_rlpData);
try
{
nonce = rlp[field = 0].toInt<u256>();
gasPrice = rlp[field = 1].toInt<u256>();
gas = rlp[field = 2].toInt<u256>();
type = rlp[field = 3].isEmpty() ? ContractCreation : MessageCall;
receiveAddress = rlp[field = 3].toHash<Address>();
value = rlp[field = 4].toInt<u256>();
data = rlp[field = 5].toBytes();
vrs = SignatureStruct{ rlp[field = 7].toInt<u256>(), rlp[field = 8].toInt<u256>(), byte(rlp[field = 6].toInt<byte>() - 27) };
if (_checkSender)
m_sender = sender();
}
catch (Exception & _e)
{
_e << errinfo_name("invalid transaction format") << BadFieldError(field,toHex(rlp[field].data().toBytes()));
throw;
}
}
Address Transaction::safeSender() const noexcept
{
try
{
return sender();
}
catch (...)
{
cwarn << "safeSender() did throw an exception: " << boost::current_exception_diagnostic_information();
return Address();
}
}
Address Transaction::sender() const
{
if (!m_sender)
{
auto p = recover(*(Signature const*)&vrs, sha3(false));
if (!p)
BOOST_THROW_EXCEPTION(InvalidSignature());
m_sender = right160(dev::sha3(bytesConstRef(p.data(), sizeof(p))));
}
return m_sender;
}
void Transaction::sign(Secret _priv)
{
auto sig = dev::sign(_priv, sha3(false));
vrs = *(SignatureStruct const*)&sig;
}
void Transaction::streamRLP(RLPStream& _s, bool _sig) const
{
_s.appendList((_sig ? 3 : 0) + 6);
_s << nonce << gasPrice << gas;
if (type == MessageCall)
_s << receiveAddress;
else
_s << "";
_s << value << data;
if (_sig)
_s << (vrs.v + 27) << (u256)vrs.r << (u256)vrs.s;
}