var Link = require('trezor-link-node');
var LowlevelTransport = Link.Lowlevel;
var NodeHidPlugin = Link.NodeHid;

var link = new LowlevelTransport(new NodeHidPlugin());

// for simple config load; you can also load by file API from a disk without node-fetch
var fetch = require('node-fetch');

var config = fetch('https://wallet.mytrezor.com/data/config_signed.bin').then(function (response) {
  if (response.ok) {
    return response.text();
  } else {
    throw new Error(`Fetch error ${response.status}`);
  }
});

return link.init().then(function () { 
  return config.then(function (configData) {
    return link.configure(configData);
  });
}).then(function () {
  return link.enumerate();
}).then(function (devices) {
  return link.acquire(devices[0].path);
}).then(function (session) {
  return link.call(session, 'GetFeatures', {}).then(function (features) {
    console.log(features);
    return link.release(session);
  });
}).catch(function (error) {
  console.error(error);
});