Rename `get_e2e_device_keys` to better reflect its purpose (#8205)

... and to show that it does something slightly different to
`_get_e2e_device_keys_txn`.

`include_all_devices` and `include_deleted_devices` were never used (and
`include_deleted_devices` was broken, since that would cause `None`s in the
result which were not handled in the loop below.

Add some typing too.

1 files changed, 6 insertions, 14 deletions

diff --git a/synapse/storage/databases/main/end_to_end_keys.py b/synapse/storage/databases/main/end_to_end_keys.py
index af0b85e2c9..50ecddf7fa 100644
--- a/synapse/storage/databases/main/end_to_end_keys.py
+++ b/synapse/storage/databases/main/end_to_end_keys.py
@@ -23,6 +23,7 @@ from twisted.enterprise.adbapi import Connection
 from synapse.logging.opentracing import log_kv, set_tag, trace
 from synapse.storage._base import SQLBaseStore, db_to_json
 from synapse.storage.database import make_in_list_sql_clause
+from synapse.types import JsonDict
 from synapse.util import json_encoder
 from synapse.util.caches.descriptors import cached, cachedList
 from synapse.util.iterutils import batch_iter
@@ -33,17 +34,12 @@ if TYPE_CHECKING:
 
 class EndToEndKeyWorkerStore(SQLBaseStore):
     @trace
-    async def get_e2e_device_keys(
-        self, query_list, include_all_devices=False, include_deleted_devices=False
-    ):
-        """Fetch a list of device keys.
+    async def get_e2e_device_keys_for_cs_api(
+        self, query_list: List[Tuple[str, Optional[str]]]
+    ) -> Dict[str, Dict[str, JsonDict]]:
+        """Fetch a list of device keys, formatted suitably for the C/S API.
         Args:
             query_list(list): List of pairs of user_ids and device_ids.
-            include_all_devices (bool): whether to include entries for devices
-                that don't have device keys
-            include_deleted_devices (bool): whether to include null entries for
-                devices which no longer exist (but were in the query_list).
-                This option only takes effect if include_all_devices is true.
         Returns:
             Dict mapping from user-id to dict mapping from device_id to
             key data.  The key data will be a dict in the same format as the
@@ -54,11 +50,7 @@ class EndToEndKeyWorkerStore(SQLBaseStore):
             return {}
 
         results = await self.db_pool.runInteraction(
-            "get_e2e_device_keys",
-            self._get_e2e_device_keys_txn,
-            query_list,
-            include_all_devices,
-            include_deleted_devices,
+            "get_e2e_device_keys", self._get_e2e_device_keys_txn, query_list,
         )
 
         # Build the result structure, un-jsonify the results, and add the