tardis-dev/dist/realtimefeeds/cryptofacilities.js

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

import { RealTimeFeedBase } from "./realtimefeed.js";
export class CryptofacilitiesRealTimeFeed extends RealTimeFeedBase {
    wssURL = 'wss://futures.kraken.com/ws/v1';
    mapToSubscribeMessages(filters) {
        return filters
            .filter((filter) => filter.channel.endsWith('_snapshot') === false)
            .map((filter) => {
            if (!filter.symbols || filter.symbols.length === 0) {
                throw new Error('CryptofacilitiesRealTimeFeed requires explicitly specified symbols when subscribing to live feed');
            }
            return {
                event: 'subscribe',
                product_ids: filter.symbols,
                feed: filter.channel
            };
        });
    }
    messageIsError(message) {
        return message.event === 'error';
    }
    messageIsHeartbeat(message) {
        return message.feed === 'heartbeat';
    }
}
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