Support room version 11 (#15912)

And fix a bug in the implementation of the updated redaction
format (MSC2174) where the top-level redacts field was not
properly added for backwards-compatibility.

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/events/builder.py b/synapse/events/builder.py

index a254548c6c..14ea0e6640 100644
--- a/synapse/events/builder.py
+++ b/synapse/events/builder.py
@@ -175,7 +175,7 @@ class EventBuilder:
 
         # MSC2174 moves the redacts property to the content, it is invalid to
         # provide it as a top-level property.
-        if self._redacts is not None and not self.room_version.msc2176_redaction_rules:
+        if self._redacts is not None and not self.room_version.updated_redaction_rules:
             event_dict["redacts"] = self._redacts
 
         if self._origin_server_ts is not None: