import Koa from 'koa';
import { BotInstance } from '../BotInstance';
import { KHEventPacket } from '../types/kaiheila/packet';
import { MessageSource } from './MessageSource';
export default class WebhookSource extends MessageSource {
    type: string;
    private snMap;
    private key?;
    verifyToken?: string;
    port: number;
    httpServer?: Koa<Koa.DefaultState, Koa.DefaultContext>;
    connect: () => Promise<boolean>;
    constructor(self: BotInstance, config?: {
        key?: string;
        port: number;
        verifyToken?: string;
    });
    /**
     * 获取中间件
     * 可用于共用Koa实例。
     */
    getMiddleware(): Koa.Middleware;
    private route;
    protected onEventArrive(packet: KHEventPacket): void;
    /**
     * 解密
     * @param request 请求体
     */
    private decryptRequest;
    private verifyRequest;
    private verifySN;
    private handleChallenge;
    /**
     * 启动监听
     *
     * webhook模式下会在指定端口号启动一个http服务
     */
    listen(): Promise<true>;
}