import { JwtClaims } from './models/auth-api.model';
/**
 * Client-side JWT *decoding* only - never verification. The signature is
 * meaningless to check here because the frontend has no trusted key to check
 * it against; verifying a JWT's signature is the backend's job on every
 * request. This service exists purely so the UI can read `role`/`exp` for
 * display and route-gating UX (e.g. "session expires in 4m").
 */
export declare class JwtService {
    decode(token: string): JwtClaims | null;
    isExpired(claims: JwtClaims, skewSeconds?: number): boolean;
    private isJwtClaims;
    private base64UrlDecode;
}