Send: don't lose precision

src/appcontext.cpp

@@ -206,10 +206,11 @@ void AppContext::onSweepOutput(const QString &keyImage, QString address, bool ch
 void AppContext::onCreateTransaction(XmrToOrder *order) {
     // tx creation via xmr.to
     const QString description = QString("XmrTo order %1").arg(order->uuid);
-    this->onCreateTransaction(order->receiving_subaddress, order->incoming_amount_total, description, false);
+    quint64 amount = WalletManager::amountFromDouble(order->incoming_amount_total);
+    this->onCreateTransaction(order->receiving_subaddress, amount, description, false);
 }
 
-void AppContext::onCreateTransaction(const QString &address, const double amount, const QString &description, bool all) {
+void AppContext::onCreateTransaction(const QString &address, quint64 amount, const QString &description, bool all) {
     // tx creation
     this->tmpTxDescription = description;
 
@@ -218,13 +219,13 @@ void AppContext::onCreateTransaction(const QString &address, const double amount
         return;
     }
 
-    if (!all && amount <= 0) {
+    if (!all && amount == 0) {
         emit createTransactionError("Cannot send nothing");
         return;
     }
 
-    auto balance = this->currentWallet->balance() / globals::cdiv;
-    auto unlocked_balance = this->currentWallet->unlockedBalance() / globals::cdiv;
+    auto balance = this->currentWallet->balance();
+    auto unlocked_balance = this->currentWallet->unlockedBalance();
     if(!all && amount > unlocked_balance) {
         emit createTransactionError("Not enough money to spend");
         return;
@@ -233,12 +234,11 @@ void AppContext::onCreateTransaction(const QString &address, const double amount
         return;
     }
 
-    auto amount_num = static_cast<quint64>(amount * globals::cdiv);
     qDebug() << "creating tx";
-    if(all || amount == balance)
+    if (all)
         this->currentWallet->createTransactionAllAsync(address, "", this->tx_mixin, this->tx_priority);
     else
-        this->currentWallet->createTransactionAsync(address, "", amount_num, this->tx_mixin, this->tx_priority);
+        this->currentWallet->createTransactionAsync(address, "", amount, this->tx_mixin, this->tx_priority);
 
     emit initiateTransaction();
 }

src/appcontext.h

@@ -109,7 +109,7 @@ public:
 
 public slots:
     void onOpenWallet(const QString& path, const QString &password);
-    void onCreateTransaction(const QString &address, double amount, const QString &description, bool all);
+    void onCreateTransaction(const QString &address, quint64 amount, const QString &description, bool all);
     void onCreateTransaction(XmrToOrder *order);
     void onCancelTransaction(PendingTransaction *tx, const QString &address);
     void onSweepOutput(const QString &keyImage, QString address, bool churn, int outputs) const;

src/libwalletqt/WalletManager.cpp

@@ -255,12 +255,12 @@ QString WalletManager::displayAmount(quint64 amount)
     return QString::fromStdString(Monero::Wallet::displayAmount(amount));
 }
 
-quint64 WalletManager::amountFromString(const QString &amount) const
+quint64 WalletManager::amountFromString(const QString &amount)
 {
     return Monero::Wallet::amountFromString(amount.toStdString());
 }
 
-quint64 WalletManager::amountFromDouble(double amount) const
+quint64 WalletManager::amountFromDouble(double amount)
 {
     return Monero::Wallet::amountFromDouble(amount);
 }

src/libwalletqt/WalletManager.h

@@ -113,8 +113,8 @@ public:
 
     //! since we can't call static method from QML, move it to this class
     Q_INVOKABLE static QString displayAmount(quint64 amount);
-    Q_INVOKABLE quint64 amountFromString(const QString &amount) const;
-    Q_INVOKABLE quint64 amountFromDouble(double amount) const;
+    Q_INVOKABLE static quint64 amountFromString(const QString &amount);
+    Q_INVOKABLE static quint64 amountFromDouble(double amount);
     Q_INVOKABLE quint64 maximumAllowedAmount() const;
 
     // QML JS engine doesn't support unsigned integers

src/mainwindow.cpp

@@ -149,7 +149,7 @@ MainWindow::MainWindow(AppContext *ctx, QWidget *parent) :
     ui->fiatTickerLayout->addWidget(m_balanceWidget);
 
     // Send widget
-    connect(ui->sendWidget, &SendWidget::createTransaction, m_ctx, QOverload<const QString &, const double, const QString &, bool>::of(&AppContext::onCreateTransaction));
+    connect(ui->sendWidget, &SendWidget::createTransaction, m_ctx, QOverload<const QString &, quint64, const QString &, bool>::of(&AppContext::onCreateTransaction));
 
     // Nodes
     connect(m_ctx->nodes, &Nodes::nodeExhausted, this, &MainWindow::showNodeExhaustedMessage);

src/sendwidget.cpp

@@ -5,6 +5,7 @@
 #include "sendwidget.h"
 #include "mainwindow.h"
 #include "ui_sendwidget.h"
+#include "globals.h"
 
 SendWidget::SendWidget(QWidget *parent) :
         QWidget(parent),
@@ -87,7 +88,6 @@ void SendWidget::sendClicked() {
         return;
     }
 
-    double amount;
     QString currency = ui->comboCurrencySelection->currentText();
     QString recipient = ui->lineAddress->text().simplified().remove(' ');
     QString description = ui->lineDescription->text();
@@ -96,24 +96,23 @@ void SendWidget::sendClicked() {
         return;
     }
 
-    if (currency != "XMR") {
-        amount = this->conversionAmount();
-        if(amount <= 0.0) {
+    quint64 amount;
+    if (currency == "XMR") {
+        amount = this->amount();
+        bool sendAll = (ui->lineAmount->text() == "all");
+        if (amount == 0 && !sendAll) {
+            QMessageBox::warning(this, "Amount error", "Invalid amount specified.");
+            return;
+        }
+        emit createTransaction(recipient, amount, description, sendAll);
+    } else {
+        amount = WalletManager::amountFromDouble(this->conversionAmount());
+        if (amount == 0) {
             QMessageBox::warning(this, "Fiat conversion error", "Could not create transaction.");
             return;
         }
         emit createTransaction(recipient, amount, description, false);
-        return;
     }
-
-    amount = this->amount();
-    bool sendAll = amount == -1.0;
-    if(amount == 0.0){
-        QMessageBox::warning(this, "Amount error", "Invalid amount specified.");
-        return;
-    }
-
-    emit createTransaction(recipient, amount, description, sendAll);
 }
 
 void SendWidget::aliasClicked() {
@@ -129,13 +128,14 @@ void SendWidget::clearClicked() {
 
 void SendWidget::btnMaxClicked() {
     ui->lineAmount->setText("all");
+    this->updateConversionLabel();
 }
 
 void SendWidget::updateConversionLabel() {
-    auto amount = this->amount();
-    if(amount == -1) return;
+    auto amount = this->amountDouble();
+
     ui->label_conversionAmount->setText("");
-    if(amount <= 0) {
+    if (amount <= 0) {
         ui->label_conversionAmount->hide();
         return;
     }
@@ -147,7 +147,7 @@ void SendWidget::updateConversionLabel() {
 
         } else {
             auto preferredFiatCurrency = config()->get(Config::preferredFiatCurrency).toString();
-            double conversionAmount = AppContext::prices->convert("XMR", preferredFiatCurrency, this->amount());
+            double conversionAmount = AppContext::prices->convert("XMR", preferredFiatCurrency, this->amountDouble());
             return QString("~%1 %2").arg(QString::number(conversionAmount, 'f', 2), preferredFiatCurrency);
         }
     }();
@@ -158,18 +158,23 @@ void SendWidget::updateConversionLabel() {
 
 double SendWidget::conversionAmount() {
     QString currency = ui->comboCurrencySelection->currentText();
-    return AppContext::prices->convert(currency, "XMR", this->amount());
+    return AppContext::prices->convert(currency, "XMR", this->amountDouble());
 }
 
-double SendWidget::amount() {
+quint64 SendWidget::amount() {
     // grab amount from "amount" text box
     QString amount = ui->lineAmount->text();
-    if(amount == "all") return -1.0;
+    if (amount == "all") return 0;
+
     amount.replace(',', '.');
-    if(amount.isEmpty()) return 0.0;
-    auto amount_num = amount.toDouble();
-    if(amount_num <= 0) return 0.0;
-    return amount_num;
+    if (amount.isEmpty()) return 0;
+
+    return WalletManager::amountFromString(amount);
+}
+
+double SendWidget::amountDouble() {
+    quint64 amount = this->amount();
+    return amount / globals::cdiv;
 }
 
 void SendWidget::onOpenAliasResolved(const QString &address, const QString &openAlias) {

src/sendwidget.h

@@ -44,14 +44,15 @@ public slots:
 
 signals:
     void resolveOpenAlias(const QString &address);
-    void createTransaction(const QString &address, double amount, const QString &description, bool all);
+    void createTransaction(const QString &address, quint64 amount, const QString &description, bool all);
 
 private:
     void setupComboBox();
+    double amountDouble();
 
     Ui::SendWidget *ui;
     AppContext *m_ctx;
-    double amount();
+    quint64 amount();
     double conversionAmount();
 };