const { JWT, JWK, KeyObject } = require('jose')

class CustomKey extends JWK.CustomKey {
  constructor () {
    super({ alg: 'EC', use: 'sig', kid: '12345678', ops: ['sign', 'verify'], keyType: 'private' })
  }

  toPEM (priv, encoding) {
    return undefined
  }

  algorithms (operation) {
    return new Set(['ES256'])
  }

  sign (alg, buffer) {
    console.log('sign invoked: ', alg)
    return 'BASE_64_ENCODED_SIGNATURE'
  }

  verify (alg, buffer) {
    console.log('verify invoked: ', alg)
    return true
  }
}

const customKey = new CustomKey()

const encoded = JWT.sign({}, customKey, {
  expiresIn: '600s'
})

console.log('encoded : ', encoded)

const decoded = JWT.verify(encoded, customKey)

console.log('decoded : ', decoded)