/**
 * indexPrices' Realtime Data
 * @namespace Streams.spot.indexPrice
 */
/**
 * Subscribe to Index Price Realtime Data
 * @async
 * @function subscribe
 * @memberof Streams.spot.indexPrice
 * @param {function} onData On Data Incomming Callback
 */
export declare function indexPriceSubscribe(onData: () => any): void;
/**
 * Unsubscribe from Index Price Realtime Data
 * @async
 * @function unsubscribe
 * @memberof Streams.spot.indexPrice
 */
export declare function indexPriceUnsubscribe(): void;
/**
 * Query the Index Prices' Data on specific market
 * @async
 * @function query
 * @memberof Streams.spot.indexPrice
 * @param {String} market Market name
 * @returns {Promise<Object>} Promise object represents the result of the request
 */
export declare function indexPriceQuery(market: string): Promise<any>;
/**
 * Query all of the Index Prices' Data
 * @async
 * @function queryAll
 * @memberof Streams.spot.indexPrice
 * @returns {Promise<Object>} Promise object represents the result of the request
 */
export declare function indexPriceQueryAll(): Promise<any>;