Get cryptographic state proof

POST

https://zil.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Retrieves a cryptographic proof (Merkle proof) for a specific part of the blockchain state, such as a smart contract state or account state. Useful for verifying data integrity.

Body

application/json

jsonrpcstringrequired

JSON-RPC version

methodstringrequired

Method name

idintegerrequired

Request ID

paramsArray<string | Array<string>>required

Parameters to specify the target for the state proof (e.g., contract address and keys)

Show child attributes

One of

string

Array<string>

Response

200OK

State proof retrieved successfully

400Bad Request

Invalid request

500Internal Server Error

Server error

Get cryptographic state proof

curl -X POST 'https://zil.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "GetStateProof",
    "id": 1,
    "params": [
      "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
      "balances",
      [
        "0xabcdef1234567890abcdef1234567890abcdef12"
      ]
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://zil.nownodes.io/");
const result = await provider.send("GetStateProof", [
  "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
  "balances",
  [
    "0xabcdef1234567890abcdef1234567890abcdef12"
  ]
]);
console.log(result);

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

uri = URI('https://zil.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "GetStateProof",
  "params": [
    "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
    "balances",
    [
      "0xabcdef1234567890abcdef1234567890abcdef12"
    ]
  ],
  "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://zil.nownodes.io/"))
response = w3.provider.make_request("GetStateProof", [
  "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
  "balances",
  [
    "0xabcdef1234567890abcdef1234567890abcdef12"
  ]
])
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "GetStateProof",
  params: [
  "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
  "balances",
  [
    "0xabcdef1234567890abcdef1234567890abcdef12"
  ]
],
});

console.log(result);

const endpoint = "https://zil.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: "GetStateProof", params: [
  "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
  "balances",
  [
    "0xabcdef1234567890abcdef1234567890abcdef12"
  ]
], id: 1 });
console.log(result);

const response = await fetch('https://zil.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "GetStateProof",
      "id": 1,
      "params": [
        "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
        "balances",
        [
          "0xabcdef1234567890abcdef1234567890abcdef12"
        ]
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "GetStateProof",
  "id": 1,
  "params": [
    "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
    "balances",
    [
      "0xabcdef1234567890abcdef1234567890abcdef12"
    ]
  ]
}

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

require 'net/http'
require 'json'

uri = URI('https://zil.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "GetStateProof",
    "id": 1,
    "params": [
      "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
      "balances",
      [
        "0xabcdef1234567890abcdef1234567890abcdef12"
      ]
    ]
  }'

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",
  "method": "GetStateProof",
  "id": 1,
  "params": [
    "zil1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszq",
    "balances",
    [
      "0xabcdef1234567890abcdef1234567890abcdef12"
    ]
  ]
}

200

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": {
    "proof": [
      "0xabcdef1234567890abcdef1234567890abcdef12"
    ],
    "rootHash": "0x1234abcd5678ef901234abcd5678ef901234abcd5678ef901234abcd5678ef90",
    "leafHash": "0x5678abcd1234ef905678abcd1234ef905678abcd1234ef905678abcd1234ef90"
  }
}

Documentation

How to migrate to NOWNodes

Get cryptographic state proof

Authorizations

Body

Response