add lnworker.main_loop to network.futures so it gets cancelled on exit. fix aiosafe verbosity.

electrum/lnbase.py

@@ -275,7 +275,7 @@ def aiosafe(f):
         try:
             return await f(*args, **kwargs)
         except BaseException as e:
-            self.print_msg("Exception in", f.__name__, ":", e.__class__.__name__, str(e))
+            self.print_error("Exception in", f.__name__, ":", e.__class__.__name__, str(e))
             self.exception = e
     return f2
 

electrum/lnworker.py

@@ -46,7 +46,7 @@ class LNWorker(PrintError):
         # wait until we see confirmations
         self.network.register_callback(self.on_network_update, ['updated', 'verified']) # thread safe
         self.on_network_update('updated') # shortcut (don't block) if funding tx locked and verified
-        asyncio.run_coroutine_threadsafe(self.main_loop(), asyncio.get_event_loop())
+        self.network.futures.append(asyncio.run_coroutine_threadsafe(self.main_loop(), asyncio.get_event_loop()))
 
     def channels_for_peer(self, node_id):
         assert type(node_id) is bytes