# Project Builder

### RPC Endpoint

{% hint style="info" %}
The project builders could send bundle to the [Endpoint Exclusive for Project](../../rpc/bsc/integration.md)
{% endhint %}

https://bsc.blockrazor.xyz



### Request parameters

{% hint style="info" %}
On BSC, `eth_sendMevBundle` allows transactions with 0 gwei in the bundle, but the average gasPrice of transactions(excluding those from the public mempool) in the bundle must still be no less than 0.05 gwei. Since head builders of BSC have a preference for this model, it is recommended to construct transactions with 0 gwei.
{% endhint %}

#### **Bundle**

<table><thead><tr><th width="183">Parameters</th><th width="118">Mandatory</th><th width="98">Format</th><th width="132">Example</th><th>Remark</th></tr></thead><tbody><tr><td>txs</td><td>mandatory</td><td>[]bytes</td><td>[ "0xf84a……e54284" ]</td><td>raw txs, up to 50 transactions allowed to be set</td></tr><tr><td>revertingTxHashes</td><td>optional</td><td>[]hash</td><td>["0x1f23……0abb1e"]</td><td>Transactions that allow to be reverted, a subset of txs</td></tr><tr><td>maxBlockNumber</td><td>optional</td><td>uint64</td><td>39177941</td><td>The maximum block number for the bundle to be valid, with the default set to the current block number + 100</td></tr></tbody></table>



### Request Example

```json
curl -X POST -H "Content-Type: application/json" --data '{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_sendMevBundle",
  "params": [{
    "Txs": [
"0xf8668203988405f5e100825208942ee393c739036a7660ec11bf2101d537eb52f3ac80808193a06836d5f4052376dc3114794da5fedd7a5b8090ddae0ec45dfa66c234fcabb6efa07cf17dad992c33e8e3e4d82355cfe12d3be2560fc2b0873c36dce398088d8e4f"
    ],
    "revertingTxHashes":[],
    "maxBlockNumber":62934913
  }]
}' https://bsc.blockrazor.xyz
```



### Response Example

normal

```json
{"jsonrpc":"2.0","id":1,"result": "0x11111111..."}
```

abnormal

```json
{"jsonrpc":"2.0","id":1,"jsonerror":{"code":-38000,"message":"nonce too low: address 0x9Abae1b279A4Be25AEaE49a33e807cDd3cCFFa0C, tx: 0 state: 45"}}
```