如何解决如何使用 Python AlgoSDK 恢复 Algorand 钱包？
尽管官方 algosdk（algorand 的 Python SDK）文档表明只需调用以下函数 (link) 即可恢复钱包：
create_wallet(name,pswd,driver_name='sqlite',master_deriv_key=None)
第四个参数：
master_deriv_key (str,optional) – if recovering a wallet,include
钱包恢复在我的代码中不起作用，也会导致出现异常。此外，algorand 官方文档还展示了如何使用上述功能恢复钱包 (link)：
# recover the wallet by passing mdk when creating a wallet
new_wallet = kcl.create_wallet("MyTestWallet2","testpassword",master_deriv_key=mdk)
在下面，您可以观看我的代码，这是我编写的一个非常简单的代码段，用于使用 algorand SDK 进行一些测试：
from algosdk import kmd
from algosdk import mnemonic
kmd_clt = kmd.KMDClient('855d39510cce40caf11de4c941b37632d1529ec970156214528a33a0ae8473b4','http://127.0.0.1:6969')
if kmd_clt:
kmd_wlt_mdk = None
kmd_wlt_list = kmd_clt.list_wallets()
for kmd_wlt in kmd_wlt_list:
kmd_name = kmd_wlt['name']
kmd_id = kmd_wlt['id']
if kmd_name == 'wallet_name':
kmd_wlt_hdl = kmd_clt.init_wallet_handle(kmd_id,'wallet_password')
if kmd_wlt_hdl:
kmd_wlt_mdk = kmd_clt.export_master_derivation_key(kmd_wlt_hdl,'wallet_password')
break
if kmd_wlt_mdk:
kmd_wlt = kmd_clt.create_wallet('wallet_name','wallet_password',master_deriv_key=kmd_wlt_mdk)
kmd_wlt_hdl = kmd_clt.init_wallet_handle(kmd_wlt['id'],'wallet_password')
acc_addr_list = kmd_clt.list_keys(kmd_wlt_hdl)
for acc_addr in acc_addr_list:
account_address = acc_addr
print(account_address)
account_key = kmd_clt.export_key(kmd_wlt_hdl,account_address)
print(account_key)
account_mnemonic = mnemonic.from_private_key(account_key)
print(account_mnemonic)
下面，您可以查看 Traceback 和运行时返回的错误消息：
Traceback (most recent call last):
File "/home/emiliano/anaconda3/lib/python3.7/site-packages/algosdk/kmd.py",line 63,in kmd_request
resp = urlopen(req)
File "/home/emiliano/anaconda3/lib/python3.7/urllib/request.py",line 222,in urlopen
return opener.open(url,data,timeout)
File "/home/emiliano/anaconda3/lib/python3.7/urllib/request.py",line 531,in open
response = meth(req,response)
File "/home/emiliano/anaconda3/lib/python3.7/urllib/request.py",line 641,in http_response
'http',request,response,code,msg,hdrs)
File "/home/emiliano/anaconda3/lib/python3.7/urllib/request.py",line 569,in error
return self._call_chain(*args)
File "/home/emiliano/anaconda3/lib/python3.7/urllib/request.py",line 503,in _call_chain
result = func(*args)
File "/home/emiliano/anaconda3/lib/python3.7/urllib/request.py",line 649,in http_error_default
raise HTTPError(req.full_url,hdrs,fp)
urllib.error.HTTPError: HTTP Error 400: Bad Request
During handling of the above exception,another exception occurred:
Traceback (most recent call last):
File "/home/emiliano/anaconda3/lib/python3.7/site-packages/algosdk/kmd.py",line 67,in kmd_request
raise error.KMDHTTPError(json.loads(e)["message"])
algosdk.error.KMDHTTPError: wallet with same name already exists
During handling of the above exception,another exception occurred:
Traceback (most recent call last):
File "algorand_test.py",line 49,in <module>
kmd_wlt = kmd_clt.create_wallet('emiliano','emiliano',master_deriv_key=kmd_wlt_mdk)
File "/home/emiliano/anaconda3/lib/python3.7/site-packages/algosdk/kmd.py",line 118,in create_wallet
return self.kmd_request("POST",req,data=query)["wallet"]
File "/home/emiliano/anaconda3/lib/python3.7/site-packages/algosdk/kmd.py",line 69,in kmd_request
raise error.KMDHTTPError(e)
algosdk.error.KMDHTTPError: {
"error": true,"message": "wallet with same name already exists"
}
似乎很清楚 create_wallet 函数是如何导致这种行为的罪魁祸首，导致返回错误“同名钱包已经存在”。 algorand SDK 的内部结构非常简单，API 是 REST 方法的包装器。函数 create_wallet 只是 (link)：
def create_wallet(self,name,driver_name="sqlite",master_deriv_key=None):
"""
Create a new wallet.
Args:
name (str): wallet name
pswd (str): wallet password
driver_name (str,optional): name of the driver
master_deriv_key (str,optional): if recovering a wallet,include
Returns:
dict: dictionary containing wallet information
"""
req = "/wallet"
query = {
"wallet_driver_name": driver_name,"wallet_name": name,"wallet_password": pswd
}
if master_deriv_key:
query["master_derivation_key"] = master_deriv_key
return self.kmd_request("POST",data=query)["wallet"]
我确定输入中传递的主派生密钥是正确的，因为我已经使用控制台中的 goal 命令对其进行了检查。
有没有其他人遇到过这种类型的问题？
解决方法
总而言之，Algorand 的 REST API 文档并未明确建议在制作 POST /v1/wallet (link) 时使用主派生密钥来检索钱包。相反，Python SDK 的 Algorand 文档建议可以将 Master-Derivation-Key 传递给 create_wallet 函数，然后该函数执行之前所述的 HTTP POST，以恢复现有的钱包 (link)。
正如我在上面的问题中所解释的，create_wallet 无法恢复电子钱包，因为基础 POST /v1/wallet 失败。在@Arty 的建议下，这已被证明如下：
curl -X POST -H "X-KMD-API-Token: <kmd-token>" -H "Content-Type: application/json" -d '{"wallet_driver_name": "sqlite","wallet_name": <wallet-name>,"wallet_password": <wallet-password>,"master_derivation_key": <master-derivation-key>}' <kmd-address-and-port>/v1/wallet
返回的
{ "error": true,"message": "wallet with same name already exists" }
我将此问题通知了 Algorand 支持，我目前正在等待回复。无论如何，为了让问题的标题有意义，我想分享另一种可能的解决方案，通过依赖 Python SDK 来恢复钱包：
from algosdk import kmd
from algosdk import wallet
from algosdk import mnemonic
kmd_clt = kmd.KMDClient(<kmd-token>,<kmd-address-and-port>)
if kmd_clt:
kmd_wlt_mdk = None
kmd_wlt_list = kmd_clt.list_wallets()
for kmd_wlt in kmd_wlt_list:
kmd_name = kmd_wlt['name']
kmd_id = kmd_wlt['id']
if kmd_name == <wallet-name>:
kmd_wlt_hdl = kmd_clt.init_wallet_handle(kmd_id,<wallet-password>)
if kmd_wlt_hdl:
kmd_wlt_mdk = kmd_clt.export_master_derivation_key(kmd_wlt_hdl,<wallet-password>)
break
if kmd_wlt_mdk:
wlt = wallet.Wallet(<wallet-name>,<wallet-password>,kmd_clt,mdk=kmd_wlt_mdk)
if wlt:
acc_addr_list = wlt.list_keys()
for acc_addr in acc_addr_list:
account_address = acc_addr
print(account_address)
account_key = wlt.export_key(acc_addr)
print(account_key)
account_mnemonic = mnemonic.from_private_key(account_key)
print(account_mnemonic)
我希望它在未来对其他人有用。
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