/**
 * Byte-array helpers shared across attestation formats.
 *
 * `bytesEqual` is constant-time in the sense that it doesn't
 * short-circuit past the length check — every equal-length input
 * runs through the full XOR loop. WebAuthn attestations are not
 * timing-sensitive (they compare public material), but keeping the
 * comparator branchless avoids the whole class of "was this constant-
 * time?" review questions.
 *
 * `concat` is the trivial many-input Uint8Array joiner that every
 * attestation verifier hand-rolled.
 */
/**
 * @param {Uint8Array} a
 * @param {Uint8Array} b
 * @returns {boolean}
 */
export function bytesEqual(a: Uint8Array, b: Uint8Array): boolean;
/**
 * @param {...Uint8Array} chunks
 * @returns {Uint8Array}
 */
export function concat(...chunks: Uint8Array[]): Uint8Array;