multisig wallet order does not matter

releases/ChangeLog.md

@@ -1,3 +1,6 @@
+## 4.1.6 - June 6, 2022
+- Bugfix: order of multisig wallet registration does NOT matter in PSBT signing
+
 ## 4.1.5 - May 4, 2022
 
 - Enhancement: Support P2TR outputs (pay to Taproot) in PSBT files. Allows

shared/multisig.py

@@ -278,6 +278,9 @@ class MultisigWallet:
         # the same prefix path per-each xfp, as indicated 
         # xfp_paths (unordered)?
         # - could also check non-prefix part is all non-hardened
+        if len(xfp_paths) != len(self.xfp_paths):
+            # cannot be the same if  len(w0.N) != len(w1.N)
+            return False
         for x in xfp_paths:
             if x[0] not in self.xfp_paths:
                 return False

shared/psbt.py

@@ -1071,8 +1071,7 @@ class psbtObject(psbtProxy):
             assert N == len(xfp_paths) 
 
             for c in candidates:
-                if c.M == M:
-                    assert c.N == N
+                if c.M == M and c.N == N:
                     self.active_multisig = c
                     break