Trace a read-only contract call

POST

https://lukso.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Changed. The block parameter is optional. If it is omitted or null, the call is traced against the latest block; a tracer config can still be passed as the third parameter ([call, null, {...}]).

Invokes debug_traceCall on LUKSO Mainnet and returns its result.

Body

application/json

jsonrpcstring

JSON-RPC protocol version. Use 2.0.

idinteger

Identifier used to correlate the request with its response.

methodstring

JSON-RPC method to invoke.

paramsArray<object | string | object>

Ordered parameters accepted by the JSON-RPC method.

Show child attributes

Any of

tostring

Value of to.

datastring

Value of data.

string

Response

200OK

Successful JSON-RPC response.

Trace a read-only contract call

curl -X POST 'https://lukso.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "debug_traceCall",
    "params": [
      {
        "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
        "data": "0x"
      },
      "latest",
      {}
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://lukso.nownodes.io/");
const result = await provider.send("debug_traceCall", [
  {
    "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
    "data": "0x"
  },
  "latest",
  {}
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://lukso.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "debug_traceCall",
  "params": [
    {
      "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
      "data": "0x"
    },
    "latest",
    {}
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://lukso.nownodes.io/"))
response = w3.provider.make_request("debug_traceCall", [
  {
    "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
    "data": "0x"
  },
  "latest",
  {}
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://lukso.nownodes.io/"),
});

const result = await client.request({
  method: "debug_traceCall",
  params: [
  {
    "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
    "data": "0x"
  },
  "latest",
  {}
],
});

console.log(result);

const endpoint = "https://lukso.nownodes.io/";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "debug_traceCall", params: [
  {
    "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
    "data": "0x"
  },
  "latest",
  {}
], id: 1 });
console.log(result);

const response = await fetch('https://lukso.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": 1,
      "method": "debug_traceCall",
      "params": [
        {
          "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
          "data": "0x"
        },
        "latest",
        {}
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "debug_traceCall",
  "params": [
    {
      "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
      "data": "0x"
    },
    "latest",
    {}
  ]
}

response = requests.post('https://lukso.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://lukso.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "debug_traceCall",
    "params": [
      {
        "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
        "data": "0x"
      },
      "latest",
      {}
    ]
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "debug_traceCall",
  "params": [
    {
      "to": "0x78b28c90b553c9445e37c0e13edb78402ce69d42",
      "data": "0x"
    },
    "latest",
    {}
  ]
}

200

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "gas": 21000,
    "failed": false,
    "returnValue": "0x",
    "structLogs": []
  }
}