# User Authentication

### Authentication Flow

#### 1. Wallet Connection

```javascript
// Connect wallet using AppKit
import { useAppKit, useAppKitAccount } from "@reown/appkit/react";

const { open } = useAppKit();
const { address, isConnected } = useAppKitAccount();
```

#### 2. Message Signing

```javascript
// Sign fixed message
const messageToSign = "cooking.city";
const encodedMessage = new TextEncoder().encode(messageToSign);
const signature = await walletProvider.signMessage(encodedMessage);
```

#### 3. Login to Obtain Token

**Endpoint**: `POST /api/auth/solana/login`

**Request Parameters**:

```json
{
  "invite_code": null,
  "message": "cooking.city",
  "public_key": "user_wallet_public_key",
  "signature": "signature_result_in_hex_format"
}
```

**Response Example**:

```json
{
  "code": 200,
  "data": {
    "profile": {
      "address": "user_wallet_address",
      "avatar_url": null,
      "bio": null,
      "created_at": "2024-01-01T00:00:00Z",
      "nick_name": "user_nickname"
    },
    "token": "jwt_token_string"
  }
}
```

### Token Usage

Add the obtained token to request headers:

```
Authorization: Bearer your_jwt_token
```

### User Information Query

**Endpoint**: `GET /api/auth/me`

**Request Headers**:

```
Authorization: Bearer your_jwt_token
```

**Response Example**:

```json
{
  "code": 200,
  "data": {
    "profile": {
      "address": "user_wallet_address",
      "avatar_url": "avatar_url",
      "bio": "user_bio",
      "created_at": "creation_time",
      "nick_name": "nickname",
      "twitter_screen_name": "twitter_username",
      "telegram_username": "telegram_username",
      "points": "points_amount"
    }
  }
}
```

### Key Points

* Fixed signing message: `"cooking.city"`
* Signature result must be converted to hex format
* Token expiration is set according to business requirements
* Supports invitation code mechanism (invite\_code can be null)


---

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