const jose = require('jose-simple')
// You need a private / public JWE key pair.
// Either load them from `.pem` files, create them, or somehow acquire them.
// The private key must not have a passphrase or cypher!
// see https://github.com/cisco/node-jose/issues/69#issuecomment-236133179
// see also https://github.com/cisco/node-jose/issues/234#issuecomment-457615794
// see unit tests for a simple example.
const { encrypt, decrypt } = jose(privateKey, publicKey)
const someData = {
  some: 'amazing data',
  you: 'want to keep hidden',
  from: 'prying eyes'
}
encrypt(someData).then(encrypted => {
  console.log('encrypted', encrypted)
  decrypt(encrypted).then(decrypted => {
    console.log('decrypted', decrypted)
    // decrypted will be the same as someData
  })
})

const { encrypt, decrypt } = jose(privateKey, publicKey, {
  format: 'compact'
  protect: true,
  // or any of the encrypt options than can be passed to JWE.createEncrypt.
  // https://github.com/cisco/node-jose/blob/master/lib/jwe/encrypt.js#L660-L668
})