import { Observable } from 'rxjs';
import { RefreshTokensResponseInterface } from '../interfaces/refresh-tokens-response.interface';
import { InjectionToken } from '@angular/core';
import { RefreshEndpointConfigInterface } from '../interfaces/refresh-endpoint-config.interface';
import { JwtUserService } from '../services/jwt-user.service';
import { SessionService } from '../services/session.service';
import { HttpClient } from '@angular/common/http';
import * as i0 from "@angular/core";
export declare const REFRESH_ENDPOINT_CONFIG: InjectionToken<RefreshEndpointConfigInterface>;
export declare class TokenRefreshService {
    private http;
    private sessionService;
    private user;
    private refreshEndpointConfig;
    expirationTimerActive: boolean;
    refreshPending: boolean;
    private cachedTokens;
    constructor(http: HttpClient, sessionService: SessionService, user: JwtUserService, refreshEndpointConfig: RefreshEndpointConfigInterface);
    getRefreshTokens(): Observable<RefreshTokensResponseInterface>;
    setCachedTokens(tokens: RefreshTokensResponseInterface): void;
    getCashedTokens(): Observable<RefreshTokensResponseInterface>;
    clearCachedTokens(): void;
    startCachedTokensExpirationTimer(expirationTimeSeconds: number): void;
    private refreshTokens;
    static ɵfac: i0.ɵɵFactoryDeclaration<TokenRefreshService, [null, null, null, { optional: true; }]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TokenRefreshService>;
}