比特币源码研读（20）-交易（6）交易流程分析

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处理待交易币的状态

       //处理待交易的币状态，并提示给客户

    // process prepareStatus and on errorgenerate message shown to user

    processSendCoinsReturn(prepareStatus,

       BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(),currentTransaction.getTransactionFee()));

从注释，可以看出，该函数的任务是处理待交易币的状态信息，并且如果有错误，提示给用户

函数原型如下;

voidSendCoinsDialog::processSendCoinsReturn(const WalletModel::SendCoinsReturn&sendCoinsReturn, const QString &msgArg)

{

    QPair msgParams;

    // Default to a warning message, overrideif error message is needed

    msgParams.second = CClientUIInterface::MSG_WARNING;

    // This comment is specific toSendCoinsDialog usage of WalletModel::SendCoinsReturn.

    // WalletModel::TransactionCommitFailed isused only in WalletModel::sendCoins()

    // all others are used only inWalletModel::prepareTransaction()

    switch(sendCoinsReturn.status)

    {

    case WalletModel::InvalidAddress:   //地址无效，则给出接收地址无效提示

        msgParams.first = tr("Therecipient address is not valid. Please recheck.");

        break;

    case WalletModel::InvalidAmount:  //金额无效，则给给金额必须大于0的提示

        msgParams.first = tr("The amountto pay must be larger than 0.");

        break;

    case WalletModel::AmountExceedsBalance: //金额超过了你的余额，则给出提示

        msgParams.first = tr("The amountexceeds your balance.");

        break;

    caseWalletModel::AmountWithFeeExceedsBalance: //当交易金额+交易费超过余额时，给出提示

        msgParams.first = tr("The totalexceeds your balance when the %1 transaction fee isincluded.").arg(msgArg);

        break;

    caseWalletModel::DuplicateAddress:  //每个utxo只能使用一次，因此只有一个地址，如果有重复地址，则给出提示

        msgParams.first = tr("Duplicateaddress found: addresses should only be used once each.");

        break;

    caseWalletModel::TransactionCreationFailed: //交易创建失败给出提示

        msgParams.first = tr("Transactioncreation failed!");

        msgParams.second =CClientUIInterface::MSG_ERROR;

        break;

    case WalletModel::TransactionCommitFailed: //交易错误，给出交易错误的原因

        msgParams.first = tr("Thetransaction was rejected with the following reason:%1").arg(sendCoinsReturn.reasonCommitFailed);

        msgParams.second =CClientUIInterface::MSG_ERROR;

        break;

    case WalletModel::AbsurdFee:    //交易费用太高，给出提示

        msgParams.first = tr("A fee higherthan %1 is considered an absurdly highfee.").arg(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(),maxTxFee));

        break;

    case WalletModel::PaymentRequestExpired:  交易请求过期，给出提示

        msgParams.first = tr("Paymentrequest expired.");

        msgParams.second =CClientUIInterface::MSG_ERROR;

        break;

    // included to prevent a compiler warning.

    case WalletModel::OK:

    default:

        return;

    }

今天先写这么多吧！

区块链研习社比特币源码研读班  electroman

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