From 195abfe7a5ec3b0d52812a3d7a04264f97376771 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Fri, 27 Oct 2017 09:58:13 +0100
Subject: [PATCH] Remove incorrect attestations

---
 synapse/groups/attestations.py  |  1 +
 synapse/storage/group_server.py | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/synapse/groups/attestations.py b/synapse/groups/attestations.py
index 2e252b66a7..0bd73b6a61 100644
--- a/synapse/groups/attestations.py
+++ b/synapse/groups/attestations.py
@@ -139,6 +139,7 @@ class GroupAttestionRenewer(object):
                     "Incorrectly trying to do attestations for user: %r in %r",
                     user_id, group_id,
                 )
+                yield self.store.remove_attestation_renewal(group_id, user_id)
                 return
 
             yield self.transport_client.renew_group_attestation(
diff --git a/synapse/storage/group_server.py b/synapse/storage/group_server.py
index 9e63db5c6c..ed2ee61ad2 100644
--- a/synapse/storage/group_server.py
+++ b/synapse/storage/group_server.py
@@ -1086,6 +1086,24 @@ class GroupServerStore(SQLBaseStore):
             desc="update_remote_attestion",
         )
 
+    def remove_attestation_renewal(self, group_id, user_id):
+        """Remove an attestation that we thought we should renew, but actually
+        shouldn't. Ideally this would never get called as we would never
+        incorrectly try and do attestations for local users on local groups.
+
+        Args:
+            group_id (str)
+            user_id (str)
+        """
+        return self._simple_update_one(
+            table="_simple_delete",
+            keyvalues={
+                "group_id": group_id,
+                "user_id": user_id,
+            },
+            desc="remove_attestation_renewal",
+        )
+
     @defer.inlineCallbacks
     def get_remote_attestation(self, group_id, user_id):
         """Get the attestation that proves the remote agrees that the user is