whatsapp reverse eng js version

const randomBytes = require('randombytes');
const WebSocket = require('ws');
const QrCode = require('qrcode');

const createCounter = start => {
  let count = start || 0;
  return () => {
    return count++;
  }
}

const incrementCount = createCounter(1);

const createMessageTag = () => {
  const date = new Date();
  const dateTime = date.getTime();
  const textTime = dateTime.toString().substring(0, 10);
  const count = incrementCount();
  const messageTag = `${textTime}.--${count}`;
  return messageTag;
}

const msgTag = createMessageTag();
const clientId = randomBytes(16);

const WHATSAPP_WEB_VERSION = '0,4,2088';
let msg = `${msgTag},[\"admin\",\"init\",[${WHATSAPP_WEB_VERSION}],[\"Windows\",\"Chrome\",\"10\"],\"${clientId}\",true]`;

const getJsonText = (text) => {
  const indexOfFirstComma = text.indexOf(',');
  const newText = text.substring(indexOfFirstComma + 1, text.length);
  const jsonText = JSON.parse(newText);
  return jsonText;
}

const isStatusOk = text => {
  const jsonText = getJsonText(text);
  const { status } = jsonText;
  return status === 200
}

const isConnected = text => {
  const jsonText = getJsonText(text);
  const { connected } = jsonText;
  return connected || false;
}

const whatsappHost = 'wss://web.whatsapp.com/ws';
const ws = new WebSocket(whatsappHost, {
  origin: 'https://web.whatsapp.com'
});

ws.on('open', () => {
  ws.send(`web socket connected on ${whatsappHost}`);
  console.log('connected websocket');
  ws.send(msg);
});

ws.on('message', (data) => {
  console.log('ws data: ', data);
  const statusConnection = isStatusOk(data);
  console.log('Connection status:', statusConnection);

  if(statusConnection) {
    const connectionInfo = getJsonText(data);
    console.log('connection info:', connectionInfo);

    const qrCodeOptions =  { type: 'terminal', errorCorrectionLevel: 'Q' };
    const { ref, } = connectionInfo;
    const codeToGenerate = ``;
    QrCode.toString(codeToGenerate, qrCodeOptions, (err, url) => {
      if(err) {
        console.log('error:', err);
        return;
      }
      console.log('QRCODE:');
      console.log(url);
    })
  }
});