# Callback

The Permanent Address Callback is triggered when a transaction to a permanent address receives 12 confirmations on the blockchain. This ensures that the transaction is securely confirmed.

**Transaction Found with 12 Confirmations**

```json
{
    "statusCode": 200,
    "merchant_id": "a56e0-0a10c-73015-9f330",
    "hash": "o3OsLGIMX3KCRGO4plWNhBJqRAiLDU2/L5i+ymIlcliBVWJ/ca6OSmdTb7UAylXQgfpjXZT5ZUC6faYS2aNaQQ==",
    "data": {
        "symbol": "USDT",
        "from": "0x1111111111111111111111111111111111111111",
        "address": "0x0E595b185E323Fa5019E8D73B2F7A3D0f089b582",
        "block": 7677026,
        "txid": "0x73cedead30e3949d0867986f7049923417dd42ca32872aaece85c41703927773",
        "confirmation": 12,
        "balance": 124.6261,
        "timestamp": 1586350781,
        "risk_level": 1
    }
}
```

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For the "Permanent Address Callback" section of your API documentation, it's important to clearly describe how the callback mechanism works, especially regarding transaction confirmations for permanent addresses. Here's how you can structure this section:

***

#### Permanent Address Callback

**Brief Description**

The Permanent Address Callback is triggered when a transaction to a permanent address receives 12 confirmations on the blockchain. This ensures that the transaction is securely confirmed.

**Transaction Found with 12 Confirmations**

```json
{
    "statusCode": 200,
    "merchant_id": "a56e0-0a10c-73015-9f330",
    "hash": "o3OsLGIMX3KCRGO4plWNhBJqRAiLDU2/L5i+ymIlcliBVWJ/ca6OSmdTb7UAylXQgfpjXZT5ZUC6faYS2aNaQQ==",
    "data": {
        "symbol": "USDT",
        "from": "0x1111111111111111111111111111111111111111",
        "address": "0x0E595b185E323Fa5019E8D73B2F7A3D0f089b582",
        "block": 7677026,
        "txid": "0x73cedead30e3949d0867986f7049923417dd42ca32872aaece85c41703927773",
        "confirmation": 12,
        "balance": 124.6261,
        "timestamp": 1586350781,
        "risk_level": 1
    }
}
```

**Callback Parameters**

<table><thead><tr><th width="176.33333333333331">Parameter Name</th><th width="142">Type</th><th>Explanation</th></tr></thead><tbody><tr><td>symbol</td><td>string</td><td>Type of token (e.g., 'USDT', 'USDC'', 'tron-usdt', 'tron-usdc').</td></tr><tr><td>from</td><td>string</td><td>The source address from which the tokens are sent.</td></tr><tr><td>address</td><td>string</td><td>The recipient's permanent address.</td></tr><tr><td>block</td><td>string</td><td>The block number on the blockchain where the transaction was included.</td></tr><tr><td>txid</td><td>string</td><td>Blockchain transaction identifier.</td></tr><tr><td>confirmation</td><td>number</td><td>The number of confirmations the transaction has received.</td></tr><tr><td>balance</td><td>decimal</td><td>The amount of tokens received.</td></tr><tr><td>timestamp</td><td>number</td><td>Timestamp of when the transaction was processed.</td></tr><tr><td>risk_level</td><td>number</td><td>0, pending 1 low, 2 high, 3 medium, 4 severe</td></tr></tbody></table>

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