Version.scala

sealed trait Version extends Wire

case object V0_3 extends Version {
  val toWire = 0x5f75e83e
  val fromWire = "V0_3"
}

case object V0_4 extends Version {
  val toWire = 0x400c2d20
  val fromWire = "V0_4"
}

sealed trait Protocol extends Wire

case object JSON extends Protocol {
  val toWire = 0x7e6970c7
  val fromWire = "JSON"
}

Wire.scala

sealed trait Wire {
  val toWire: Int
  val fromWire: String
}