1 files changed, 10 insertions, 0 deletions
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index 312196675e..f4f1ac27c0 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -85,6 +85,7 @@ class EventTypes(object):
     RoomAvatar = "m.room.avatar"
     RoomEncryption = "m.room.encryption"
     GuestAccess = "m.room.guest_access"
+    Encryption = "m.room.encryption"
 
     # These are used for validation
     Message = "m.room.message"
@@ -94,6 +95,8 @@ class EventTypes(object):
     ServerACL = "m.room.server_acl"
     Pinned = "m.room.pinned_events"
 
+    Retention = "m.room.retention"
+
 
 class RejectedReason(object):
     AUTH_ERROR = "auth_error"
@@ -138,3 +141,10 @@ class LimitBlockingTypes(object):
 
     MONTHLY_ACTIVE_USER = "monthly_active_user"
     HS_DISABLED = "hs_disabled"
+
+
+class EventContentFields(object):
+    """Fields found in events' content, regardless of type."""
+
+    # Labels for the event, cf https://github.com/matrix-org/matrix-doc/pull/2326
+    LABELS = "org.matrix.labels"