import { CdkCustomResourceEvent as OnEventRequest, CdkCustomResourceResponse as OnEventResponse } from "aws-lambda";
/**
 * The onEvent handler is invoked whenever a resource lifecycle event for a credentials custom-resource occurs
 *
 * @see https://docs.aws.amazon.com/cdk/api/v1/docs/custom-resources-readme.html#handling-lifecycle-events-onevent
 */
export declare function handler(event: OnEventRequest): Promise<OnEventResponse | undefined>;