import { HttpService } from '@nestjs/axios';
import { Observable } from 'rxjs';
import type { OAuth2ParamsInterface } from '../iam-provider.interface';
import { WellKnownService } from '../well-know.service';
import { KeycloakResponseAccessToken } from './keycloak-provider.interface';
export declare class KeycloakTokenExchangeService {
    private readonly httpService;
    private readonly wellKnownService;
    protected readonly params: OAuth2ParamsInterface;
    private timeout;
    constructor(httpService: HttpService, wellKnownService: WellKnownService, params: OAuth2ParamsInterface);
    isExternalToken(token: string): Observable<boolean>;
    exchangeInternalTokenForInternalToken(internalToken: string, audience?: string): Observable<KeycloakResponseAccessToken>;
    exchangeExternalTokenForInternalToken(externalToken: string, subjectIssuer: string, audience?: string): Observable<KeycloakResponseAccessToken>;
    exchangeInternalTokenForExternalToken(internalToken: string, requestedIssuer: string): Observable<KeycloakResponseAccessToken>;
}
//# sourceMappingURL=keycloak-token-enchange.service.d.ts.map