import { Config } from "../utils";
/**
 * getImgResponse retrieves an image, optimizes it, and returns a HTTP response
 * it returns failure responses for 404, 401 and similar cases
 * but may also throw errors if the image is not found or cannot be processed
 * or if the config options are invalid.
 * @param {Request} request - the incoming HTTP request, using the Web Fetch API's Request object
 * @param {Config} config - the config object
 * @returns {Promise<Response>} - a promise resolving to a Response object
 */
export declare function getImgResponse(request: Request, config?: Config): Promise<Response>;