Traces a call transaction.

PARAMETERS

Transaction - (required) A transaction object with the following fields:
- from - (optional) The address the transaction is sent from.
- to - (required) The address the transaction is directed to.
- gas - (optional) The gas provided for the transaction execution.
- gasPrice - (optional) The gas price used for each paid gas.
- value - (optional) The value sent with the given transaction.
- data - (optional) Hash of the method signature and encoded parameters.
Block Number - (required) A block number, or one of the following block tags:
- pending - A sample next block built by the client on top of latest and containing the set of transactions usually taken from local mempool. Intuitively, you can think of these as blocks that have not been mined yet.
- latest - The most recent block in the canonical chain observed by the client, this block may be re-orged out of the canonical chain even under healthy/normal conditions.
- safe - The most recent crypto-economically secure block, cannot be re-orged outside of manual intervention driven by community coordination. Intuitively, this block is “unlikely” to be re-orged. Only available on Ethereum Goerli.
- finalized - The most recent crypto-economically secure block, that has been accepted by >2/3 of validators. Cannot be re-orged outside of manual intervention driven by community coordination. Intuitively, this block is very unlikely to be re-orged. Only available on Ethereum Goerli.
- earliest - The lowest numbered block the client has available. Intuitively, you can think of this as the first block created.
Tracer - (optional) A tracer object. See tracer.

REQUEST

{
  "jsonrpc": "2.0",
  "method": "debug_traceCall",
  "params": [
    {
      "from": "0x871f1181AA63c988325539cF4b502E092595B50E",
      "to": "0x5300000000000000000000000000000000000002",
      "data": "0x"
    },
    "0x2fa00",
    {
      "tracer": "callTracer",
      "tracerConfig": {
        "onlyTopCall": false,
        "withLog": true
      }
    }
  ],
  "id": 1
}

RESPONSE

Result - The callTracer tracks all the call frames executed during a transaction, including depth 0. The result will be a nested list of call frames, resembling how EVM works. They form a tree with the top-level call at root and sub-calls as children of the higher levels. Each call frame has the following fields:

type - The type of the transaction.
from - The Ethereum address that initiated the transaction.
to - The Ethereum address that received the transaction.
value - The amount of Ether sent with the transaction.
gas - The maximum amount of gas that can be used for the transaction.
gasUsed - The amount of gas actually used for the transaction.
input - The input data for the transaction.
output - The output data from the transaction.
calls - An array of calls made during the transaction.

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "type": "CALL",
    "from": "0x871f1181aa63c988325539cf4b502e092595b50e",
    "to": "0x5300000000000000000000000000000000000002",
    "value": "0x0",
    "gas": "0x7fffffffffffadf7",
    "gasUsed": "0x45",
    "input": "0x",
    "error": "execution reverted"
  }
}

200Trace object

400Bad Request. The request could not be understood by the server due to malformed syntax.