export declare type RequestHandlerOutput<ResponseType> = {
    response: ResponseType;
};
export interface RequestHandler<RequestType, ResponseType, HandlerOptions = {}> {
    /**
     * metadata contains information of a handler. For example
     * 'h2' refers this handler is for handling HTTP/2 requests,
     * whereas 'h1' refers handling HTTP1 requests
     */
    metadata?: RequestHandlerMetadata;
    destroy?: () => void;
    handle: (request: RequestType, handlerOptions?: HandlerOptions) => Promise<RequestHandlerOutput<ResponseType>>;
}
export interface RequestHandlerMetadata {
    handlerProtocol: string;
}