From 9b48a97f654fc385b71c5feac91e7f30f80b98d1 Mon Sep 17 00:00:00 2001
From: SomberNight <somber.night@protonmail.com>
Date: Thu, 21 Jul 2022 17:06:20 +0200
Subject: [PATCH] lnutil.LnFeatures.get_names: don't return `None`s for unknown
 features

follow-up https://github.com/spesmilo/electrum/commit/85d354bf24525b5c636ecc15b82a17567bfa431c

`'\n'.join(lnaddr.get_features().get_names())` would raise otherwise
---
 electrum/lnutil.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/electrum/lnutil.py b/electrum/lnutil.py
index 85e9677b7..e461ddb21 100644
--- a/electrum/lnutil.py
+++ b/electrum/lnutil.py
@@ -1192,10 +1192,11 @@ class LnFeatures(IntFlag):
         return (flag in our_flags
                 or get_ln_flag_pair_of_bit(flag) in our_flags)
 
-    def get_names(self):
+    def get_names(self) -> Sequence[str]:
         r = []
         for flag in list_enabled_bits(self):
-            r.append(LnFeatures(1 << flag).name)
+            feature_name = LnFeatures(1 << flag).name
+            r.append(feature_name or f"bit_{flag}")
         return r