import { EventEmitter } from 'eventemitter3';
import { V2NIMProxyRequest, V2NIMProxyResponse, V2NIMProxyNotify } from '../v2_def/v2_nim_struct_def';
export declare interface V2NIMPassthroughListener {
    /** 收到透传消息 */
    onProxyNotify: [V2NIMProxyNotify];
}
export declare class V2NIMPassthroughService extends EventEmitter<V2NIMPassthroughListener> {
    instance: any;
    constructor();
    /**
     * @brief 发送 HTTP 代理请求，该请求将通过服务器透传给目标地址
     * @param request 请求参数
     * @returns Promise<V2NIMProxyResponse>
     * @example
     * ```javascript
     * const response = await v2.passthroughService.httpProxy({
     *     path: '/',
     *     method: '1',
     *     header: '{"Content-Type": "application/json"}',
     *     body: 'body'
     * })
     * ```
     */
    httpProxy(request: V2NIMProxyRequest): Promise<V2NIMProxyResponse>;
}