From f8e7a9418a755b888ed254896bada5e45ebc0a04 Mon Sep 17 00:00:00 2001
From: Patrick Cloke <clokep@users.noreply.github.com>
Date: Mon, 1 Aug 2022 10:14:29 -0400
Subject: [PATCH] Fix missing import in `federation_event` handler. (#13431)

#13404 removed an import of `Optional` which was still needed
due to #13413 added more usages.
---
 changelog.d/13431.misc               | 1 +
 synapse/handlers/federation_event.py | 1 +
 2 files changed, 2 insertions(+)
 create mode 100644 changelog.d/13431.misc

diff --git a/changelog.d/13431.misc b/changelog.d/13431.misc
new file mode 100644
index 0000000000..655be4061b
--- /dev/null
+++ b/changelog.d/13431.misc
@@ -0,0 +1 @@
+Refactor `_resolve_state_at_missing_prevs` to compute an `EventContext` instead.
diff --git a/synapse/handlers/federation_event.py b/synapse/handlers/federation_event.py
index 612e5aaa5b..91d1439191 100644
--- a/synapse/handlers/federation_event.py
+++ b/synapse/handlers/federation_event.py
@@ -23,6 +23,7 @@ from typing import (
     Dict,
     Iterable,
     List,
+    Optional,
     Sequence,
     Set,
     Tuple,