# Check transaction status

After submitting a wallet-signed artifact, you can verify on-chain status using the transaction status endpoint. Supports EVM, Solana, and Bitcoin.

## When to use

* After `POST /swap/{swapId}/signing` leads to a broadcast transaction hash in your flow.
* To poll until the transaction is `confirmed` or `failed`.
* To show users real-time status (e.g. pending → confirmed).

## Request

**Endpoint:** `GET /status/transaction/{txHash}`\
**Required query:** `chainRef` — chain where the transaction was submitted.

```bash
curl -X GET 'https://api.gateway.zert.com/api/v1/status/transaction/0x123...abc?chainRef=eth-mainnet' \
  -H 'Authorization: Bearer YOUR_API_KEY'
```

Use the correct `chainRef` for the chain of the tx (e.g. `eth-mainnet`, `polygon-mainnet`, `solana-mainnet`, `bitcoin`).

## Response

```json
{
  "data": {
    "txHash": "0x123...abc",
    "chain": "eth-mainnet",
    "status": "confirmed",
    "confirmedAtMs": 1745400000000
  },
  "meta": { "requestId": "...", "timestamp": "..." }
}
```

## Status values

| Status      | Description                  |
| ----------- | ---------------------------- |
| `pending`   | Submitted, not yet confirmed |
| `confirmed` | Confirmed on chain           |
| `failed`    | Transaction failed           |

## Polling example

Poll every few seconds until `status` is `confirmed` or `failed`, or until a timeout:

1. Call `GET /status/transaction/{txHash}?chainRef=...`.
2. If `data.status` is `confirmed` or `failed`, stop.
3. If `pending`, wait (e.g. 3–5 seconds) and repeat.
4. Treat `404` as not indexed or not found yet, and retry only if that matches your expected flow.

See [Get Transaction Status](/api-reference/status-and-tracking/get-transaction-status.md) for full parameters, response fields, and error codes.


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```
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```

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