cryptography

import * as ed from '@noble/ed25519';

declare type Hex = Uint8Array | string;

const Ed25519Sign = async (privateKey: Hex, message: Uint8Array) => {
  const signature = await ed.sign(message, privateKey);
  return signature;
};

const Ed25519Verify = async (pubKey: Hex, signature: Hex, message: Hex) => {
  const isValid = await ed.verify(signature, message, pubKey);
  return isValid;
};

const sigBytes = await Ed25519Sign(privatekey, new TextEncoder().encode('Hello'));

const isValid = await Ed25519Sign(pubKey, sigBytes, new TextEncoder().encode('Hello'));