如何使用OpenPGP.js简单地加密字符串？

const { generateKey } = require('openpgp');

const generateKeyPair = async () => {
  const { privateKeyArmored, publicKeyArmored } = await generateKey({
    userIds: [{ name: 'Your Name', email: 'your@email.com' }],
    curve: 'ed25519',
    passphrase: 'your-passphrase'
  });

  console.log('Private Key:', privateKeyArmored);
  console.log('Public Key:', publicKeyArmored);
};

generateKeyPair();

const publicKeyString = '-----BEGIN PGP PUBLIC KEY BLOCK-----\n...' // 接收方的公钥字符串

const loadPublicKey = async () => {
  const publicKey = await openpgp.readKey({ armoredKey: publicKeyString });
  return publicKey;
};

const publicKey = loadPublicKey();

const encryptString = async (publicKey, plaintext) => {
  const { data: encrypted } = await openpgp.encrypt({
    message: openpgp.message.fromText(plaintext),
    publicKeys: publicKey
  });

  return encrypted;
};

const plaintext = 'Hello, World!';
const encryptedString = encryptString(publicKey, plaintext);
console.log('Encrypted String:', encryptedString);