web3_sha3 - Mantle

Example code for the web3_sha3 JSON-RPC method. Complete guide on how to use web3_sha3 JSON-RPC in GetBlock Web3 documentation.

This method returns the Keccak-256 hash (not the standardized SHA3-256) of the given data.

Parameters

Parameter

Type

Description

data

string

Data to hash (hex encoded)

Request

curl

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "web3_sha3",
    "params": ["0x68656c6c6f20776f726c64"],
    "id": "getblock.io"
}'

example.js

import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "web3_sha3",
    "params": ["0x68656c6c6f20776f726c64"],
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.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));

example.py

import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "web3_sha3",
    "params": ["0x68656c6c6f20776f726c64"],
    "id": "getblock.io"
})

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

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

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://go.getblock.io/<ACCESS-TOKEN>/")
        .header(header::CONTENT_TYPE, "application/json")
        .body(r#"{
            "jsonrpc": "2.0",
            "method": "web3_sha3",
            "params": ["0x68656c6c6f20776f726c64"],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

Response

response.json

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad"
}

Response Parameters

Field

Type

Description

result

string

Keccak-256 hash of the given data

Use Case

The web3_sha3 method is essential for:

Data hashing
Signature verification
Address derivation
Smart contract interactions
Cryptographic operations

Error Handling

Status Code

Error Message

Cause

403

Forbidden

Missing or invalid ACCESS-TOKEN

-32602

Invalid params

Invalid hex data

Web3 Integration

ethers-example.js

import { ethers } from 'ethers';

// Ethers has built-in keccak256
const hash = ethers.keccak256('0x68656c6c6f20776f726c64');
console.log('Keccak256 Hash:', hash);

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