/**
 * @adonisjs/http-server
 *
 * (c) Harminder Virk <virk@adonisjs.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
import { EncryptionContract } from '@ioc:Adonis/Core/Encryption';
/**
 * Signs a value to be shared as a cookie. The signed output has a
 * hash to verify tampering with the original value
 */
export declare function pack(key: string, value: any, encryption: EncryptionContract): null | string;
/**
 * Returns a boolean, if the unpack method from this module can attempt
 * to unpack the signed value.
 */
export declare function canUnpack(signedValue: string): boolean;
/**
 * Attempts to unpack the signed value. Make sure to call `canUnpack` before
 * calling this method.
 */
export declare function unpack(key: string, signedValue: string, encryption: EncryptionContract): null | any;