Function GetKernelStakeModifier

src/stake.cpp:340–370

The stake modifier used to hash for a stake kernel is chosen as the stake modifier about a selection interval later than the coin generating the kernel

// The stake modifier used to hash for a stake kernel is chosen as the stake
// modifier about a selection interval later than the coin generating the kernel
bool GetKernelStakeModifier(uint256 hashBlockFrom, uint64_t& nStakeModifier, int& nStakeModifierHeight, int64_t& nStakeModifierTime, bool fPrintProofOfStake)
{
    nStakeModifier = 0;
    if (!mapBlockIndex.count(hashBlockFrom))
        return error("GetKernelStakeModifier() : block not indexed");

    const CBlockIndex* pindexFrom = mapBlockIndex[hashBlockFrom];
    nStakeModifierHeight = pindexFrom->nHeight;
    nStakeModifierTime = pindexFrom->GetBlockTime();

    const int64_t nSelectionTime = GetSelectionTime();
    const CBlockIndex* pindex = pindexFrom;
    CBlockIndex* pindexNext = chainActive[pindexFrom->nHeight + 1];

    // loop to find the stake modifier later by a selection time
    while (nStakeModifierTime < pindexFrom->GetBlockTime() + nSelectionTime) {
        if (!pindexNext) {
            // Should never happen
            return error("Null pindexNext\n");
        }

        pindex = pindexNext;
        pindexNext = chainActive[pindexNext->nHeight + 1];
        if (pindex->GeneratedStakeModifier()) {
            nStakeModifierHeight = pindex->nHeight;
            nStakeModifierTime = pindex->GetBlockTime();
        }
    }
    nStakeModifier = pindex->nStakeModifier;
    return true;
}
#endif

bool MultiplyStakeTarget(uint256& bnTarget, int nModifierHeight, int64_t nModifierTime, int64_t nWeight) {