@ethersproject/keccak256

What is @ethersproject/keccak256?

@ethersproject/keccak256 is a part of the ethers.js library, which is a complete and compact library for interacting with the Ethereum blockchain. The keccak256 module specifically provides functionality for hashing data using the Keccak-256 algorithm, which is a cryptographic hash function used extensively in Ethereum.

What are @ethersproject/keccak256's main functionalities?

Hashing a string

This feature allows you to hash a string using the Keccak-256 algorithm. The `toUtf8Bytes` function is used to convert the string into a byte array, which is then hashed.

const { keccak256 } = require('@ethersproject/keccak256');
const { toUtf8Bytes } = require('@ethersproject/strings');

const data = 'Hello, world!';
const hash = keccak256(toUtf8Bytes(data));
console.log(hash);

Hashing a byte array

This feature allows you to hash a byte array directly using the Keccak-256 algorithm. This is useful for hashing binary data.

const { keccak256 } = require('@ethersproject/keccak256');

const data = new Uint8Array([1, 2, 3, 4, 5]);
const hash = keccak256(data);
console.log(hash);

Hashing a hex string

This feature allows you to hash a hex string using the Keccak-256 algorithm. The `hexlify` function is used to ensure the data is in the correct format.

const { keccak256 } = require('@ethersproject/keccak256');
const { hexlify } = require('@ethersproject/bytes');

const data = '0x123456';
const hash = keccak256(hexlify(data));
console.log(hash);

Other packages similar to @ethersproject/keccak256

js-sha3

The js-sha3 package provides a simple and fast implementation of the Keccak (SHA-3) hash functions. It supports various output formats and is highly optimized for performance. Compared to @ethersproject/keccak256, js-sha3 is more focused on providing a comprehensive suite of SHA-3 hashing functions, while @ethersproject/keccak256 is part of a broader library aimed at Ethereum development.

keccak

The keccak package is a pure JavaScript implementation of the Keccak (SHA-3) hash function. It is designed to be lightweight and easy to use. While it offers similar functionality to @ethersproject/keccak256, it does not integrate as seamlessly with the ethers.js library and its broader Ethereum-related functionalities.

crypto-js

The crypto-js package is a widely-used library that provides a variety of cryptographic algorithms, including SHA-3 (Keccak). It is versatile and can be used for many different cryptographic needs. However, it is not specifically tailored for Ethereum development like @ethersproject/keccak256, which is part of the ethers.js ecosystem.

README

KECCAK256 Hash Function

This sub-module is part of the ethers project.

It is responsible for the identify function (i.e. KECCAK256) use in Ethereum.

For more information, see the documentation.

Importing

Most users will prefer to use the umbrella package, but for those with more specific needs, individual components can be imported.

const {

    keccak256

} = require("@ethersproject/keccak256");

License

MIT License