export type ScryptOpts = {
    N: number;
    r: number;
    p: number;
    dkLen?: number;
    asyncTick?: number;
    maxmem?: number;
    onProgress?: (progress: number) => void;
};
/**
 * Scrypt KDF from RFC 7914.
 */
declare const _default: (password: Uint8Array, salt: Uint8Array, opts: ScryptOpts) => Promise<Uint8Array>;
export default _default;