3 files changed, 16 insertions, 5 deletions
diff --git a/synapse/appservice/__init__.py b/synapse/appservice/__init__.py
index 65615f50b8..35c330a3c4 100644
--- a/synapse/appservice/__init__.py
+++ b/synapse/appservice/__init__.py
@@ -16,7 +16,7 @@
 import logging
 import re
 from enum import Enum
-from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Pattern
+from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Pattern, Sequence
 
 import attr
 from netaddr import IPSet
@@ -377,7 +377,7 @@ class AppServiceTransaction:
         self,
         service: ApplicationService,
         id: int,
-        events: List[EventBase],
+        events: Sequence[EventBase],
         ephemeral: List[JsonDict],
         to_device_messages: List[JsonDict],
         one_time_keys_count: TransactionOneTimeKeysCount,
diff --git a/synapse/appservice/api.py b/synapse/appservice/api.py
index edafd433cd..1a6f69e7d3 100644
--- a/synapse/appservice/api.py
+++ b/synapse/appservice/api.py
@@ -14,7 +14,17 @@
 # limitations under the License.
 import logging
 import urllib.parse
-from typing import TYPE_CHECKING, Any, Dict, Iterable, List, Mapping, Optional, Tuple
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Dict,
+    Iterable,
+    List,
+    Mapping,
+    Optional,
+    Sequence,
+    Tuple,
+)
 
 from prometheus_client import Counter
 from typing_extensions import TypeGuard
@@ -259,7 +269,7 @@ class ApplicationServiceApi(SimpleHttpClient):
     async def push_bulk(
         self,
         service: "ApplicationService",
-        events: List[EventBase],
+        events: Sequence[EventBase],
         ephemeral: List[JsonDict],
         to_device_messages: List[JsonDict],
         one_time_keys_count: TransactionOneTimeKeysCount,
diff --git a/synapse/appservice/scheduler.py b/synapse/appservice/scheduler.py
index 7b562795a3..3a319b0d42 100644
--- a/synapse/appservice/scheduler.py
+++ b/synapse/appservice/scheduler.py
@@ -57,6 +57,7 @@ from typing import (
     Iterable,
     List,
     Optional,
+    Sequence,
     Set,
     Tuple,
 )
@@ -364,7 +365,7 @@ class _TransactionController:
     async def send(
         self,
         service: ApplicationService,
-        events: List[EventBase],
+        events: Sequence[EventBase],
         ephemeral: Optional[List[JsonDict]] = None,
         to_device_messages: Optional[List[JsonDict]] = None,
         one_time_keys_count: Optional[TransactionOneTimeKeysCount] = None,