import { Ipurchase } from '.';
export declare function validatePurchaseData(data: Ipurchase): string | null;
export declare function encrypt(value: string): string;
export declare function decrypt(value: string): string;
export declare function setCookie(name: string, value: string, hours: number): void;
export declare function getCookie(name: string): string | null;
export declare function deleteCookies(...names: string[]): void;