Qt: ask confirmation before closing channel.

electrum/gui/qt/channel_details.py

@@ -11,6 +11,8 @@ from electrum.lnchannel import htlcsum
 from electrum.lnaddr import LnAddr, lndecode
 from electrum.bitcoin import COIN
 
+from .util import Buttons, CloseButton
+
 if TYPE_CHECKING:
     from .main_window import ElectrumWindow
 
@@ -151,6 +153,6 @@ class ChannelDetailsDialog(QtWidgets.QDialog):
         w.setModel(self.make_model(htlc_dict))
         w.header().setSectionResizeMode(0, QtWidgets.QHeaderView.ResizeToContents)
         vbox.addWidget(w)
-
+        vbox.addLayout(Buttons(CloseButton(self)))
         # initialize sent/received fields
         self.update_sent_received()

electrum/gui/qt/channels_list.py

@@ -81,6 +81,9 @@ class ChannelsList(MyTreeView):
         self.main_window.show_error('Failed to close channel:\n{}'.format(repr(e)))
 
     def close_channel(self, channel_id):
+        msg = _('Close channel?')
+        if not self.parent.question(msg):
+            return
         def task():
             coro = self.lnworker.close_channel(channel_id)
             return self.network.run_from_another_thread(coro)