/**
 * @param {Uint8Array} rpIdHash             32-byte hash from authData
 * @param {string | string[]} expectedRpId  one RP ID or an ordered list
 * @returns {{ matched: string } | null}   the RP ID that matched, or null
 */
export function matchRpId(rpIdHash: Uint8Array, expectedRpId: string | string[]): {
    matched: string;
} | null;