test funding_txn_minimum_depth, show it in GUI

electrum/commands.py

@@ -782,7 +782,8 @@ class Commands:
 
     @command('wpn')
     def open_channel(self, connection_string, amount, channel_push=0, password=None):
-        return self.lnworker.open_channel(connection_string, satoshis(amount), satoshis(channel_push), password)
+        chan = self.lnworker.open_channel(connection_string, satoshis(amount), satoshis(channel_push), password)
+        return chan.funding_outpoint.to_str()
 
     @command('wn')
     def lnpay(self, invoice, attempts=1, timeout=10):

electrum/gui/kivy/uix/dialogs/lightning_open_channel.py

@@ -136,8 +136,14 @@ class LightningOpenChannelDialog(Factory.Popup):
 
     def do_open_channel(self, conn_str, amount, password):
         try:
-            node_id_hex = self.app.wallet.lnworker.open_channel(conn_str, amount, 0, password=password)
+            chan = self.app.wallet.lnworker.open_channel(conn_str, amount, 0, password=password)
         except Exception as e:
             self.app.show_error(_('Problem opening channel: ') + '\n' + repr(e))
             return
-        self.app.show_info(_('Please wait for confirmation, channel is opening with node ') + node_id_hex[:16])
+        n = chan.constraints.funding_txn_minimum_depth
+        message = '\n'.join([
+            _('Channel established.'),
+            _('Remote peer ID') + ':' + chan.node_id.hex(),
+            _('This channel will be usable after {} confirmations').format(n)
+        ])
+        self.app.show_info(message)

electrum/gui/qt/main_window.py

@@ -1839,12 +1839,14 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
     def open_channel(self, *args, **kwargs):
         def task():
             return self.wallet.lnworker.open_channel(*args, **kwargs)
-        def on_success(node_id):
+        def on_success(chan):
-            self.show_message('\n'.join([
+            n = chan.constraints.funding_txn_minimum_depth
+            message = '\n'.join([
                 _('Channel established.'),
-                _('Remote peer ID') + ':' + node_id,
+                _('Remote peer ID') + ':' + chan.node_id.hex(),
-                _('This channel will be usable after 3 confirmations')
+                _('This channel will be usable after {} confirmations').format(n)
-            ]))
+            ])
+            self.show_message(message)
         def on_failure(exc_info):
             type_, e, traceback = exc_info
             self.show_error(_('Could not open channel: {}').format(e))

electrum/lnpeer.py

@@ -498,7 +498,10 @@ class Peer(Logger):
             raise Exception('Remote Lightning peer reported error: ' + repr(payload.get('error')))
         remote_per_commitment_point = payload['first_per_commitment_point']
         funding_txn_minimum_depth = int.from_bytes(payload['minimum_depth'], 'big')
-        assert funding_txn_minimum_depth > 0, funding_txn_minimum_depth
+        if funding_txn_minimum_depth <= 0:
+            raise Exception(f"minimum depth too low, {funding_txn_minimum_depth}")
+        if funding_txn_minimum_depth > 30:
+            raise Exception(f"minimum depth too high, {funding_txn_minimum_depth}")
         remote_dust_limit_sat = int.from_bytes(payload['dust_limit_satoshis'], byteorder='big')
         remote_reserve_sat = self.validate_remote_reserve(payload["channel_reserve_satoshis"], remote_dust_limit_sat, funding_sat)
         if remote_dust_limit_sat > remote_reserve_sat:

electrum/lnworker.py

@@ -717,7 +717,7 @@ class LNWallet(LNWorker):
             chan = fut.result(timeout=timeout)
         except concurrent.futures.TimeoutError:
             raise Exception(_("open_channel timed out"))
-        return chan.funding_outpoint.to_str()
+        return chan
 
     def pay(self, invoice, attempts=1, amount_sat=None, timeout=10):
         """