client-lib-api.ts

class API {
  url: string;

  constructor(url: string) {
    this.url = url;
  }

  // Public methods
  submitPost(name: string, content: string) {
    return this.request<{ post: Post; invoice: string; }>(
      'POST',
      '/posts',
      { name, content },
    );
  }

  getPosts() {
    return this.request<Post[]>('GET', '/posts');
  }

  getPost(id: number) {
    return this.request<Post>('GET', `/posts/${id}`);
  }
  
  /* ... */
}

// Export a default API that points at the API_PATH environment variable
export default new API(process.env.API_PATH as string);