Added base unit 'bits'.

gui/qt/amountedit.py

@@ -63,8 +63,14 @@ class BTCAmountEdit(AmountEdit):
 
     def _base_unit(self):
         p = self.decimal_point()
-        assert p in [5,8]
-        return "BTC" if p == 8 else "mBTC"
+        assert p in [2, 5, 8]
+        if p == 8:
+            return 'BTC'
+        if p == 5:
+            return 'mBTC'
+        if p == 2:
+            return 'bits'
+        raise Exception('Unknown base unit')
 
     def get_amount(self):
         try:

gui/qt/main_window.py

@@ -444,9 +444,14 @@ class ElectrumWindow(QMainWindow):
 
 
     def base_unit(self):
-        assert self.decimal_point in [5,8]
-        return "BTC" if self.decimal_point == 8 else "mBTC"
-
+        assert self.decimal_point in [2, 5, 8]
+        if self.decimal_point == 2:
+            return 'bits'
+        if self.decimal_point == 5:
+            return 'mBTC'
+        if self.decimal_point == 8:
+            return 'BTC'
+        raise Exception('Unknown base unit')
 
     def update_status(self):
         if self.network is None or not self.network.is_running():
@@ -2486,7 +2491,7 @@ class ElectrumWindow(QMainWindow):
         if not self.config.is_modifiable('fee_per_kb'):
             for w in [fee_e, fee_label]: w.setEnabled(False)
 
-        units = ['BTC', 'mBTC']
+        units = ['BTC', 'mBTC', 'bits']
         unit_label = QLabel(_('Base unit') + ':')
         grid.addWidget(unit_label, 3, 0)
         unit_combo = QComboBox()
@@ -2557,7 +2562,14 @@ class ElectrumWindow(QMainWindow):
 
         unit_result = units[unit_combo.currentIndex()]
         if self.base_unit() != unit_result:
-            self.decimal_point = 8 if unit_result == 'BTC' else 5
+            if unit_result == 'BTC':
+                self.decimal_point = 8
+            elif unit_result == 'mBTC':
+                self.decimal_point = 5
+            elif unit_result == 'bits':
+                self.decimal_point = 2
+            else:
+                raise Exception('Unknown base unit')
             self.config.set_key('decimal_point', self.decimal_point, True)
             self.update_history_tab()
             self.update_status()