Block.scala

trait Block[P <: Proposition, TX <: Transaction[P]]
  extends TransactionsCarryingPersistentNodeViewModifier[P, TX] {
  def version: Version
  def timestamp: Timestamp
}

object Block {
  type BlockId = ModifierId
  type Timestamp = Long
  type Version = Byte
  val BlockIdLength: Int = NodeViewModifier.ModifierIdSize
}

trait BlockCompanion[P <: Proposition, TX <: Transaction[P], B <: Block[P, TX]]
  extends Serializer[B] {
  def isValid(block: B): Boolean
  def producers(block: B, history: History[B, _, _]): Seq[P]
}