/**
 * Utility function to encode a string or Uint8Array as a base64url string.
 *
 * @param input Value that will be base64url-encoded.
 */
interface Base64UrlEncode {
    (input: Uint8Array | string): string;
}
/**
 * Utility function to decode a base64url encoded string.
 *
 * @param input Value that will be base64url-decoded.
 */
interface Base64UrlDecode {
    (input: Uint8Array | string): Uint8Array;
}
export declare const encode: Base64UrlEncode;
export declare const decode: Base64UrlDecode;
export {};