import type { OrderBook } from '../../types';
import { BaseWebSocket } from '../base.ws';
import type { OKXExchange } from './okx.exchange';
type Data = Record<string, any>;
type MessageHandlers = {
    [channel: string]: (json: Data) => void;
};
type SubscribedTopics = {
    [id: string]: Array<{
        channel: string;
        instId: string;
    }>;
};
export declare class OKXPublicWebsocket extends BaseWebSocket<OKXExchange> {
    topics: SubscribedTopics;
    messageHandlers: MessageHandlers;
    connectAndSubscribe: () => void;
    onOpen: () => void;
    ping: () => void;
    subscribe: () => void;
    onMessage: ({ data }: MessageEvent) => void;
    handlePongEvent: () => void;
    handleTickerEvents: ({ data: [update] }: Data) => void;
    handleMarkPriceEvents: ({ data: [update] }: Data) => void;
    handleIndexTickerEvents: ({ data: [update] }: Data) => void;
    handleOpenInterestEvents: ({ data: [update] }: Data) => void;
    handleFundingRateEvents: ({ data: [update] }: Data) => void;
    listenOrderBook: (symbol: string, callback: (orderBook: OrderBook) => void) => () => void;
}
export {};