debug_traceBlock 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

block

string

REQUIRED

The RLP encoded block

object

array

REQUIRED

The tracer object with the following fields:

tracer

string

The type of tracer. It could be callTracer or prestateTracer

callTracer

The calltracer keeps track of all call frames, including depth 0 calls, that are made during a transaction

prestateTracer

The prestateTracer replays the transaction and tracks every part of state that occured during the transaction

tracerConfig

object

The object to specify the configurations of the tracer

onlyTopCall

boolean

When set to true, this will only trace the primary (top-level) call and not any sub-calls. It eliminates the additional processing for each call frame

diffMode

boolean

When set to true, diff mode returns the differences between the transaction's pre and post-state. The result object will contain a pre and a post object.

Returns

result

A result array with the following fields:

type

The type of the call

from

The address the transaction is sent from

to

The address the transaction is directed to

value

The integer of the value sent with this transaction

gas

The integer of the gas provided for the transaction execution

gasUsed

The integer of the gas used

input

The data given at the time of input

output

The data which is returned as an output

calls

A list of sub-calls

Request

curl https://docs-demo.quiknode.pro/ \
 -X POST \
 -H "Content-Type: application/json" \
 --data '{"method":"debug_traceBlock","params":["RLP_ENCODED_BLOCK", {"tracer": "callTracer"}],"id":1,"jsonrpc":"2.0"}'

require 'eth'

client = Eth::Client.create 'https://docs-demo.quiknode.pro/'
payload = {
    "jsonrpc": "2.0",
    "method": "debug_traceBlock",
    "params": ["RLP_ENCODED_BLOCK", {"tracer": "callTracer"}],
    "id": "1"
}

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

const ethers = require('ethers');
(async () => {
	const provider = new ethers.JsonRpcProvider('https://docs-demo.quiknode.pro/')
	const filterId = await provider.send('debug_traceBlock', [
		'RLP_ENCODED_BLOCK',
		{ "tracer": "callTracer" },
	])
	console.log(filterId)
})()

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

var raw = JSON.stringify({
  "method": "debug_traceBlock",
  "params": ["RLP_ENCODED_BLOCK", {"tracer": "callTracer"}],
  "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": "debug_traceBlock",
  "params": ["RLP_ENCODED_BLOCK", {"tracer": "callTracer"}],
  "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/")

http = Net::HTTP.new(url.host, url.port);
request = Net::HTTP::Post.new(url)
request["Content-Type"] = "application/json"
request.body = JSON.dump({
  "method": "debug_traceBlock",
  "params": ["RLP_ENCODED_BLOCK", {"tracer": "callTracer"}],
  "id": 1,
  "jsonrpc": "2.0"
})

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

from web3 import Web3, HTTPProvider
provider = Web3.HTTPProvider("https://docs-demo.quiknode.pro/")
result = provider.make_request('debug_traceBlock', ["RLP_ENCODED_BLOCK", {"tracer": "callTracer"}])
print(result)

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": [
    {
      "type": "CALL",
      "from": "0x5A0b54D5dc17e0AadC383d2db43B0a0D3E029c4c",
      "to": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
      "value": "0x0",
      "gas": "0x15f90",
      "gasUsed": "0xd880",
      "input": "0xa9059cbb000000000000000000000000c6cde7c39eb2f0f0095f41570af89efc2c1ea828000000000000000000000000000000000000000000000000000000003b9aca00",
      "output": "0x0000000000000000000000000000000000000000000000000000000000000001",
      "calls": [
        {
          "type": "STATICCALL",
          "from": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
          "to": "0xb46d4e66c0445e3b1a7df818f5fc5e9aedb90da2",
          "gas": "0xbf83",
          "gasUsed": "0x383",
          "input": "0x70a082310000000000000000000000005a0b54d5dc17e0aadc383d2db43b0a0d3e029c4c",
          "output": "0x00000000000000000000000000000000000000000000000000000002540be400"
        }
      ]
    },
    {
      "type": "CALL",
      "from": "0x8894e0a0c962cb723c1976a4421c95949be2d4e3",
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "value": "0x0",
      "gas": "0x30d40",
      "gasUsed": "0x10a88",
      "input": "0x23b872dd0000000000000000000000008894e0a0c962cb723c1976a4421c95949be2d4e3000000000000000000000000a478c2975ab1ea89e8196811f51a7b7ade33eb11000000000000000000000000000000000000000000000054b419212a0b334000",
      "output": "0x0000000000000000000000000000000000000000000000000000000000000001",
      "calls": []
    }
  ]
}

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