const gt = new GT({ projectId: 'your-project-id', apiKey: 'your-api-key' });

const result = await gt.downloadFileBatch([
  'translation-id-1', 
  'translation-id-2', 
  'translation-id-3'
]);

type DownloadFileBatchResult = {
  files: File[];
  count: number;
}

type File = {
  id: string;
  fileName: string;
  data: string;
  metadata: any;
}

// (1) Create a GT instance
const targetLocales = ['es', 'fr', 'de'];
const gt = new GT({
  projectId: 'your-project-id',
  apiKey: 'your-api-key',
});

// (2) Upload the file
const fileUpload = {
  content: fileContents,
  fileName: filePath,
  fileFormat: 'JSON',
  locale: 'en',
};
const files = [ { source: fileUpload } ];
const { uploadedFiles } = await gt.uploadSourceFiles(
  files,
  { sourceLocale: 'en' }
);

// (3) Enqueue the file translation job
const enqueueResult = await gt.enqueueFiles(
  uploadedFiles,
  {
  sourceLocale: 'en',
  targetLocales: targetLocales,
});

// (4) Wait for all translations to be completed
let translationIds = [];
const statusQuery = Object.values(enqueueResult.data).flatMap(({fileName, versionId}) => {
  return targetLocales.map((locale) => ({locale, fileName, versionId}));
});
while (true) {
  const status = await gt.checkFileTranslations(statusQuery);
  if (status.translations.length === statusQuery.length) {
    translationIds = status.translations.map(translation => translation.id);
    break;
  }
  await new Promise(resolve => setTimeout(resolve, 1000));
}

// (5) Download the file
const result = await gt.downloadFileBatch(translationIds);