From e1e3081200a71b6c9b0dcf236bc2a37ed1aa7552 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter@wuille.net>
Date: Tue, 9 Nov 2021 23:09:00 -0500
Subject: [PATCH] If P2TR tweaked key is available, sign with it

---
 src/script/sign.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index a3681d26cc..ee4e1aeb11 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -243,6 +243,11 @@ static bool SignTaproot(const SigningProvider& provider, const BaseSignatureCrea
                 sigdata.taproot_key_path_sig = sig;
             }
         }
+        if (sigdata.taproot_key_path_sig.size() == 0) {
+            if (creator.CreateSchnorrSig(provider, sig, output, nullptr, nullptr, SigVersion::TAPROOT)) {
+                sigdata.taproot_key_path_sig = sig;
+            }
+        }
         if (sigdata.taproot_key_path_sig.size()) {
             result = Vector(sigdata.taproot_key_path_sig);
             return true;