trace_call

Executes a new message call and returns a number of possible traces.

This method will use 80 Compute Units.

---

Parameters

blockNumber - String - Required - 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

Returns

object - object -The transaction trace result object

• output - string - The data returned as output encoded in hexadecimal format

• stateDiff - object - The altered Ethereum 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

// Result
{
    "jsonrpc": "2.0",
    "id": 1,
    "result": {
      "output": "0x0000000000000000000000000000000000000000000000000000000000000001",
      "stateDiff": null,
      "trace": [
        {
          "type": "call",
          "action": {
            "from": "0x786d1ecc7ad626f48d6d95ccb2c0500e52e4a15b",
            "callType": "call",
            "gas": "0x2fa9c18",
            "input": "0xa9059cbb0000000000000000000000009406c483929bac16a41efae8665d8dab68c33eea0000000000000000000000000000000000000000000000000000000002fa2d30",
            "to": "0x20c0000000000000000000000000000000000000",
            "value": "0x0"
          },
          "result": {
            "gasUsed": "0x8a2e",
            "output": "0x0000000000000000000000000000000000000000000000000000000000000001"
          },
          "subtraces": 0,
          "traceAddress": []
        }
      ],
      "vmTrace": null
    }
  }

testnet

curl https://testnet.tempo.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"trace_call","params":[{"from":"0x786d1ecc7ad626f48d6d95ccb2c0500e52e4a15b","to":"0x20c0000000000000000000000000000000000000","data":"0xa9059cbb000000000000
  0000000000009406c483929bac16a41efae8665d8dab68c33eea0000000000000000000000000000000000000000000000000000000002fa2d30"},["trace"],"latest"],"id":1}'