import { IPayload } from "../interfaces";
/**
 * Collection of one line util about Jwt.
 */
export declare class Jwt {
    /**
     * Extract payload from token.
     *
     * @param token     Json Web IToken
     * @return          IPayload
     */
    static payload(token: string): IPayload;
    /**
     * Get the ttl in second.
     *
     * @param token       Json Web IToken
     * @return            Ttl
     */
    static lifeTime(token: string): number;
    /**
     * Get expiry date.
     *
     * @param token       Json Web IToken
     * @return            Ttl
     */
    static expiryDate(token: string): Date;
    /**
     * Check if token is valid + payload.data.roles includes <ROLES>
     * @param {string} token
     * @param {string} role
     * @returns {boolean}
     */
    static hasRole(token: string, role: string): boolean;
    /**
     * Check if token is defined and not expired.
     *
     * @param token       Json Web IToken
     * @return            True if everything is ok
     */
    static isValid(token: string | null | undefined): boolean;
    private static cache;
}