pub fn require_current_backup_version(
conn: &Connection,
user_id: i64,
requested_version: i64,
) -> Result<(), MatrixError>Expand description
?version= must name the caller’s CURRENT (non-deleted) backup version —
plan P9 brief: “wrong/stale version → 403 M_WRONG_ROOM_KEYS_VERSION with
current_version”. Applies uniformly to GET/PUT/DELETE
room_keys/keys[...].