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107 lines
2.7 KiB
107 lines
2.7 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 Ethash.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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* A proof of work algorithm.
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*/
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#pragma once
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#include <chrono>
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#include <thread>
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#include <cstdint>
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#include <libdevcore/CommonIO.h>
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#include "Common.h"
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#include "Miner.h"
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#include "Farm.h"
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#include "Sealer.h"
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class ethash_cl_miner;
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namespace dev
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{
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class RLP;
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class RLPStream;
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namespace eth
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{
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class BlockInfo;
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class EthashCLHook;
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class Ethash
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{
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public:
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static std::string name();
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static unsigned revision();
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static SealEngineFace* createSealEngine();
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using Nonce = h64;
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static void manuallySubmitWork(SealEngineFace* _engine, h256 const& _mixHash, Nonce _nonce);
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static bool isWorking(SealEngineFace* _engine);
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static WorkingProgress workingProgress(SealEngineFace* _engine);
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class BlockHeaderRaw: public BlockInfo
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{
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friend class EthashSealEngine;
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public:
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static const unsigned SealFields = 2;
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bool verify() const;
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bool preVerify() const;
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void prep(std::function<int(unsigned)> const& _f = std::function<int(unsigned)>()) const;
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h256 const& seedHash() const;
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Nonce const& nonce() const { return m_nonce; }
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h256 const& mixHash() const { return m_mixHash; }
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void setNonce(Nonce const& _n) { m_nonce = _n; noteDirty(); }
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void setMixHash(h256 const& _n) { m_mixHash = _n; noteDirty(); }
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StringHashMap jsInfo() const;
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protected:
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BlockHeaderRaw() = default;
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BlockHeaderRaw(BlockInfo const& _bi): BlockInfo(_bi) {}
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void populateFromHeader(RLP const& _header, Strictness _s);
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void populateFromParent(BlockHeaderRaw const& _parent);
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void verifyParent(BlockHeaderRaw const& _parent);
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void clear() { m_mixHash = h256(); m_nonce = Nonce(); }
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void noteDirty() const { m_seedHash = h256(); }
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void streamRLPFields(RLPStream& _s) const { _s << m_mixHash << m_nonce; }
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private:
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Nonce m_nonce;
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h256 m_mixHash;
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mutable h256 m_seedHash;
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mutable h256 m_hash; ///< SHA3 hash of the block header! Not serialised.
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};
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using BlockHeader = BlockHeaderPolished<BlockHeaderRaw>;
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// TODO: Move elsewhere (EthashAux?)
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static void ensurePrecomputed(unsigned _number);
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};
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}
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}
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