import type { Bytes } from '@tendermint/types';
/**
 * sha256 encrypted, ECDSA signed version of the given byte array
 * @param bytes byte array (Uint8Array) to encrypt and sign
 * @param privateKey private key to sign with
 * @returns a sha256 encrypted, ECDSA signed version of the given byte array
 */
export declare const signBytes: (bytes: Uint8Array, privateKey: Bytes) => Uint8Array;