const signalR = require('node-signalr');
let client = new signalR.client('
https://api.crex24.com/signalr', ['publicCryptoHub']);
client.connection.hub.invoke('publicCryptoHub', "joinOrderBook", "ETH-BTC");
client.connection.hub.call('publicCryptoHub', 'initSource').then((result) => {
console.log('success:', result)
}).catch((error) => {
console.log('error:', error)
});
client.start();