fix display of short_channel_id for channel backups

electrum/gui/qt/channels_list.py

@@ -209,9 +209,6 @@ class ChannelsList(MyTreeView):
     def do_update_single_row(self, wallet: Abstract_Wallet, chan: AbstractChannel):
         if wallet != self.parent.wallet:
             return
-        lnworker = wallet.lnworker
-        if not lnworker:
-            return
         for row in range(self.model().rowCount()):
             item = self.model().item(row, self.Columns.NODE_ALIAS)
             if item.data(ROLE_CHANNEL_ID) != chan.channel_id:
@@ -220,7 +217,8 @@ class ChannelsList(MyTreeView):
                 self.model().item(row, column).setData(v, QtCore.Qt.DisplayRole)
             items = [self.model().item(row, column) for column in self.Columns]
             self._update_chan_frozen_bg(chan=chan, items=items)
-        self.update_can_send(lnworker)
+        if wallet.lnworker:
+            self.update_can_send(wallet.lnworker)
 
     @QtCore.pyqtSlot()
     def on_gossip_db(self):

electrum/lnchannel.py

@@ -293,6 +293,9 @@ class AbstractChannel(Logger, ABC):
                             closing_txid: str, closing_height: TxMinedInfo, keep_watching: bool) -> None:
         self.save_funding_height(txid=funding_txid, height=funding_height.height, timestamp=funding_height.timestamp)
         self.save_closing_height(txid=closing_txid, height=closing_height.height, timestamp=closing_height.timestamp)
+        if funding_height.conf>0:
+            self.set_short_channel_id(ShortChannelID.from_components(
+                funding_height.height, funding_height.txpos, self.funding_outpoint.output_index))
         if self.get_state() < ChannelState.CLOSED:
             conf = closing_height.conf
             if conf > 0:
@@ -435,9 +438,15 @@ class ChannelBackup(AbstractChannel):
     def is_initiator(self):
         return self.cb.is_initiator
 
+    def short_id_for_GUI(self) -> str:
+        if self.short_channel_id:
+            return 'BACKUP of ' + format_short_channel_id(self.short_channel_id)
+        else:
+            return 'BACKUP'
+
     def get_state_for_GUI(self):
         cs = self.get_state()
-        return 'BACKUP, ' + cs.name
+        return cs.name
 
     def get_oldest_unrevoked_ctn(self, who):
         return -1

electrum/lnworker.py

@@ -1436,7 +1436,7 @@ class LNBackups(Logger):
         pass
 
     async def on_channel_update(self, chan):
-        pass
+        util.trigger_callback('channel', self.wallet, chan)
 
     def channel_by_txo(self, txo):
         with self.lock: