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77 lines
2.5 KiB
77 lines
2.5 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 Sealer.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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* Determines the PoW algorithm.
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*/
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#pragma once
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#include <functional>
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#include <libdevcore/Guards.h>
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#include <libdevcore/RLP.h>
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#include "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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class BlockInfo;
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class SealEngineFace
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{
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public:
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virtual ~SealEngineFace() {}
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virtual std::string name() const = 0;
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virtual unsigned revision() const = 0;
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virtual unsigned sealFields() const = 0;
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virtual bytes sealRLP() const = 0;
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bytes option(std::string const& _name) const { Guard l(x_options); return m_options.count(_name) ? m_options.at(_name) : bytes(); }
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bool setOption(std::string const& _name, bytes const& _value) { Guard l(x_options); try { if (onOptionChanging(_name, _value)) { m_options[_name] = _value; return true; } } catch (...) {} return false; }
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virtual strings sealers() const { return { "default" }; }
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virtual void setSealer(std::string const&) {}
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virtual void generateSeal(BlockInfo const& _bi) = 0;
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virtual void onSealGenerated(std::function<void(bytes const& s)> const& _f) = 0;
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virtual void cancelGeneration() {}
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protected:
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virtual bool onOptionChanging(std::string const&, bytes const&) { return true; }
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void injectOption(std::string const& _name, bytes const& _value) { Guard l(x_options); m_options[_name] = _value; }
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private:
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mutable Mutex x_options;
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std::unordered_map<std::string, bytes> m_options;
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};
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template <class Sealer>
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class SealEngineBase: public SealEngineFace
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{
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public:
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std::string name() const override { return Sealer::name(); }
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unsigned revision() const override { return Sealer::revision(); }
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unsigned sealFields() const override { return Sealer::BlockHeader::SealFields; }
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bytes sealRLP() const override { RLPStream s(sealFields()); s.appendRaw(typename Sealer::BlockHeader().sealFieldsRLP(), sealFields()); return s.out(); }
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};
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}
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}
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