guis: reintroduce suggest button

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

@@ -71,6 +71,11 @@ Builder.load_string('''
                 size_hint: 0.5, None
                 height: '48dp'
                 on_release: app.scan_qr(on_complete=s.on_qr)
+            Button:
+                text: _('Suggest')
+                size_hint: 1, None
+                height: '48dp'
+                on_release: s.suggest_node()
             Button:
                 text: _('Clear')
                 size_hint: 1, None
@@ -97,6 +102,18 @@ class LightningOpenChannelDialog(Factory.Popup, Logger):
         d = LabelDialog(_('IP/port in format:\n[host]:[port]'), self.ipport, callback)
         d.open()
 
+    def suggest_node(self):
+        self.app.wallet.network.start_gossip()
+        suggested = self.app.wallet.lnworker.lnrater.suggest_peer()
+        _, _, percent = self.app.wallet.network.lngossip.get_sync_progress_estimate()
+
+        if suggested:
+            self.pubkey = suggested.hex()
+        else:
+            if percent is None:
+                percent = "??"
+            self.pubkey = f"Please wait, graph is updating ({percent}% / 30% done)."
+
     def __init__(self, app, lnaddr=None, msg=None):
         Factory.Popup.__init__(self)
         Logger.__init__(self)

electrum/gui/qt/channels_list.py

@@ -356,8 +356,20 @@ class ChannelsList(MyTreeView):
         max_button = EnterButton(_("Max"), spend_max)
         max_button.setFixedWidth(100)
         max_button.setCheckable(True)
+
+        suggest_button = QPushButton(d, text=_('Suggest Peer'))
+        def on_suggest():
+            self.parent.wallet.network.start_gossip()
+            nodeid = bh2u(lnworker.lnrater.suggest_peer() or b'')
+            if not nodeid:
+                remote_nodeid.setText(
+                    "Please wait until the graph is synchronized to 30%.")
+            else:
+                remote_nodeid.setText(nodeid)
+            remote_nodeid.repaint()  # macOS hack for #6269
+        suggest_button.clicked.connect(on_suggest)
+
         clear_button = QPushButton(d, text=_('Clear'))
-        clear_button.setFixedWidth(100)
         def on_clear():
             amount_e.setText('')
             amount_e.setFrozen(False)
@@ -367,16 +379,16 @@ class ChannelsList(MyTreeView):
             max_button.setChecked(False)
             max_button.repaint()  # macOS hack for #6269
         clear_button.clicked.connect(on_clear)
-
         h = QGridLayout()
         h.addWidget(QLabel(_('Your Node ID')), 0, 0)
-        h.addWidget(local_nodeid, 0, 1, 1, 4)
+        h.addWidget(local_nodeid, 0, 1, 1, 3)
         h.addWidget(QLabel(_('Remote Node ID')), 1, 0)
-        h.addWidget(remote_nodeid, 1, 1, 1, 4)
+        h.addWidget(remote_nodeid, 1, 1, 1, 3)
+        h.addWidget(suggest_button, 2, 1)
+        h.addWidget(clear_button, 2, 2)
         h.addWidget(QLabel('Amount'), 3, 0)
         h.addWidget(amount_e, 3, 1)
         h.addWidget(max_button, 3, 2)
-        h.addWidget(clear_button, 3, 3)
         vbox.addLayout(h)
         ok_button = OkButton(d)
         ok_button.setDefault(True)