def resolve(self):
winnerChain = self.__chain
replace = False
for node in self.__peerNodes:
url = 'http://{}/chain'.format(node)
# try:
response = requests.get(url)
nodeChain = response.json()
nodeChain = [
Block(block['index'], block['previousHash'], [
Transaction(tx['copyrightOwner'], tx['picUrl'],
tx['signature'], tx['picPhash'])
for tx in block['transactions']
], block['proof'], block['timestamp']) for block in nodeChain
]
nodeChainLength = len(nodeChain)
localChainLength = len(winnerChain)
print nodeChainLength > localChainLength
print Verification.verifyChain(nodeChain)
if nodeChainLength > localChainLength and Verification.verifyChain(
nodeChain):
winnerChain = nodeChain
replace = True
# except requests.exceptions.ConnectionError:
# print 'requestsErr'
# continue
self.resolveConflicts = False
self.__chain = winnerChain
if replace:
self.__openTransactions = []
self.saveData()
return replace
def listenForImput(self):
"""命令行函数"""
waitingForInput = True
while waitingForInput:
print("帮助：")
print("1：添加新的事务")
print("2：挖掘新区块")
print("3：打印所有区块")
print("4：创建用户")
print("5：加载用户")
print('6：保存公私钥')
print("q：退出")
userChoice = input("请选择一项并执行：")
# 命令行列表
if userChoice == '1':
txData = self.getTransactionValue()
picUrl, phash = txData
signature = self.user.signTransaction(self.user.publicKey,
picUrl, phash)
if self.blockChain.addTransaction(self.user.publicKey, picUrl,
signature, phash):
print(self.blockChain.getOpenTransactions())
else:
print('事务添加失败')
elif userChoice == '2':
if not self.blockChain.mineBlock:
print('挖掘失败，请检查是否存在已加载或创建的用户')
elif userChoice == '3':
self.printAllBlock()
elif userChoice == '4':
self.user.createKeys()
self.blockChain = BlockChain(self.user.publicKey)
elif userChoice == '5':
self.user.loadKeys()
self.blockChain = BlockChain(self.user.publicKey)
elif userChoice == '6':
self.user.saveKeys()
elif userChoice == 'q':
waitingForInput = False
else:
print("参数不合法，请重新输入")
continue
if not Verification.verifyChain(self.blockChain.getChain()):
print("区块链不合法")
waitingForInput = False
