web3_sha3 - Tron

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

This method returns the Keccak-256 hash of the given data. It is used to compute function selectors and event topic hashes.

Parameters

Parameter	Type	Required	Description
data	string	Yes	The data to hash, hex-encoded

Request

cURL

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

Axios

example.js

const axios = require('axios');

const response = await axios.post('https://go.getblock.io/<ACCESS-TOKEN>/jsonrpc', {
    jsonrpc: '2.0',
    method: 'web3_sha3',
    params: ["0x68656c6c6f20776f726c64"],
    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>/jsonrpc',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'web3_sha3',
        'params': ["0x68656c6c6f20776f726c64"],
        '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>/jsonrpc")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "web3_sha3",
            "params": ["0x68656c6c6f20776f726c64"],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

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

Response

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

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	string	Keccak-256 hash of the input data

Use Cases

• Function Selectors: Compute the 4-byte selector for a function signature

• Event Topics: Compute the topic hash for an event signature

• Data Integrity: Hash data for verification

• Tooling: Provide Keccak-256 hashing to Ethereum-style tools

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