/// <reference types="koa__router" />
import { StateBag } from './state-bag.js';
import { RouterContext } from '@koa/router';
import { InteractsWithState as InteractsWithStateContract, HttpStateData } from '@supercharge/contracts';
export declare class InteractsWithState implements InteractsWithStateContract {
    /**
     * The route context object from Koa.
     */
    protected readonly koaCtx: RouterContext;
    /**
     * Create a new instance.
     */
    constructor(ctx: RouterContext);
    /**
     * Returns the shared state bag for this HTTP context.
     */
    state(): StateBag;
    /**
     * Share a given `state` across HTTP requests. Any previously
     * set state will be merged with the given `state`.
     */
    share<Key extends keyof HttpStateData>(key: Key, value: HttpStateData[Key]): this;
    share(values: Partial<HttpStateData>): this;
}