web3_sha3 - Celo

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 the Keccak-256 hash of the given data on Celo. This is useful for hashing data for signatures, event topic generation, and other cryptographic operations.

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"
}

Response Definition

Field	Type	Description
result	string	Keccak-256 hash

Use Cases

• Generate event signatures

• Hash data for verification

• Create function selectors

• Cryptographic operations

Error Handling

Error Code	Description
-32602	Invalid params
-32603	Internal error

SDK Integration

Ethers.js

ethers.js

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

const hash = ethers.keccak256(ethers.toUtf8Bytes('hello'));
console.log(hash);