Node.js with custom endpoint

import { Storage } from '@google-cloud/storage';
import { FlashbackGCSStorage } from '@flashbacktech/flashbackclient/gcs';

const config = {
    apiEndpoint: process.env.TEST_GCS_AWS_PROVIDER_URL,
    tokenUri: process.env.TEST_GCS_AWS_PROVIDER_URL + '/token',
    credentials: {
      client_email: process.env.TEST_GCS_CLIENT_EMAIL!,
      private_key: process.env.TEST_GCS_PRIVATE_KEY,
    },
  },
}

// Use custom auth client with custom token endpoint
const tokenUri = config.tokenUri || `${config.apiEndpoint}/token`;
const authClient = new FlashbackAuthClient(
  tokenUri,
  config.credentials,
  [
    'https://www.googleapis.com/auth/devstorage.full_control',
    'https://www.googleapis.com/auth/devstorage.read_only',
    'https://www.googleapis.com/auth/devstorage.read_write'
  ]
);

const storage = new Storage({
  apiEndpoint: config.apiEndpoint,
  authClient,
  useAuthWithCustomEndpoint: true,
});

const bucket = storage.bucket(bucketName);

// 1. Check if bucket exists
try {
  const [exists] = await storage.bucket(bucketName).exists();
  expect(exists).toBe(true);
} catch (error) {
  console.error('Error checking bucket existence:', error);
  throw error;
}