Qt gui: show messages about payment outcome

electrum/gui/qt/main_window.py

@@ -225,7 +225,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
             interests = ['wallet_updated', 'network_updated', 'blockchain_updated',
                          'new_transaction', 'status',
                          'banner', 'verified', 'fee', 'fee_histogram', 'on_quotes',
-                         'on_history', 'channel', 'channels', 'ln_status']
+                         'on_history', 'channel', 'channels', 'ln_status', 'ln_message']
             # To avoid leaking references to "self" that prevent the
             # window from being GC-ed when closed, callbacks should be
             # methods of this class only, and specifically not be
@@ -362,7 +362,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
             wallet, tx = args
             if wallet == self.wallet:
                 self.tx_notification_queue.put(tx)
-        elif event in ['status', 'banner', 'verified', 'fee', 'fee_histogram']:
+        elif event in ['status', 'banner', 'verified', 'fee', 'fee_histogram', 'ln_message']:
             # Handle in GUI thread
             self.network_signal.emit(event, args)
         elif event == 'on_quotes':
@@ -397,6 +397,10 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, Logger):
                 self.fee_slider.update()
                 self.require_fee_update = True
             self.history_model.on_fee_histogram()
+        elif event == 'ln_message':
+            lnworker, message = args
+            if lnworker == self.wallet.lnworker:
+                self.show_message(message)
         else:
             self.logger.info(f"unexpected network_qt signal: {event} {args}")
 

electrum/lnbase.py

@@ -870,6 +870,7 @@ class Peer(PrintError):
         self.send_commitment(chan)  # htlc will be removed
         await self.receive_revoke(chan)
         self.lnworker.save_channel(chan)
+        self.network.trigger_callback('ln_message', self.lnworker, 'Payment failed')
 
     async def _handle_error_code_from_failed_htlc(self, error_reason, route: List[RouteEdge], channel_id, htlc_id):
         chan = self.channels[channel_id]
@@ -985,6 +986,7 @@ class Peer(PrintError):
         self.send_commitment(chan) # htlc will be removed
         await self.receive_revoke(chan)
         self.lnworker.save_channel(chan)
+        self.network.trigger_callback('ln_message', self.lnworker, 'Payment sent')
 
         # used in lightning-integration
         self.payment_preimages[sha256(preimage)].put_nowait(preimage)
@@ -1018,6 +1020,7 @@ class Peer(PrintError):
         chan.settle_htlc(preimage, htlc_id)
         await self.update_channel(chan, "update_fulfill_htlc", channel_id=channel_id, id=htlc_id, payment_preimage=preimage)
         self.lnworker.save_channel(chan)
+        self.network.trigger_callback('ln_message', self.lnworker, 'Payment received')
 
     def on_revoke_and_ack(self, payload):
         print("got revoke_and_ack")