tardis-dev/dist/realtimefeeds/binanceeuropeanoptions.js

Convenient access to tick-level historical and real-time cryptocurrency market data via Node.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.BinanceEuropeanOptionsRealTimeFeed = void 0;
const handy_1 = require("../handy");
const realtimefeed_1 = require("./realtimefeed");
class BinanceEuropeanOptionsRealTimeFeed extends realtimefeed_1.RealTimeFeedBase {
    constructor() {
        super(...arguments);
        this.wssURL = 'wss://nbstream.binance.com/eoptions/stream';
    }
    mapToSubscribeMessages(filters) {
        const payload = filters.map((filter, index) => {
            if (!filter.symbols || filter.symbols.length === 0) {
                throw new Error('BinanceEuropeanOptionsRealTimeFeed requires explicitly specified symbols when subscribing to live feed');
            }
            return {
                method: 'SUBSCRIBE',
                params: filter.symbols.map((symbol) => {
                    if (filter.channel === 'depth100') {
                        return `${symbol}@${filter.channel}@100ms`;
                    }
                    if (filter.channel === 'openInterest') {
                        const matchingTickerChannel = filters.find((f) => f.channel === 'ticker');
                        if (matchingTickerChannel !== undefined && matchingTickerChannel.symbols !== undefined) {
                            const expirations = matchingTickerChannel.symbols
                                .map((s) => {
                                const symbolParts = s.split('-');
                                return `${symbolParts[1]}`;
                            })
                                .filter(handy_1.onlyUnique);
                            return `${symbol}@${filter.channel}@${expirations}`;
                        }
                    }
                    return `${symbol}@${filter.channel}`;
                }),
                id: index + 1
            };
        });
        return payload;
    }
    messageIsError(message) {
        if (message.data !== undefined && message.data.e === 'error') {
            return true;
        }
        return false;
    }
}
exports.BinanceEuropeanOptionsRealTimeFeed = BinanceEuropeanOptionsRealTimeFeed;
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