Method prepareTransaction

src/qt/walletmodel.cpp:239–354

}

WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransaction& transaction, const CCoinControl* coinControl, bool sign)
{
    CAmount total = 0;
    bool fSubtractFeeFromAmount = false;
    QList<SendCoinsRecipient> recipients = transaction.getRecipients();
    std::vector<CRecipient> vecSend;

    if (recipients.empty()) {
        return OK;
    }

    if (isUnlockStakingOnly()) {
        return StakingOnlyUnlocked;
    }

    QSet<QString> setAddress; // Used to detect duplicates
    int nAddresses = 0;

    // Pre-check input data for validity
    Q_FOREACH (const SendCoinsRecipient& rcp, recipients) {
        if (rcp.fSubtractFeeFromAmount)
            fSubtractFeeFromAmount = true;
        if (rcp.paymentRequest.IsInitialized()) { // PaymentRequest...
            CAmount subtotal = 0;
            const payments::PaymentDetails& details = rcp.paymentRequest.getDetails();
            for (int i = 0; i < details.outputs_size(); i++) {
                const payments::Output& out = details.outputs(i);
                if (out.amount() <= 0) continue;
                subtotal += out.amount();
                const unsigned char* scriptStr = (const unsigned char*)out.script().data();
                CScript scriptPubKey(scriptStr, scriptStr + out.script().size());
                CAmount nAmount = out.amount();
                CRecipient recipient = {scriptPubKey, nAmount, rcp.fSubtractFeeFromAmount};
                vecSend.push_back(recipient);
            }
            if (subtotal <= 0) {
                return InvalidAmount;
            }
            total += subtotal;
        } else { // User-entered lux address / amount:
            if (!validateAddress(rcp.address)) {
                return InvalidAddress;
            }
            if (rcp.amount <= 0) {
                return InvalidAmount;
            }
            setAddress.insert(rcp.address);
            ++nAddresses;

            CScript scriptPubKey = GetScriptForDestination(DecodeDestination(rcp.address.toStdString()));
            CRecipient recipient = {scriptPubKey, rcp.amount, rcp.fSubtractFeeFromAmount};
            vecSend.push_back(recipient);

            total += rcp.amount;
        }
    }
    if (setAddress.size() != nAddresses) {
        return DuplicateAddress;