Function CheckForMasternodePayment

src/main.cpp:4306–4442

}

bool CheckForMasternodePayment(const CTransaction& tx, const CBlockHeader& header) {
    // Regular transactions don't have to share anything with masternodes
    if (!tx.IsCoinGenerated())
        return true;

    const CChainParams& chainParams = Params();

    // Special check for genesis block, which is guaranteed to not have a masternode payment
    if (header.GetHash() == chainParams.HashGenesisBlock())
        return true;

    // Not required for testnet - only optional
    if (chainParams.NetworkID() == CBaseChainParams::TESTNET)
        return true;

    const CBlockIndex* pindexPrev = LookupBlockIndex(header.hashPrevBlock);
    const int nHeight = pindexPrev ? pindexPrev->nHeight + 1 : 0;
    
    //Skip for mint

    if (nHeight == chainParams.PreminePayment()) {
        return true;
    }

    // Check if a block is already accepted. These blocks cannot be checked for masternode payments,
    // because we don't know, which masternodes is active at that moment of accepting this block,
    // so that why we can't verify if tx from this block was actually rewards the masternode and doesn't
    // simply split the block subsidy which AFAIK and some pools do.
    // So, if we found a block in the block index, then return true as if this tx has a valid masternode payment.
    const CBlockIndex* pindex = LookupBlockIndex(header.GetHash(nHeight));
    if (pindex)
        return true;

    uint32_t mnPaymentsStartDate = 0;

    // Give us 8k blocks to start a MN
    if (Params().NetworkID() == CBaseChainParams::REGTEST) {
        if (nHeight <= 8000) return true;
    }


    if (chainParams.NetworkID() == CBaseChainParams::TESTNET/*|| chainParams.NetworkID() == CBaseChainParams::REGTEST*/) {
        mnPaymentsStartDate = START_MASTERNODE_PAYMENTS_TESTNET;
        // avoid the few testnet blocks without reward due to temporary lack of online MN
        if (nHeight == 3241 || nHeight == 3777 || nHeight == 5072) return true;
        if (nHeight >= 7494 && nHeight <= 7660) return true;
    } else {
        mnPaymentsStartDate = START_MASTERNODE_PAYMENTS;
    }
    // If masternode payments haven't started yet, then everything is OK
    if (header.nTime < mnPaymentsStartDate)
        return true;

    // Calculate total reward and find masternode payment txout
    CAmount totalReward = 0, masternodePayment = 0;
    if (tx.IsCoinStake()) {
        totalReward = GetProofOfStakeReward(0, nHeight);
    } else {