date.datetime.now(),"TransactionData1",""))blockchain.add_block(Block(2,date.datetime.now(),"TransactionData2",""))blockchain.add_block(Block(3,date.datetime.now(),"TransactionData3",""))#Printthecontentsoftheb
class Blockchain: def __init__(self): self.transactions = [] self.chain = [] self.nodes = set() #Generate random number to be used as node_id self.node_id = str(uuid4()).replace('-', '') #Create genesis block self.create_block(0, '00') def regi...
它最大的特点就是没有使用区块链作为加密货币的实现基础,其灵感来自于 这篇论文:Blockchain-Free Cryptocurrencies: A Framework for Truly Decentralised Fast Transactions。 Python源码下载:https://github.com/DutchGraa/crackcoin 6、cert-issuer - 基于区块链的毕业证书签发与验证 cert-issuer是一个基于比特币或以...
Create the blockchain and add the genesis block blockchain = [create_genesis_block()] previous_block = blockchain[0] How many blocks should we add to the chain after the genesis block num_of_blocks_to_add = 20 Add blocks to the chain for i in range(0, num_of_blocks_to_add): blo...
首先创建一个Blockchain类,在构造函数中创建了两个列表,一个用于储存区块链,一个用于储存交易。 以下是Blockchain类的框架: Blockchain类用来管理链条,它能存储交易、加入新块等,下面我们来进一步完善这些方法。 块结构 每个区块包含属性:索引(index)、Unix时间戳(timestamp)、交易列表(transactions)、工作量证明(稍后...
Blockchain<0 Blocks, Head: None> In [83]: # 添加区块 chain.add_block(block) # 打印 chain Out[83]: Blockchain<1 Blocks, Head: 364c0cf963384ca28a2763499a140405> In [84]: # 添加更多的区块 for i in range(6): new_block = Block(i) new_block.mine() chain.add_block(new_block...
以上是必要的工作。现在我们可以创建我们的blockchain!在我们的例子中,blockchain本身就是一个简单的Python列表。列表的第一个元素是起源块。当然,我们需要添加后续的块。因为SnakeCoin是最小的块,所以我们只添加20个新的块。我们可以用for循环来做到这一点。
# 增加block defadd_block(self, block): block.previous_hash = self.get_latest_block().hash block.mineblock(self.difficult) self.chain.append(block) # 获得一个账户的balance defget_balance(self, addr): balance = 0for block inself.chain:for transaction in block.transactions:if...
return reduce(hash_reducer, [block['prev'], block['nonce'], reduce(hash_reducer, [tx['hash'] for tx in block['transactions']], EMPTY_HASH)]) def hash_utxo(utxo): return reduce(hash_reducer, [utxo['id'], utxo['addr'], str(utxo['amount'])]) def hash_tx(tx): return reduce(...
def broadcast_transaction(transaction):url = "https://blockchain-api.example.com/broadcast" # 替换为实际的区块链API地址response = requests.post(url, json=transaction)return response.json()# 广播交易response = broadcast_transaction(transaction)print(f"Broadcast Response: {response}") ...