Qt: remove the 'local watchtower' option from GUI.

It is not realistic to expect Electrum to be used as a watchtower
in GUI mode, and possibly counter-productive (may set wrong
expectations).

A proper watchtower should be configured as a daemon. The
documentation will be updated to reflect this change.

electrum/gui/qt/__init__.py

@@ -370,8 +370,6 @@ class ElectrumGui(Logger):
             with self._num_wizards_lock:
                 if self._num_wizards_in_progress > 0 or len(self.windows) > 0:
                     return
-                if self.config.get('persist_daemon'):
-                    return
             self.app.quit()
         self.app.setQuitOnLastWindowClosed(False)  # so _we_ can decide whether to quit
         self.app.lastWindowClosed.connect(quit_after_last_window)

electrum/gui/qt/main_window.py

@@ -746,7 +746,8 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
             tools_menu.addAction(_("Electrum preferences"), self.settings_dialog)
 
         tools_menu.addAction(_("&Network"), self.gui_object.show_network_dialog).setEnabled(bool(self.network))
-        tools_menu.addAction(_("Local &Watchtower"), self.gui_object.show_watchtower_dialog).setEnabled(bool(self.network and self.network.local_watchtower))
+        if self.network and self.network.local_watchtower:
+            tools_menu.addAction(_("Local &Watchtower"), self.gui_object.show_watchtower_dialog)
         tools_menu.addAction(_("&Plugins"), self.plugins_dialog)
         tools_menu.addSeparator()
         tools_menu.addAction(_("&Sign/verify message"), self.sign_verify_message)

electrum/gui/qt/settings_dialog.py

@@ -161,31 +161,13 @@ channels graph and compute payment path locally, instead of using trampoline pay
         gossip_cb.stateChanged.connect(on_gossip_checked)
         lightning_widgets.append((gossip_cb, None))
 
-        help_local_wt = _("""If this option is checked, Electrum will
-run a local watchtower and protect your channels even if your wallet is not
-open. For this to work, your computer needs to be online regularly.""")
-        local_wt_cb = QCheckBox(_("Run a local watchtower"))
-        local_wt_cb.setToolTip(help_local_wt)
-        local_wt_cb.setChecked(bool(self.config.get('run_local_watchtower', False)))
-        def on_local_wt_checked(x):
-            self.config.set_key('run_local_watchtower', bool(x))
-        local_wt_cb.stateChanged.connect(on_local_wt_checked)
-        lightning_widgets.append((local_wt_cb, None))
-
-        help_persist = _("""If this option is checked, Electrum will persist after
-you close all your wallet windows, and the Electrum icon will be visible in the taskbar.
-Use this if you want your local watchtower to keep running after you close your wallet.""")
-        persist_cb = QCheckBox(_("Persist after all windows are closed"))
-        persist_cb.setToolTip(help_persist)
-        persist_cb.setChecked(bool(self.config.get('persist_daemon', False)))
-        def on_persist_checked(x):
-            self.config.set_key('persist_daemon', bool(x))
-        persist_cb.stateChanged.connect(on_persist_checked)
-        lightning_widgets.append((persist_cb, None))
-
-        help_remote_wt = _("""To use a remote watchtower, enter the corresponding URL here""")
+        help_remote_wt = ' '.join([
+            _("A watchtower is a daemon that watches your channels and prevents the other party from stealing funds by broadcasting an old state."),
+            _("If you have private a watchtower, enter its URL here."),
+            _("Check our online documentation if you want to configure Electrum as a watchtower."),
+        ])
         remote_wt_cb = QCheckBox(_("Use a remote watchtower"))
-        remote_wt_cb.setToolTip(help_remote_wt)
+        remote_wt_cb.setToolTip('<p>'+help_remote_wt+'</p>')
         remote_wt_cb.setChecked(bool(self.config.get('use_watchtower', False)))
         def on_remote_wt_checked(x):
             self.config.set_key('use_watchtower', bool(x))

electrum/network.py

@@ -351,7 +351,7 @@ class Network(Logger, NetworkRetryManager[ServerAddr]):
 
         # lightning network
         self.channel_blacklist = ChannelBlackList()
-        if self.config.get('run_local_watchtower', False):
+        if self.config.get('run_watchtower', False):
             from . import lnwatcher
             self.local_watchtower = lnwatcher.WatchTower(self)
             self.local_watchtower.start_network(self)

electrum/tests/regtest/regtest.sh

@@ -316,7 +316,7 @@ fi
 
 if [[ $1 == "configure_test_watchtower" ]]; then
     # carol is the watchtower of bob
-    $carol setconfig -o run_local_watchtower true
+    $carol setconfig -o run_watchtower true
     $carol setconfig -o watchtower_user wtuser
     $carol setconfig -o watchtower_password wtpassword
     $carol setconfig -o watchtower_address 127.0.0.1:12345