Gateio Watch Order Book

'use strict';

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

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

const orderbooks = {};

async function watchAllSymbols (exchange, symbols) {
    while (true) { // eslint-disable-line no-constant-condition
        const keys = Object.keys (orderbooks);
        if (symbols.length === keys.length) {
            console.log ('\n\n\n\n\n');
            console.log ('----------------------------------------------------');
            console.log ('All orderbooks received at least one update:');
            for (let i = 0; i < symbols.length; i++) {
                const symbol = symbols[i];
                const orderbook = orderbooks[symbol];
                console.log (exchange.iso8601 (exchange.milliseconds ()), orderbook['datetime'], orderbook['nonce'], symbol, orderbook['asks'][0], orderbook['bids'][0]);
            }
            console.log ('----------------------------------------------------');
            console.log ('\n\n\n\n\n');
            // process.exit () // stop here if you want
            break;
        } else {
            await exchange.sleep (1000);
        }
    }
}

async function watchOrderBook (exchange, symbol) {
    while (true) { // eslint-disable-line no-constant-condition
        try {
            const orderbook = await exchange.watchOrderBook (symbol);
            orderbooks[symbol] = orderbook;
            console.log (exchange.iso8601 (exchange.milliseconds ()), orderbook['datetime'], orderbook['nonce'], symbol, orderbook['asks'][0], orderbook['bids'][0]);
        } catch (e) {
            console.log (e);
        }
    }
}

async function main () {
    const exchange = new ccxt.pro.gate ({ // eslint-disable-line import/no-named-as-default-member
        'options': {
            'defaultType': 'swap',
        },
    });
    await exchange.loadMarkets ();
    // exchange.verbose = true // uncomment for debugging purposes if necessary
    const symbols = [
        // 'SOS/USDT:USDT',
        // 'JASMY/USDT:USDT',
        // 'SLP/USDT:USDT',
        'ACH/USDT:USDT',
        'MKISHU/USDT:USDT',
        // 'GMT/USDT:USDT',
        // 'ASTR/USDT:USDT',
        'RAMP/USDT:USDT',
        'RSR/USDT:USDT',
        // 'RACA/USDT:USDT',
        // 'ROOK/USDT:USDT',
        // 'ROSE/USDT:USDT',
    ];
    await Promise.all ([
        watchAllSymbols (exchange, symbols),
        ...symbols.map ((symbol) => watchOrderBook (exchange, symbol)),
    ]);
}

main ();