1 files changed, 4 insertions, 1 deletions
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index 5bfdbe8126..4b25f891ca 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -550,6 +550,8 @@ class FederationClient(FederationBase):
         Does so by asking one of the already participating servers to create an
         event with proper context.
 
+        Returns a fully signed and hashed event.
+
         Note that this does not append any events to any graphs.
 
         Args:
@@ -703,7 +705,8 @@ class FederationClient(FederationBase):
                     break
 
             if room_version is None:
-                # We use this error has that is what
+                # If the state doesn't have a create event then the room is
+                # invalid, and it would fail auth checks anyway.
                 raise SynapseError(400, "No create event in state")
 
             valid_pdus = yield self._check_sigs_and_hash_and_fetch(