Chainstack documentation

# Ethereum trace_call RPC method

Ethereum API method that executes a new message call and returns a number of possible traces.

Information

This method is available on Erigon when the trace namespace is enabled.

Learn how to deploy a node with the debug and trace API methods enabled.

Parameters:

  • object — the transaction call object with:
    • from — (optional) the string of the address the transaction is sent from.
    • to — the string of the address to which the transaction is directed.
    • gas — (optional) the integer of the gas provided for the transaction execution.
    • gasprice — (optional) the integer of the gas price used for each paid gas, encoded as hexadecimal.
    • value — (optional) the integer of the value sent with this transaction, encoded as hexadecimal.
    • data — (optional) the string of the hash of the method signature and encoded parameters; see the Ethereum Contract ABI (opens new window).

Returns:

  • array — the block traces that have the following object shape (all return types are hexadecimal representations of their data type unless otherwise stated):
  • Output — string.
  • TransactionHash — string.
  • vmtrace — the ParityVmTrace object with:
    • code — string.
    • operations — array of the ParityVmOperationTrace objects.
  • action — the trace object with:
    • traceaddress — array.
    • calltype — string.
    • includeintrace — boolean.
    • isprecomplied — boolean.
    • type — string.
    • creation method — string.
    • from — address.
    • to — address.
    • gas — quantity.
    • value — quantity.
    • input — data.
    • result — the ParityTraceResult object with:
      • gasused — quantity.
      • output — data.
      • address — address.
      • code — data.
    • subtraces — array.
    • author — address.
    • rewardtype — string.
    • error — string.
  • statechanges — array.

Example:

  • web3.py
  • cURL 
from web3 import Web3
node_url = "CHAINSTACK_NODE_URL"
web3 = Web3.HTTPProvider(node_url)

trace = web3.make_request('trace_call', [{
    "to": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
    "data": "0x000000000000000000000000000000000000000000000000003ae5d476b8d489"
    },["trace"], "latest"])
print(trace)