From 55373cb614dbafbcda40d76a2f4438a0056ae94e Mon Sep 17 00:00:00 2001
From: Julien Robert <julien@rbrt.fr>
Date: Sun, 25 Sep 2022 11:19:50 +0200
Subject: [PATCH] feat: add uint `IsNil` method (#13381)

---
 math/CHANGELOG.md | 1 +
 math/uint.go      | 5 +++++
 math/uint_test.go | 5 +++++
 3 files changed, 11 insertions(+)

diff --git a/math/CHANGELOG.md b/math/CHANGELOG.md
index 4354b122f63a..3b7c8e741ff7 100644
--- a/math/CHANGELOG.md
+++ b/math/CHANGELOG.md
@@ -31,4 +31,5 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+* [#13381](https://github.com/cosmos/cosmos-sdk/pull/13381) Add uint `IsNil` method.
 * [#12634](https://github.com/cosmos/cosmos-sdk/pull/12634) Move `sdk.Dec` to math package, call it `LegacyDec`.
diff --git a/math/uint.go b/math/uint.go
index 8ce6105e9fb0..81da2d9ef8d5 100644
--- a/math/uint.go
+++ b/math/uint.go
@@ -18,6 +18,11 @@ func (u Uint) BigInt() *big.Int {
 	return new(big.Int).Set(u.i)
 }
 
+// IsNil returns true if Uint is uninitialized
+func (u Uint) IsNil() bool {
+	return u.i == nil
+}
+
 // NewUintFromBigUint constructs Uint from big.Uint
 func NewUintFromBigInt(i *big.Int) Uint {
 	u, err := checkNewUint(i)
diff --git a/math/uint_test.go b/math/uint_test.go
index 3077e5094181..428672cb2cea 100644
--- a/math/uint_test.go
+++ b/math/uint_test.go
@@ -91,6 +91,11 @@ func (s *uintTestSuite) TestUintPanics() {
 	s.Require().True(sdkmath.ZeroUint().LTE(sdkmath.OneUint()))
 }
 
+func (s *uintTestSuite) TestIsNil() {
+	s.Require().False(sdkmath.OneUint().IsNil())
+	s.Require().True(sdkmath.Uint{}.IsNil())
+}
+
 func (s *uintTestSuite) TestArithUint() {
 	for d := 0; d < 1000; d++ {
 		n1 := uint64(rand.Uint32())