> ## Documentation Index
> Fetch the complete documentation index at: https://docs.validationcloud.io/llms.txt
> Use this file to discover all available pages before exploring further.

# trace_replayBlockTransactions

Replays all transactions in a block returning the requested traces for each transaction.

This method will use `270` [Compute Units](/nodeapi/about/billing).

***

## **Parameters**

`blockNumber` - String - <span style={{color: "red"}}>Required</span> - The block number as a string in hexadecimal format or tags. The supported tag values include:

* `earliest` - For the earliest/genesis block
* `latest` for the latest mined block
* `safe` for the most recent secure block
* `finalized` for the most recent secure block accepted by more than 2/3 of validators

`array` - array - <span style={{color: "red"}}>Required</span> - The type of trace, which can be one of the following:

* `vmTrace` string - To get a full trace of the virtual machine's state during the execution of the given transaction, including for any subcalls
* `trace` - string - To get the basic trace of the given transaction
* `stateDiff` - string - To get information on altered Ethereum state due to execution of the given transaction

## **Returns**

`array` - array - The block traces, which have the following fields

* `output` - string - The data returned as output encoded in hexadecimal format
* `stateDiff` - object - The altered state due to execution of the given transaction, or null if not available
* `trace` - array - An array of basic trace objects for the given transaction containing:
  * `action` - object The ParityTrace action object containing call details
    * `from` - string - The address of the sender
    * `callType` - string - The type of method such as call, staticcall, delegatecall
    * `gas` - string - The gas provided by the sender, encoded as hexadecimal
    * `input` - string - The input data sent along with the transaction
    * `to` - string - The address of the receiver
    * `value` - string - The integer of the value sent with this transaction, encoded as hexadecimal
  * `result` - object - The execution result of the trace
    * `gasUsed` - string - The amount of gas used by this trace
    * `output` - string - The return value of the contract call, empty if no RETURN executed
  * `subtraces` - integer - The number of subtraces (internal calls) within this trace
  * `traceAddress` - array - The list of addresses where the call executed, including parent calls and order
  * `type` - string The type of the trace, such as call or create
* `vmTrace` - object - The full trace of the virtual machine's state during execution, including sub-calls, or null if not available
* `transactionHash` - string - The transaction hash

```json theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
// Result
{
    "jsonrpc": "2.0",
    "id": 1,
    "result": [
        {
            "output": "0x",
            "stateDiff": null,
            "trace": [
                {
                    "type": "call",
                    "action": {
                        "from": "0xea674fdde714fd979de3edf0f56aa9716b898ec8",
                        "callType": "call",
                        "gas": "0x7148",
                        "input": "0x",
                        "to": "0x60f18d941f6253e3f7082ea0db3bc3944e7e9d40",
                        "value": "0x554b81ec144eea9"
                    },
                    "result": {
                        "gasUsed": "0x0",
                        "output": "0x"
                    },
                    "subtraces": 0,
                    "traceAddress": []
                }
            ],
            "vmTrace": null,
            "transactionHash": "0x4a1e3e3a2aa4aa79a777d0ae3e2c3a6de158226134123f6c14334964c6ec70cf"
        }
    ]
}
```

<CodeGroup>
  ```bash title="mainnet" theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
  curl https://mainnet.ethereum.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
      -X POST \
      -H "Content-Type: application/json" \
      -d '{"jsonrpc":"2.0","method":"trace_replayBlockTransactions","params":["0x989680",["trace"]],"id":1}'
  ```

  ```bash title="testnet" theme={"theme":{"light":"github-light","dark":"github-dark-default"}}
  curl https://sepolia.ethereum.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
      -X POST \
      -H "Content-Type: application/json" \
      -d '{"jsonrpc":"2.0","method":"trace_replayBlockTransactions","params":["0x4C4B40",["trace"]],"id":1}'
  ```
</CodeGroup>


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.