> For the complete documentation index, see [llms.txt](https://docs.titanbuilder.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.titanbuilder.xyz/api/eth_sendendofblockbundle.md).

# eth\_sendEndOfBlockBundle

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_sendEndOfBlockBundle",
  "params": [
    {
      txs,                   // Array[String], A list of signed transactions to execute in an atomic bundle, list can be empty for bundle cancellations
      blockNumber,           // (Optional) String, a hex-encoded block number for which this bundle is valid. Default, current block number
      revertingTxHashes,     // (Optional) Array[String], A list of tx hashes that are allowed to revert or be discarded     
      targetPools,           // Array[String], A list of pool addresses that this bundle is targeting
      replacementUuid,       // (Optional) String, any arbitrary string that can be used to replace or cancel this bundle
      replacementSeqNumber,  // (Optional) Number, monotonically increasing sequence for bundles sharing the same replacementUuid. Later bundles must have a higher sequence or they are dropped. If 0 or omitted, ordering falls back to builder receive time.
    }
  ]
}
```

After building a block, any end-of-block bundle that contains a target pool that has been modified will be simulated at the end-of-block state. Successfully simulated bundles are then added to the block.\
\
Note: end-of-block bundles are handled with the same atomicity and revert guarantees as normal bundles. 


---

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