> For the complete documentation index, see [llms.txt](https://docs.decentraland.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.decentraland.org/contributor/contributor-ko/social-service/login.md).

# 로그인

Social Service의 인증 과정은 다음과 상호작용하는 작업을 포함합니다 [Matrix 서버](https://matrix.org/). 이는 내부적으로 비공개 채팅 하위 시스템에 사용됩니다. 사용자는 주소를 사용해 Matrix에 로그인하고, 인증 토큰을 얻기 위해 fetch 작업에 서명해야 합니다. 이 토큰은 이후 Social Service와의 상호작용을 승인하는 데 사용됩니다.

### HTTP 요청

인증 토큰을 획득하려면, 다음과 같이 [Matrix 문서에서 설명하는](https://spec.matrix.org/v1.3/client-server-api/#login)다음 URL로 POST 요청을 보내야 합니다: `https://social.decentraland.org/_matrix/client/r0/login` 아래 예시와 같습니다.

Matrix에 로그인하려면 AuthChain으로 메시지를 만들고 서명해야 합니다.

#### 요청 본문

```json
{
  "auth_chain": authChain,
  "identifier": {
    "type": "m.id.user",
    "user": address
  },
  "timestamp": timestamp.toString(),
  "type": "m.login.decentraland"
}
```

#### 응답 본문

```json
{
  "user_id": "@0x123abC:decentraland.org",
  "social_user_id": "0x123abC",
  "access_token": "syt_SomETokEN",
  "device_id": "FRFREGRG",
  "home_server": "decentraland.org",
  "well_known": {
      "m.homeserver": {
          "base_url": "https://synapse.decentraland.org/"
      }
  }
}
```

필드에 있는 인증 토큰은 `access_token` 이후 Social Service와의 상호작용에 필요합니다.

### JS 코드 예시

```javascript
import fetch from 'cross-fetch'
import { AuthIdentity, Authenticator } from '@dcl/crypto'

export async function getMatrixToken(matrixUrl: string, address: string, identity: AuthIdentity): Promise<string> {
  const timestamp = Date.now()
  const authChain = Authenticator.signPayload(identity, timestamp.toString())

  try {
    const response = await fetch(`${matrixUrl}/_matrix/client/r0/login`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({
        auth_chain: authChain,
        identifier: {
          type: 'm.id.user',
          user: address
        },
        timestamp: timestamp.toString(),
        type: 'm.login.decentraland'
      })
    })

    if (response.ok) {
      const responseBody = await response.json()
      return responseBody.access_token
    } else {
      throw new Error(`Matrix 서버가 ${response.status} 상태 코드로 응답했습니다`)
    }
  } catch (error) {
    throw new MatrixLoginError(isErrorWithMessage(error) ? error.message : '알 수 없는 오류')
  }
}
```

코드 출처 [social-rpc-client-js](https://github.com/decentraland/social-rpc-client-js/blob/main/src/client.ts#L14)


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