def init():
# 删除旧文件
if os.path.isfile(STORE_BLC_FILE_PATH):
os.remove(STORE_BLC_FILE_PATH)
if os.path.isfile(STORE_KEYS_FILE_PATH):
os.remove(STORE_KEYS_FILE_PATH)
# 打开N服务和B服务
NetworkRouting.get_instance().start_server()
FullBlockChain.get_instance().start_server()
# 添加创世区块
keys = [UserKey() for i in range(10)]
for key in keys:
Wallet.get_instance().add_key(key)
Miner.get_instance().set_wallet_address(keys[0].get_address())
t = Transaction()
for key in keys:
t.add_output(TransOutput(Btc("1000"), key.get_address()))
block = Block(1)
block.add_transaction(t)
head_trans = Transaction()
head_trans.add_output(TransOutput(Btc(MINING_BTCS), keys[0].get_address()))
block.set_head_transaction(head_trans)
block.find_randnum()
FullBlockChain.get_instance().add_first_block(block)
Wallet.get_instance().write_keys_to_file()
def __mining(self) -> Optional[Block]:
"""挖矿"""
trans_list = self.__get_mining_trans()
with FullBlockChain.safe_use_blockchain() as blc:
block = Block(blc.get_height() + 1, blc.get_top_hash())
# 计算总交易费
fee = Btc("0")
for trans in trans_list:
fee += blc.compute_transaction_fee(trans)
block.add_transaction(trans) # 添加交易到block中
# 加上矿工奖励
fee += block.get_now_ming_btcs()
# 构造创块交易
head_trans = Transaction()
head_trans.add_output(TransOutput(address=self.address, btcs=fee))
block.set_head_transaction(head_trans)
# 正式开始挖矿
while not block.veri_hash():
if self.mine_flag:
block.randnum += MINING_ADD_NUM
block.timestap = time.time()
else: # 中止挖矿（失败了）
self.add_trans(*trans_list) # 把交易放回交易池
return None
return block
def pay(self, pay_to: Dict[str, Btc]) -> Transaction:
"""向一个或多个地址付钱（生成一笔交易）"""
pay_sum = Btc("0")
for value in pay_to.values(): # 计算总的要付的钱
pay_sum += value
if self.lookup_balance() < pay_sum + self.trans_fee: # 如果钱不够
raise RuntimeError("number of btc is not enough!")
# self.__sort_balance()
address_set = set()
pay_actually = Btc("0")
t = Transaction()
for address, btcs in pay_to.items(): # 添加交易输出
t.add_output(TransOutput(address=address, btcs=btcs))
for inp, outp in self.utxos.items(): # 添加交易输入
address_set.add(outp.address)
pay_actually += outp.btcs
t.add_input(TransInput.load(inp))
if pay_actually >= pay_sum + self.trans_fee:
break
pay_change = pay_actually - (pay_sum + self.trans_fee) # 添加找零
if pay_change != Btc("0"):
user_key = UserKey()
t.add_output(
TransOutput(address=user_key.get_address(), btcs=pay_change))
self.add_key(user_key)
for address in address_set: # 签名
tap_key = self.get_key(address)
if tap_key is None:
raise RuntimeError("wallet balance info is out-of-date!")
t.sign_transaction(tap_key)
return t
from key import UserKey
from chain import Btc, TransOutput, TransInput, Transaction, Block, BlockChain
from config import MINING_BTCS
from verify import Verify
if __name__ == "__main__":
print(BlockChain.__qualname__, BlockChain.get_instance.__qualname__)
# 创建区块链
bc = BlockChain.get_instance()
print(bc.get_start_time())
# 初始的两个用户
key1 = UserKey()
key2 = UserKey()
# 初始区块的创币交易（只有输出，没有输入）
t1 = Transaction()
t1.add_output(TransOutput(Btc("5000"), key1.get_address()))
t1.add_output(TransOutput(Btc("5000"), key2.get_address()))
# 创世区块
b1 = Block()
b1.add_transaction(t1)
# 添加矿工奖励交易
mt1 = Transaction()
mt1.add_output(TransOutput(Btc(MINING_BTCS), key1.get_address()))
b1.set_head_transaction(mt1)
b1.set_index(1)
# 挖矿
b1.find_randnum()
# 添加区块
bc.add_block(b1)
# key1向key2转账
t2 = Transaction()