class BlockChain:
"""
doc New blockchain
"""
def __init__(self):
# At first storage blocks in a memory list
# and then we storage this in redis
# self.blocks = []
self.blocks = Redis()
self.current_hash = None
def add_block(self, new_block):
"""
添加block到链上
:param new_block:
:return:
"""
# there we should mark last block hash to create a new block.
# in the redis the l is the last block hash value key.
pow = ProofOfWork(new_block, new_block["Nonce"])
if pow.validate():
# self.blocks.append(new_block)
if not self.blocks.get(new_block["Hash"]):
# 不存在的加入
self.blocks.set(new_block["Hash"], new_block)
self.blocks.set("l", new_block["Hash"])
def get_height(self):
last_hash = self.blocks.get("l")
last_block = self.blocks.get(last_hash).decode()
return eval(last_block)["Height"]
def iterator(self):
# 这里没有迭代创世区块
if not self.current_hash:
self.current_hash = self.blocks.get("l")
last_block = self.blocks.get(self.current_hash).decode()
if eval(last_block)["PrevBlockHash"]:
self.current_hash = eval(last_block)["PrevBlockHash"]
yield eval(last_block)
def get_block(self, block_hash):
block = self.blocks.get(block_hash)
if block:
return eval(block.decode)
else:
return "区块不存在"
def find_tx(self, tid):
"""
根据交易id找到交易信息
:param tid:
:return:
"""
while True:
try:
block = next(self.iterator())
except StopIteration:
genesis_hash = self.blocks.get(self.current_hash).decode()
last_block = eval(genesis_hash)
coinbase_tx = last_block["Transactions"]
for tx in coinbase_tx:
tx_obj = json.loads(tx.decode())
if tx_obj["ID"] == tid:
return tx
break
for tx in block["Transactions"]:
tx_obj = json.loads(tx.decode())
if tx_obj["ID"] == tid:
return tx
return "未找到交易信息"
def find_utxo(self):
"""
找出所有的utxo
:return:
"""
utxo = dict() # 存储utxo的信息
spent_tx = dict()
while True:
try:
last_block = next(self.iterator())
except StopIteration:
genesis_hash = self.blocks.get(self.current_hash).decode()
last_block = eval(genesis_hash)
coinbase_tx = last_block["Transactions"]
for tx in coinbase_tx:
tx_json = json.loads(tx.decode())
utxo[tx_json["ID"]] = []
for out in tx_json["Vout"]:
if not spent_tx[tx_json["ID"]]:
utxo[tx_json["ID"]].append(out)
break # 程序退出边界条件
for tx in last_block["Transactions"]:
tx_json = json.loads(tx.decode())
utxo[tx_json["ID"]] = []
for out in tx_json["Vout"]:
if not spent_tx[tx_json["ID"]]:
utxo[tx_json["ID"]].append(out)
for vin in tx_json["Vin"]:
spent_tx[vin["txid"]] = []
for vin in tx_json["Vin"]:
spent_tx[vin["txid"]].append(vin)
return utxo
def all_hashes(self):
return [b for b in self.blocks.keys() if b != 'l']
def mine_block(self, transactions):
"""
根据链上的最后一个区块的hash值，生成一个新的block
:param transactions:
:return:
"""
lash_hash = self.blocks.get("l").decode()
height = self.get_height()
b = Block()
new_block = b.new_block(transactions, lash_hash, height + 1)
return new_block
def sign_transaction(self, tx):
"""
交易信息加密
:return:
"""
pass
def verify_transaction(self, tx):
"""
交易信息解密
:return:
"""
pass
def print_blockchain(self):
"""
输出blockchain
:return:
"""
# for b in self.blocks:
# print(b)
blocks = []
for b in self.blocks.keys():
if b.decode() != 'l':
v = self.blocks.get(b).decode()
blocks.append(eval(v))
return blocks
#!/usr/bin/env python
# -*- coding:utf-8 -*-
"""
This Document is Created by At 2018/7/11
"""
from storage.redis_storage import Redis
if __name__ == '__main__':
r = Redis()
r.set('magic', {"index": 1, "sex": "男", "age": 18})
# print(r.get("magic").decode())
#
# print(r.rds.keys())
for k in r.keys():
print(r.get(k).decode())
# r.remove("magic")
# print(r.get("magic"))