import { WebSocketManager } from "../utils/WebSocketManager";
export declare class NewsOperations {
    private readonly wsManager;
    constructor(wsManager: WebSocketManager);
    /**
     * Returns news from trading server which were sent within specified period of time.
     * @param {number} end - Time, 0 means current time for simplicity
     * @param {number} start - Time
     * @returns {Promise<any>} // TODO: Create INewsTopicResponse interface
     */
    getNews(end: number, start: number): Promise<any>;
}