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interface CloudflareSubtleCrypto extends SubtleCrypto {
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  timingSafeEqual(a: ArrayBuffer | ArrayBufferView, b: ArrayBuffer | ArrayBufferView): boolean;
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}
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export const timingSafeEqualBytes = (left: Uint8Array, right: Uint8Array): boolean => {
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  const subtle = crypto.subtle as CloudflareSubtleCrypto;
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  const lengthsMatch = left.byteLength === right.byteLength;
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  return lengthsMatch ? subtle.timingSafeEqual(left, right) : !subtle.timingSafeEqual(left, left);
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};