Starknet Get Contract Class Hash

POST

https://starknet.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Returns the class hash of the contract deployed at an address.

Body

application/json

jsonrpcstring2.0required

idinteger | stringrequired

methodstringstarknet_getClassHashAtrequired

paramsArray<object>required

Response

200OK

Successful JSON-RPC response

400Bad Request

Invalid JSON-RPC request or parameters

401Unauthorized

Missing or invalid API key

429Too Many Requests

Rate limit exceeded

500Internal Server Error

Node or upstream server error

Starknet Get Contract Class Hash

curl -X POST 'https://starknet.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "starknet_getClassHashAt",
    "params": [
      {
        "block_tag": "latest"
      },
      "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://starknet.nownodes.io/");
const result = await provider.send("starknet_getClassHashAt", [
  {
    "block_tag": "latest"
  },
  "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
]);
console.log(result);

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

uri = URI('https://starknet.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "starknet_getClassHashAt",
  "params": [
    {
      "block_tag": "latest"
    },
    "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
  ],
  "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://starknet.nownodes.io/"))
response = w3.provider.make_request("starknet_getClassHashAt", [
  {
    "block_tag": "latest"
  },
  "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
])
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "starknet_getClassHashAt",
  params: [
  {
    "block_tag": "latest"
  },
  "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
],
});

console.log(result);

const endpoint = "https://starknet.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: "starknet_getClassHashAt", params: [
  {
    "block_tag": "latest"
  },
  "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
], id: 1 });
console.log(result);

const response = await fetch('https://starknet.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": 1,
      "method": "starknet_getClassHashAt",
      "params": [
        {
          "block_tag": "latest"
        },
        "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "starknet_getClassHashAt",
  "params": [
    {
      "block_tag": "latest"
    },
    "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
  ]
}

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

require 'net/http'
require 'json'

uri = URI('https://starknet.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "starknet_getClassHashAt",
    "params": [
      {
        "block_tag": "latest"
      },
      "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
    ]
  }'

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": "starknet_getClassHashAt",
  "params": [
    {
      "block_tag": "latest"
    },
    "0x049E0cCb70e1F1684F43116e9E42e60D0f64d3D254Be8D8A1143dba43dEad733"
  ]
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x036078334509b514626504edc9fb252328d1a240e4e948bef8d0c08dff45927f"
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}

Documentation

How to migrate to NOWNodes

Starknet Get Contract Class Hash

Authorizations

Body

Response