import { Observable } from 'rxjs';
import { AuthChallenge, AuthTokenPair, RefreshTokenRequest, VerifySignatureRequest } from './models/auth-api.model';
/**
 * Thin HTTP client for the Ed25519 admin auth endpoints. These endpoints may
 * not exist on every backend yet - calling them before the backend ships
 * 404s or connection-errors, which AuthService maps to the
 * `backend-unavailable` error screen. No mock/fake responses are fabricated
 * here; this is real HttpClient wiring against the real contract.
 */
export declare class AuthApiService {
    private readonly http;
    private readonly baseUrl;
    requestChallenge(): Observable<AuthChallenge>;
    verifySignature(request: VerifySignatureRequest): Observable<AuthTokenPair>;
    refresh(request: RefreshTokenRequest): Observable<AuthTokenPair>;
    logout(refreshToken: string): Observable<void>;
}