import type { ConfigManager } from "./config-manager.js";
import type { OAuthClient } from "./oauth-client.js";
export declare class TokenExpiredError extends Error {
    constructor(message: string);
}
export declare class TokenRefreshMiddleware {
    private configManager;
    private oauthClient;
    private pendingRefresh;
    constructor(configManager: ConfigManager, oauthClient: OAuthClient);
    getValidAccessToken(): Promise<string>;
    private refreshToken;
}