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Contents

trace_call RPC method

Parameters:

  1. Object - The transaction call object, should have this shape:

    from - (optional) String of the address the transaction is sent from.

    to - String of the address the transaction is directed to.

    gas - (optional) Integer of the gas provided for the transaction execution.

    gasPrice - (optional) Integer of the gasPrice used for each paid gas encoded as a hexadecimal.

    value - (optional) Integer of the value sent with this transaction encoded as a hexadecimal.

    data - (optional) String of the hash of the method signature and encoded parameters, see the Ethereum Contract ABI.

  2. Array - Type of trace, one or more of:

    vmTrace - To get a full trace of virtual machine's state during the execution of the given of given transaction, including for any subcalls.

    trace - To get the basic trace of the given transaction.

    stateDiff - To get information on altered Ethereum state due to execution of the given transaction.

  3. Quantity or Tag - Integer block number, or the string 'latest', 'earliest' or 'pending', see the default block parameter.

    Returns:

  1. Array - Block traces, which have the following object shape (all return types are hexadecimal representations of their data type unless otherwise stated):

    Output - String.

    TransactionHash - String of the transaction hash.

    VmTrace - ParityVmTrace Object, which has the following fields:

    Code - String.

    Operations - array of ParityVmOperationTrace objects.

    Action - ParityTrace Object, which has the following fields:

    TraceAddress - Array.

    CallType - String.

    IncludeInTrace - Boolean.

    IsPrecomplied - Boolean.

    Type - String.

    CreationMethod - String.

    From - Address.

    To - Address.

    Gas - Quantity.

    Value - Quantity.

    Input - Data.

    Result - ParityTraceResult object which has the following fields:

    GasUsed - Quantity

    Output - Data

    Address - Address

    Code - Data

    Subtraces - Array.

    Author - Address.

    RewardType - String.

    Error - String.

    StateChanges - Array.

Code Examples:

from web3 import HTTPProvider

client = HTTPProvider('http://sample-endpoint-name.network.quiknode.pro/token-goes-here/')
result = client.make_request('trace_call', [{
    "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
    "data": "0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"
    },["trace"], "latest"])
print(result)
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