From 685218247a83215060008de46e2173398527b42f Mon Sep 17 00:00:00 2001
From: Christian Gick <service@agiliton.eu>
Date: Sun, 22 Feb 2026 07:02:33 +0200
Subject: [PATCH] fix: Use empty bytes instead of None for shared_key

NoneType causes TypeError in patched room.py proto assignment.
Empty bytes is falsy so shared_key is not set in proto,
initializing key provider in per-participant mode.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 voice.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/voice.py b/voice.py
index d1c3319..3f5dbd9 100644
--- a/voice.py
+++ b/voice.py
@@ -76,7 +76,7 @@ def _build_e2ee_options() -> rtc.E2EEOptions:
     Element Call uses: ratchetWindowSize=16, keyringSize=256, salt="LKFrameEncryptionKey"
     """
     key_opts = rtc.KeyProviderOptions(
-        shared_key=None,
+        shared_key=b"",
         ratchet_window_size=16,
         ratchet_salt=b"LKFrameEncryptionKey",
         failure_tolerance=-1,