def __mining(self) -> Optional[Block]:
"""挖矿"""
trans_list = self.__get_mining_trans()
with FullBlockChain.safe_use_blockchain() as blc:
block = Block(blc.get_height() + 1, blc.get_top_hash())
# 计算总交易费
fee = Btc("0")
for trans in trans_list:
fee += blc.compute_transaction_fee(trans)
block.add_transaction(trans) # 添加交易到block中
# 加上矿工奖励
fee += block.get_now_ming_btcs()
# 构造创块交易
head_trans = Transaction()
head_trans.add_output(TransOutput(address=self.address, btcs=fee))
block.set_head_transaction(head_trans)
# 正式开始挖矿
while not block.veri_hash():
if self.mine_flag:
block.randnum += MINING_ADD_NUM
block.timestap = time.time()
else: # 中止挖矿（失败了）
self.add_trans(*trans_list) # 把交易放回交易池
return None
return block
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