1builder.xyz

Blockchain MEV Builder on Binance Smart Chain (BSC)

Welcome to 1builder.xyz

We provide advanced MEV (Miner Extractable Value) building functionalities on the Binance Smart Chain (BSC). Our platform leverages the eth_sendBundle API to help developers execute atomic bundles of transactions efficiently.

eth_sendBundle API

The eth_sendBundle RPC has the following payload format:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_sendBundle",
  "params": [
    {
      "txs": ["Array[String]"],               // A list of signed transactions to execute in an atomic bundle
      "maxBlockNumber": Number,               // (Optional) The maximum block number for the bundle to be valid
      "minTimestamp": Number,                 // (Optional) The minimum timestamp for which this bundle is valid
      "maxTimestamp": Number,                 // (Optional) The maximum timestamp for which this bundle is valid
      "revertingTxHashes": ["Array[String]"]  // (Optional) A list of tx hashes that are allowed to revert
    }
  ]
}

Params Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_sendBundle",
  "params": [
    {
      "txs": ["0xabc...", "0xdef..."],
      "blockNumber": 39921594,
      "minTimestamp": 0,
      "maxTimestamp": 1719322406 
    }
  ]
}

Response Example

{
  "jsonrpc": "2.0",
  "id": "123",
  "result": {
    "bundleHash": "0x69de38c20497e40e303a467e42f1e566ce495803273be06e2137d5526e9667af"
  }
}

Note: bundleHash is only related to transactions and blockNumber.