POST
/
efb0a5eccd2caa5135eb54eba6f7f300
Execute a call and retrieve a detailed execution trace
curl --request POST \
  --url https://optimism-mainnet.core.chainstack.com/efb0a5eccd2caa5135eb54eba6f7f300 \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "debug_traceCall",
  "id": 1,
  "params": [
    {
      "to": "0x94b008aA00579c1307B0EF2c499aD98a8ce58e58",
      "gasPrice": "0x7896e72a",
      "data": "0x70a08231000000000000000000000000f977814e90da44bfa03b6295a0616a897441acec"
    },
    "latest"
  ]
}'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": {
    "structLogs": [
      {}
    ],
    "gas": 123,
    "returnValue": "<string>",
    "gasUsed": 123,
    "failed": true
  }
}

Executes a call and retrieves a detailed execution trace of the call, similar to a transaction but without creating a transaction on the blockchain. This method is crucial for developers and analysts who need to understand the execution flow of a call, including all the operations (opcodes) executed, gas usage, and the call’s outcome.

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Request

To use debug_traceCall, send a POST request with a JSON RPC call in the body.

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Parameters

  • from (string): The address the call is sent from.
  • to (string): The address the call is directed to.
  • gasPrice (string): The gas price for the call.
  • data (string): The data sent along with the call.

​
Response

The response includes a detailed execution trace of the call, providing insights into each step of the call’s execution.

  • result (object): The detailed execution trace, including:
    • structLogs (array): An array of execution steps (opcodes) taken by the call.
    • gas (integer): The gas provided by the call.
    • returnValue (string): The return value of the call, if any.
    • gasUsed (integer): The total gas used by the call.
    • failed (boolean): Indicates whether the call failed.

​
Use case

The debug_traceCall method is essential for:

  • Developers debugging smart contract interactions.
  • Analysts conducting forensic analysis of calls.
  • Tools and services that provide insights into Ethereum Virtual Machine (EVM) execution.

Body

application/json

Response

200 - application/json

Detailed execution trace of the call

The response is of type object.