class Node(nodeId: String) extends Actor with ActorLogging {

  import Node._

  implicit lazy val timeout = Timeout(5.seconds)

  val broker = context.actorOf(Broker.props)
  val miner = context.actorOf(Miner.props)
  val blockchain = context.actorOf(Blockchain.props(EmptyChain, nodeId))

  miner ! Ready

  //Code...
}