/**
 * Subscribe to Market Depth Realtime Data
 * @async
 * @function subscribe
 * @memberof Streams.futures.depth
 * @param {Array<Object>|Object} markets Market(s) Name ( Would subscribe on one or multi market(s) depending on the parameter)
 * @param {function} onData On Data Incomming Callback
 */
export declare function futuresDepthSubscribe(markets: {
    market: string;
    limit: string;
    interval: string;
    diff: string;
}[] | {
    market: string;
    limit: string;
    interval: string;
    diff: string;
}, onData: () => any): void;
/**
 * Unsubscribe from Market Depth Realtime Data
 * @async
 * @function unsubscribe
 * @memberof Streams.futures.depth
 */
export declare function futuresDepthUnsubscribe(): void;
/**
 * Unsubscribe from Multi-Market Depth Realtime Data
 * @async
 * @function unsubscribeMulti
 * @memberof Streams.futures.depth
 */
export declare function futuresDepthUnsubscribeMulti(): void;
/**
 * Query the Market Depth' Data on specific market
 * @async
 * @function query
 * @memberof Streams.futures.depth
 * @param {String} market Market name
 * @param {5|10|20|50|100} limit Number of records obtained
 * @param {"10"|"1"|"0"|"0.1"|"0.01"} interval Market depth aggregation level
 * @returns {Promise<Object>} Promise object represents the result of the request
 */
export declare function query(market: string, limit: 5 | 10 | 20 | 50 | 100, interval: "0.01" | "0.1" | "0" | "1" | "10"): Promise<any>;