Inside Bitcoin

751    fFeeMinimized = fMinimize;
752}
753
754void SendCoinsDialog::on_buttonChooseFee_clicked()
755{
756    minimizeFeeSection(false);
757}
758
759void SendCoinsDialog::on_buttonMinimizeFee_clicked()
760{
761    updateFeeMinimizedLabel();
762    minimizeFeeSection(true);
763}
764
765void SendCoinsDialog::useAvailableBalance(SendCoinsEntry* entry)
766{
767    // Same behavior as send: if we have selected coins, only obtain their available balance.
768    // Copy to avoid modifying the member's data.
769    CCoinControl coin_control = *m_coin_control;
770    coin_control.m_allow_other_inputs = !coin_control.HasSelected();
771
772    // Calculate available amount to send.
773    CAmount amount = model->getAvailableBalance(&coin_control);
774    for (int i = 0; i < ui->entries->count(); ++i) {
775        SendCoinsEntry* e = qobject_cast<SendCoinsEntry*>(ui->entries->itemAt(i)->widget());
776        if (e && !e->isHidden() && e != entry) {
777            amount -= e->getValue().amount;
778        }
779    }
780
781    if (amount > 0) {
782      entry->checkSubtractFeeFromAmount();
783      entry->setAmount(amount);
784    } else {
785      entry->setAmount(0);
786    }
787}
788
789void SendCoinsDialog::updateFeeSectionControls()
790{
791    ui->confTargetSelector      ->setEnabled(ui->radioSmartFee->isChecked());
792    ui->labelSmartFee           ->setEnabled(ui->radioSmartFee->isChecked());
793    ui->labelSmartFee2          ->setEnabled(ui->radioSmartFee->isChecked());
794    ui->labelSmartFee3          ->setEnabled(ui->radioSmartFee->isChecked());
795    ui->labelFeeEstimation      ->setEnabled(ui->radioSmartFee->isChecked());
796    ui->labelCustomFeeWarning   ->setEnabled(ui->radioCustomFee->isChecked());
797    ui->labelCustomPerKilobyte  ->setEnabled(ui->radioCustomFee->isChecked());
798    ui->customFee               ->setEnabled(ui->radioCustomFee->isChecked());
799}
800
801void SendCoinsDialog::updateFeeMinimizedLabel()
802{
803    if(!model || !model->getOptionsModel())
804        return;
805
806    if (ui->radioSmartFee->isChecked())
807        ui->labelFeeMinimized->setText(ui->labelSmartFee->text());
808    else {
809        ui->labelFeeMinimized->setText(tr("%1/kvB").arg(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), ui->customFee->value())));
810    }
811}
812
813void SendCoinsDialog::updateCoinControlState()
814{
815    if (ui->radioCustomFee->isChecked()) {
816        m_coin_control->m_feerate = CFeeRate(ui->customFee->value());
817    } else {
818        m_coin_control->m_feerate.reset();
819    }
820    // Avoid using global defaults when sending money from the GUI
821    // Either custom fee will be used or if not selected, the confirmation target from dropdown box
822    m_coin_control->m_confirm_target = getConfTargetForIndex(ui->confTargetSelector->currentIndex());
823}
824
825void SendCoinsDialog::updateNumberOfBlocks(int count, const QDateTime& blockDate, double nVerificationProgress, SyncType synctype, SynchronizationState sync_state) {
826    // During shutdown, clientModel will be nullptr. Attempting to update views at this point may cause a crash
827    // due to accessing backend models that might no longer exist.
828    if (!clientModel) return;
829    // Process event
830    if (sync_state == SynchronizationState::POST_INIT) {
831        updateSmartFeeLabel();
832    }
833}
834
835void SendCoinsDialog::updateSmartFeeLabel()
836{
837    if(!model || !model->getOptionsModel())
838        return;
839    updateCoinControlState();
840    m_coin_control->m_feerate.reset(); // Explicitly use only fee estimation rate for smart fee labels
841    std::optional<int> returned_target;
842    FeeReason reason;
843    CFeeRate feeRate = CFeeRate(model->wallet().getMinimumFee(1000, *m_coin_control, &returned_target, &reason));
844
845    ui->labelSmartFee->setText(tr("%1/kvB").arg(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), feeRate.GetFeePerK())));
846
847    if (reason == FeeReason::FALLBACK) {
848        ui->labelSmartFee2->show(); // (Smart fee not initialized yet. This usually takes a few blocks...)
849        ui->labelFeeEstimation->setText("");
850        ui->fallbackFeeWarningLabel->setVisible(true);
851        int lightness = ui->fallbackFeeWarningLabel->palette().color(QPalette::WindowText).lightness();
852        QColor warning_colour(255 - (lightness / 5), 176 - (lightness / 3), 48 - (lightness / 14));
853        ui->fallbackFeeWarningLabel->setStyleSheet("QLabel { color: " + warning_colour.name() + "; }");
854        ui->fallbackFeeWarningLabel->setIndent(GUIUtil::TextWidth(QFontMetrics(ui->fallbackFeeWarningLabel->font()), "x"));
855    }
856    else
857    {
858        ui->labelSmartFee2->hide();
859        ui->labelFeeEstimation->setText("");
860        if (returned_target) {
861            ui->labelFeeEstimation->setText(tr("Estimated to begin confirmation within %n block(s).", "", *returned_target));
862        }
863        ui->fallbackFeeWarningLabel->setVisible(false);
864    }
865
866    updateFeeMinimizedLabel();
867}
868
869// Coin Control: copy label "Quantity" to clipboard
870void SendCoinsDialog::coinControlClipboardQuantity()
871{
872    GUIUtil::setClipboard(ui->labelCoinControlQuantity->text());
873}
874
875// Coin Control: copy label "Amount" to clipboard
876void SendCoinsDialog::coinControlClipboardAmount()
877{
878    GUIUtil::setClipboard(ui->labelCoinControlAmount->text().left(ui->labelCoinControlAmount->text().indexOf(" ")));
879}
880
881// Coin Control: copy label "Fee" to clipboard
882void SendCoinsDialog::coinControlClipboardFee()
883{
884    GUIUtil::setClipboard(ui->labelCoinControlFee->text().left(ui->labelCoinControlFee->text().indexOf(" ")).replace(ASYMP_UTF8, ""));
885}
886
887// Coin Control: copy label "After fee" to clipboard
888void SendCoinsDialog::coinControlClipboardAfterFee()
889{
890    GUIUtil::setClipboard(ui->labelCoinControlAfterFee->text().left(ui->labelCoinControlAfterFee->text().indexOf(" ")).replace(ASYMP_UTF8, ""));
891}
892
893// Coin Control: copy label "Bytes" to clipboard
894void SendCoinsDialog::coinControlClipboardBytes()
895{
896    GUIUtil::setClipboard(ui->labelCoinControlBytes->text().replace(ASYMP_UTF8, ""));
897}
898
899// Coin Control: copy label "Change" to clipboard
900void SendCoinsDialog::coinControlClipboardChange()
901{
902    GUIUtil::setClipboard(ui->labelCoinControlChange->text().left(ui->labelCoinControlChange->text().indexOf(" ")).replace(ASYMP_UTF8, ""));
903}
904
905// Coin Control: settings menu - coin control enabled/disabled by user
906void SendCoinsDialog::coinControlFeatureChanged(bool checked)
907{
908    ui->frameCoinControl->setVisible(checked);
909
910    if (!checked && model) { // coin control features disabled
911        m_coin_control = std::make_unique<CCoinControl>();
912    }
913
914    coinControlUpdateLabels();
915}
916
917// Coin Control: button inputs -> show actual coin control dialog
918void SendCoinsDialog::coinControlButtonClicked()
919{
920    auto dlg = new CoinControlDialog(*m_coin_control, model, platformStyle);
921    connect(dlg, &QDialog::finished, this, &SendCoinsDialog::coinControlUpdateLabels);
922    GUIUtil::ShowModalDialogAsynchronously(dlg);
923}
924
925// Coin Control: checkbox custom change address
926#if (QT_VERSION >= QT_VERSION_CHECK(6, 7, 0))
927void SendCoinsDialog::coinControlChangeChecked(Qt::CheckState state)
928#else
929void SendCoinsDialog::coinControlChangeChecked(int state)
930#endif
931{
932    if (state == Qt::Unchecked)
933    {
934        m_coin_control->destChange = CNoDestination();
935        ui->labelCoinControlChangeLabel->clear();
936    }
937    else
938        // use this to re-validate an already entered address
939        coinControlChangeEdited(ui->lineEditCoinControlChange->text());
940
941    ui->lineEditCoinControlChange->setEnabled((state == Qt::Checked));
942}
943
944// Coin Control: custom change address changed
945void SendCoinsDialog::coinControlChangeEdited(const QString& text)
946{
947    if (model && model->getAddressTableModel())
948    {
949        // Default to no change address until verified
950        m_coin_control->destChange = CNoDestination();
951        ui->labelCoinControlChangeLabel->setStyleSheet("QLabel{color:red;}");
952
953        const CTxDestination dest = DecodeDestination(text.toStdString());
954
955        if (text.isEmpty()) // Nothing entered
956        {
957            ui->labelCoinControlChangeLabel->setText("");
958        }
959        else if (!IsValidDestination(dest)) // Invalid address
960        {
961            ui->labelCoinControlChangeLabel->setText(tr("Warning: Invalid Bitcoin address"));
962        }
963        else // Valid address
964        {
965            if (!model->wallet().isSpendable(dest)) {
966                ui->labelCoinControlChangeLabel->setText(tr("Warning: Unknown change address"));
967
968                // confirmation dialog
969                QMessageBox::StandardButton btnRetVal = QMessageBox::question(this, tr("Confirm custom change address"), tr("The address you selected for change is not part of this wallet. Any or all funds in your wallet may be sent to this address. Are you sure?"),
970                    QMessageBox::Yes | QMessageBox::Cancel, QMessageBox::Cancel);
971
972                if(btnRetVal == QMessageBox::Yes)
973                    m_coin_control->destChange = dest;
974                else
975                {
976                    ui->lineEditCoinControlChange->setText("");
977                    ui->labelCoinControlChangeLabel->setStyleSheet("QLabel{color:black;}");
978                    ui->labelCoinControlChangeLabel->setText("");
979                }
980            }
981            else // Known change address
982            {
983                ui->labelCoinControlChangeLabel->setStyleSheet("QLabel{color:black;}");
984
985                // Query label
986                QString associatedLabel = model->getAddressTableModel()->labelForAddress(text);
987                if (!associatedLabel.isEmpty())
988                    ui->labelCoinControlChangeLabel->setText(associatedLabel);
989                else
990                    ui->labelCoinControlChangeLabel->setText(tr("(no label)"));
991
992                m_coin_control->destChange = dest;
993            }
994        }
995    }
996}
997
998// Coin Control: update labels
999void SendCoinsDialog::coinControlUpdateLabels()
1000{