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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, CheckSignature _checkSig)
{
int field = 0;
RLP rlp(_rlpData);
try
{
m_nonce = rlp[field = 0].toInt<u256>();
m_gasPrice = rlp[field = 1].toInt<u256>();
m_gas = rlp[field = 2].toInt<u256>();
m_type = rlp[field = 3].isEmpty() ? ContractCreation : MessageCall;
m_receiveAddress = rlp[field = 3].isEmpty() ? Address() : rlp[field = 3].toHash<Address>(RLP::VeryStrict);
m_value = rlp[field = 4].toInt<u256>();
m_data = rlp[field = 5].toBytes();
byte v = rlp[field = 6].toInt<byte>() - 27;
h256 r = rlp[field = 7].toInt<u256>();
h256 s = rlp[field = 8].toInt<u256>();
if (rlp.itemCount() > 9)
BOOST_THROW_EXCEPTION(BadRLP() << errinfo_comment("to many fields in the transaction RLP"));
m_vrs = SignatureStruct{ r, s, v };
if (_checkSig >= CheckSignature::Range && !m_vrs.isValid())
BOOST_THROW_EXCEPTION(InvalidSignature());
if (_checkSig == CheckSignature::Sender)
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(m_vrs, sha3(WithoutSignature));
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(WithoutSignature));
SignatureStruct sigStruct = *(SignatureStruct const*)&sig;
if (sigStruct.isValid())
m_vrs = sigStruct;
}
void Transaction::streamRLP(RLPStream& _s, IncludeSignature _sig) const
{
if (m_type == NullTransaction)
return;
_s.appendList((_sig ? 3 : 0) + 6);
_s << m_nonce << m_gasPrice << m_gas;
if (m_type == MessageCall)
_s << m_receiveAddress;
else
_s << "";
_s << m_value << m_data;
if (_sig)
_s << (m_vrs.v + 27) << (u256)m_vrs.r << (u256)m_vrs.s;
}