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

$比特幣 (BTC.CC)$ import hashlib
import 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()]

定義創建創世塊的函數:
返回 Block(0, "0", datetime.datetime.now(), "Genesis Block")

定義添加區塊的函數:
new_block.previous_hash = self.chain[-1].hash
new_block.hash = new_block.calculate_hash()
self.chain.append(new_block)

定義工作證明函數(block, 難度):
當 block.hash[:difficulty] != '0' * difficulty:
            blockchain.nonce += 1
            blockchain.hash = blockchain.calculate_hash()
        print("區塊挖掘完成：", blockchain.hash)

# 示例使用
區塊開始必須有幾個零開頭的雜湊值
blockchain = blockchain

# 挖掘起源區塊
blockchain.proof_of_work(blockchain.chain[0], difficulty)
print("Genesis Block mined")

# 添加額外的區塊
num_blocks = 3
for i in range(1, num_blocks + 1):
    new_block = Block(i, "", datetime.datetime.now(), "Block " + str(i))
    blockchain.proof_of_work(new_block, difficulty)
    blockchain.add_block(new_block)
    print("Block", i, "added to the blockchain")