Function CheckTransaction

src/main.cpp:868–925

}

bool CheckTransaction(const CTransaction& tx, CValidationState& state)
{
    // Basic checks that don't depend on any context
    if (tx.vin.empty())
        return state.DoS(10, false, REJECT_INVALID, "bad-txns-vin-empty");

    if (tx.vout.empty())
        return state.DoS(10, false, REJECT_INVALID, "bad-txns-vout-empty");

    // Size limits (this doesn't take the witness into account, as that hasn't been checked for malleability)
    if (::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) > MAX_BLOCK_BASE_SIZE)
        return state.DoS(100, false, REJECT_INVALID, "bad-txns-oversize");

    // Check for negative or overflow output values
    CAmount nValueOut = 0;
    for (const auto& txout : tx.vout) {
        if (txout.nValue < 0)
            return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-negative");

        if (txout.nValue > MAX_MONEY)
            return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-toolarge");

        nValueOut += txout.nValue;
        if (!MoneyRange(nValueOut))
            return state.DoS(100, false, REJECT_INVALID, "bad-txns-txouttotal-toolarge");

        /////////////////////////////////////////////////////////// // lux
        if (txout.scriptPubKey.HasOpCall() || txout.scriptPubKey.HasOpCreate()) {
            std::vector<valtype> vSolutions;
            txnouttype whichType;
            if (!Solver(txout.scriptPubKey, whichType, vSolutions, true)) {
                return state.DoS(100, false, REJECT_INVALID, "bad-txns-contract-nonstandard");
            }
        }
        ///////////////////////////////////////////////////////////
    }


    // Check for duplicate inputs
    set<COutPoint> vInOutPoints;
    for (const CTxIn& txin : tx.vin) {
        if (vInOutPoints.count(txin.prevout))
            return state.DoS(100, error("CheckTransaction() : duplicate inputs"),
                REJECT_INVALID, "bad-txns-inputs-duplicate");
        vInOutPoints.insert(txin.prevout);
    }

    if (tx.IsCoinBase()) {
        if (/*tx.vin[0].scriptSig.size() < 2 || */ tx.vin[0].scriptSig.size() > 150)
            return state.DoS(100, false, REJECT_INVALID, "bad-cb-length");
    } else {
        for (const CTxIn& txin : tx.vin)
            if (txin.prevout.IsNull())
                return state.DoS(10, false, REJECT_INVALID, "bad-txns-prevout-null");
    }

    return true;
}