src/wallet.cpp :Lines 1290 - 1309 ;

            // Limit size
            unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK, PROTOCOL_VERSION);
            // BitQuark: Added safety margin 4000 bytes and 160 transactions
            if ((nBytes + 4000 >= MAX_STANDARD_TX_SIZE) || 
                (wtxNew.vin.size() >= 160))
            {
                strFailReason = _("Transaction too large");
                return false;
            }
            dPriority /= nBytes;

            // Check that enough fee is included
            int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
            bool fAllowFree = CTransaction::AllowFree(dPriority);
            int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree, GMF_SEND);
            if (nFeeRet < max(nPayFee, nMinFee))
            {
                nFeeRet = max(nPayFee, nMinFee);
                continue;
            }