tardis-dev/dist/realtimefeeds/coinbaseinternational.js

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

import crypto from 'crypto';
import { RealTimeFeedBase } from "./realtimefeed.js";
export class CoinbaseInternationalRealTimeFeed extends RealTimeFeedBase {
    _hasCredentials = process.env.COINBASE_INTERNATIONAL_API_KEY !== undefined &&
        process.env.COINBASE_INTERNATIONAL_API_SECRET !== undefined &&
        process.env.COINBASE_INTERNATIONAL_API_PASSPHRASE !== undefined;
    get wssURL() {
        return 'wss://ws-md.international.coinbase.com';
    }
    mapToSubscribeMessages(filters) {
        if (this._hasCredentials == false) {
            throw new Error('CoinbaseInternationalRealTimeFeed requires auth credentials env vars set(COINBASE_INTERNATIONAL_API_KEY, COINBASE_INTERNATIONAL_API_SECRET, COINBASE_INTERNATIONAL_API_PASSPHRASE)');
        }
        const authParams = this.getAuthParams();
        return filters.map((filter) => {
            if (!filter.symbols || filter.symbols.length === 0) {
                throw new Error('CoinbaseInternationalRealTimeFeed requires explicitly specified symbols when subscribing to live feed');
            }
            return {
                type: 'SUBSCRIBE',
                product_ids: filter.symbols,
                channels: [filter.channel],
                signature: authParams.signature,
                key: authParams.key,
                time: authParams.time,
                passphrase: authParams.passphrase
            };
        });
    }
    getAuthParams() {
        const time = Math.floor(Date.now().valueOf() / 1000);
        const apiSecret = process.env.COINBASE_INTERNATIONAL_API_SECRET;
        const message = `${time}${process.env.COINBASE_INTERNATIONAL_API_KEY}CBINTLMD${process.env.COINBASE_INTERNATIONAL_API_PASSPHRASE}`;
        const hmac = crypto.createHmac('sha256', Buffer.from(apiSecret, 'base64'));
        const signature = hmac.update(message).digest('base64');
        return {
            signature,
            key: process.env.COINBASE_INTERNATIONAL_API_KEY,
            passphrase: process.env.COINBASE_INTERNATIONAL_API_PASSPHRASE,
            time
        };
    }
    messageIsError(message) {
        return message.type === 'REJECT';
    }
}
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