/// <reference types="node" />
import AEAD from '../types/AEAD';
/**
 * Encrypts a secret key via AEAD. Returns an `AEAD` object. This object is
 * stored server-side, while the encryption key is never stored. When
 * authenticating, the server returns the `AEAD` object while the client must
 * generate the encryption key on the fly from the user's password using
 * `getHKDFKeyFromPassword.ts`.
 *
 * Uses [`aes-256-gcm`](https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki).
 *
 * See `decryptSecretKey.ts`.
 */
export default function encryptSecretKey(encryptionKey: Buffer, secretKey: Buffer): AEAD;