const hitbtc=require('node-api-hitbtc');

  const publicAPI=new hitbtc.publicApi();

  const hitbtc=require('node-api-hitbtc');

  const auth = {
    apikey: 'MY_API_KEY',
    secret: 'MY_API_SECRET'
  };

  const privateAPI=new hitbtc.privateApi(auth);

  const hitbtc=require('node-api-hitbtc');

  const auth = {
    apikey: 'MY_API_KEY',
    secret: 'MY_API_SECRET'
  };

  const marketAPI=new hitbtc.sockets.marketApi();
  marketAPI.socket._ws.on('initialized', async () => {
    // do your own initialization
  });

  const tradingAPI=new hitbtc.sockets.tradingApi(auth);
  tradingAPI.setHandler('orders', (symbol,method,data,option) => { updateOrder(symbol,method,data); });

  tradingAPI.socket._ws.on('authenticated', async () => {
    const res=await tradingAPI.subscribeOrderUpdates();
  });

  tradingAPI.socket._ws.on('closed', async () => {
    // do something, like clean-up and reconnect
  });

  function updateOrder(symbol,method,data) {
    // do something
  };