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-rw-r--r--synapse/replication/tcp/streams/events.py16
1 files changed, 11 insertions, 5 deletions
diff --git a/synapse/replication/tcp/streams/events.py b/synapse/replication/tcp/streams/events.py
index d97669c886..0843e5aa90 100644
--- a/synapse/replication/tcp/streams/events.py
+++ b/synapse/replication/tcp/streams/events.py
@@ -13,7 +13,9 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
 import heapq
+from typing import Tuple, Type
 
 import attr
 
@@ -63,7 +65,8 @@ class BaseEventsStreamRow(object):
     Specifies how to identify, serialize and deserialize the different types.
     """
 
-    TypeId = None  # Unique string that ids the type. Must be overriden in sub classes.
+    # Unique string that ids the type. Must be overriden in sub classes.
+    TypeId = None  # type: str
 
     @classmethod
     def from_data(cls, data):
@@ -99,9 +102,12 @@ class EventsStreamCurrentStateRow(BaseEventsStreamRow):
     event_id = attr.ib()  # str, optional
 
 
-TypeToRow = {
-    Row.TypeId: Row for Row in (EventsStreamEventRow, EventsStreamCurrentStateRow)
-}
+_EventRows = (
+    EventsStreamEventRow,
+    EventsStreamCurrentStateRow,
+)  # type: Tuple[Type[BaseEventsStreamRow], ...]
+
+TypeToRow = {Row.TypeId: Row for Row in _EventRows}
 
 
 class EventsStream(Stream):
@@ -112,7 +118,7 @@ class EventsStream(Stream):
 
     def __init__(self, hs):
         self._store = hs.get_datastore()
-        self.current_token = self._store.get_current_events_token
+        self.current_token = self._store.get_current_events_token  # type: ignore
 
         super(EventsStream, self).__init__(hs)