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diff --git a/synapse/storage/schema/main/delta/59/16federation_inbound_staging.sql b/synapse/storage/schema/main/delta/59/16federation_inbound_staging.sql
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+/* Copyright 2021 The Matrix.org Foundation C.I.C
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * 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.
+ */
+
+
+-- A staging area for newly received events over federation.
+--
+-- Note we may store the same event multiple times if it comes from different
+-- servers; this is to handle the case if we get a redacted and non-redacted
+-- versions of the event.
+CREATE TABLE federation_inbound_events_staging (
+    origin TEXT NOT NULL,
+    room_id TEXT NOT NULL,
+    event_id TEXT NOT NULL,
+    received_ts BIGINT NOT NULL,
+    event_json TEXT NOT NULL,
+    internal_metadata TEXT NOT NULL
+);
+
+CREATE INDEX federation_inbound_events_staging_room ON federation_inbound_events_staging(room_id, received_ts);
+CREATE UNIQUE INDEX federation_inbound_events_staging_instance_event ON federation_inbound_events_staging(origin, event_id);