def verify_new_block(cls, block: Block) -> bool:
"""验证一个新块"""
if not cls.verify_block_depth(block):
return False
# pre_hash的值要正确
if block.get_prehash() != BlockChain.get_instance().get_top_block(
).get_hash():
return False
# 验证每笔交易的有效性
inputs = []
for trans in block.get_user_transactions():
if not cls.verify_new_transaction(trans):
return False
inputs.extend(trans.get_inputs())
# 不同的交易不能有相同的输入
if len(set(inputs)) != len(inputs):
return False
return True
def verify_block_depth(cls, block: Block) -> bool:
"""深入验证区块（包括区块中的交易）"""
if not cls.verify_block(block):
return False
# 验证用户的交易
for trans in block.get_user_transactions():
if not cls.verify_transaction(trans):
return False
# 验证第一笔交易
trans = block.get_head_transaction()
# 计算交易费
fee = BlockChain.get_instance().compute_block_fee(block)
# 计算矿工奖励
mini_fee = trans.compute_outputs_btcs() - fee
# 计算这个区块时的矿工奖励
mini_btcs = block.get_now_ming_btcs()
# 验证矿工奖励合法性
if mini_fee != mini_btcs:
return False
return True
def accept_block(self, block: Block) -> None:
"""胜利者已经产生（新块已加入区块链）"""
self.suspend_mining()
self.remove_trans(*block.get_user_transactions())