import { PreAuthorizeMiddleware, Middleware } from "./middleware";
/**
 * Built-in middleware to handle url_verification requests.
 * @param req request
 * @returns response if needed
 */
export declare const urlVerification: PreAuthorizeMiddleware;
/**
 * Built-in middleware bypass self-generated events for preventing an infinite loop of self-responses.
 * @param req request
 * @returns response if needed
 */
export declare function ignoringSelfEvents(ignoreSelfAssistantMessageEvents: boolean): Middleware;
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