diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 13117d70fe..d3ecebd29f 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -20,38 +20,42 @@ import itertools
import logging
import sys
-from signedjson.key import decode_verify_key_bytes
-from signedjson.sign import verify_signed_json
import six
-from six.moves import http_client
from six import iteritems
-from twisted.internet import defer
+from six.moves import http_client
+
+from signedjson.key import decode_verify_key_bytes
+from signedjson.sign import verify_signed_json
from unpaddedbase64 import decode_base64
-from ._base import BaseHandler
+from twisted.internet import defer
+from synapse.api.constants import EventTypes, Membership, RejectedReason
from synapse.api.errors import (
- AuthError, FederationError, StoreError, CodeMessageException, SynapseError,
+ AuthError,
+ CodeMessageException,
FederationDeniedError,
+ FederationError,
+ StoreError,
+ SynapseError,
)
-from synapse.api.constants import EventTypes, Membership, RejectedReason
-from synapse.events.validator import EventValidator
-from synapse.util import unwrapFirstError, logcontext
-from synapse.util.metrics import measure_func
-from synapse.util.logutils import log_function
-from synapse.util.async import Linearizer
-from synapse.util.frozenutils import unfreeze
from synapse.crypto.event_signing import (
- compute_event_signature, add_hashes_and_signatures,
+ add_hashes_and_signatures,
+ compute_event_signature,
)
+from synapse.events.utils import prune_event
+from synapse.events.validator import EventValidator
from synapse.state import resolve_events_with_factory
from synapse.types import UserID, get_domain_from_id
-
-from synapse.events.utils import prune_event
-
+from synapse.util import logcontext, unwrapFirstError
+from synapse.util.async import Linearizer
+from synapse.util.distributor import user_joined_room
+from synapse.util.frozenutils import unfreeze
+from synapse.util.logutils import log_function
+from synapse.util.metrics import measure_func
from synapse.util.retryutils import NotRetryingDestination
-from synapse.util.distributor import user_joined_room
+from ._base import BaseHandler
logger = logging.getLogger(__name__)
|
