From 4aac190a6abf9c56d10c11b1ec2d06d40191f8e7 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Thu, 31 Oct 2024 14:25:18 -0400
Subject: [PATCH] [FOLD] Make use of the deep freeze flags malformed prior to
 accepting the amendment.

---
 src/xrpld/app/tx/detail/SetTrust.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/xrpld/app/tx/detail/SetTrust.cpp b/src/xrpld/app/tx/detail/SetTrust.cpp
index 9421990f5e0..5ea86e88d79 100644
--- a/src/xrpld/app/tx/detail/SetTrust.cpp
+++ b/src/xrpld/app/tx/detail/SetTrust.cpp
@@ -429,11 +429,17 @@ SetTrust::doApply()
         if (bSetDeepFreeze && !bClearDeepFreeze &&
             (willSetFreeze || alreadyFrozen))
         {
-            uFlagsOut |= (bHigh ? lsfHighDeepFreeze : lsfLowDeepFreeze);
+            if (ctx_.view().rules().enabled(featureDeepFreeze))
+                uFlagsOut |= (bHigh ? lsfHighDeepFreeze : lsfLowDeepFreeze);
+            else
+                return temMALFORMED;
         }
         else if (bClearDeepFreeze && !bSetDeepFreeze)
         {
-            uFlagsOut &= ~(bHigh ? lsfHighDeepFreeze : lsfLowDeepFreeze);
+            if (ctx_.view().rules().enabled(featureDeepFreeze))
+                uFlagsOut &= ~(bHigh ? lsfHighDeepFreeze : lsfLowDeepFreeze);
+            else
+                return temMALFORMED;
         }
 
         if (QUALITY_ONE == uLowQualityOut)