def blockchain():
bc = BlockChain()
blocks = bc.print_blockchain()
blocks = sorted(blocks, key=lambda s: s['Data'])
return json.dumps(blocks)
def iter_blockchain(last_hash=None):
bc = BlockChain()
if not last_hash:
last_hash = bc.blocks.get("l")
last_block = bc.blocks.get(last_hash).decode()
print(last_block)
if eval(last_block)["PrevBlockHash"]:
return iter_blockchain(eval(last_block)["PrevBlockHash"])
# ### the way to itertor.
# for i in range(bc.get_height()):
# print(bc.iterator())
print(next(bc.iterator()))
print(next(bc.iterator()))
print(next(bc.iterator()))
def test_create_bc():
bc = BlockChain()
# 创世区块
coinbase = new_coinbase_tx("7AgP8z7XYyZ2sdnVJ6HCiE5X2reJDf")
genesis_block = new_genesis_block(coinbase)
bc.add_block(genesis_block)
b = Block()
# 自定义几个block
for i in range(5):
transactions = [b'Node1', b"Node2", b"Node3", b"Node4"]
last_hash = bc.blocks.get("l").decode()
height = bc.get_height()
new_block = b.new_block(transactions, last_hash, height + 1)
bc.add_block(new_block)
if eval(last_block)["PrevBlockHash"]:
return iter_blockchain(eval(last_block)["PrevBlockHash"])
# ### the way to itertor.
# for i in range(bc.get_height()):
# print(bc.iterator())
print(next(bc.iterator()))
print(next(bc.iterator()))
print(next(bc.iterator()))
if __name__ == '__main__':
# test_create_bc()
# s = iter_blockchain()
bc = BlockChain()
while True:
try:
last_block = next(bc.iterator())
except StopIteration:
genesis_hash = bc.blocks.get(bc.current_hash).decode()
last_block = eval(genesis_hash)
coinbase_tx = last_block["Transactions"]
for tx in coinbase_tx:
tx_str = tx.decode()
print(json.loads(tx_str))
break
#!/usr/bin/env python
# -*- coding:utf-8 -*-
"""
This Document is Created by At 2018/7/9
"""
from core.blockchain.blockchain import BlockChain
if __name__ == '__main__':
bc = BlockChain()
for i in range(10):
bc.add_block("Magic Test %d" % i)
bc.print_blockchain()