Additional type hints for REST servlets (part 2). (#10674)

Applies the changes from #10665 to additional modules.

synapse/rest/client/notifications.py

@@ -13,26 +13,33 @@
 # limitations under the License.
 
 import logging
+from typing import TYPE_CHECKING, Tuple
 
 from synapse.events.utils import format_event_for_client_v2_without_room_id
+from synapse.http.server import HttpServer
 from synapse.http.servlet import RestServlet, parse_integer, parse_string
+from synapse.http.site import SynapseRequest
+from synapse.types import JsonDict
 
 from ._base import client_patterns
 
+if TYPE_CHECKING:
+    from synapse.server import HomeServer
+
 logger = logging.getLogger(__name__)
 
 
 class NotificationsServlet(RestServlet):
     PATTERNS = client_patterns("/notifications$")
 
-    def __init__(self, hs):
+    def __init__(self, hs: "HomeServer"):
         super().__init__()
         self.store = hs.get_datastore()
         self.auth = hs.get_auth()
         self.clock = hs.get_clock()
         self._event_serializer = hs.get_event_client_serializer()
 
-    async def on_GET(self, request):
+    async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
         requester = await self.auth.get_user_by_req(request)
         user_id = requester.user.to_string()
 
@@ -87,5 +94,5 @@ class NotificationsServlet(RestServlet):
         return 200, {"notifications": returned_push_actions, "next_token": next_token}
 
 
-def register_servlets(hs, http_server):
+def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
     NotificationsServlet(hs).register(http_server)