有人能帮我创建一个伪码来展示比特币如何防止双重消费吗?下面是我的代码(在的帮助下):
This program is to prevent double-spending:
Person A and Person B go to a store with only one collective BTC to spend.
Person A buys a TV costing exactly 1 BTC.
Person B buys a motorcycle that also costs exactly 1 BTC.
blockchain = []
pool_of_unconfirmed_t