kivy: toggle lightning dialog

electrum/gui/kivy/main_window.py

@@ -42,6 +42,7 @@ from .uix.dialogs.installwizard import InstallWizard
 from .uix.dialogs import InfoBubble, crash_reporter
 from .uix.dialogs import OutputList, OutputItem
 from .uix.dialogs import TopLabel, RefLabel
+from .uix.dialogs.question import Question
 
 #from kivy.core.window import Window
 #Window.softinput_mode = 'below_target'
@@ -613,7 +614,6 @@ class ElectrumWindow(App):
             if not ask_if_wizard:
                 launch_wizard()
             else:
-                from .uix.dialogs.question import Question
                 def handle_answer(b: bool):
                     if b:
                         launch_wizard()
@@ -676,6 +676,9 @@ class ElectrumWindow(App):
         d.open()
 
     def lightning_channels_dialog(self):
+        if not self.wallet.has_lightning():
+            self.show_error('Lightning not enabled on this wallet')
+            return
         if self._channels_dialog is None:
             self._channels_dialog = LightningChannelsDialog(self)
         self._channels_dialog.open()
@@ -1073,8 +1076,39 @@ class ElectrumWindow(App):
         else:
             f(*(args + (None,)))
 
+    def toggle_lightning(self):
+        if self.wallet.has_lightning():
+            if not bool(self.wallet.lnworker.channels):
+                warning = _('This will delete your lightning private keys')
+                d = Question(_('Disable Lightning?') + '\n\n' + warning, self._disable_lightning)
+                d.open()
+            else:
+                self.show_info('This wallet has channels')
+        else:
+            warning1 = _("Lightning support in Electrum is experimental. Do not put large amounts in lightning channels.")
+            warning2 = _("Funds stored in lightning channels are not recoverable from your seed. You must backup your wallet file everytime you crate a new channel.")
+            d = Question(_('Enable Lightning?') + '\n\n' + warning1 + '\n\n' + warning2, self._enable_lightning)
+            d.open()
+
+    def _enable_lightning(self, b):
+        if not b:
+            return
+        wallet_path = self.get_wallet_path()
+        self.wallet.init_lightning()
+        self.show_info(_('Lightning keys have been initialized.'))
+        self.stop_wallet()
+        self.load_wallet_by_name(wallet_path)
+
+    def _disable_lightning(self, b):
+        if not b:
+            return
+        wallet_path = self.get_wallet_path()
+        self.wallet.remove_lightning()
+        self.show_info(_('Lightning keys have been removed.'))
+        self.stop_wallet()
+        self.load_wallet_by_name(wallet_path)
+
     def delete_wallet(self):
-        from .uix.dialogs.question import Question
         basename = os.path.basename(self.wallet.storage.path)
         d = Question(_('Delete wallet?') + '\n' + basename, self._delete_wallet)
         d.open()

electrum/gui/kivy/uix/ui_screens/status.kv

@@ -29,6 +29,9 @@ Popup:
                     BoxLabel:
                         text: _("Wallet type:")
                         value: app.wallet.wallet_type
+                    BoxLabel:
+                        text: _("Lightning:")
+                        value: _('Enabled') if app.wallet.has_lightning() else _('Disabled')
                     BoxLabel:
                         text: _("Balance") + ':'
                         value: app.format_amount_and_units(root.confirmed + root.unconfirmed + root.unmatured)
@@ -77,6 +80,13 @@ Popup:
                 on_release:
                     root.dismiss()
                     app.delete_wallet()
+            Button:
+                size_hint: 0.5, None
+                height: '48dp'
+                text: _('Disable LN') if app.wallet.has_lightning() else _('Enable LN')
+                on_release:
+                    root.dismiss()
+                    app.toggle_lightning()
             Button:
                 size_hint: 0.5, None
                 height: '48dp'