import { JwtHelperService } from '@auth0/angular-jwt';
/**
 * The purpose of this very simple service is to interface between the
 * AuthService and the specific token manipulation routing of JwtHelperService.
 * In this way, if in the future we want to replace JwtHelperService by
 * another service, AuthService doesn't need to be modified, only this service.
 */
export declare class TokenService {
    private _jwt;
    constructor(_jwt: JwtHelperService);
    getToken(): string | null;
    getTokenExpirationDate(): Date | null;
    isTokenValid(): boolean;
    /**
     * Get claims from the token.
     *
     * @param claim The name of the claim
     * @param defaultValue The default value returned in case of error
     *
     * @returns claim or default value
     */
    getClaim<T, C>(claim: string, defaultValue: C): T | C;
}