> For the complete documentation index, see [llms.txt](https://hyperhashing.gitbook.io/hyperhashing-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hyperhashing.gitbook.io/hyperhashing-api/single-use-payment-v1/bitcoin-call-back.md).

# Bitcoin Call Back

The Bitcoin Callback feature is designed to handle transaction confirmations and address timeouts. The system checks the transaction status at multiple intervals and notifies the callback URL accordingly.

**Callback Time Intervals**

1. **15 mins:** Initial check for transaction.
2. **30 mins:** Second check if no transaction is found initially.
3. **1 hour:** Third check.
4. **2 hours:** Fourth check.
5. **4 hours:** Fifth check.
6. **8 hours:** Final check.

After 15 minutes, the address is set to timeout. If the transaction is found after the timeout, the selling price is recalculated and notified through the callback URL.

**Transaction Found**

```json
 {
  "statusCode": 200,
  "merchant_id": "9cc5c-d243a-9f952-66b92",
  "hash": "0YrwsUOcXmCX8GpY4N64CgEwsYh/Gk3s2m56DoBiwM2Xp3AHthc8R14PAfhb0CtDuTENB+K1fMaA5XnvJBHLoA==",
  "data": {
    "address": "3MitLfWoRxvaA3FHZHqdDQJAQSUFGnkAcG",
    "balance": 0.00981,
    "sell_price": 9260.25,
    "usd_balance": 90.84,
    "txid": "txid1234456789876543",
    "timestamp": 1582949871
  }
}
```

**Address Timeout**

```json
 {
  "statusCode": 10011,
  "merchant_id": "9cc5c-d243a-9f952-66b92",
  "hash": "HbUGU9q0DBMl/Lgzfy/3XkvXzEilh51GMbs3uEB0rNcguxjNfLuo1CGAsqYvdwzr90s+TAoaWdLsnjUrc5He2A==",
  "data": {
    "address": "3MitLfWoRxvaA3FHZHqdDQJAQSUFGnkAcG",
    "msg": "Address timeout",
    "timestamp": 1582949945
  }
}
```

**Confirmation Counts**

* **1 Confirmation:**

  ```json
   {
    "statusCode": 200,
    "merchant_id": "9cc5c-d243a-9f952-66b92",
    "hash": "dEebptMC3XYervCusINtGn9k/KJ/XTTRI9ulkGveED/G9bxaAEZ/uDCvmssCpiV81K8g+Q67fCwMi6l8+wdiJQ==",
    "data": {
      "address": "3MitLfWoRxvaA3FHZHqdDQJAQSUFGnkAcG",
      "txid": "txid1234456789876543",
      "confirmation": 1,
      "usd_balance": 95.47,
      "balance": 0.01045,
      "sell_price": 8727.2,
      "timestamp": 1582950104,
      "risk_level": 1
    }
  }
  ```
* **3 Confirmations:**

  ```json
   {
    "statusCode": 200,
    "merchant_id": "9cc5c-d243a-9f952-66b92",
    "hash": "uxUNsinUTxD7YRAAJiLNNfDKn7+KXUY3k/l7nPz9Tpx9Zhqc2jQzb65gTFRfT7DZp0+S7lotuiT36gr5Qw+4ow==",
    "data": {
      "address": "3MitLfWoRxvaA3FHZHqdDQJAQSUFGnkAcG",
      "txid": "txid1234456789876543",
      "confirmation": 3,
      "usd_balance": 95.47,
      "balance": 0.01045,
      "sell_price": 8727.2,
      "timestamp": 1582950200,
      "risk_level": 1
    }
  }
  ```
* **6 or More Confirmations:**

  ```json
   {
    "statusCode": 200,
    "merchant_id": "9cc5c-d243a-9f952-66b92",
    "hash": "uxUNsinUTxD7YRAAJiLNNfDKn7+KXUY3k/l7nPz9Tpx9Zhqc2jQzb65gTFRfT7DZp0+S7lotuiT36gr5Qw+4ow==",
    "data": {
      "address": "3MitLfWoRxvaA3FHZHqdDQJAQSUFGnkAcG",
      "txid": "txid1234456789876543",
      "confirmation": 6,
      "usd_balance": 95.47,
      "balance": 0.01045,
      "sell_price": 8727.2,
      "timestamp": 1582950200,
      "risk_level": 1
    }
  }
  ```

#### Response Parameters

<table><thead><tr><th width="249">Parameter Name</th><th width="130.33333333333331">Type</th><th>Explanation</th></tr></thead><tbody><tr><td>address</td><td>string</td><td>Bitcoin address involved in the transaction</td></tr><tr><td>txid</td><td>string</td><td>Blockchain transaction identifier</td></tr><tr><td>confirmation</td><td>number</td><td>Number of confirmations for the transaction</td></tr><tr><td>usd_balance</td><td>decimal</td><td>The equivalent balance in USD</td></tr><tr><td>balance</td><td>decimal</td><td>The amount of Bitcoin received</td></tr><tr><td>sell_price</td><td>decimal</td><td>The price of Bitcoin at the time of transaction</td></tr><tr><td>timestamp</td><td>number</td><td>Timestamp when the transaction occurred</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>