Watch Vs Fetch

// see this issue for details
// https://github.com/ccxt/ccxt/issues/6659


'use strict';

import ccxt from '../../js/ccxt.js';

console.log ('CCXT Version:', ccxt.version); // eslint-disable-line import/no-named-as-default-member

const exchange = new ccxt.pro.kraken (); // eslint-disable-line import/no-named-as-default-member

function yellow (s) {
    return '\x1b[33m' + s + '\x1b[0m';
}

async function runWs () {
    while (true) { // eslint-disable-line no-constant-condition
        const book = await exchange.watchOrderBook ('ETH/BTC');
        console.log (new Date (), 'WS  ', book['datetime'], book['bids'][0][0], book['asks'][0][0]);
    }
}

async function runRest () {
    while (true) { // eslint-disable-line no-constant-condition
        const book = await exchange.fetchOrderBook ('ETH/BTC');
        const timestamp = new Date (exchange.last_response_headers['Date']).getTime ();
        const datetime = exchange.iso8601 (timestamp);
        console.log (new Date (), 'REST', yellow (datetime), book['bids'][0][0], book['asks'][0][0]);
    }
}

runWs ();
runRest ();