From Zero to Blockchain in Python - Part 1 - Add Blocks

add_blocks.py

def add_block(self, block):
  """
  Creates a new block and passes it to the chain

  :param block: <Block> Block to add to the chain
  :return: <bool> True if the block is added to the chain, False if not.
  """
  if self.validate_block(block, self.last_block):
      self.__chain.append(block)

      # Remove transactions from the list
      self.__current_transactions = []

      return True

  return False

def validate_block(self, current_block, previous_block):
  """
  Validates a block with reference to its previous

  :param current_block:
  :param previous_block:
  :return:
  """
  # Check the block index
  if current_block.index != previous_block.index + 1:
      return False

  if current_block.previous_hash != previous_block.hash:
      return False

  if current_block.hash != current_block.hash_block():
      return False

  if not self.validate_proof_of_work(previous_block.nonce, previous_block.hash, current_block.nonce):
      return False

  return True