import { WsChannel } from './type/meta';
export type WsKey = 'private' | 'public' | 'business';
export declare const WS_BASE_URL: {
    readonly prod: "wss://ws.okx.com:8443/ws/v5/";
    readonly aws: "wss://wsaws.okx.com:8443/ws/v5/";
    readonly demo: "wss://wspap.okx.com:8443/ws/v5/";
};
export type WsMarket = keyof typeof WS_BASE_URL;
export declare const getWsUrl: (market: WsMarket, key: WsKey) => string;
/** Used to automatically determine if a sub request should be to the public or private ws (when there's two) */
export declare const PRIVATE_CHANNELS: string[];
/**
 * The following channels only support the new business wss endpoint:
 * https://www.okx.com/help-center/changes-to-v5-api-websocket-subscription-parameter-and-url
 */
export declare const BUSINESS_CHANNELS: string[];
/**
 * Get ws key for a certain channel
 * @param channel Get ws key for a certain channel
 * @returns {WsKey}
 */
export declare const getWsKeyForTopicChannel: (channel: WsChannel) => WsKey;
/**
 * deep match 2 objects
 * @param object1 {object}
 * @param object2 {object}
 * @returns whether the 2 object is deeply match or not
 */
export declare function deepObjectMatch(object1: object, object2: object): boolean;
/**
 * find deep matched object in iterator, return the object if found, otherwise return undefined.
 * @param arr iterator
 * @param obj object
 * @returns deep matched object in the iterator
 */
export declare const deepObjectMatchInArr: (arr: Iterable<object>, obj: object) => object | undefined;