def check_block(block):
"""检查收到的块"""
result = True
try:
string = block["header"].__str__() + block["trans_list"].__str__()
sig = block["sign"]
user_name = block["header"]["sender"]
hash_value = block["block_hash"]
if not check_sign(string, sig, user_name):
result = False
if not check_hash(string, hash_value):
result = False
block_index = int(block["header"]["index"])
db_top_index = BlockChain().get_top_block_index()
if block_index != db_top_index + 1:
result = False
if block["header"]["pr_block_hash"] != BlockChain().get_top_block_hash():
result = False
sender = block["header"]["sender"]
coin = block["tran"]["coin"]
sender_obj = AccountOpertion(sender)
coin_list = sender_obj.show_coins()
if coin in coin_list:
return False
except Exception as e:
Log().error("检查区块合法性失败：" + str(e))
result = False
finally:
return result
def check_net_block(block, ip):
"""检查块"""
result = True
try:
string = block["header"].__str__() + block["trans_list"].__str__()
sig = block["sign"]
user_name = block["header"]["sender"]
hash_value = block["block_hash"]
if not check_sign(string, sig, user_name):
result = False
if not check_hash(string, hash_value):
result = False
block_index = int(block["header"]["index"])
db = Mongodb(ip)
db_top_index = db.get_max_index()
if block_index != db_top_index + 1:
result = False
if block["header"]["pr_block_hash"] != db.get_top_block_hash():
result = False
sender = block["header"]["sender"]
coin = block["tran"]["coin"]
coin_list = db.show_coins(sender)
if coin in coin_list:
return False
except Exception as e:
Log().error("检查区块合法性失败：" + str(e))
result = False
finally:
return result
def __init__(self):
try:
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
dblist = myclient.list_database_names()
if "skin_chain" not in dblist:
Log().info("数据库不存在，正在创建--------")
print("数据库不存在，正在创建--------")
mydb = myclient["skin_chain"]
Log().info("已创建skin_chain数据库")
print("已创建skin_chain数据库")
else:
mydb = myclient["skin_chain"]
self.mycol = mydb["chain"]
except Exception as e:
print("数据库创建失败：" + str(e))
Log().error("数据库创建失败：" + str(e))
def insert(self, block):
"""在数据库插入新的块"""
try:
self.mycol.insert_one(block.block_dict)
return True
except Exception as e:
Log().error("区块插入失败：" + str(e))
print(e)
return False
def move_file(srcfile, dstpath):
"""复制文件到指定文件夹"""
try:
if not os.path.exists(dstpath):
os.mkdir(dstpath)
shutil.move(srcfile, dstpath)
return True
except Exception as e:
Log().error("文件不存在：" + str(e))
print("文件不存在：" + str(e))
return False
def get_block_list_by_user(self, user):
"""获取含有某一用户的所有块"""
try:
block_list_raw = json.loads(json_util.dumps(self.mycol.find({"header.sender": user}, {"_id": False}))) \
+ json.loads(json_util.dumps(self.mycol.find({"tran.recive": user}, {"_id": False})))
block_list = []
for item in block_list_raw:
if item not in block_list:
block_list.append(item)
return block_list
except Exception as e:
Log().error("通过用户获取块失败：" + str(e))
def response_sync():
"""同步请求(守护进程)"""
udp_server_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udp_server_sock.bind((get_host_ip(), Config.SYNCPORT))
udp_server_sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
while True:
mesg, addr = udp_server_sock.recvfrom(1024)
mesg = json.loads(mesg.decode('utf-8'))
try:
request = mesg["request"]
if request == "sync":
request_index = int(mesg["data"])
host_index = BlockChain().get_top_block_index()
if request_index < host_index:
block_list = []
for index in range(request_index, host_index):
block_list.append(BlockChain().get_block_by_index(index+1))
Client().push_blocks(block_list)
except Exception as e:
Log().error("同步请求响应失败：" + str(e))
pass
def send_file(path):
"""向全网广播文件，输入文件路径"""
addr = (Config.IPPOOL, Config.FILEPORT)
udp_cli_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
f = open(path, 'rb')
except Exception as e:
Log().error("路径文件不存咋：" + str(e))
count = 0
while True:
if count == 0:
data = bytes(path, encoding="utf8")
udp_cli_sock.sendto(data, addr)
data = f.read(1024)
if str(data) != "b''":
udp_cli_sock.sendto(data, addr)
else:
udp_cli_sock.sendto('end'.encode('utf-8'), addr)
break
count += 1
udp_cli_sock.close()
def get_block_list_by_coin(self, coin):
"""获取含有某一资产的所有块"""
try:
return json.loads(json_util.dumps(self.mycol.find({"tran.coin": coin}, {"_id": False})))
except Exception as e:
Log().error("通过资产获取块失败：" + str(e))
def get_block_by_index(self, index):
"""通过索引获取最新的块"""
try:
return json.loads(json_util.dumps(self.mycol.find({"header.index": index}, {"_id": False})))[0]
except Exception as e:
Log().error("获取最新块失败：" + str(e))
def clean(self):
"""清空数据库"""
try:
self.mycol.delete_many({})
except Exception as e:
Log().error("清空数据库失败：" + str(e))
def delete(self, index):
"""根据索引删除块"""
try:
self.mycol.delete_one({"header.index": index})
except Exception as e:
Log().error("删除失败：" + str(e))
