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-rw-r--r--synapse/rest/client/receipts.py20
1 files changed, 8 insertions, 12 deletions
diff --git a/synapse/rest/client/receipts.py b/synapse/rest/client/receipts.py
index 4b03eb876b..409bfd43c1 100644
--- a/synapse/rest/client/receipts.py
+++ b/synapse/rest/client/receipts.py
@@ -39,31 +39,27 @@ class ReceiptRestServlet(RestServlet):
 
     def __init__(self, hs: "HomeServer"):
         super().__init__()
-        self.hs = hs
         self.auth = hs.get_auth()
         self.receipts_handler = hs.get_receipts_handler()
         self.read_marker_handler = hs.get_read_marker_handler()
         self.presence_handler = hs.get_presence_handler()
 
+        self._known_receipt_types = {ReceiptTypes.READ}
+        if hs.config.experimental.msc2285_enabled:
+            self._known_receipt_types.update(
+                (ReceiptTypes.READ_PRIVATE, ReceiptTypes.FULLY_READ)
+            )
+
     async def on_POST(
         self, request: SynapseRequest, room_id: str, receipt_type: str, event_id: str
     ) -> Tuple[int, JsonDict]:
         requester = await self.auth.get_user_by_req(request)
 
-        if self.hs.config.experimental.msc2285_enabled and receipt_type not in [
-            ReceiptTypes.READ,
-            ReceiptTypes.READ_PRIVATE,
-            ReceiptTypes.FULLY_READ,
-        ]:
+        if receipt_type not in self._known_receipt_types:
             raise SynapseError(
                 400,
-                "Receipt type must be 'm.read', 'org.matrix.msc2285.read.private' or 'm.fully_read'",
+                f"Receipt type must be {', '.join(self._known_receipt_types)}",
             )
-        elif (
-            not self.hs.config.experimental.msc2285_enabled
-            and receipt_type != ReceiptTypes.READ
-        ):
-            raise SynapseError(400, "Receipt type must be 'm.read'")
 
         parse_json_object_from_request(request, allow_empty_body=False)