Trace a read-only call

POST

https://linea.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, {...}]).

Executes a call against the selected block without broadcasting a transaction and returns an execution trace.

Body

application/json

JSON-RPC request envelope.

jsonrpcstring2.0required

JSON-RPC protocol version.

methodstringdebug_traceCallrequired

JSON-RPC method name.

paramsArray<object | string>required

Three parameters: call object, block identifier, and trace configuration.

Show child attributes

Call object, block identifier, or trace options.

One of

tostring

Destination address, or null for contract creation.

fromstring

Address initiating the transaction or call.

datastring

Hex-encoded call data or log data.

tracerstring

Tracer implementation, such as callTracer.

timeoutstring

Maximum trace execution time.

Block tag, number, or hash.

string

idintegerrequired

Identifier echoed in the response.

Response

200OK

JSON-RPC response.

Trace a read-only call

curl -X POST 'https://linea.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "debug_traceCall",
    "params": [
      {
        "to": "0x0000000000000000000000000000000000000000",
        "data": "0x"
      },
      "latest",
      {
        "tracer": "callTracer"
      }
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://linea.nownodes.io/");
const result = await provider.send("debug_traceCall", [
  {
    "to": "0x0000000000000000000000000000000000000000",
    "data": "0x"
  },
  "latest",
  {
    "tracer": "callTracer"
  }
]);
console.log(result);

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

uri = URI('https://linea.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "debug_traceCall",
  "params": [
    {
      "to": "0x0000000000000000000000000000000000000000",
      "data": "0x"
    },
    "latest",
    {
      "tracer": "callTracer"
    }
  ],
  "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://linea.nownodes.io/"))
response = w3.provider.make_request("debug_traceCall", [
  {
    "to": "0x0000000000000000000000000000000000000000",
    "data": "0x"
  },
  "latest",
  {
    "tracer": "callTracer"
  }
])
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "debug_traceCall",
  params: [
  {
    "to": "0x0000000000000000000000000000000000000000",
    "data": "0x"
  },
  "latest",
  {
    "tracer": "callTracer"
  }
],
});

console.log(result);

const endpoint = "https://linea.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": "0x0000000000000000000000000000000000000000",
    "data": "0x"
  },
  "latest",
  {
    "tracer": "callTracer"
  }
], id: 1 });
console.log(result);

const response = await fetch('https://linea.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": 1,
      "method": "debug_traceCall",
      "params": [
        {
          "to": "0x0000000000000000000000000000000000000000",
          "data": "0x"
        },
        "latest",
        {
          "tracer": "callTracer"
        }
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "debug_traceCall",
  "params": [
    {
      "to": "0x0000000000000000000000000000000000000000",
      "data": "0x"
    },
    "latest",
    {
      "tracer": "callTracer"
    }
  ]
}

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

require 'net/http'
require 'json'

uri = URI('https://linea.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": "0x0000000000000000000000000000000000000000",
        "data": "0x"
      },
      "latest",
      {
        "tracer": "callTracer"
      }
    ]
  }'

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": "0x0000000000000000000000000000000000000000",
      "data": "0x"
    },
    "latest",
    {
      "tracer": "callTracer"
    }
  ]
}

200

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "from": "0x0000000000000000000000000000000000000000",
    "gas": "0x2faf080",
    "gasUsed": "0x5208",
    "to": "0x0000000000000000000000000000000000000000",
    "input": "0x",
    "value": "0x0",
    "type": "CALL"
  }
}