text: from dataclasses import dataclass
  from typing import List, Optional
  
  from apple.types.blockchain_format.foliage import Foliage, FoliageTransactionBlock, TransactionsInfo
  from apple.types.blockchain_format.reward_chain_block import RewardChainBlock
  from apple.types.blockchain_format.vdf import VDFProof
  from apple.types.end_of_slot_bundle import EndOfSubSlotBundle
  from apple.util.streamable import Streamable, streamable
  
  
  @dataclass(frozen=True)
  @streamable
  class HeaderBlock(Streamable):
      # Same as a FullBlock but without TransactionInfo and Generator (but with filter), used by light clients
      finished_sub_slots: List[EndOfSubSlotBundle]  # If first sb
      reward_chain_block: RewardChainBlock  # Reward chain trunk data
      challenge_chain_sp_proof: Optional[VDFProof]  # If not first sp in sub-slot
      challenge_chain_ip_proof: VDFProof
      reward_chain_sp_proof: Optional[VDFProof]  # If not first sp in sub-slot
      reward_chain_ip_proof: VDFProof
      infused_challenge_chain_ip_proof: Optional[VDFProof]  # Iff deficit < 4
      foliage: Foliage  # Reward chain foliage data
      foliage_transaction_block: Optional[FoliageTransactionBlock]  # Reward chain foliage data (tx block)
      transactions_filter: bytes  # Filter for block transactions
      transactions_info: Optional[TransactionsInfo]  # Reward chain foliage data (tx block additional)
  
      @property
      def prev_header_hash(self):
          return self.foliage.prev_block_hash
  
      @property
      def prev_hash(self):
          return self.foliage.prev_block_hash
  
      @property
      def height(self):
          return self.reward_chain_block.height
  
      @property
      def weight(self):
          return self.reward_chain_block.weight
  
      @property
      def header_hash(self):
          return self.foliage.get_hash()
  
      @property
      def total_iters(self):
          return self.reward_chain_block.total_iters
  
      @property
      def log_string(self):
          return "block " + str(self.header_hash) + " sb_height " + str(self.height) + " "
  
      @property
      def is_transaction_block(self) -> bool:
          return self.reward_chain_block.is_transaction_block
  
      @property
      def first_in_sub_slot(self) -> bool:
          return self.finished_sub_slots is not None and len(self.finished_sub_slots) > 0
  