python挖矿算力测试程序详解

 import hashlib x = 11 y = 1 #这里可以调节挖矿难度，也就是哈希的长度 while hashlib.sha256(f'{x*y}'.encode("utf-8")).hexdigest()[5:7]!="00": print(x*y) y +=1 print("找到了：",(x*y))

 #挖矿原理与网络共识 import datetime import hashlib import json import requests class Blockchain2: def __init__(self): self.chain = [] #区块链列表 self.nodes = set() #节点集合 self.current_tranactions = [] #交易列表 self.new_block(proof=100,preHash=1) #创建第一个区块 #新建一个区块，需要计算，才能追加 def new_block(self,proof,preHash = None): block={ "index":len(self.chain)+1,#区块索引 "timestamp":datetime.datetiem.now(),#区块时间戳 "transactions":self.current_tranactions,#区块交易记录集合 "proof":proof,#算力凭证 "preHash":preHash or self.hash(self.chain[-1]), #上一块的哈希 } self.current_tranactions = [] #开辟新的区块，初始化区块交易记录 self.chain.append(block) @staticmethod def hash(block): #处理为json字符串格式的哈希 block_str = json.dumps(block,sort_keys=True).encode("utf-8") return hashlib.sha256(block_str).hexdigest() #新增交易记录 def new_transaction(self,sender,receiver,amount): transaction ={ "sender":sender, "receiver":receiver, "amount":amount, } self.current_tranactions.append(transaction) return self.last_block["index"]+1 @property def last_block(self): return self.chain[-1] #挖矿，依赖上一个模块，获取工作量证明，即POW共识机制 def proof_of_work(self,last_block): last_proof = last_block["proof"] last_hash = self.hash(last_block) proof = 0 while self.valid_proof(last_proof,proof,last_hash) is False: proof +=1 return proof #校验工作量 @staticmethod def valid_proof(last_proof,proof,last_hash): guess = f'{last_proof}{proof}{last_hash}'.encode("utf-8") guess_hash = hashlib.sha256(guess).hexdigest() return guess_hash[:6] =="000000" #可以调整计算难度 #区块一致性，同步算法, def resolve_conflicts(self): neighbours = self.nodes new_chain = None max_length = len(self.chain) #遍历所有节点，找出最长的链 for node in neighbours: #获取节点区块链信息 response = requests.get(f'http://{node}/chain') if response.status_code ==200: length = response.json()["length"] chain = response.json()["chain"] if length>max_length and self.valid_chain(chain): max_length = length new_chain = chain if new_chain: self.chain = new_chain return True else: return False #校验区块链的合法性 def valid_chain(self,chain): last_block = chain[0] current_index = 1 #校验每一个区块的prehash,proof合法性 while current_index