tardis-dev/dist/realtimefeeds/delta.js

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

import { RealTimeFeedBase } from "./realtimefeed.js";
export class DeltaRealTimeFeed extends RealTimeFeedBase {
    wssURL = 'wss://socket.delta.exchange';
    mapToSubscribeMessages(filters) {
        return filters.map((filter) => {
            return {
                type: 'subscribe',
                payload: {
                    channels: [
                        {
                            name: filter.channel,
                            symbols: filter.symbols !== undefined && filter.channel === 'mark_price' ? filter.symbols.map((s) => `MARK:${s}`) : filter.symbols
                        }
                    ]
                }
            };
        });
    }
    messageIsError(message) {
        return message.error !== undefined && message.error !== null;
    }
    sendCustomPing = () => {
        this.send({ type: 'ping' });
    };
    messageIsHeartbeat(msg) {
        return msg.type === 'pong';
    }
}
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