> For the complete documentation index, see [llms.txt](https://kwanjoong-dev.gitbook.io/unity-ui-storyboard/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kwanjoong-dev.gitbook.io/unity-ui-storyboard/en/readme/undefined-1/ui/gateway.md).

# Gateway

* Responsible for direct communication with the real world
* Must be configured as an interface
* It should only serve to communicate and never **business logic, domain logic, etc.**.

```csharp
public interface IHttpClientGateway
{
    // Return json object from server using newtonsoft json
    public UniTask<TResponse> RequestAsync<TRequest, TResponse>(string url, TRequest requestData);
}
```

```csharp
public class HttpClientGateway : IHttpClientGateway
{
    public async UniTask<TResponse> RequestAsync<TRequest, TResponse>(string url, TRequest requestData)
    {
        string jsonRequest = JsonConvert.SerializeObject(requestData); // 직렬화
        string jsonResponse = "{}"; // 서버에서 받은 JSON 응답
        await UniTask.Delay(1000); // 서버 통신 대신 1초 대기
        return JsonConvert.DeserializeObject<TResponse>(jsonResponse); // 역직렬화
    }
}
```