/**
 * Produce the canonical JSON byte string for a JWK, per RFC 7638 §3.2.
 * Members that are absent throw {@link ErrorCode.MISSING_REQUIRED_MEMBER}.
 *
 * @param {object} jwk
 * @returns {Buffer} the UTF-8 bytes to feed the digest
 */
export function canonicalise(jwk: object): Buffer;
/**
 * The lexicographically-sorted required-member set for each kty.
 * `JSON.stringify` with these keys in this order and no replacer yields
 * the canonical thumbprint input.
 */
export const REQUIRED_MEMBERS: Readonly<{
    EC: readonly string[];
    RSA: readonly string[];
    oct: readonly string[];
    OKP: readonly string[];
}>;