const key = crypto.getRandomValues(new Uint8Array(32))
const nonce = crypto.getRandomValues(new Uint8Array(12))

const encryptor = chacha20.Cipher.import(key, nonce)
const decryptor = chacha20.Cipher.import(key, nonce)

const message = new TextEncoder().encode("Hello world")

const encrypted = encryptor.feed(message)
const decrypted = decryptor.feed(encrypted)