eth_blockNumber - Monad

Example code for the eth_blockNumber JSON-RPC method. Complete guide on how to use eth_blockNumber JSON-RPC in GetBlock Web3 documentation.

This method returns the number of the most recent block.

Due to Monad's ~400ms block time, block numbers increase much faster than on Ethereum (~12 second blocks). Applications should account for this when implementing polling or confirmation tracking.

Parameters

• None

Request

cURL

curl --location --request POST 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
  "jsonrpc": "2.0",
  "method": "suix_getStakes",
  "params": ["0x9c76d5157eaa77c41a7bfda8db98a8e8080f7cb53b7313088ed085c73f866f21"],
  "id": "getblock.io"
}'

Axios

import axios from 'axios';

const data = JSON.stringify({
  "jsonrpc": "2.0",
  "method": "suix_getStakes",
  "params": ["0x9c76d5157eaa77c41a7bfda8db98a8e8080f7cb53b7313088ed085c73f866f21"],
  "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data)))
    .catch(error => console.log(error));

Request

import requests
import json

url = "https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
  "jsonrpc": "2.0",
  "method": "suix_getStakes",
  "params": ["0x9c76d5157eaa77c41a7bfda8db98a8e8080f7cb53b7313088ed085c73f866f21"],
  "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)

Rust

use reqwest::header;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::new();
    
    let response = client
        .post("https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/")
        .header(header::CONTENT_TYPE, "application/json")
        .body(r#"{
              "jsonrpc": "2.0",
              "method": "suix_getStakes",
              "params": ["0x9c76d5157eaa77c41a7bfda8db98a8e8080f7cb53b7313088ed085c73f866f21"],
              "id": "getblock.io"
            }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x1b4"
}

Response Parameters

Field	Type	Description
result	string	The current block number in hexadecimal format.

Use Case

The eth_blockNumber method is essential for:

• Monitoring blockchain height in real-time

• Synchronization status checks

• Building block explorers and dashboards

• Tracking transaction confirmations

• Implementing polling for new blocks

• High-frequency trading applications on Monad's fast block times

Error Handling

Status Code	Error Message	Cause
403	Forbidden	Missing or invalid ACCESS-TOKEN.

Web3 Integration

Ether.js

import { ethers } from "ethers";
const RPC_URL = "https://shared.us-east-1.getblock.io/<ACCESS_TOKEN>";
const provider = new ethers.JsonRpcProvider(RPC_URL);
async function fetchBlockNumberFromProvider() {
  try {
    // Call the method — this will resolve to a number (promise resolves to number)
     const result = await provider.send("eth_blockNumber", [],);
    console.log("Block number result:", result);
    return result;
  } catch (error) {
    console.error("Ethers Error fetching block number:", error);
    throw error;
  }
}

Viem

import { createPublicClient, http } from "viem";
import { hyperEvm } from "viem/chains";

// Create Viem client with GetBlock
const client = createPublicClient({
  chain: hyperEvm,
  transport: http(import.meta.env.MONAD_ACCESS_TOKEN),
});

// Using the method through Viem
async function Call() {
  try {
    // Method-specific Viem implementation
    const result = await client.request({
    "method": "eth_blockNumber",
    "params": [],
};
    return result;
  } catch (error) {
    console.error("Viem Error:", error);
    throw error;
  }
}