/*
	This file is part of cpp-ethereum.

	cpp-ethereum is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	cpp-ethereum is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/** @file Ethash.h
 * @author Gav Wood <i@gavwood.com>
 * @date 2014
 *
 * A proof of work algorithm.
 */

#pragma once

#include <chrono>
#include <thread>
#include <cstdint>
#include "Common.h"
#include "Miner.h"
#include "Farm.h"

class ethash_cl_miner;
class ethash_cuda_miner;

namespace dev
{

class RLP;
class RLPStream;

namespace eth
{

class BlockInfo;
class EthashCLHook;
class EthashCUDAHook;

class Ethash
{
public:
	using Nonce = h64;

	class BlockHeaderRaw: public BlockInfo
	{
		friend class EthashSealEngine;

	public:
		h256 const& seedHash() const;
		Nonce const& nonce() const { return m_nonce; }
		h256 const& mixHash() const { return m_mixHash; }

	protected:
		BlockHeaderRaw() = default;
		BlockHeaderRaw(BlockInfo const& _bi): BlockInfo(_bi) {}

		void clear() { m_mixHash = h256(); m_nonce = Nonce(); }

	private:
		Nonce m_nonce;
		h256 m_mixHash;

		mutable h256 m_seedHash;
	};
	using BlockHeader = BlockHeaderPolished<BlockHeaderRaw>;
};

}
}