fine-grained callbacks for lightning network dialog

electrum/channel_db.py

@@ -253,11 +253,13 @@ class ChannelDB(SqlDB):
         self._addresses = defaultdict(set)
         self._channels_for_node = defaultdict(set)
         self.data_loaded = asyncio.Event()
+        self.network = network # only for callback
 
     def update_counts(self):
+        self.num_nodes = len(self._nodes)
         self.num_channels = len(self._channels)
         self.num_policies = len(self._policies)
-        self.num_nodes = len(self._nodes)
+        self.network.trigger_callback('channel_db', self.num_nodes, self.num_channels, self.num_policies)
 
     def get_channel_ids(self):
         return set(self._channels.keys())
@@ -489,10 +491,11 @@ class ChannelDB(SqlDB):
 
     def prune_old_policies(self, delta):
         l = self.get_old_policies(delta)
-        for k in l:
-            self._policies.pop(k)
-            self.delete_policy(*k)
         if l:
+            for k in l:
+                self._policies.pop(k)
+                self.delete_policy(*k)
+            self.update_counts()
             self.logger.info(f'Deleting {len(l)} old policies')
 
     def get_orphaned_channels(self):
@@ -501,11 +504,11 @@ class ChannelDB(SqlDB):
 
     def prune_orphaned_channels(self):
         l = self.get_orphaned_channels()
-        for short_channel_id in l:
-            self.remove_channel(short_channel_id)
-            self.delete_channel(short_channel_id)
-        self.update_counts()
         if l:
+            for short_channel_id in l:
+                self.remove_channel(short_channel_id)
+                self.delete_channel(short_channel_id)
+            self.update_counts()
             self.logger.info(f'Deleting {len(l)} orphaned channels')
 
     def add_channel_update_for_private_channel(self, msg_payload: dict, start_node_id: bytes):

electrum/gui/qt/lightning_dialog.py

@@ -43,7 +43,6 @@ class LightningDialog(QDialog):
         self.network = gui_object.daemon.network
         self.setWindowTitle(_('Lightning Network'))
         self.setMinimumSize(600, 20)
-
         vbox = QVBoxLayout(self)
         self.num_peers = QLabel('')
         vbox.addWidget(self.num_peers)
@@ -54,16 +53,24 @@ class LightningDialog(QDialog):
         self.status = QLabel('')
         vbox.addWidget(self.status)
         vbox.addStretch(1)
-
         b = QPushButton(_('Close'))
         b.clicked.connect(self.close)
         vbox.addLayout(Buttons(b))
-        self.network.register_callback(self.update_status, ['ln_status'])
+        self.network.register_callback(self.on_channel_db, ['channel_db'])
+        self.network.register_callback(self.set_num_peers, ['gossip_peers'])
+        self.network.register_callback(self.set_unknown_channels, ['unknown_channels'])
+        self.network.channel_db.update_counts() # trigger callback
+        self.set_num_peers('', self.network.lngossip.num_peers())
+        self.set_unknown_channels('', len(self.network.lngossip.unknown_ids))
 
-    def update_status(self, event, num_peers, num_nodes, known, unknown):
-        self.num_peers.setText(_(f'Connected to {num_peers} peers'))
+    def on_channel_db(self, event, num_nodes, num_channels, num_policies):
         self.num_nodes.setText(_(f'{num_nodes} nodes'))
-        self.num_channels.setText(_(f'{known} channels'))
+        self.num_channels.setText(_(f'{num_channels} channels'))
+
+    def set_num_peers(self, event, num_peers):
+        self.num_peers.setText(_(f'Connected to {num_peers} peers'))
+
+    def set_unknown_channels(self, event, unknown):
         self.status.setText(_(f'Requesting {unknown} channels...') if unknown else '')
 
     def is_hidden(self):

electrum/lnpeer.py

@@ -293,9 +293,6 @@ class Peer(Logger):
                             self.orphan_channel_updates.popitem(last=False)
                 if categorized_chan_upds.good:
                     self.logger.debug(f'on_channel_update: {len(categorized_chan_upds.good)}/{len(chan_upds_chunk)}')
-            # refresh gui
-            if chan_anns or node_anns or chan_upds:
-                self.network.lngossip.refresh_gui()
 
     def verify_channel_announcements(self, chan_anns):
         for payload in chan_anns:

electrum/lnworker.py

@@ -155,10 +155,11 @@ class LNWorker(Logger):
         peer = Peer(self, node_id, transport)
         await self.network.main_taskgroup.spawn(peer.main_loop())
         self.peers[node_id] = peer
-        #if self.network.lngossip:
-        #    self.network.lngossip.refresh_gui()
         return peer
 
+    def num_peers(self):
+        return sum([p.initialized.is_set() for p in self.peers.values()])
+
     def start_network(self, network: 'Network'):
         self.network = network
         self.config = network.config
@@ -279,28 +280,20 @@ class LNGossip(LNWorker):
         super().start_network(network)
         asyncio.run_coroutine_threadsafe(self.network.main_taskgroup.spawn(self.maintain_db()), self.network.asyncio_loop)
 
-    def refresh_gui(self):
-        # refresh gui
-        known = self.channel_db.num_channels
-        unknown = len(self.unknown_ids)
-        num_nodes = self.channel_db.num_nodes
-        num_peers = sum([p.initialized.is_set() for p in self.peers.values()])
-        self.logger.info(f'Channels: {known}. Missing: {unknown}')
-        self.network.trigger_callback('ln_status', num_peers, num_nodes, known, unknown)
-
     async def maintain_db(self):
         await self.channel_db.load_data()
         while True:
             if len(self.unknown_ids) == 0:
                 self.channel_db.prune_old_policies(self.max_age)
                 self.channel_db.prune_orphaned_channels()
-            self.refresh_gui()
             await asyncio.sleep(120)
 
     async def add_new_ids(self, ids):
         known = self.channel_db.get_channel_ids()
         new = set(ids) - set(known)
         self.unknown_ids.update(new)
+        self.network.trigger_callback('unknown_channels', len(self.unknown_ids))
+        self.network.trigger_callback('gossip_peers', self.num_peers())
 
     def get_ids_to_query(self):
         N = 500