enable lightning through command line option

electrum/commands.py

@@ -1026,7 +1026,8 @@ def add_global_options(parser):
     group.add_argument("--testnet", action="store_true", dest="testnet", default=False, help="Use Testnet")
     group.add_argument("--regtest", action="store_true", dest="regtest", default=False, help="Use Regtest")
     group.add_argument("--simnet", action="store_true", dest="simnet", default=False, help="Use Simnet")
-    group.add_argument("--reckless", action="store_true", dest="reckless", default=False, help="Play with real money")
+    group.add_argument("--lightning", action="store_true", dest="lightning", default=False, help="Enable lightning")
+    group.add_argument("--reckless", action="store_true", dest="reckless", default=False, help="Allow to enable lightning on mainnet")
 
 def get_parser():
     # create main parser

electrum/daemon.py

@@ -166,11 +166,9 @@ class Daemon(DaemonThread):
             self.init_server(config, fd)
         # server-side watchtower
         self.watchtower = WatchTower(self.config, self.network.lnwatcher) if self.config.get('watchtower_host') else None
-        # client-side
         if self.network:
             self.network.start([
                 self.fx.run,
-                self.network.lnwatcher.watchtower_task,
             ])
         self.start()
 

electrum/gui/qt/channels_list.py

@@ -104,8 +104,11 @@ class ChannelsList(MyTreeView):
         return h
 
     def update_status(self):
+        network = self.parent.network
+        if network.lngossip is None:
+            return
         channel_db = self.parent.network.channel_db
-        num_peers = sum([p.initialized.is_set() for p in self.parent.wallet.lnworker.peers.values()])
+        num_peers = sum([p.initialized.is_set() for p in network.lngossip.peers.values()])
         msg = _('{} peers, {} nodes, {} channels.').format(num_peers, channel_db.num_nodes, channel_db.num_channels)
         self.status.setText(msg)
 

electrum/gui/qt/history_list.py

@@ -272,8 +272,9 @@ class HistoryModel(QAbstractItemModel, Logger):
             selected_row = selected.row()
         fx = self.parent.fx
         if fx: fx.history_used_spot = False
-        r = self.parent.wallet.get_full_history(domain=self.get_domain(), from_timestamp=None, to_timestamp=None, fx=fx)
-        lightning_history = self.parent.wallet.lnworker.get_history()
+        wallet = self.parent.wallet
+        r = wallet.get_full_history(domain=self.get_domain(), from_timestamp=None, to_timestamp=None, fx=fx)
+        lightning_history = wallet.lnworker.get_history() if wallet.lnworker else []
         self.set_visibility_of_columns()
         #if r['transactions'] == list(self.transactions.values()):
         #    return
@@ -433,12 +434,14 @@ class HistoryList(MyTreeView, AcceptFileDragDrop):
 
     def __init__(self, parent, model: HistoryModel):
         super().__init__(parent, self.create_menu, stretch_column=HistoryColumns.DESCRIPTION)
+        self.config = parent.config
         self.hm = model
         self.proxy = HistorySortModel(self)
         self.proxy.setSourceModel(model)
         self.setModel(self.proxy)
-
-        self.config = parent.config
+        if not self.config.get('lightning'):
+            self.setColumnHidden(HistoryColumns.LN_BALANCE, True)
+            self.setColumnHidden(HistoryColumns.LN_AMOUNT, True)
         AcceptFileDragDrop.__init__(self, ".txn")
         self.setSortingEnabled(True)
         self.start_timestamp = None

electrum/gui/qt/invoice_list.py

@@ -92,7 +92,8 @@ class InvoiceList(MyTreeView):
             self.model().insertRow(idx, items)
 
         lnworker = self.parent.wallet.lnworker
-        for key, (invoice, direction, is_paid) in lnworker.invoices.items():
+        items = lnworker.invoices.items() if lnworker else []
+        for key, (invoice, direction, is_paid) in items:
             if direction == RECEIVED:
                 continue
             status = lnworker.get_invoice_status(key)

electrum/gui/qt/main_window.py

@@ -431,7 +431,8 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
     def load_wallet(self, wallet):
         wallet.thread = TaskThread(self, self.on_error)
         self.update_recently_visited(wallet.storage.path)
-        wallet.lnworker.on_channels_updated()
+        if wallet.lnworker:
+            wallet.lnworker.on_channels_updated()
         self.need_update.set()
         # Once GUI has been initialized check if we want to announce something since the callback has been called before the GUI was initialized
         # update menus
@@ -626,7 +627,8 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         view_menu = menubar.addMenu(_("&View"))
         add_toggle_action(view_menu, self.addresses_tab)
         add_toggle_action(view_menu, self.utxo_tab)
-        add_toggle_action(view_menu, self.channels_tab)
+        if self.config.get('lightning'):
+            add_toggle_action(view_menu, self.channels_tab)
         add_toggle_action(view_menu, self.contacts_tab)
         add_toggle_action(view_menu, self.console_tab)
 
@@ -635,7 +637,8 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         # Settings / Preferences are all reserved keywords in macOS using this as work around
         tools_menu.addAction(_("Electrum preferences") if sys.platform == 'darwin' else _("Preferences"), self.settings_dialog)
         tools_menu.addAction(_("&Network"), lambda: self.gui_object.show_network_dialog(self))
-        tools_menu.addAction(_("&Watchtower"), lambda: self.gui_object.show_watchtower_dialog(self))
+        if self.config.get('lightning'):
+            tools_menu.addAction(_("&Watchtower"), lambda: self.gui_object.show_watchtower_dialog(self))
         tools_menu.addAction(_("&Plugins"), self.plugins_dialog)
         tools_menu.addSeparator()
         tools_menu.addAction(_("&Sign/verify message"), self.sign_verify_message)
@@ -858,8 +861,8 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
                     text +=  " [%s unconfirmed]"%(self.format_amount(u, is_diff=True).strip())
                 if x:
                     text +=  " [%s unmatured]"%(self.format_amount(x, is_diff=True).strip())
-                l = self.wallet.lnworker.get_balance()
-                if l:
+                if self.wallet.lnworker:
+                    l = self.wallet.lnworker.get_balance()
                     text += u'    \U0001f5f2 %s'%(self.format_amount_and_units(l).strip())
 
                 # append fiat balance and price
@@ -967,13 +970,14 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
         self.create_invoice_button = QPushButton(_('On-chain'))
         self.create_invoice_button.setIcon(read_QIcon("bitcoin.png"))
         self.create_invoice_button.clicked.connect(lambda: self.create_invoice(False))
-        self.create_lightning_invoice_button = QPushButton(_('Lightning'))
-        self.create_lightning_invoice_button.setIcon(read_QIcon("lightning.png"))
-        self.create_lightning_invoice_button.clicked.connect(lambda: self.create_invoice(True))
         self.receive_buttons = buttons = QHBoxLayout()
         buttons.addStretch(1)
         buttons.addWidget(self.create_invoice_button)
-        buttons.addWidget(self.create_lightning_invoice_button)
+        if self.config.get('lightning'):
+            self.create_lightning_invoice_button = QPushButton(_('Lightning'))
+            self.create_lightning_invoice_button.setIcon(read_QIcon("lightning.png"))
+            self.create_lightning_invoice_button.clicked.connect(lambda: self.create_invoice(True))
+            buttons.addWidget(self.create_lightning_invoice_button)
         grid.addLayout(buttons, 4, 3, 1, 2)
 
         self.receive_address_e = ButtonsTextEdit()

electrum/gui/qt/request_list.py

@@ -136,7 +136,8 @@ class RequestList(MyTreeView):
         self.filter()
         # lightning
         lnworker = self.wallet.lnworker
-        for key, (invoice, direction, is_paid) in lnworker.invoices.items():
+        items = lnworker.invoices.items() if lnworker else []
+        for key, (invoice, direction, is_paid) in items:
             if direction == SENT:
                 continue
             status = lnworker.get_invoice_status(key)

electrum/gui/qt/watchtower_window.py

@@ -50,6 +50,8 @@ class WatcherList(MyTreeView):
         pass
 
     def update(self):
+        if self.parent.lnwatcher is None:
+            return
         self.model().clear()
         self.update_headers({0:_('Outpoint'), 1:_('Tx'), 2:_('Status')})
         sweepstore = self.parent.lnwatcher.sweepstore

electrum/network.py

@@ -302,8 +302,12 @@ class Network(Logger):
         from . import lnrouter
         self.channel_db = lnrouter.ChannelDB(self)
         self.path_finder = lnrouter.LNPathFinder(self.channel_db)
-        self.lnwatcher = lnwatcher.LNWatcher(self)
-        self.lngossip = lnworker.LNGossip(self)
+        if self.config.get('lightning'):
+            self.lnwatcher = lnwatcher.LNWatcher(self)
+            self.lngossip = lnworker.LNGossip(self)
+        else:
+            self.lnwatcher = None
+            self.lngossip = None
 
     def run_from_another_thread(self, coro):
         assert self._loop_thread != threading.current_thread(), 'must not be called from network thread'
@@ -1146,6 +1150,11 @@ class Network(Logger):
         self._set_oneserver(self.config.get('oneserver', False))
         self._start_interface(self.default_server)
 
+        if self.lnwatcher:
+            self._jobs.append(self.lnwatcher.watchtower_task)
+        if self.lngossip:
+            self.lngossip.start_network(self)
+
         async def main():
             try:
                 await self._init_headers_file()
@@ -1160,8 +1169,6 @@ class Network(Logger):
         asyncio.run_coroutine_threadsafe(main(), self.asyncio_loop)
 
         self.trigger_callback('network_updated')
-        #
-        self.lngossip.start_network(self)
 
     def start(self, jobs: List=None):
         self._jobs = jobs or []

electrum/tests/regtest/regtest.sh

@@ -4,9 +4,9 @@ set -eu
 
 # alice -> bob -> carol
 
-alice="./run_electrum --regtest -D /tmp/alice"
-bob="./run_electrum --regtest -D /tmp/bob"
-carol="./run_electrum --regtest -D /tmp/carol"
+alice="./run_electrum --regtest --lightning -D /tmp/alice"
+bob="./run_electrum --regtest --lightning -D /tmp/bob"
+carol="./run_electrum --regtest --lightning -D /tmp/carol"
 
 if [[ $# -eq 0 ]]; then
     echo "syntax: init|start|open|status|pay|close|stop"

electrum/wallet.py

@@ -229,8 +229,7 @@ class Abstract_Wallet(AddressSynchronizer):
         if self.storage.get('wallet_type') is None:
             self.storage.put('wallet_type', self.wallet_type)
 
-        # lightning
-        self.lnworker = LNWallet(self)
+        self.lnworker = None
         # invoices and contacts
         self.invoices = InvoiceStore(self.storage)
         self.contacts = Contacts(self.storage)
@@ -250,7 +249,9 @@ class Abstract_Wallet(AddressSynchronizer):
 
     def start_network(self, network):
         AddressSynchronizer.start_network(self, network)
-        self.lnworker.start_network(network)
+        if network.config.get('lightning'):
+            self.lnworker = LNWallet(self)
+            self.lnworker.start_network(network)
 
     def load_and_cleanup(self):
         self.load_keystore()

run_electrum

@@ -352,7 +352,7 @@ if __name__ == '__main__':
         constants.set_regtest()
     elif config.get('simnet'):
         constants.set_simnet()
-    elif not config.get('reckless'):
+    elif config.get('lightning') and not config.get('reckless'):
         raise Exception('lightning branch not available on mainnet')
 
     if cmdname == 'gui':