> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tronrental.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Webhooks Overview

> Receive real-time notifications for account events

## Webhooks

Configure a webhook URL to receive real-time HTTP POST notifications when events occur on your account.

### Supported events

| Event                  | Description                   |
| ---------------------- | ----------------------------- |
| `order.filled`         | Energy order completed        |
| `order.failed`         | Energy order failed           |
| `deposit.confirmed`    | Deposit credited to balance   |
| `invoice.paid`         | Invoice payment received      |
| `invoice.delegated`    | Invoice energy delegated      |
| `smart_mode.transfer`  | Smart Mode transfer processed |
| `withdrawal.completed` | Withdrawal sent               |

### Webhook payload

```json theme={null}
{
  "event": "order.filled",
  "data": {
    "order_id": 1234,
    "address": "TAddress...",
    "energy_amount": 65000,
    "price_trx": "2.75"
  },
  "timestamp": "2026-03-04T12:00:00Z"
}
```

### Requirements

* URL must use **HTTPS**
* Must respond with `2xx` status within 10 seconds
* Failed deliveries are retried up to 3 times with exponential backoff

### Verifying webhook signatures

Every webhook request includes an `X-Webhook-Signature` header containing an HMAC-SHA256 signature. Use this to verify that the request is from TronRental.

The signature is computed over the raw request body using your webhook secret (returned when you [configure your webhook](/api-reference/webhooks/configure)).

<CodeGroup>
  ```python Python theme={null}
  import hmac
  import hashlib

  def verify_webhook(payload: bytes, signature: str, secret: str) -> bool:
      expected = hmac.new(
          secret.encode(),
          payload,
          hashlib.sha256
      ).hexdigest()
      return hmac.compare_digest(expected, signature)

  # In your webhook handler:
  # payload = request.body  (raw bytes)
  # signature = request.headers["X-Webhook-Signature"]
  # secret = "whsec_abc123..."  (from configure response)
  # if not verify_webhook(payload, signature, secret):
  #     return Response(status_code=401)
  ```

  ```javascript JavaScript theme={null}
  const crypto = require("crypto");

  function verifyWebhook(payload, signature, secret) {
    const expected = crypto
      .createHmac("sha256", secret)
      .update(payload)
      .digest("hex");
    return crypto.timingSafeEqual(
      Buffer.from(expected),
      Buffer.from(signature)
    );
  }

  // In your webhook handler:
  // const payload = req.rawBody;  // raw request body string
  // const signature = req.headers["x-webhook-signature"];
  // const secret = "whsec_abc123...";
  // if (!verifyWebhook(payload, signature, secret)) {
  //   return res.status(401).send("Invalid signature");
  // }
  ```
</CodeGroup>

<Warning>
  Always verify the signature before processing webhook data. Use constant-time comparison (`hmac.compare_digest` / `crypto.timingSafeEqual`) to prevent timing attacks.
</Warning>

<Warning>
  Webhook URLs cannot point to `localhost`, `127.0.0.1`, or other private addresses.
</Warning>