const { copyFile } = require('google-cloud-storage-sync');

(async () => {
  const options = {
    srcBucketName: 'src_bucket_name',
    srcFilename: 'src_file',
    destBucketName: 'dest_bucket_name',
    destFilename: 'dest_file',
    retries: 3
  };
  
  await copyFile(options);
});