eth_blockNumber - Sonic

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 on Sonic. It is the primary method for reading the current chain height.

Parameters

This method does not accept any parameters.

Request

cURL

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "params": [],
    "id": "getblock.io"
}'

Axios

example.js

const axios = require('axios');

const response = await axios.post('https://go.getblock.io/<ACCESS-TOKEN>/', {
    jsonrpc: '2.0',
    method: 'eth_blockNumber',
    params: [],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

console.log(response.data.result);

Request

example.py

import requests

response = requests.post(
    'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'eth_blockNumber',
        'params': [],
        'id': 'getblock.io'
    }
)

print(response.json())

Rust

example.rs

use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "eth_blockNumber",
            "params": [],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

    println!("Result: {}", response["result"]);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x1e8480"
}

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	string	Hex-encoded number of the most recent block

Use Cases

• Chain Height: Read the current block height for a status display

• Confirmation Counts: Subtract a transaction's block number from the tip

• Sync Checks: Compare a local index height against the network

• Polling: Detect new blocks by watching the height change

Error Handling

Error Code	Message	Description
-32602	Invalid params	A parameter is missing or has the wrong type or format
-32603	Internal error	The node failed to process the request

Web3 Integration

Ethers.js

ethers-example.js

const { ethers } = require('ethers');

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

const blockNumber = await provider.getBlockNumber();
console.log(blockNumber);

Viem

viem-example.js

import { createPublicClient, http } from 'viem';
import { sonic } from 'viem/chains';

const client = createPublicClient({ chain: sonic, transport: http('https://go.getblock.io/<ACCESS-TOKEN>/') });

const blockNumber = await client.getBlockNumber();
console.log(blockNumber);