import { RequestListener } from "http";
import { HapiListener } from "./handlers/hapiListener";
import * as apigw from "./types";
declare namespace handler {
    type APIGatewayEvent = apigw.APIGatewayEvent;
    type APIGatewayResponse = apigw.LambdaResponse;
    type LambdaResponse = apigw.LambdaResponse;
    type LambdaContext = apigw.LambdaContext;
    type APIGatewayEventHandler = (event: handler.APIGatewayEvent, context?: handler.LambdaContext) => Promise<handler.LambdaResponse>;
}
type PromiseFactory<A> = () => Promise<A>;
interface Options {
    beforeDispatch?: (r: apigw.APIGatewayEvent) => Promise<apigw.APIGatewayEvent>;
    beforeReturn?: (r: apigw.LambdaResponse) => Promise<apigw.LambdaResponse>;
    onError?: (e: Error) => Promise<void>;
}
declare const handler: {
    (app: RequestListener, options?: Options): handler.APIGatewayEventHandler;
    deferred: (appFn: PromiseFactory<RequestListener>, options?: Options) => handler.APIGatewayEventHandler;
    HapiListener: typeof HapiListener;
    nestHandler: (nestApp: any) => Promise<any>;
    fastifyHandler: (fastifyBuilder: (options: object) => any) => (options: object) => Promise<RequestListener>;
    fastifyV4Handler: (app: any) => Promise<unknown>;
};
export = handler;