getbestblockhash - Litecoin

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

This method returns the hash of the best (tip) block in the longest blockchain.

Parameters

• None

Request

cURL

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": "getbestblockhash",
    "params": [],
    "id": "getblock.io"
}'

JavaScript (Axios)

axios.js

import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "getbestblockhash",
    "params": [],
    "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));

Python

request.py

import requests
import json

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

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

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

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

Rust

main.rs

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": "getbestblockhash",
            "params": [],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

Response

{
    "result": "1b2a8a574ade97833ae8a7361d632fa02d44a6a2546076b4d5afced07f6c2137",
    "error": null,
    "id": "getblock.io"
}

Response Parameters

Field	Type	Description
result	string	The hash of the best block in the chain (64 character hex string).

Use Case

The getbestblockhash method is essential for:

• Getting the current chain tip

• Starting point for block traversal

• Chain reorganization detection

• Monitoring new blocks

• Synchronization verification

Error Handling

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

Integration Notes

The getbestblockhash method helps developers:

• Track the current chain tip

• Detect new blocks

• Build block notification systems

• Verify chain consistency

• Start blockchain traversal