Gav Wood
10 years ago
11 changed files with 484 additions and 233 deletions
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/*
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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 TransactionBase.cpp
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* @author Gav Wood <i@gavwood.com> |
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* @date 2014 |
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*/ |
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#include <libdevcore/vector_ref.h> |
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#include <libdevcore/Log.h> |
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#include <libdevcore/CommonIO.h> |
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#include <libdevcrypto/Common.h> |
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#include <libethcore/Exceptions.h> |
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#include "Transaction.h" |
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using namespace std; |
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using namespace dev; |
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using namespace dev::eth; |
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TransactionBase::TransactionBase(bytesConstRef _rlpData, CheckTransaction _checkSig) |
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{ |
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int field = 0; |
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RLP rlp(_rlpData); |
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try |
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{ |
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if (!rlp.isList()) |
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BOOST_THROW_EXCEPTION(InvalidTransactionFormat() << errinfo_comment("transaction RLP must be a list")); |
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m_nonce = rlp[field = 0].toInt<u256>(); |
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m_gasPrice = rlp[field = 1].toInt<u256>(); |
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m_gas = rlp[field = 2].toInt<u256>(); |
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m_type = rlp[field = 3].isEmpty() ? ContractCreation : MessageCall; |
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m_receiveAddress = rlp[field = 3].isEmpty() ? Address() : rlp[field = 3].toHash<Address>(RLP::VeryStrict); |
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m_value = rlp[field = 4].toInt<u256>(); |
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if (!rlp[field = 5].isData()) |
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BOOST_THROW_EXCEPTION(InvalidTransactionFormat() << errinfo_comment("transaction data RLP must be an array")); |
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m_data = rlp[field = 5].toBytes(); |
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byte v = rlp[field = 6].toInt<byte>() - 27; |
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h256 r = rlp[field = 7].toInt<u256>(); |
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h256 s = rlp[field = 8].toInt<u256>(); |
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if (rlp.itemCount() > 9) |
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BOOST_THROW_EXCEPTION(InvalidTransactionFormat() << errinfo_comment("to many fields in the transaction RLP")); |
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m_vrs = SignatureStruct{ r, s, v }; |
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if (_checkSig >= CheckTransaction::Cheap && !m_vrs.isValid()) |
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BOOST_THROW_EXCEPTION(InvalidSignature()); |
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if (_checkSig == CheckTransaction::Everything) |
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m_sender = sender(); |
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} |
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catch (Exception& _e) |
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{ |
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_e << errinfo_name("invalid transaction format") << BadFieldError(field, toHex(rlp[field].data().toBytes())); |
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throw; |
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} |
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} |
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Address const& TransactionBase::safeSender() const noexcept |
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{ |
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try |
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{ |
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return sender(); |
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} |
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catch (...) |
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{ |
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cwarn << "safeSender() did throw an exception: " << boost::current_exception_diagnostic_information(); |
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return ZeroAddress; |
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} |
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} |
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Address const& TransactionBase::sender() const |
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{ |
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if (!m_sender) |
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{ |
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auto p = recover(m_vrs, sha3(WithoutSignature)); |
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if (!p) |
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BOOST_THROW_EXCEPTION(InvalidSignature()); |
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m_sender = right160(dev::sha3(bytesConstRef(p.data(), sizeof(p)))); |
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} |
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return m_sender; |
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} |
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void TransactionBase::sign(Secret const& _priv) |
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{ |
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auto sig = dev::sign(_priv, sha3(WithoutSignature)); |
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SignatureStruct sigStruct = *(SignatureStruct const*)&sig; |
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if (sigStruct.isValid()) |
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m_vrs = sigStruct; |
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} |
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void TransactionBase::streamRLP(RLPStream& _s, IncludeSignature _sig) const |
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{ |
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if (m_type == NullTransaction) |
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return; |
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_s.appendList((_sig ? 3 : 0) + 6); |
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_s << m_nonce << m_gasPrice << m_gas; |
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if (m_type == MessageCall) |
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_s << m_receiveAddress; |
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else |
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_s << ""; |
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_s << m_value << m_data; |
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if (_sig) |
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_s << (m_vrs.v + 27) << (u256)m_vrs.r << (u256)m_vrs.s; |
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} |
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@ -0,0 +1,177 @@ |
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/*
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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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|
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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 TransactionBase.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 <libdevcore/SHA3.h> |
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#include <libethcore/Common.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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enum class CheckTransaction |
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{ |
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None, |
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Cheap, |
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Everything |
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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 TransactionBase |
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{ |
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public: |
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/// Constructs a null transaction.
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TransactionBase() {} |
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/// Constructs a signed message-call transaction.
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TransactionBase(u256 const& _value, u256 const& _gasPrice, u256 const& _gas, Address const& _dest, bytes const& _data, u256 const& _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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TransactionBase(u256 const& _value, u256 const& _gasPrice, u256 const& _gas, bytes const& _data, u256 const& _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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TransactionBase(u256 const& _value, u256 const& _gasPrice, u256 const& _gas, Address const& _dest, bytes const& _data, u256 const& _nonce = 0): m_type(MessageCall), m_nonce(_nonce), 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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TransactionBase(u256 const& _value, u256 const& _gasPrice, u256 const& _gas, bytes const& _data, u256 const& _nonce = 0): m_type(ContractCreation), m_nonce(_nonce), 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 TransactionBase(bytesConstRef _rlp, CheckTransaction _checkSig); |
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/// Constructs a transaction from the given RLP.
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explicit TransactionBase(bytes const& _rlp, CheckTransaction _checkSig): TransactionBase(&_rlp, _checkSig) {} |
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/// Checks equality of transactions.
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bool operator==(TransactionBase 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!=(TransactionBase 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 const& 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 const& safeSender() const noexcept; |
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/// Force the sender to a particular value. This will result in an invalid transaction RLP.
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void forceSender(Address const& _a) { m_sender = _a; } |
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/// @returns true if transaction is non-null.
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explicit 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 { if (_sig == WithSignature && m_hashWith) return m_hashWith; RLPStream s; streamRLP(s, _sig); auto ret = dev::sha3(s.out()); if (_sig == WithSignature) m_hashWith = ret; return ret; } |
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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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/// Synonym for receiveAddress().
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Address to() const { return m_receiveAddress; } |
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/// Synonym for safeSender().
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Address from() const { return safeSender(); } |
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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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void sign(Secret const& _priv); ///< Sign the transaction.
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protected: |
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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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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 h256 m_hashWith; ///< Cached hash of transaction with signature.
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mutable Address m_sender; ///< Cached sender, determined from signature.
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mutable bigint m_gasRequired = 0; ///< Memoised amount required for the transaction to run.
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}; |
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/// Nice name for vector of Transaction.
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using TransactionBases = std::vector<TransactionBase>; |
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/// Simple human-readable stream-shift operator.
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inline std::ostream& operator<<(std::ostream& _out, TransactionBase const& _t) |
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{ |
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_out << _t.sha3().abridged() << "{"; |
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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.data().size() << "$" << _t.value() << "+" << _t.gas() << "@" << _t.gasPrice(); |
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_out << "<-" << _t.safeSender().abridged() << " #" << _t.nonce() << "}"; |
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return _out; |
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} |
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} |
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} |
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