From f080fe20ee1bbf7b567ea0a20fbe883a3b7192c8 Mon Sep 17 00:00:00 2001
From: scgbckbone <scgbckbone@proton.me>
Date: Wed, 25 Mar 2026 12:46:26 +0100
Subject: [PATCH] always replace standard derivation from policy with /**
 before saving

---
 shared/wallet.py       |  6 ++---
 testing/conftest.py    |  2 +-
 testing/test_musig2.py | 55 +++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 57 insertions(+), 6 deletions(-)

diff --git a/shared/wallet.py b/shared/wallet.py
index 9f75e6ef..0348d13b 100644
--- a/shared/wallet.py
+++ b/shared/wallet.py
@@ -489,10 +489,7 @@ class MiniScriptWallet(WalletABC):
 
     @staticmethod
     def _from_bip388_wallet_policy(desc_template, keys_info, validate=True):
-        desc_str = bip388_wallet_policy_to_descriptor(
-            desc_template.replace("/<0;1>/*", "/**"),
-            keys_info
-        )
+        desc_str = bip388_wallet_policy_to_descriptor(desc_template, keys_info)
         from descriptor import Descriptor
         desc_obj = Descriptor.from_string(desc_str)
         if validate:
@@ -502,6 +499,7 @@ class MiniScriptWallet(WalletABC):
     @classmethod
     def from_bip388_wallet_policy(cls, name, desc_template, keys_info):
         bip388_validate_policy(desc_template, keys_info)
+        desc_template = desc_template.replace("/<0;1>/*", "/**")
         desc_obj = cls._from_bip388_wallet_policy(desc_template, keys_info)
         msc = cls.from_descriptor_obj(name, desc_obj, desc_template, keys_info)
         return msc
diff --git a/testing/conftest.py b/testing/conftest.py
index c4190287..90fa7866 100644
--- a/testing/conftest.py
+++ b/testing/conftest.py
@@ -3083,7 +3083,7 @@ from test_msg import verify_msg_sign_story, sign_msg_from_text, msg_sign_export,
 from test_multisig import import_ms_wallet, make_multisig, fake_ms_txn
 from test_miniscript import (offer_minsc_import, get_cc_key, bitcoin_core_signer, import_miniscript, usb_miniscript_get,
                              usb_miniscript_addr, create_core_wallet, import_duplicate, address_explorer_check,
-                             miniscript_descriptors)
+                             miniscript_descriptors, usb_miniscript_policy)
 from test_multisig import make_ms_address, make_myself_wallet
 from test_musig2 import build_musig_wallet
 from test_notes import need_some_notes, need_some_passwords, goto_notes
diff --git a/testing/test_musig2.py b/testing/test_musig2.py
index ccc46978..08c16e27 100644
--- a/testing/test_musig2.py
+++ b/testing/test_musig2.py
@@ -1808,4 +1808,57 @@ def test_modify_PSBT_during_musig_signing(tapscript, use_regtest, clear_miniscri
     title, story = cap_story()
     assert "musig needs restart" in story
 
-# EOF
\ No newline at end of file
+
+@pytest.mark.parametrize("der", ["/**", "/<0;1>/*"])
+def test_import_musig_from_b388_policy(der, microsd_path, garbage_collector, clear_miniscript,
+                                       pick_menu_item, need_keypress, cap_story, use_mainnet,
+                                       press_select, usb_miniscript_policy, goto_home,
+                                       usb_miniscript_get):
+    policy = """{
+"name":"MuSig2",
+"desc_template":"tr(musig(@0,@1,@2)%s,{{pk(musig(@0,@1)%s),pk(musig(@1,@2)%s)},pk(musig(@0,@2)%s)})",
+"keys_info":[
+  "[a0d3c79c/48h/0h/0h/3h]xpub6DyCgL3TMMS3trskRyxP6M6iCqSUYPgC4QECKYkubC1L27aYUnPZJwvw57vK56G1t42KQHhX8MrU5zkt9nispkAMXYDLfiiSyrQ9HT1aQoy",
+  "[9a1c8a27/48h/0h/0h/3h]xpub6DmrCyYSAz65fVFRAPEsvLZ5jHZYeF6DvprfYp7754XD2srXQr8kAcayGKhakmWiNe7iVEpjmC9JuqicHAQZk1rpWijrvh2AEwL7WaietUN",
+  "[0f056943/48h/0h/0h/3h]xpub6FQgdFZAHcAeDMVe9KxWoLMxziCjscCExzuKJhRSjM71CA9dUDZEGNgPe4S2SsRumCBXeaTBZ5nKz2cMDiK4UEbGkFXNipHLkm46inpjE9D"]
+}
+"""
+    policy = policy % (der, der, der, der)
+    fname = "musig_b388.json"
+    fpath = microsd_path(fname)
+    with open(fpath, "w") as f:
+        f.write(policy)
+
+    clear_miniscript()
+    use_mainnet()
+    goto_home()
+    pick_menu_item("Settings")
+    pick_menu_item("Multisig/Miniscript")
+    pick_menu_item("Import")
+    need_keypress("1")
+    try:
+        pick_menu_item(fname)
+    except: pass
+
+    time.sleep(.1)
+    title, story = cap_story()
+    assert "Create new miniscript wallet" in story
+    assert "/**" in story
+    assert "/<0;1>/*" not in story
+    press_select()
+    pick_menu_item("MuSig2")
+    pick_menu_item("Descriptors")
+    pick_menu_item("BIP-388 Policy")
+
+    contents = usb_miniscript_policy("MuSig2")
+    assert "/**" in contents["desc_template"]
+    assert "/<0;1>/*" not in contents["desc_template"]
+    if der == "/<0;1>/*":
+        policy = policy.replace(der, "/**")
+    assert json.loads(policy) == contents
+
+    contents = usb_miniscript_get("MuSig2")
+    assert "/**" not in contents["desc"]
+    assert "/<0;1>/*" in contents["desc"]
+
+# EOF