# broadcast\_tx\_async - NEAR Protocol

This method is used to send a signed transaction to the NEAR blockchain without waiting for it to be confirmed on-chain. It only submits the transaction and immediately returns the transaction hash.

## Supported Networks

* Mainnet

## Parameters

| Parameter          | Type   | Required | Description                                |
| ------------------ | ------ | -------- | ------------------------------------------ |
| `signed_tx_base64` | string | Yes      | The signed transaction, encoded in Base64. |

## Request Example

**Base URL**

```bash
    https://go.getblock.io/<ACCESS_TOKEN>
```

**Example(cURL)**

```bash
  curl -X POST https://go.getblock.io/<ACCESS_TOKEN> \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0",
  "method": "broadcast_tx_async",
  "params": ["DgAAAHNlbmRlci50ZXN0bmV0AOrmAai64SZOv9e/naX4W15pJx0GAap35wTT1T/DwcbbDwAAAAAAAAAQAAAAcmVjZWl2ZXIudGVzdG5ldNMnL7URB1cxPOu3G8jTqlEwlcasagIbKlAJlF5ywVFLAQAAAAMAAACh7czOG8LTAAAAAAAAAGQcOG03xVSFQFjoagOb4NBBqWhERnnz45LY4+52JgZhm1iQKz7qAdPByrGFDQhQ2Mfga8RlbysuQ8D8LlA6bQE="],
  "id": "getblock.io"}'
```

## Response

```json
{
    "jsonrpc": "2.0",
    "result": "6zgh2u9DqHHiXzdy9ouTP7oGky2T4nugqzqt9wJZwNFm",
    "id": "getblock.io"
}
```

## Response Parameter Definition

| Field    | Type   | Description                                                 |
| -------- | ------ | ----------------------------------------------------------- |
| `result` | string | The transaction hash returned immediately after submission. |
| `id`     | string | The user-defined identifier for tracking the request.       |

## Use Cases

* Submit transactions asynchronously
* Enable batch transaction submissions for high-frequency operations.
* Improve user experience in apps that handle multiple transaction requests.

## Code Example

**Node(Axios)**

```js
     import axios from 'axios'
    let data = JSON.stringify({
      "jsonrpc": "2.0",
      "method": "broadcast_tx_async",
      "params": [
        "DgAAAHNlbmRlci50ZXN0bmV0AOrmAai64SZOv9e/naX4W15pJx0GAap35wTT1T/DwcbbDwAAAAAAAAAQAAAAcmVjZWl2ZXIudGVzdG5ldNMnL7URB1cxPOu3G8jTqlEwlcasagIbKlAJlF5ywVFLAQAAAAMAAACh7czOG8LTAAAAAAAAAGQcOG03xVSFQFjoagOb4NBBqWhERnnz45LY4+52JgZhm1iQKz7qAdPByrGFDQhQ2Mfga8RlbysuQ8D8LlA6bQE="
      ],
      "id": "getblock.io"
    });
    
    let config = {
      method: 'post',
      maxBodyLength: Infinity,
      url: 'https://go.getblock.io/<ACCESS_TOKEN>',
      headers: { 
        'Content-Type': 'application/json'
      },
      data : data
    };
    axios.request(config)
    .then((response) => {
      console.log(JSON.stringify(response.data));
    })
    .catch((error) => {
      console.log(error);
    });
```

**Python(Requests)**

```python
  import requests
  import json
  url = "https://go.getblock.io/<ACCESS_TOKEN>"
  payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "broadcast_tx_async",
    "params": [
      "DgAAAHNlbmRlci50ZXN0bmV0AOrmAai64SZOv9e/naX4W15pJx0GAap35wTT1T/DwcbbDwAAAAAAAAAQAAAAcmVjZWl2ZXIudGVzdG5ldNMnL7URB1cxPOu3G8jTqlEwlcasagIbKlAJlF5ywVFLAQAAAAMAAACh7czOG8LTAAAAAAAAAGQcOG03xVSFQFjoagOb4NBBqWhERnnz45LY4+52JgZhm1iQKz7qAdPByrGFDQhQ2Mfga8RlbysuQ8D8LlA6bQE="
    ],
    "id": "getblock.io"
  })
  headers = {
    'Content-Type': 'application/json'
  }
  response = requests.request("POST", url, headers=headers, data=payload)
  print(response.text)
```

## Error Handling

| HTTP Code                     | Error Message              | Description                                                |
| ----------------------------- | -------------------------- | ---------------------------------------------------------- |
| **400 Bad Request**           | `REQUEST_VALIDATION_ERROR` | The Base64-encoded transaction is malformed or incomplete. |
| **403 Forbidden**             | `RBAC: access denied`      | The GetBlock access token is incorrect or missing.         |
| **500 Internal Server Error** | `Node error`               | The node failed to broadcast the transaction.              |

## Integration with Web3

By integrating `/broadcast_tx_async` into your dApp, developers can:

* Streamline transaction broadcasting for dApps and wallets.
* Offload transaction confirmation logic to background workers.
* Maintain smooth performance in decentralised applications by avoiding delays.


---

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