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-rw-r--r--synapse/replication/slave/storage/devices.py8
-rw-r--r--synapse/replication/tcp/streams/__init__.py1
-rw-r--r--synapse/replication/tcp/streams/_base.py18
-rw-r--r--synapse/storage/data_stores/main/devices.py13
-rw-r--r--synapse/storage/data_stores/main/end_to_end_keys.py24
5 files changed, 50 insertions, 14 deletions
diff --git a/synapse/replication/slave/storage/devices.py b/synapse/replication/slave/storage/devices.py
index c9f99a8405..f416d73b2e 100644
--- a/synapse/replication/slave/storage/devices.py
+++ b/synapse/replication/slave/storage/devices.py
@@ -42,7 +42,9 @@ class SlavedDeviceStore(EndToEndKeyWorkerStore, DeviceWorkerStore, BaseSlavedSto
 
     def stream_positions(self):
         result = super(SlavedDeviceStore, self).stream_positions()
-        result["device_lists"] = self._device_list_id_gen.get_current_token()
+        result["user_signature"] = result[
+            "device_lists"
+        ] = self._device_list_id_gen.get_current_token()
         return result
 
     def process_replication_rows(self, stream_name, token, rows):
@@ -50,13 +52,15 @@ class SlavedDeviceStore(EndToEndKeyWorkerStore, DeviceWorkerStore, BaseSlavedSto
             self._device_list_id_gen.advance(token)
             for row in rows:
                 self._invalidate_caches_for_devices(token, row.user_id, row.destination)
+        elif stream_name == "user_signature":
+            for row in rows:
+                self._user_signature_stream_cache.entity_has_changed(row.user_id, token)
         return super(SlavedDeviceStore, self).process_replication_rows(
             stream_name, token, rows
         )
 
     def _invalidate_caches_for_devices(self, token, user_id, destination):
         self._device_list_stream_cache.entity_has_changed(user_id, token)
-        self._user_signature_stream_cache.entity_has_changed(user_id, token)
 
         if destination:
             self._device_list_federation_stream_cache.entity_has_changed(
diff --git a/synapse/replication/tcp/streams/__init__.py b/synapse/replication/tcp/streams/__init__.py
index 634f636dc9..5f52264e84 100644
--- a/synapse/replication/tcp/streams/__init__.py
+++ b/synapse/replication/tcp/streams/__init__.py
@@ -45,5 +45,6 @@ STREAMS_MAP = {
         _base.TagAccountDataStream,
         _base.AccountDataStream,
         _base.GroupServerStream,
+        _base.UserSignatureStream,
     )
 }
diff --git a/synapse/replication/tcp/streams/_base.py b/synapse/replication/tcp/streams/_base.py
index f03111c259..9e45429d49 100644
--- a/synapse/replication/tcp/streams/_base.py
+++ b/synapse/replication/tcp/streams/_base.py
@@ -95,6 +95,7 @@ GroupsStreamRow = namedtuple(
     "GroupsStreamRow",
     ("group_id", "user_id", "type", "content"),  # str  # str  # str  # dict
 )
+UserSignatureStreamRow = namedtuple("UserSignatureStreamRow", ("user_id"))  # str
 
 
 class Stream(object):
@@ -438,3 +439,20 @@ class GroupServerStream(Stream):
         self.update_function = store.get_all_groups_changes
 
         super(GroupServerStream, self).__init__(hs)
+
+
+class UserSignatureStream(Stream):
+    """A user has signed their own device with their user-signing key
+    """
+
+    NAME = "user_signature"
+    _LIMITED = False
+    ROW_TYPE = UserSignatureStreamRow
+
+    def __init__(self, hs):
+        store = hs.get_datastore()
+
+        self.current_token = store.get_device_stream_token
+        self.update_function = store.get_all_user_signature_changes_for_remotes
+
+        super(UserSignatureStream, self).__init__(hs)
diff --git a/synapse/storage/data_stores/main/devices.py b/synapse/storage/data_stores/main/devices.py
index a96f09ea7b..f7a3542348 100644
--- a/synapse/storage/data_stores/main/devices.py
+++ b/synapse/storage/data_stores/main/devices.py
@@ -543,20 +543,9 @@ class DeviceWorkerStore(SQLBaseStore):
             LEFT JOIN device_lists_outbound_pokes USING (stream_id, user_id, device_id)
             WHERE ? < stream_id AND stream_id <= ?
             GROUP BY user_id, destination
-            UNION
-            SELECT MAX(stream_id) AS stream_id, from_user_id AS user_id, NULL AS destination
-            FROM user_signature_stream
-            WHERE ? < stream_id AND stream_id <= ?
-            GROUP BY user_id
         """
         return self._execute(
-            "get_all_device_list_changes_for_remotes",
-            None,
-            sql,
-            from_key,
-            to_key,
-            from_key,
-            to_key,
+            "get_all_device_list_changes_for_remotes", None, sql, from_key, to_key
         )
 
     @cached(max_entries=10000)
diff --git a/synapse/storage/data_stores/main/end_to_end_keys.py b/synapse/storage/data_stores/main/end_to_end_keys.py
index a0bc6f2d18..073412a78d 100644
--- a/synapse/storage/data_stores/main/end_to_end_keys.py
+++ b/synapse/storage/data_stores/main/end_to_end_keys.py
@@ -315,6 +315,30 @@ class EndToEndKeyWorkerStore(SQLBaseStore):
             from_user_id,
         )
 
+    def get_all_user_signature_changes_for_remotes(self, from_key, to_key):
+        """Return a list of changes from the user signature stream to notify remotes.
+        Note that the user signature stream represents when a user signs their
+        device with their user-signing key, which is not published to other
+        users or servers, so no `destination` is needed in the returned
+        list. However, this is needed to poke workers.
+
+        Args:
+            from_key (int): the stream ID to start at (exclusive)
+            to_key (int): the stream ID to end at (inclusive)
+
+        Returns:
+            Deferred[list[(int,str)]] a list of `(stream_id, user_id)`
+        """
+        sql = """
+            SELECT MAX(stream_id) AS stream_id, from_user_id AS user_id
+            FROM user_signature_stream
+            WHERE ? < stream_id AND stream_id <= ?
+            GROUP BY user_id
+        """
+        return self._execute(
+            "get_all_user_signature_changes_for_remotes", None, sql, from_key, to_key
+        )
+
 
 class EndToEndKeyStore(EndToEndKeyWorkerStore, SQLBaseStore):
     def set_e2e_device_keys(self, user_id, device_id, time_now, device_keys):