import { Future } from '@quenk/noni/lib/control/monad/future';
import { Context } from '../../request/context';
import { Response } from '../../response';
/**
 * Plugin allow outgoing requests and incomming responses to be intercepted.
 */
export declare abstract class Plugin<ReqBody, ResParsed> {
    /**
     * beforeRequest receives the request context before it is passed to the
     * transport.
     */
    beforeRequest(ctx: Context<ReqBody>): Future<Context<ReqBody>>;
    /**
     * afterResponse receives the response from the transport just before it
     * is returned to the caller.
     */
    afterResponse(res: Response<ResParsed>): Future<Response<ResParsed>>;
}