Setup element-call

config/hosts/matrix/matrix-synapse.nix

@@ -46,6 +46,28 @@
       ];
       turn_user_lifetime = 86400000;
       turn_allow_guests = true;
+      experimental_features = {
+        # MSC3266: Room summary API. Used for knocking over federation
+        msc3266_enabled = true;
+        # MSC4222 needed for syncv2 state_after. This allow clients to
+        # correctly track the state of the room.
+        msc4222_enabled = true;
+      };
+      # The maximum allowed duration by which sent events can be delayed, as
+      # per MSC4140.
+      max_event_delay_duration = "24h";
+      rc_message = {
+        # This needs to match at least e2ee key sharing frequency plus a bit of headroom
+        # Note key sharing events are bursty
+        per_second = 0.5;
+        burst_count = 30;
+      };
+      rc_delayed_event_mgmt = {
+        # This needs to match at least the heart-beat frequency plus a bit of headroom
+        # Currently the heart-beat is every 5 seconds which translates into a rate of 0.2s
+        per_second = 1;
+        burst_count = 20;
+      };
     };
     extras = [ "oidc" ];
     extraConfigFiles = [