test: use ExtendedPrivateKey in wallet_descriptor.py

test/functional/wallet_descriptor.py

@@ -12,6 +12,8 @@ except ImportError:
 import re
 
 from test_framework.blocktools import COINBASE_MATURITY
+from test_framework.descriptors import descsum_create
+from test_framework.extendedkey import ExtendedPrivateKey
 from test_framework.messages import ser_string
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
@@ -173,7 +175,7 @@ class WalletDescriptorTest(BitcoinTestFramework):
         self.log.info("Test that unlock is needed when deriving only hardened keys in an encrypted wallet")
         with WalletUnlock(send_wrpc, "pass"):
             send_wrpc.importdescriptors([{
-                "desc": "wpkh(tprv8ZgxMBicQKsPd7Uf69XL1XwhmjHopUGep8GuEiJDZmbQz6o58LninorQAfcKZWARbtRtfnLcJ5MQ2AtHcQJCCRUcMRvmDUjyEmNUWwx8UbK/0h/*h)#y4dfsj7n",
+                "desc": descsum_create(f"wpkh({ExtendedPrivateKey.generate().to_string()}/0h/*h)"),
                 "timestamp": "now",
                 "range": [0,10],
                 "active": True