From 5983e90abb1915a198252f49890fb68dcec6d4f9 Mon Sep 17 00:00:00 2001
From: DongLieu <duongduydongtq@gmail.com>
Date: Wed, 25 Oct 2023 11:13:49 +0700
Subject: [PATCH 1/2] add other BigIntMut api for math.Uint

---
 math/uint.go      |  8 ++++++++
 math/uint_test.go | 20 ++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/math/uint.go b/math/uint.go
index be588b0cd342..97177ea7f0fa 100644
--- a/math/uint.go
+++ b/math/uint.go
@@ -21,6 +21,14 @@ func (u Uint) BigInt() *big.Int {
 	return new(big.Int).Set(u.i)
 }
 
+// BigInt converts Uint to big.Int, mutative the input
+func (u Uint) BigIntMut() *big.Int {
+	if u.IsNil() {
+		return nil
+	}
+	return u.i
+}
+
 // IsNil returns true if Uint is uninitialized
 func (u Uint) IsNil() bool {
 	return u.i == nil
diff --git a/math/uint_test.go b/math/uint_test.go
index b75b7514a584..93abdf886dae 100644
--- a/math/uint_test.go
+++ b/math/uint_test.go
@@ -99,6 +99,26 @@ func (s *uintTestSuite) TestIsNil() {
 	s.Require().True(sdkmath.Uint{}.IsNil())
 }
 
+func (s *uintTestSuite) TestConvertToBigIntMutativeForUint() {
+	r := big.NewInt(30)
+	i := sdkmath.NewUintFromBigInt(r)
+
+	// Compare value of BigInt & BigIntMut
+	s.Require().Equal(i.BigInt(), i.BigIntMut())
+
+	// Modify BigIntMut() pointer and ensure i.BigIntMut() & i.BigInt() change
+	p1 := i.BigIntMut()
+	p1.SetInt64(40)
+	s.Require().Equal(big.NewInt(40), i.BigIntMut())
+	s.Require().Equal(big.NewInt(40), i.BigInt())
+
+	// Modify big.Int() pointer and ensure i.BigIntMut() & i.BigInt() don't change
+	p2 := i.BigInt()
+	p2.SetInt64(50)
+	s.Require().NotEqual(big.NewInt(50), i.BigIntMut())
+	s.Require().NotEqual(big.NewInt(50), i.BigInt())
+}
+
 func (s *uintTestSuite) TestArithUint() {
 	for d := 0; d < 1000; d++ {
 		n1 := uint64(rand.Uint32())

From ca09efc9a691519f38f35572d35c372ea6ecb20f Mon Sep 17 00:00:00 2001
From: DongLieu <duongduydongtq@gmail.com>
Date: Wed, 25 Oct 2023 11:21:11 +0700
Subject: [PATCH 2/2] changelog

---
 math/CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/math/CHANGELOG.md b/math/CHANGELOG.md
index 71e3f4b9b4b7..be97b7f21e48 100644
--- a/math/CHANGELOG.md
+++ b/math/CHANGELOG.md
@@ -38,6 +38,7 @@ Ref: https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.j
 
 ### Features
 
+* [#18247](https://github.com/cosmos/cosmos-sdk/pull/18247) Add mutative api for Uint.BigInt()
 * [#17803](https://github.com/cosmos/cosmos-sdk/pull/17803) Add mutative api for Int.BigInt()
 
 ### Bug Fixes