/**
 * Generates a new keypair object from salt + password strings.
 * @param salt
 * @param key
 * @param N Scrypt parameter N. Defaults to 4096.
 * @param r Scrypt parameter r. Defaults to 16.
 * @param p Scrypt parameter p. Defaults to 1.
 * @return keyPair An object containing the public and private keys, base58 encoded.
 */
export declare const Scrypt: (salt: string, key: string, N?: number, r?: number, p?: number) => Promise<{
    pub: string;
    sec: string;
}>;