1 files changed, 9 insertions, 1 deletions
diff --git a/synapse/federation/federation_base.py b/synapse/federation/federation_base.py
index 896168c05c..fab6da3c08 100644
--- a/synapse/federation/federation_base.py
+++ b/synapse/federation/federation_base.py
@@ -47,6 +47,11 @@ class FederationBase:
     ) -> EventBase:
         """Checks that event is correctly signed by the sending server.
 
+        Also checks the content hash, and redacts the event if there is a mismatch.
+
+        Also runs the event through the spam checker; if it fails, redacts the event
+        and flags it as soft-failed.
+
         Args:
             room_version: The room version of the PDU
             pdu: the event to be checked
@@ -55,7 +60,10 @@ class FederationBase:
               * the original event if the checks pass
               * a redacted version of the event (if the signature
                 matched but the hash did not)
-              * throws a SynapseError if the signature check failed."""
+
+        Raises:
+              SynapseError if the signature check failed.
+        """
         try:
             await _check_sigs_on_pdu(self.keyring, room_version, pdu)
         except SynapseError as e: