# 3. Directory Structure

```
|-- contracts
|-- migrations
|-- truffle.js
|-- static
|-- src
    |-- klaytn
      |-- caver.js
      |-- KlaystagramContract.js
    |-- redux
    |-- pages
      |-- AuthPage.js
      |-- FeedPage.js
    |-- components
      |-- UploadPhoto.js
      |-- Feed.js
      |-- TransferOwnership.js
      |-- ...
    |-- styles
    |-- utils
    |-- index.js
    |-- App.js
```

`contracts/`: 솔리디티 컨트랙트 파일을 담고 있습니다.

`migrations/`: 컨트랙트 배포를 처리하는 자바스크립트 파일을 담고 있습니다.

`truffle.js`: 트러플의 환경설정 파일입니다.

`static/`: Contains static files, such as images and fonts.

`src/index.js`: App's index file. ReactDOM.render logic is in here.

`src/App.js`: App's root component file.

`src/styles`: Overall style definition regarding stylesheet.

`src/redux`: Creates API functions that interact with the contract and keep track of consequent data.

`src/klaytn`: Contains files that support interaction with the Klaytn.

* `src/klaytn/caver.js`: 환경설정에 따라 caver-js 인스턴스화합니다.

  참고) caver-js는 Klaytn 노드와 연결하여 해당 노드나 Klaytn에 배포된 컨트랙트와의 상호작용을 지원해주는 RPC 호출 라이브러리입니다.
* `src/klaytn/Klaystagram.js`: caver-js API를 사용하여 컨트랙트 인스턴스를 작성합니다. 이 인스턴스를 통해 컨트랙트와 상호작용할 수 있습니다.

`src/pages`: Contains two page files that compose Klaystagram app.

* `src/pages/AuthPage.js`: Contains sign up and login form. You can generate private key in the sign up form and use it to login on the app.
* `src/pages/FeedPage.js`: Reads photo data from the contract and show them to users. Also users can upload their pictures in FeedPage.

`src/components`: Contains component files that compose page.

* `src/components/Feed.js`: Reads data from contract and displays photos.
* `src/components/UploadPhoto.js`: Uploads photo by sending transaction to contract.
* `src/components/TransferOwnership.js`: Transfers photo's ownership by sending transaction.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://archive-ko.docs.klaytn.foundation/content/dapp/tutorials/klaystagram/3.-directory-structure.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.