pow.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-present The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_POW_H
#define BITCOIN_POW_H
 
#include <consensus/params.h>
 
#include <cstdint>
 
class CBlockHeader;
class CBlockIndex;
class uint256;
class arith_uint256;

std::optional<arith_uint256> DeriveTarget(unsigned int nBits, uint256 pow_limit);
 
unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params&);
unsigned int CalculateNextWorkRequired(const CBlockIndex* pindexLast, int64_t nFirstBlockTime, const Consensus::Params&);

bool CheckProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params&);
bool CheckProofOfWorkImpl(uint256 hash, unsigned int nBits, const Consensus::Params&);

bool PermittedDifficultyTransition(const Consensus::Params& params, int64_t height, uint32_t old_nbits, uint32_t new_nbits);
 
#endif // BITCOIN_POW_H