diff --git a/synapse/handlers/receipts.py b/synapse/handlers/receipts.py
index 4911a11535..5cb1ff749d 100644
--- a/synapse/handlers/receipts.py
+++ b/synapse/handlers/receipts.py
@@ -14,7 +14,7 @@
import logging
from typing import TYPE_CHECKING, Iterable, List, Optional, Tuple
-from synapse.api.constants import ReadReceiptEventFields
+from synapse.api.constants import ReadReceiptEventFields, ReceiptTypes
from synapse.appservice import ApplicationService
from synapse.streams import EventSource
from synapse.types import JsonDict, ReadReceipt, UserID, get_domain_from_id
@@ -178,7 +178,7 @@ class ReceiptEventSource(EventSource[int, JsonDict]):
for event_id in content.keys():
event_content = content.get(event_id, {})
- m_read = event_content.get("m.read", {})
+ m_read = event_content.get(ReceiptTypes.READ, {})
# If m_read is missing copy over the original event_content as there is nothing to process here
if not m_read:
@@ -206,7 +206,7 @@ class ReceiptEventSource(EventSource[int, JsonDict]):
# Set new users unless empty
if len(new_users.keys()) > 0:
- new_event["content"][event_id] = {"m.read": new_users}
+ new_event["content"][event_id] = {ReceiptTypes.READ: new_users}
# Append new_event to visible_events unless empty
if len(new_event["content"].keys()) > 0:
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index f3039c3c3f..96f37e9f42 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -28,7 +28,7 @@ from typing import (
import attr
from prometheus_client import Counter
-from synapse.api.constants import AccountDataTypes, EventTypes, Membership
+from synapse.api.constants import AccountDataTypes, EventTypes, Membership, ReceiptTypes
from synapse.api.filtering import FilterCollection
from synapse.api.presence import UserPresenceState
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
@@ -1046,7 +1046,7 @@ class SyncHandler:
last_unread_event_id = await self.store.get_last_receipt_event_id_for_user(
user_id=sync_config.user.to_string(),
room_id=room_id,
- receipt_type="m.read",
+ receipt_type=ReceiptTypes.READ,
)
notifs = await self.store.get_unread_event_push_actions_by_room_for_user(
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