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87 lines
2.1 KiB
87 lines
2.1 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 Dagger.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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* Dagger algorithm. Or not.
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*/
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#pragma once
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#include <libethcore/SHA3.h>
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#include "CommonEth.h"
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#define FAKE_DAGGER 1
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namespace eth
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{
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inline uint toLog2(u256 _d)
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{
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return (uint)log2((double)_d);
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}
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struct MineInfo
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{
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double requirement;
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double best;
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uint hashes;
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bool completed;
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};
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#if FAKE_DAGGER
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class Dagger
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{
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public:
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static h256 eval(h256 const& _root, h256 const& _nonce) { h256 b[2] = { _root, _nonce }; return sha3(bytesConstRef((byte const*)&b[0], 64)); }
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static bool verify(h256 const& _root, h256 const& _nonce, u256 const& _difficulty) { return (bigint)(u256)eval(_root, _nonce) <= (bigint(1) << 256) / _difficulty; }
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MineInfo mine(h256& o_solution, h256 const& _root, u256 const& _difficulty, uint _msTimeout = 100, bool const& _continue = bool(true));
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h256 m_last;
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};
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#else
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/// Functions are not re-entrant. If you want to multi-thread, then use different classes for each thread.
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class Dagger
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{
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public:
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Dagger();
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~Dagger();
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static u256 bound(u256 const& _difficulty);
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static h256 eval(h256 const& _root, u256 const& _nonce);
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static bool verify(h256 const& _root, u256 const& _nonce, u256 const& _difficulty);
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bool mine(u256& o_solution, h256 const& _root, u256 const& _difficulty, uint _msTimeout = 100, bool const& _continue = bool(true));
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private:
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static h256 node(h256 const& _root, h256 const& _xn, uint_fast32_t _L, uint_fast32_t _i);
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h256 m_root;
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u256 m_nonce;
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};
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#endif
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}
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