簡易區塊鏈的python實現

import hashlib

import datetime
class
ttblockcoin:
def__init__
(self,
index,  # 索引
timestamp,  # 時間戳
data,  # 交易資料
lasthash):
# 上乙個塊的hash值
self.index = index
self.timestamp = timestamp
self.data = data
self.lasthash = lasthash
self.selfhash = self.hash_ttblockcoin()
# 產生加密串,產生乙個加密串就是產生乙個幣
defhash_ttblockcoin
(self):
# sha = hashlib.sha256()
# sha = hashlib.sha512()
sha = hashlib.md5()
datastr = str(self.index) + str(self.timestamp) + str(self.data) + str(self.lasthash)
sha.update(datastr.encode("utf-8"))
return sha.hexdigest()
defcreate_first_ttblock
():# 創造乙個創世區塊
return ttblockcoin(0, datetime.datetime.now(), "tt coin", "tt001")
defcreate_money_ttblock
(last_block):
# 區塊鏈的其他塊  last_block 上乙個區塊
this_index = last_block.index + 1
this_timestamp = datetime.datetime.now()
this_data = "taotao coin" + str(this_index)  # 模擬交易資料
last_hash = last_block.selfhash    #lasthash =上乙個block的selfhash
return ttblockcoin(this_index,
this_timestamp,
this_data,
last_hash)
ttblockcoins = [create_first_ttblock()]  # 區塊鏈鍊錶
nums = 100
head_block = ttblockcoins[0]
print("創世區塊tt幣來啦")
print(head_block.index, head_block.data, head_block.timestamp, 
head_block.lasthash, head_block.selfhash)
for i in range(nums):
ttblock_another = create_money_ttblock(head_block)  # 根據第乙個區塊創造下乙個區塊
head_block = ttblock_another
print(ttblock_another.index, ttblock_another.data, 
ttblock_another.timestamp, ttblock_another.lasthash,
ttblock_another.selfhash)

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