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fix(e2ee): extend key rotation wait to 10s, debug late key events

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EC rotates encryption key when bot joins LiveKit room. The rotated
key arrives via Matrix sync 3-5s later. Previous 2s wait was too
short - DEC_FAILED before new key arrived.

Extended wait to 10s. Added logging to bot.py to trace why late
key events were not being processed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Christian Gick
2026-02-22 21:54:27 +02:00
parent 230c083b7b
commit 4b4a150fbf
2 changed files with 39 additions and 12 deletions
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16
bot.py
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@@ -376,17 +376,25 @@ class Bot:
if event.sender == BOT_USER:
return # ignore our own key events
room_id = room.room_id
logger.info("Got encryption_keys timeline event from %s in %s", event.sender, room_id)
content = event.source.get("content", {})
device_id = content.get("device_id", "")
keys_list = content.get("keys", [])
logger.info("Got encryption_keys timeline event from %s in %s (device=%s, keys=%d, content_keys=%s)",
event.sender, room_id, device_id, len(keys_list), list(content.keys()))
vs = self.voice_sessions.get(room_id)
if vs:
content = event.source.get("content", {})
device_id = content.get("device_id", "")
for k in content.get("keys", []):
for k in keys_list:
if "key" in k and "index" in k:
key_b64 = k["key"]
key_b64 += "=" * (-len(key_b64) % 4)
key_bytes = base64.urlsafe_b64decode(key_b64)
vs.on_encryption_key(event.sender, device_id, key_bytes, k["index"])
else:
logger.warning("encryption_keys event missing key/index: %s", k)
if not keys_list:
logger.warning("encryption_keys event has empty keys list, full content: %s", content)
else:
logger.warning("No voice session for room %s to deliver encryption key", room_id)
return
if event.type != CALL_MEMBER_TYPE: