diff --git a/synapse/rest/client/devices.py b/synapse/rest/client/devices.py
index 8f3cbd4ea2..69b803f9f8 100644
--- a/synapse/rest/client/devices.py
+++ b/synapse/rest/client/devices.py
@@ -20,6 +20,7 @@ from pydantic import Extra, StrictStr
from synapse.api import errors
from synapse.api.errors import NotFoundError
+from synapse.handlers.device import DeviceHandler
from synapse.http.server import HttpServer
from synapse.http.servlet import (
RestServlet,
@@ -80,7 +81,9 @@ class DeleteDevicesRestServlet(RestServlet):
super().__init__()
self.hs = hs
self.auth = hs.get_auth()
- self.device_handler = hs.get_device_handler()
+ handler = hs.get_device_handler()
+ assert isinstance(handler, DeviceHandler)
+ self.device_handler = handler
self.auth_handler = hs.get_auth_handler()
class PostBody(RequestBodyModel):
@@ -125,7 +128,9 @@ class DeviceRestServlet(RestServlet):
super().__init__()
self.hs = hs
self.auth = hs.get_auth()
- self.device_handler = hs.get_device_handler()
+ handler = hs.get_device_handler()
+ assert isinstance(handler, DeviceHandler)
+ self.device_handler = handler
self.auth_handler = hs.get_auth_handler()
self._msc3852_enabled = hs.config.experimental.msc3852_enabled
@@ -256,7 +261,9 @@ class DehydratedDeviceServlet(RestServlet):
super().__init__()
self.hs = hs
self.auth = hs.get_auth()
- self.device_handler = hs.get_device_handler()
+ handler = hs.get_device_handler()
+ assert isinstance(handler, DeviceHandler)
+ self.device_handler = handler
async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
requester = await self.auth.get_user_by_req(request)
@@ -313,7 +320,9 @@ class ClaimDehydratedDeviceServlet(RestServlet):
super().__init__()
self.hs = hs
self.auth = hs.get_auth()
- self.device_handler = hs.get_device_handler()
+ handler = hs.get_device_handler()
+ assert isinstance(handler, DeviceHandler)
+ self.device_handler = handler
class PostBody(RequestBodyModel):
device_id: StrictStr
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