37 lines
1.5 KiB
C++
37 lines
1.5 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2015 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_POW_H
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#define BITCOIN_POW_H
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#include "consensus/params.h"
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#include <stdint.h>
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class CBlockHeader;
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class CBlockIndex;
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class uint256;
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class arith_uint256;
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// Define difficulty retarget algorithms
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enum DiffMode {
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DIFF_DEFAULT = 0, // Default to invalid 0
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DIFF_BTC = 1, // Retarget every x blocks (Bitcoin style)
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DIFF_KGW = 2, // Retarget using Kimoto Gravity Well
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DIFF_DGW = 3, // Retarget using Dark Gravity Wave v3
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};
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unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params&);
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unsigned int CalculateNextWorkRequired(const CBlockIndex* pindexLast, int64_t nFirstBlockTime, const Consensus::Params&);
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/** Check whether a block hash satisfies the proof-of-work requirement specified by nBits */
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bool CheckProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params&);
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arith_uint256 GetBlockProof(const CBlockIndex& block);
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/** Return the time it would take to redo the work difference between from and to, assuming the current hashrate corresponds to the difficulty at tip, in seconds. */
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int64_t GetBlockProofEquivalentTime(const CBlockIndex& to, const CBlockIndex& from, const CBlockIndex& tip, const Consensus::Params&);
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#endif // BITCOIN_POW_H
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