src/pow.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2014 The Bitcoin Core developers
   3 // Distributed under the MIT software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #ifndef BITCOIN_POW_H
   7 #define BITCOIN_POW_H
   8
   9 #include "consensus/params.h"
  10
  11 #include <stdint.h>
  12
  13 class CBlockHeader;
  14 class CBlockIndex;
  15 class uint256;
  16 class arith_uint256;
  17
  18 unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params&);
  19 unsigned int CalculateNextWorkRequired(const CBlockIndex* pindexLast, int64_t nFirstBlockTime, const Consensus::Params&);
  20
  21 /** Check whether a block hash satisfies the proof-of-work requirement specified by nBits */
  22 bool CheckProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params&);
  23 arith_uint256 GetBlockProof(const CBlockIndex& block);
  24
  25 /** 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. */
  26 int64_t GetBlockProofEquivalentTime(const CBlockIndex& to, const CBlockIndex& from, const CBlockIndex& tip, const Consensus::Params&);
  27
  28 #endif // BITCOIN_POW_H