Convert all namedtuples to attrs. (#11665)

To improve type hints throughout the code.

1 files changed, 7 insertions, 8 deletions

diff --git a/synapse/replication/tcp/streams/federation.py b/synapse/replication/tcp/streams/federation.py
index 0600cdbf36..4046bdec69 100644
--- a/synapse/replication/tcp/streams/federation.py
+++ b/synapse/replication/tcp/streams/federation.py
@@ -12,14 +12,16 @@
 # 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.
-from collections import namedtuple
 from typing import TYPE_CHECKING, Any, Awaitable, Callable, List, Tuple
 
+import attr
+
 from synapse.replication.tcp.streams._base import (
     Stream,
     current_token_without_instance,
     make_http_update_function,
 )
+from synapse.types import JsonDict
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
@@ -30,13 +32,10 @@ class FederationStream(Stream):
     sending disabled.
     """
 
-    FederationStreamRow = namedtuple(
-        "FederationStreamRow",
-        (
-            "type",  # str, the type of data as defined in the BaseFederationRows
-            "data",  # dict, serialization of a federation.send_queue.BaseFederationRow
-        ),
-    )
+    @attr.s(slots=True, frozen=True, auto_attribs=True)
+    class FederationStreamRow:
+        type: str  # the type of data as defined in the BaseFederationRows
+        data: JsonDict  # serialization of a federation.send_queue.BaseFederationRow
 
     NAME = "federation"
     ROW_TYPE = FederationStreamRow