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108 lines
3.6 KiB
108 lines
3.6 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 BlockInfo.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 "BlockHeader.h"
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#include <libdevcore/Common.h>
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#include <libdevcore/Log.h>
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#include <libdevcore/RLP.h>
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#include "EthashAux.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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BlockHeader::BlockHeader(bytesConstRef _block)
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{
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RLP header = extractHeader(_block);
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populateFromHeader(header);
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}
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h256 const& BlockHeader::boundary() const
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{
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if (!m_boundary && m_difficulty)
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m_boundary = (h256)(u256)((bigint(1) << 256) / m_difficulty);
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return m_boundary;
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}
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h256 const& BlockHeader::hashWithout() const
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{
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if (!m_hashWithout)
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{
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RLPStream s(BasicFields);
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streamRLPFields(s);
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m_hashWithout = sha3(s.out());
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}
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return m_hashWithout;
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}
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void BlockHeader::streamRLPFields(RLPStream& _s) const
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{
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_s << m_parentHash << m_sha3Uncles << m_coinbaseAddress << m_stateRoot << m_transactionsRoot << m_receiptsRoot << m_logBloom
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<< m_difficulty << m_number << m_gasLimit << m_gasUsed << m_timestamp << m_extraData;
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}
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RLP BlockHeader::extractHeader(bytesConstRef _block)
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{
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RLP root(_block);
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if (!root.isList())
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BOOST_THROW_EXCEPTION(InvalidBlockFormat() << errinfo_comment("block needs to be a list") << BadFieldError(0, _block.toString()));
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RLP header = root[0];
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if (!header.isList())
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BOOST_THROW_EXCEPTION(InvalidBlockFormat() << errinfo_comment("block header needs to be a list") << BadFieldError(0, header.data().toString()));
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if (!root[1].isList())
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BOOST_THROW_EXCEPTION(InvalidBlockFormat() << errinfo_comment("block transactions need to be a list") << BadFieldError(1, root[1].data().toString()));
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if (!root[2].isList())
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BOOST_THROW_EXCEPTION(InvalidBlockFormat() << errinfo_comment("block uncles need to be a list") << BadFieldError(2, root[2].data().toString()));
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return header;
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}
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void BlockHeader::populateFromHeader(RLP const& _header)
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{
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int field = 0;
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try
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{
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m_parentHash = _header[field = 0].toHash<h256>(RLP::VeryStrict);
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m_sha3Uncles = _header[field = 1].toHash<h256>(RLP::VeryStrict);
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m_coinbaseAddress = _header[field = 2].toHash<Address>(RLP::VeryStrict);
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m_stateRoot = _header[field = 3].toHash<h256>(RLP::VeryStrict);
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m_transactionsRoot = _header[field = 4].toHash<h256>(RLP::VeryStrict);
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m_receiptsRoot = _header[field = 5].toHash<h256>(RLP::VeryStrict);
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m_logBloom = _header[field = 6].toHash<LogBloom>(RLP::VeryStrict);
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m_difficulty = _header[field = 7].toInt<u256>();
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m_number = _header[field = 8].toInt<u256>();
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m_gasLimit = _header[field = 9].toInt<u256>();
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m_gasUsed = _header[field = 10].toInt<u256>();
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m_timestamp = _header[field = 11].toInt<u256>();
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m_extraData = _header[field = 12].toBytes();
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}
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catch (Exception const& _e)
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{
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_e << errinfo_name("invalid block header format") << BadFieldError(field, toHex(_header[field].data().toBytes()));
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throw;
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}
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if (m_number > ~(unsigned)0)
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BOOST_THROW_EXCEPTION(InvalidNumber());
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if (m_gasUsed > m_gasLimit)
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BOOST_THROW_EXCEPTION(TooMuchGasUsed() << RequirementError(bigint(m_gasLimit), bigint(m_gasUsed)));
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}
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