import type { ObservationClient } from './client.js';
/**
 * @internal
 * Interceptor that automatically refreshes access tokens when a 401 error occurs.
 */
export declare class RefreshTokenInterceptor {
    private client;
    private isRefreshing;
    private refreshPromise;
    private readonly maxRetries;
    private failedQueue;
    constructor(client: ObservationClient);
    /**
     * Creates the response error handler for automatic token refresh.
     */
    createResponseErrorHandler(): (error: unknown) => Promise<unknown>;
    /**
     * Process all queued requests after token refresh
     */
    private processQueue;
    /**
     * Retries the original request with the new access token.
     */
    private retryOriginalRequest;
}