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trace_call

Executes the given call and returns a number of possible traces for it.
The trace_call command allows users to execute a given transaction call while returning a number of likely traces for the call.

Parameters

  1. 1.
    Object - Call options, same as eth_call.
    • from: Address - (optional) 20 Bytes - The address the transaction is send from.
    • to: Address - (optional when creating new contract) 20 Bytes - The address the transaction is directed to.
    • gas: Quantity - (optional) Integer formatted as a hex string of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions.
    • gasPrice: Quantity - (optional) Integer formatted as a hex string of the gas price used for each paid gas.
    • value: Quantity - (optional) Integer formatted as a hex string of the value sent with this transaction.
    • data: Data - (optional) 4 byte hash of the method signature followed by encoded parameters. For details see Ethereum Contract ABI.
  2. 2.
    Array - Type of trace, one or more of: "vmTrace", "trace", "stateDiff".
  3. 3.
    Quantity or Tag - (optional) Integer of a block number, or the string 'earliest' or 'latest'.

Returns

  • Array - Block traces

Example Request and Result for trace_call

Request
curl https://eth-mainnet.blastapi.io/<project-id>
-X POST \
-H "Content-Type: application/json" \
-d '{"method":"trace_call",
"params":[{
"from": "0x6f1FB6EFDf50F34bFA3F2bC0E5576EdD71631638",
"to": "0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e",
"value": "0x0",
"data": "0xa67a6a45000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000"},
["trace"]],
"id":1,
"jsonrpc":"2.0"}'
Result
{
"jsonrpc": "2.0",
"id": 1,
"result": {
"output": "0x",
"stateDiff": null,
"trace": [{
"action": {
"from": "0x6f1fb6efdf50f34bfa3f2bc0e5576edd71631638",
"callType": "call",
"gas": "0x2fa9d78",
"input": "0xa67a6a45000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000",
"to": "0x1e0447b19bb6ecfdae1e4ae1694b0c3659614e4e",
"value": "0x0"
},
"error": "Reverted",
"result": null,
"subtraces": 0,
"traceAddress": [],
"type": "call"
}],
"vmTrace": null
}
}