Function GetNextWorkRequired

src/pow.cpp:22–59

#include <iostream>

unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock,
                                 const Consensus::Params& params)
{
    assert(pindexLast != nullptr);
    int nHeight = pindexLast->nHeight + 1;
    bool postfork = nHeight >= params.BTGHeight;

    if (postfork == false) {
        // Original Bitcoin PoW.
        return BitcoinGetNextWorkRequired(pindexLast, pblock, params);
    }
    else if (nHeight < params.BTGHeight + params.BTGPremineWindow) {
        // PoW limit for premine period.
        unsigned int nProofOfWorkLimit = UintToArith256(params.PowLimit(true)).GetCompact();
        return nProofOfWorkLimit;
    }
    else if (nHeight < params.BTGHeight + params.BTGPremineWindow + params.nDigishieldAveragingWindow) {
        // Pow limit start for warm-up period.
        return UintToArith256(params.powLimitStart).GetCompact();
    }
    else if (nHeight < params.BTGZawyLWMAHeight) {
        // Regular Digishield v3.
        return DigishieldGetNextWorkRequired(pindexLast, pblock, params);
    } else if (nHeight < params.BTGEquihashForkHeight) {
        // Zawy's LWMA (testnet launch).
        return LwmaGetNextWorkRequired(pindexLast, pblock, params);
    } else if (nHeight < params.BTGEquihashForkHeight + params.nZawyLwmaAveragingWindow) {
        // Reduce the difficulty of the first forked block by 100x and keep it for N blocks.
        if (nHeight == params.BTGEquihashForkHeight) {
            return ReduceDifficultyBy(pindexLast, 100, params);
        } else {
            return pindexLast->nBits;
        }
    } else {
        // Zawy's LWMA.
        return LwmaGetNextWorkRequired(pindexLast, pblock, params);
    }
}

unsigned int LwmaGetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params)
{