接着上一篇，这里继续整合交易类。

import datetime#交易类，后期需要整合公钥，私钥class Transaction: #payer 付款方，receiver收款方 def __init__(self,payer,receiver,money): self.payer = payer self.receiver = receiver self.money = money self.timestamp = datetime.datetime.now() #交易时间 def __repr__(self): return str(self.payer)+" pay "+str(self.receiver)+" "+str(self.money)+" "+str(self.timestamp)if __name__=="__main__": t = Transaction("yicheng","ddd",100) print(t)

测试模块：

if __name__=="__main__": t1 = Transaction("yicheng", "ddd1", 100) t2 = Transaction("yicheng", "ddd2", 200) t3 = Transaction("yicheng", "ddd3", 300) m1 = DaDaMessage(t1) m2 = DaDaMessage(t2) m3 = DaDaMessage(t3) try: m1.seal() m2.link(m1) m2.seal() m3.link(m2) m3.seal() #m1.hash = "0xaaaajjjjj" #m1.data = "I　don't love " m1.validate() m2.validate() m3.validate() print(m1) print(m2) print(m3) except InvalidateMessage as e: print(e)

查看打印结果：

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