Topic: [ANN][YAC] YACoin ongoing development - page 134. (Read 379983 times)

    BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
    {
        // Attempt to add more inputs
        // Only add coins of the same key/address as kernel
        if (txNew.vout.size() == 2 && ((pcoin.first->vout[pcoin.second].scriptPubKey == scriptPubKeyKernel || pcoin.first->vout[pcoin.second].scriptPubKey == txNew.vout[1].scriptPubKey))
            && pcoin.first->GetHash() != txNew.vin[0].prevout.hash)
        {
            // Stop adding more inputs if already too many inputs
            if (txNew.vin.size() >= 100)
                break;
            // Stop adding more inputs if value is already pretty significant
            if (nCredit > nCombineThreshold)
                break;
            // Stop adding inputs if reached reserve limit
            if (nCredit + pcoin.first->vout[pcoin.second].nValue > nBalance - nReserveBalance)
                break;
            // Do not add additional significant input
            if (pcoin.first->vout[pcoin.second].nValue > nCombineThreshold)
                continue;
            // Do not add input that is still too young
            if (pcoin.first->nTime + nStakeMaxAge > txNew.nTime)
                continue;
            txNew.vin.push_back(CTxIn(pcoin.first->GetHash(), pcoin.second));
            nCredit += pcoin.first->vout[pcoin.second].nValue;
            vwtxPrev.push_back(pcoin.first);
        }
    }

    // ppcoin: only the second transaction can be the optional coinstake
    for (unsigned int i = 2; i < vtx.size(); i++)
        if (vtx[i].IsCoinStake())
            return DoS(100, error("CheckBlock() : coinstake in wrong position"));

    // ppcoin: coinbase output should be empty if proof-of-stake block
    if (IsProofOfStake() && (vtx[0].vout.size() != 1 || !vtx[0].vout[0].IsEmpty()))
        return error("CheckBlock() : coinbase output not empty for proof-of-stake block");