web3_sha3 - Somnia

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 of the given data on the Somnia network. Note: This is Keccak-256, not the standardized SHA3-256.

Parameters

Parameter	Type	Required	Description
data	string	Yes	Data to hash (hex encoded)

Request Example

cURL

cURL

curl -X POST https://go.getblock.io/<ACCESS-TOKEN>/ \
-H "Content-Type: application/json" \
-d '{
  "jsonrpc": "2.0",
  "id": "getblock.io",
  "method": "web3_sha3",
  "params": ["0x68656c6c6f"]
}'

JavaScript (Axios)

Python

Response Example

response.json

{
  "jsonrpc": "2.0",
  "id": "getblock.io",
  "result": "0x1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8"
}

Use Cases

• Compute event topic signatures

• Generate function selectors

• Verify hashes

• Data integrity checks

SDK Integration

Ethers.js

ethers-example.js

const { ethers } = require('ethers');
const hash = ethers.keccak256('0x68656c6c6f');
console.log(hash);