refactor: use registered script for proper typing (#18)

src/taskiq_deduplication/utils.py

@@ -1,18 +1,26 @@
-from collections.abc import Awaitable
-from typing import cast
-
 from redis.asyncio import Redis
+from redis.commands.core import AsyncScript
+
+RELEASE_LUA_SCRIPT = """
+if redis.call('get', KEYS[1]) == ARGV[1] then
+    return redis.call('del', KEYS[1])
+else
+    return 0
+end
+"""
 
 
 async def check_and_delete(redis: Redis, key: str, owner: str) -> bool:
-    """Delete *key* only if its value equals *owner*. Returns True if deleted."""
-    release_script = """
-    if redis.call('get', KEYS[1]) == ARGV[1] then
-        return redis.call('del', KEYS[1])
-    else
-        return 0
-    end
-    """
+    """Delete *key* only if its value equals *owner*.
 
-    released = await cast(Awaitable[int], redis.eval(release_script, 1, key, owner))
+    Args:
+        redis: Async Redis client.
+        key: Lock key to delete.
+        owner: Expected value of the key (task_id).
+
+    Returns:
+        True if the key was deleted, False otherwise.
+    """
+    script: AsyncScript = redis.register_script(RELEASE_LUA_SCRIPT)
+    released: int = await script(keys=[key], args=[owner])
     return bool(released)