Chainstack documentation

# Ethereum debug_traceCall RPC method

Ethereum API method that lets you run eth_call on top of a block.

Information

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 gasPrice 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).
    • quantity or tag — the integer block number, or the string with:
      • latest — the latest block that is to be validated. The Beacon Chain may reorg and the latest block can become orphaned.
      • earliest — the genesis block.
      • pending — the pending state and transactions block.

Returns:

  • array — the block traces, which have the following object shape (all return types are hexadecimal representations of their data type unless otherwise stated):
  • results — the trace object with:
    • failed — the boolean transaction result: true if it failed, false if it was successful.
    • gas — the quantity of the gas provided for the call, encoded as hexadecimal.
    • returnvalue — data.
    • structlogs — array with:
      • entries — array.
      • storagesbydepth — array.

Example:

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

debug = web3.make_request('debug_traceCall', [{
    "to": "0x690B9A9E9aa1C9dB991C7721a92d351Db4FaC990"
    }, "latest"])
print(debug)