$比特币 (BTC.CC)$ import hashlib import datetime class Block: ...

$比特币 (BTC.CC)$ 导入hashlib
导入datetime

class Block:
def __init__(self, index, previous_hash, timestamp, data, nonce=0):
        self.index = index
        self.previous_hash = previous_hash
        self.timestamp = timestamp
self.data = data
self.nonce = nonce
self.hash = self.calculate_hash()

def calculate_hash(self):
return hashlib.sha256((str(self.index) + self.previous_hash + str(self.timestamp) + self.data + str(self.nonce)).encode()).hexdigest()

class Blockchain:
def __init__(self):
self.chain = [self.create_genesis_block()]

def create_genesis_block(self):
return Block(0, "0", datetime.datetime.now(), "Genesis Block")

def add_block(self, new_block):
new_block.previous_hash = self.chain[-1].hash
new_block.hash = new_block.calculate_hash()
self.chain.append(new_block)

def proof_of_work(self, block, difficulty):
while block.hash[:difficulty] != '0' * difficulty:
block.nonce += 1
block.hash = block.calculate_hash()
print("挖矿成功：", block.hash)

# 示例用法
difficulty = 4 # 输出哈希值开头需要的零的个数
blockchain = blockchain

# 挖掘创世区块
blockchain.proof_of_work(blockchain.chain[0], difficulty)
print("初始区块已挖矿")

# 添加额外的区块
num_blocks = 3
for i in range(1, num_blocks + 1):
    new_block = Block(i, "", datetime.datetime.now(), "区块" + str(i))
    blockchain.proof_of_work(new_block, difficulty)
    blockchain.add_block(new_block)
    print("区块", i, "已添加到blockchain")