Get the number of uncle blocks by block number

POST

https://eth-sepolia.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Executes the eth_getUncleCountByBlockNumber JSON-RPC method on Ethereum through NOWNodes.

Body

application/json

Get the number of uncle blocks by block number

Request payload for Get the number of uncle blocks by block number.

jsonrpcstringrequired

JSON-RPC protocol version.

methodstringrequired

JSON-RPC method name.

paramsArray<string>required

An array containing the block number as a hex string.

idintegerrequired

Client-provided request identifier echoed in the response.

Response

200OK

Number of uncle blocks in the block

401Unauthorized

Unauthorized: API key is present but rejected by the NOWNodes gateway.

405Method Not Allowed

Method Not Allowed. Returned by the NOWNodes gateway for malformed or unsupported gateway-level requests.

422Unprocessable Entity

Missing API key. The NOWNodes gateway returns plain text for this error.

500Internal Server Error

Upstream node or gateway error.

Get the number of uncle blocks by block number

curl -X POST 'https://eth-sepolia.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getUncleCountByBlockNumber",
    "params": [
      "0x10d4f"
    ],
    "id": 1
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://eth-sepolia.nownodes.io/");
const result = await provider.send("eth_getUncleCountByBlockNumber", [
  "0x10d4f"
]);
console.log(result);

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

uri = URI('https://eth-sepolia.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockNumber",
  "params": [
    "0x10d4f"
  ],
  "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://eth-sepolia.nownodes.io/"))
response = w3.provider.make_request("eth_getUncleCountByBlockNumber", [
  "0x10d4f"
])
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "eth_getUncleCountByBlockNumber",
  params: [
  "0x10d4f"
],
});

console.log(result);

const endpoint = "https://eth-sepolia.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: "eth_getUncleCountByBlockNumber", params: [
  "0x10d4f"
], id: 1 });
console.log(result);

const response = await fetch('https://eth-sepolia.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "eth_getUncleCountByBlockNumber",
      "params": [
        "0x10d4f"
      ],
      "id": 1
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockNumber",
  "params": [
    "0x10d4f"
  ],
  "id": 1
}

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

require 'net/http'
require 'json'

uri = URI('https://eth-sepolia.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "eth_getUncleCountByBlockNumber",
    "params": [
      "0x10d4f"
    ],
    "id": 1
  }'

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": "eth_getUncleCountByBlockNumber",
  "params": [
    "0x10d4f"
  ],
  "id": 1
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x0"
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "invalid argument 0: hex string without 0x prefix"
  }
}

Unknown API_key

Method Not Allowed

Missing API_key

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "invalid argument 0: hex string without 0x prefix"
  }
}

Documentation

How to migrate to NOWNodes

Get the number of uncle blocks by block number

Authorizations

Body

Response