# Bundle Submission

Searchers can submit **MEV bundles** to the **Cloud API**, where they are validated and forwarded to **Builders** that are connected to BSC validators participating in Bloxroute’s MEV solution. Bundles are optimized to maximize validator rewards, ensuring efficient MEV extraction.

[Purchase the **Bundle Size Add-on**](https://portal.bloxroute.com/pricing) to **send bundles with more than 2 transactions.**

## Submission Endpoint

* Method: `blxr_submit_bundle`
* Endpoint: `api.blxrbdn.com`
* Request type: *`HTTPS,WSS`*

### **Parameters**

| `txs`                      | A list of raw transaction bytes without a 0x prefix, separated by a comma.                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| -------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `blockchain_network`       | Blockchain network name. Must be BSC-Mainnet.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| `max_block_number`         | *\[Optional]* Default: current block number + 100                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| `reverting_tx_hashes`      | *\[Optional]* A list of transaction hashes within the bundle that are allowed to revert. Default is empty list: the whole bundle would be excluded if any transaction reverts.                                                                                                                                                                                                                                                                                                                                                               |
| `mev_builders`             | <p><em>\[Optional, default: <code>bloxroute</code> builder]</em> A dictionary of MEV builders that should receive the bundle without delay. For each MEV builder, a signature (which can be an empty string) is required. Possible MEV builders are:</p><ul><li><code>bloxroute</code>: bloXroute internal builder (always enabled for all MEV bundle submission requests)</li><li><code>all</code>: all builders</li><li>Other options: <code>48club</code>, <code>blockrazor</code>, <code>jetbldr</code>, <code>nodereal</code></li></ul> |
| `no_merge`                 | *\[Optional, default: False]* Bundle merge can increase block value and inclusion rate.                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| `backrunme_reward_address` | *\[Optional]* When the bundle is enrolled in the BackRunMe service, the transaction's from address collects backrun reward by default. The reward address can be overwritten with this parameter.                                                                                                                                                                                                                                                                                                                                            |

### **Examples**&#x20;

{% tabs %}
{% tab title="HTTPS" %}

```bash
curl https://api.blxrbdn.com \
    -X POST \
    -H "Content-Type: application/json" \
    -H "Authorization: <YOUR-AUTHORIZATION-HEADER>" \
    -d '{
         "id": "1", 
         "method": "blxr_submit_bundle", 
         "params": {
            "txs": ["ab..ab", "cd..cd"],
            "blockchain_network": "BSC-Mainnet",
            "mev_builders": {
                "all": ""
            }
          }
        }'
```

{% endtab %}

{% tab title="wscat" %}
{% code overflow="wrap" %}

```bash
wscat -c wss://api.blxrbdn.com/ws --header "Authorization: <YOUR-AUTHORIZATION-HEADER>"
> {"id": "1", "method": "blxr_submit_bundle", "params": {"txs": ["ab..ab", "cd..cd"], "blockchain_network": "BSC-Mainnet", "mev_builders": {"all": ""}}}
```

{% endcode %}
{% endtab %}
{% endtabs %}

#### Response:

```json
{"id":"1","result":{"bundleHash":"0x4d44c34201452e4799d309f94b2e95c7cfb1599f9be33d60085f4b5808c52bb6"},"jsonrpc":"2.0"}
```