/**
 * Request a main event from the main process.
 * @param event - The event to request.
 * @param payload - The payload to send to the main process.
 * @returns The response from the main process.
 * @throws An error if the request fails.
 */
export declare const requestMain: <Request, Response>(event: string, ...args: Response extends void ? [payload?: Request] : [payload: Request]) => Promise<Response>;