From b727cd943744bb00b4eadc4ddbfc5ef5708e3038 Mon Sep 17 00:00:00 2001
From: Dhaiwat <dhaiwatpandya@gmail.com>
Date: Sun, 13 Oct 2024 21:17:06 +0530
Subject: [PATCH 1/2] fix: `parseUnits` bug with 0 units

---
 .changeset/tidy-scissors-sip.md | 5 +++++
 packages/math/src/bn.test.ts    | 1 +
 packages/math/src/bn.ts         | 5 +++++
 3 files changed, 11 insertions(+)
 create mode 100644 .changeset/tidy-scissors-sip.md

diff --git a/.changeset/tidy-scissors-sip.md b/.changeset/tidy-scissors-sip.md
new file mode 100644
index 00000000000..5dc64e0a33b
--- /dev/null
+++ b/.changeset/tidy-scissors-sip.md
@@ -0,0 +1,5 @@
+---
+"@fuel-ts/math": patch
+---
+
+fix: `parseUnits` bug with 0 units
diff --git a/packages/math/src/bn.test.ts b/packages/math/src/bn.test.ts
index 02750d6cfc9..85ccb4242dc 100644
--- a/packages/math/src/bn.test.ts
+++ b/packages/math/src/bn.test.ts
@@ -475,6 +475,7 @@ describe('Math - BN', () => {
     expect(bn.parseUnits('100,100,100.00002', 5).toHex()).toEqual(bn('10010010000002').toHex());
     expect(bn.parseUnits('.').toHex()).toEqual(bn('0').toHex());
     expect(bn.parseUnits('.', 5).toHex()).toEqual(bn('0').toHex());
+    expect(bn.parseUnits('1', 0).toHex()).toEqual(bn('1').toHex());
 
     expect(() => {
       bn.parseUnits('100,100.000002', 5);
diff --git a/packages/math/src/bn.ts b/packages/math/src/bn.ts
index c849acf750c..3696df16844 100644
--- a/packages/math/src/bn.ts
+++ b/packages/math/src/bn.ts
@@ -322,6 +322,11 @@ bn.parseUnits = (value: string, units: number = DEFAULT_DECIMAL_UNITS): BN => {
   const [valueUnits = '0', valueDecimals = '0'] = valueToParse.split('.');
   const length = valueDecimals.length;
 
+  if (units === 0) {
+    const valueWithoutDecimals = valueToParse.replace(',', '').split('.')[0];
+    return bn(valueWithoutDecimals);
+  }
+
   if (length > units) {
     throw new FuelError(
       ErrorCode.CONVERTING_FAILED,

From 7805a5644ed245f0ba71bd0364b8f81a87a79952 Mon Sep 17 00:00:00 2001
From: Dhaiwat <dhaiwatpandya@gmail.com>
Date: Sun, 13 Oct 2024 23:28:21 +0530
Subject: [PATCH 2/2] add more test cases

---
 packages/math/src/bn.test.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/math/src/bn.test.ts b/packages/math/src/bn.test.ts
index 85ccb4242dc..721fd762ece 100644
--- a/packages/math/src/bn.test.ts
+++ b/packages/math/src/bn.test.ts
@@ -476,6 +476,9 @@ describe('Math - BN', () => {
     expect(bn.parseUnits('.').toHex()).toEqual(bn('0').toHex());
     expect(bn.parseUnits('.', 5).toHex()).toEqual(bn('0').toHex());
     expect(bn.parseUnits('1', 0).toHex()).toEqual(bn('1').toHex());
+    expect(bn.parseUnits('0.000000001', 0).toHex()).toEqual(bn('0').toHex());
+    expect(bn.parseUnits('100.00002', 0).toHex()).toEqual(bn('100').toHex());
+    expect(bn.parseUnits('100,100.00002', 0).toHex()).toEqual(bn('100100').toHex());
 
     expect(() => {
       bn.parseUnits('100,100.000002', 5);