trace_call

Simulates a call and returns the trace in the OpenEthereum/Parity format, without broadcasting a transaction. Similar to debug_traceCall but returns the OpenEthereum trace shape.

Parameters

• transaction: [required] Transaction call object (from, to, gas, gasPrice, value, data).
• traceTypes: [required] Array of trace types to return. Valid values: "trace", "stateDiff". ("vmTrace" is not supported on rpc.linea.build.)
• blockParameter: [required] Hexadecimal block number, or latest.

Returns

Object with fields corresponding to the requested trace types:

• output: Hex-encoded call return data.
• trace: Array of call trace objects (if "trace" was requested).
• stateDiff: State changes caused by the call (if "stateDiff" was requested).

Example

Request

curl https://rpc.linea.build \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "trace_call",
    "params": [
      {
        "to": "0x176211869ca2b568f2a7d4ee941e073a821ee1ff",
        "data": "0x70a08231000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045"
      },
      ["trace"],
      "latest"
    ],
    "id": 1
  }'

Response (abbreviated)

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "output": "0x000000000000000000000000000000000000000000000000000000000026009c",
    "stateDiff": null,
    "trace": [
      {
        "action": {
          "callType": "call",
          "from": "0x0000000000000000000000000000000000000000",
          "to": "0x176211869ca2b568f2a7d4ee941e073a821ee1ff",
          "gas": "0xffac48",
          "input": "0x70a08231000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045",
          "value": "0x0"
        },
        "result": {
          "gasUsed": "0x25fe",
          "output": "0x000000000000000000000000000000000000000000000000000000000026009c"
        },
        "subtraces": 1,
        "traceAddress": [],
        "type": "call"
      }
    ]
  }
}