Change error code to MSC3895

Author: reivilibre

synapse/api/errors.py

@@ -103,8 +103,8 @@ class Codes(str, Enum):
     # Returned for federation requests where we can't process a request as we
     # can't ensure the sending server is in a room which is partial-stated on
     # our side.
-    # Part of MSC3706-rei1.
-    UNABLE_DUE_TO_PARTIAL_STATE = "ORG.MATRIX.MSC3706_UNABLE_DUE_TO_PARTIAL_STATE"
+    # Part of MSC3895.
+    UNABLE_DUE_TO_PARTIAL_STATE = "ORG.MATRIX.MSC3895_UNABLE_DUE_TO_PARTIAL_STATE"
 
 
 class CodeMessageException(RuntimeError):

synapse/config/experimental.py

@@ -63,7 +63,8 @@ def read_config(self, config: JsonDict, **kwargs: Any) -> None:
         # MSC3706 (server-side support for partial state in /send_join responses)
         self.msc3706_enabled: bool = experimental.get("msc3706_enabled", False)
 
-        # experimental support for faster joins over federation (msc2775, msc3706)
+        # experimental support for faster joins over federation
+        # (MSC2775, MSC3706, MSC3895)
         # requires a target server with msc3706_enabled enabled.
         self.faster_joins_enabled: bool = experimental.get("faster_joins", False)