From b65cea53df99f9dd43af5f60078765bd8e5e84bb Mon Sep 17 00:00:00 2001
From: Konstantin Akimov <knstqq@gmail.com>
Date: Tue, 29 Aug 2023 14:39:50 +0700
Subject: [PATCH] partial (missing function GetKeyForDestination) Merge #11403:
 SegWit wallet support

---
 src/script/signingprovider.cpp | 10 ++++++++++
 src/script/signingprovider.h   |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/src/script/signingprovider.cpp b/src/script/signingprovider.cpp
index fd5231519bde5..7ce92a546336d 100644
--- a/src/script/signingprovider.cpp
+++ b/src/script/signingprovider.cpp
@@ -150,3 +150,13 @@ bool FillableSigningProvider::GetCScript(const CScriptID &hash, CScript& redeemS
     }
     return false;
 }
+
+CKeyID GetKeyForDestination(const SigningProvider& store, const CTxDestination& dest)
+{
+    // Only supports destinations which map to single public keys, i.e. P2PKH
+    const PKHash *pkhash = std::get_if<PKHash>(&dest);
+
+    if (pkhash != nullptr) return ToKeyID(*pkhash);
+
+    return CKeyID();
+}
diff --git a/src/script/signingprovider.h b/src/script/signingprovider.h
index 468dbb4a0674b..8ab2793a5b5d8 100644
--- a/src/script/signingprovider.h
+++ b/src/script/signingprovider.h
@@ -131,4 +131,7 @@ class FillableSigningProvider : public SigningProvider
     virtual bool GetCScript(const CScriptID &hash, CScript& redeemScriptOut) const override;
 };
 
+/** Return the CKeyID of the key involved in a script (if there is a unique one). */
+CKeyID GetKeyForDestination(const SigningProvider& store, const CTxDestination& dest);
+
 #endif // BITCOIN_SCRIPT_SIGNINGPROVIDER_H