#48 - Show warning when using non-default fee

src/confirm.ui

@@ -146,6 +146,19 @@
      </property>
     </spacer>
    </item>
+   <item>
+    <widget class="QLabel" name="warningLabel">
+     <property name="styleSheet">
+      <string notr="true">color: red;</string>
+     </property>
+     <property name="text">
+      <string>You are using a custom fee. Since fees are publically visible, you are giving up some privacy. Please use this only if you know what you are doing!</string>
+     </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
    <item>
     <widget class="Line" name="line">
      <property name="orientation">

src/sendtab.cpp

@@ -490,6 +490,13 @@ bool MainWindow::confirmTx(Tx tx) {
         minerFeeUSD->setAlignment(Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter);
         confirm.gridLayout->addWidget(minerFeeUSD, i, 2, 1, 1);
         minerFeeUSD->setText(Settings::getUSDFormat(tx.fee));
+
+        if (tx.fee == Settings::getMinerFee()) {
+            // Default fee
+            confirm.warningLabel->setVisible(false);
+        } else {
+            confirm.warningLabel->setVisible(true);
+        }
     }
 
     // And FromAddress in the confirm dialog