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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import annotations
import hmac
def bytes_eq(a: bytes, b: bytes) -> bool:
if not isinstance(a, bytes) or not isinstance(b, bytes):
raise TypeError("a and b must be bytes.")
return hmac.compare_digest(a, b)