From 01a6f2b2a5dc738a81bac667a1369cf8c900f9a8 Mon Sep 17 00:00:00 2001
From: Andrew Chow <github@achow101.com>
Date: Mon, 7 Nov 2022 18:23:45 -0500
Subject: [PATCH] interfaces: Add isChange to wallet interface

---
 src/interfaces/wallet.h   | 3 +++
 src/wallet/interfaces.cpp | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/src/interfaces/wallet.h b/src/interfaces/wallet.h
index 0789e4bb1eb..bdc138b7177 100644
--- a/src/interfaces/wallet.h
+++ b/src/interfaces/wallet.h
@@ -124,6 +124,9 @@ class Wallet
     //! Save or remove receive request.
     virtual bool setAddressReceiveRequest(const CTxDestination& dest, const std::string& id, const std::string& value) = 0;
 
+    //! Whether the given output is a change
+    virtual bool isChange(const CTxOut& txout) const = 0;
+
     //! Display address on external signer
     virtual bool displayAddress(const CTxDestination& dest) = 0;
 
diff --git a/src/wallet/interfaces.cpp b/src/wallet/interfaces.cpp
index d082dd3c214..1b87910732f 100644
--- a/src/wallet/interfaces.cpp
+++ b/src/wallet/interfaces.cpp
@@ -245,6 +245,11 @@ class WalletImpl : public Wallet
         return value.empty() ? m_wallet->EraseAddressReceiveRequest(batch, dest, id)
                              : m_wallet->SetAddressReceiveRequest(batch, dest, id, value);
     }
+    bool isChange(const CTxOut& txout) const override
+    {
+        LOCK(m_wallet->cs_wallet);
+        return OutputIsChange(*m_wallet, txout);
+    }
     bool displayAddress(const CTxDestination& dest) override
     {
         LOCK(m_wallet->cs_wallet);