import { Response, Request } from 'node-fetch';
import Koa, { Middleware } from 'koa';
import { Adapter, Options } from '..';
export interface FetchResult extends Response {
    koaState: any;
}
export interface DecorationOptions extends Options {
    beforeMiddleware?: Middleware[];
    afterMiddleware?: Middleware[];
    state?: any;
}
export declare class KoaAdapter implements Adapter<Koa, FetchResult, DecorationOptions> {
    private contexts;
    decorate(appOrMiddleware: Koa | Middleware, { state, beforeMiddleware, afterMiddleware, }?: Partial<DecorationOptions>): Koa<Koa.DefaultState, Koa.DefaultContext>;
    fetchResult(req: Request, resp: Response): FetchResult;
}
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