trace_call RPC Method

Please note that this RPC method is available to all users on the Build plan and higher. If you are using the Free plan, you will need to upgrade to utilize this method. See our pricing for more information.

Parameters

object

array

The transaction call object which contains the following fields:

from

string

The string of the address the transaction is sent from

to

string

REQUIRED

The string of the address to the transaction is directed to

gas

integer

The integer of the gas provided for the transaction execution

gasPrice

integer

The integer of the gasPrice used for each paid gas encoded as hexadecimal

value

integer

The integer of the value sent with this transaction encoded as hexadecimal

data

string

The string of the hash of the method signature and encoded parameters, see the Ethereum Contract ABI

array

array

REQUIRED

The type of trace, which can be one of the following:

vmTrace

string

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

trace

string

To get the basic trace of the given transaction

stateDiff

string

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

blockNumber

string

The block number as a string in hexadecimal format or tags. The supported tag values include earliest for the earliest/genesis block, latest for the latest mined block, pending for the pending state/transactions, safe for the most recent secure block, and finalized for the most recent secure block accepted by more than 2/3 of validators. safe and finalized are only supported on Ethereum and Gnosis

Returns

array

The block traces, which have the following fields (please note that all return types are hexadecimal representations of their data type unless otherwise stated):

output

The data which is returned as an output encoded in hexadecimal format

stateDiff

It returns the information on altered Ethereum state due to execution of the given transaction

trace

It is used to retrieve the basic trace of the given information

action

The action to be performed on the receiver id:

from

The address of the sender

callType

The type of method such as call, delegatecall

gas

The gas provided by the sender, encoded as hexadecimal

input

The data sent along with the transaction

to

The address of the receiver

value

The integer of the value sent with this transaction, encoded as hexadecimal

result

The integer of the gas price used encoded as hexadecimal

gasUsed

The amount of gas used by this specific transaction alone

output

The value returned by the contract call, and it only contains the actual value sent by the RETURN method. If the RETURN method was not executed, the output is empty bytes

subtraces

The traces of contract calls made by the transaction

traceAddress

The list of addresses where the call executed, the address of the parents and the order of the current sub call

type

The value of the method such as call or create

vmTrace

It is used to get a full trace of the virtual machine's state during the execution of the given transaction, including for any sub-calls

Request

curl https://docs-demo.quiknode.pro/ \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{"method":"trace_call","params":[{"from":null,"to":"0x6b175474e89094c44da98b954eedeac495271d0f","data":"0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"},["trace"], "latest"],"id":1,"jsonrpc":"2.0"}'

require 'eth'

client = Eth::Client.create 'https://docs-demo.quiknode.pro/'
payload = {
    "jsonrpc": "2.0",
    "method": "trace_call",
    "params": [{"from":nil,"to":"0x6b175474e89094c44da98b954eedeac495271d0f","data":"0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"},["trace"], "latest"],
    "id": "1"
}

response = client.send(payload.to_json)
puts response

import { ethers } from "ethers";
(async () => {
  const provider = new ethers.JsonRpcProvider("https://docs-demo.quiknode.pro/");
  const response = await provider.send("trace_call", [
    {
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "data":
        "0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE",
    },
    ["trace"],
    "latest",
  ]);
  console.log(response);
})();

var myHeaders = new Headers();
myHeaders.append("Content-Type", "application/json");

var raw = JSON.stringify({
  "method": "trace_call",
  "params": [
    {
      "from": null,
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "data": "0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"
    },
    [
      "trace"
    ],
    "latest"
  ],
  "id": 1,
  "jsonrpc": "2.0"
});

var requestOptions = {
  method: 'POST',
  headers: myHeaders,
  body: raw,
  redirect: 'follow'
};

fetch("https://docs-demo.quiknode.pro/", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

import requests
import json

url = "https://docs-demo.quiknode.pro/"

payload = json.dumps({
  "method": "trace_call",
  "params": [
    {
      "from": None,
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "data": "0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"
    },
    [
      "trace"
    ],
    "latest"
  ],
  "id": 1,
  "jsonrpc": "2.0"
})
headers = {
  'Content-Type': 'application/json'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

require "uri"
require "json"
require "net/http"

url = URI("https://docs-demo.quiknode.pro/")

https = Net::HTTP.new(url.host, url.port)
https.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = "application/json"
request.body = JSON.dump({
  "method": "trace_call",
  "params": [
    {
      "from": nil,
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "data": "0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"
    },
    [
      "trace"
    ],
    "latest"
  ],
  "id": 1,
  "jsonrpc": "2.0"
})

response = https.request(request)
puts response.read_body

from web3 import HTTPProvider

client = HTTPProvider('https://docs-demo.quiknode.pro/')
result = client.make_request('trace_call', [{
    "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
    "data": "0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"
    },["trace"], "latest"])
print(result)

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "output": "0x0000000000000000000000000000000000000000000000000858898f93629000",
    "stateDiff": null,
    "trace": [
      {
        "action": {
          "from": "0x0000000000000000000000000000000000000000",
          "callType": "call",
          "gas": "0x8000000041905749",
          "input": "0x70a082310000000000000000000000006e0d01a76c3cf4288372a29124a26d4353ee51be",
          "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "value": "0x0"
        },
        "result": {
          "gasUsed": "0xa2a",
          "output": "0x0000000000000000000000000000000000000000000000000858898f93629000"
        },
        "subtraces": 0,
        "traceAddress": [],
        "type": "call"
      }
    ],
    "vmTrace": null
  }
}

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