Chokidar calls the upload function, which includes a call of the encrypt function.

encryptAndUpload.js

// Virtru encrypt function.
async function encrypt(path, fileName) {
  const encryptParams = new Virtru.EncryptParamsBuilder()
    .withFileSource(path)
    .withDisplayFilename(fileName)
    .build();
  ct = await client.encrypt(encryptParams);
  var ctString = await ct.toString();
  return ctString;
}

// Upload to Google drive
async function upload(drive, path, fileName, folderId) {
  var fileMetadata = {
    'name': `${fileName}.tdf3.html`,
    parents: [folderId]
  };
  var media = {
    mimeType: 'text/html',
    body: await encrypt(path, fileName)
  };
  drive.files.create({
    resource: fileMetadata,
    media: media,
    fields: 'id'
  }, function (err, file) {
    if (err) {
      console.error(err);
      console.log(`${fileName} - Error.`);
    } else {
      console.log(`${fileName} - Success.`);
    }
  });
}

// Watch the source folder for changes
async function watchFiles(auth) {
  if (store.get('save_location') !== '') {
    console.log(`Watching ${store.get('save_location')}`);
    var email = getCreds()[0];
    var appId = getCreds()[1];
    console.log(email, appId);
    client = new Virtru.Client({email, appId});
    const drive = google.drive({version: 'v3', auth});
    const watcher = chokidar.watch(store.get('save_location'), {
      persistent: true,
      ignoreInitial: true
    });

    watcher.on('add', async path => {
      console.log(path);
      var fileName = path.split("/")[(path.split("/")).length-1];
      upload(drive, path, fileName, folderId);
    });
  }
}