From a8bf3d05a7fed2f62f2494593af584df66b47583 Mon Sep 17 00:00:00 2001
From: yinyiqian1 <yqian@ripple.com>
Date: Wed, 16 Sep 2026 17:32:44 -0400
Subject: [PATCH] add fee test

---
 src/test/app/ConfidentialTransfer_test.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/test/app/ConfidentialTransfer_test.cpp b/src/test/app/ConfidentialTransfer_test.cpp
index a964193c1a..e6859d8d3d 100644
--- a/src/test/app/ConfidentialTransfer_test.cpp
+++ b/src/test/app/ConfidentialTransfer_test.cpp
@@ -7123,6 +7123,18 @@ class ConfidentialTransfer_test : public ConfidentialTransferTestBase
                 mptAlice.confidentialClaw(
                     {.account = alice, .holder = carol, .amt = 15, .fee = expectedFee});
             });
+
+            // Check fee for the mirror update transaction.
+            Account const newIssuerKey("newIssuerKey");
+            mptAlice.generateKeyPair(newIssuerKey);
+            mptAlice.set({.account = alice, .issuerPubKey = mptAlice.getPubKey(newIssuerKey)});
+            checkFee(alice, [&]() {
+                mptAlice.mirrorUpdate(
+                    {.account = alice,
+                     .holder = bob,
+                     .issuerEncryptedAmount = getTrivialCiphertext(),
+                     .fee = expectedFee});
+            });
         }
 
         // test insufficient fee for confidential transactions
@@ -7154,6 +7166,12 @@ class ConfidentialTransfer_test : public ConfidentialTransferTestBase
                  .amt = 1,
                  .fee = baseFee,
                  .err = telINSUF_FEE_P});
+            mptAlice.mirrorUpdate(
+                {.account = alice,
+                 .holder = bob,
+                 .issuerEncryptedAmount = getTrivialCiphertext(),
+                 .fee = baseFee,
+                 .err = telINSUF_FEE_P});
         }
 
         // test excessive fee for confidential transactions