From 222cdd8edad3b024411b100164ca8017eb6bc845 Mon Sep 17 00:00:00 2001
From: Karelian Pie <devkarelianpie@gmail.com>
Date: Tue, 6 Jun 2023 15:24:41 +0300
Subject: [PATCH 1/3] feat: Add `isZero` helper

---
 packages/web-lib/utils/isZero.test.ts | 33 +++++++++++++++++++++++++++
 packages/web-lib/utils/isZero.ts      | 27 ++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 packages/web-lib/utils/isZero.test.ts
 create mode 100644 packages/web-lib/utils/isZero.ts

diff --git a/packages/web-lib/utils/isZero.test.ts b/packages/web-lib/utils/isZero.test.ts
new file mode 100644
index 00000000..a02d19fe
--- /dev/null
+++ b/packages/web-lib/utils/isZero.test.ts
@@ -0,0 +1,33 @@
+import {isZero} from '@yearn-finance/web-lib/utils/isZero';
+
+describe('isZero function', (): void => {
+	test('returns false when no argument given', (): void => {
+		expect(isZero()).toBe(false);
+	});
+
+	test.each([
+		[0, true],
+		['0', true],
+		['0.0', true],
+		['000', true],
+		[0n, true],
+		[`${0}`, true],
+		[' 0 ', true],
+		[' 0.00 ', true],
+		['-0', true],
+		[null, false],
+		[undefined, false],
+		[-1, false],
+		['1', false],
+		[1, false],
+		['-1', false],
+		['0.1', false],
+		[1n, false],
+		['abc', false],
+		[NaN, false],
+		['', false],
+		['  ', false]
+	])('isZero(%p) should return %s', (input, expected): void => {
+		expect(isZero(input)).toBe(expected);
+	});
+});
diff --git a/packages/web-lib/utils/isZero.ts b/packages/web-lib/utils/isZero.ts
new file mode 100644
index 00000000..64abde0d
--- /dev/null
+++ b/packages/web-lib/utils/isZero.ts
@@ -0,0 +1,27 @@
+type TProps = bigint | number | string | null;
+
+export function isZero(value?: TProps): boolean {
+	if (value === null || value === undefined || value === "") {
+		return false;
+	}
+
+	if (typeof value === "string") {
+		value = value.trim();
+
+		if (value === "") {
+			return false;
+		}
+
+		// Check if the string can be parsed as a floating-point number
+		const parsed = Number(value);
+		if (!isNaN(parsed)) {
+			return parsed === 0;
+		}
+	}
+
+	try {
+		return BigInt(value) === 0n;
+	} catch {
+		return false;
+	}
+}

From e670177ea021c9ad7599877318d3c4c4b2e3080c Mon Sep 17 00:00:00 2001
From: Karelian Pie <devkarelianpie@gmail.com>
Date: Tue, 6 Jun 2023 15:31:37 +0300
Subject: [PATCH 2/3] fix: Remove unnecessary check

---
 packages/web-lib/utils/isZero.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/web-lib/utils/isZero.ts b/packages/web-lib/utils/isZero.ts
index 64abde0d..50f2f1a0 100644
--- a/packages/web-lib/utils/isZero.ts
+++ b/packages/web-lib/utils/isZero.ts
@@ -1,7 +1,7 @@
 type TProps = bigint | number | string | null;
 
 export function isZero(value?: TProps): boolean {
-	if (value === null || value === undefined || value === "") {
+	if (value === null || value === undefined) {
 		return false;
 	}
 

From 49697199ff0416c74333701a6c86d5eefeaf2d46 Mon Sep 17 00:00:00 2001
From: Karelian Pie <devkarelianpie@gmail.com>
Date: Thu, 8 Jun 2023 10:28:55 +0300
Subject: [PATCH 3/3] feat: Add support for 0,0

---
 packages/web-lib/utils/isZero.test.ts | 1 +
 packages/web-lib/utils/isZero.ts      | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/web-lib/utils/isZero.test.ts b/packages/web-lib/utils/isZero.test.ts
index a02d19fe..caa2806b 100644
--- a/packages/web-lib/utils/isZero.test.ts
+++ b/packages/web-lib/utils/isZero.test.ts
@@ -9,6 +9,7 @@ describe('isZero function', (): void => {
 		[0, true],
 		['0', true],
 		['0.0', true],
+		['0,0', true],
 		['000', true],
 		[0n, true],
 		[`${0}`, true],
diff --git a/packages/web-lib/utils/isZero.ts b/packages/web-lib/utils/isZero.ts
index 50f2f1a0..daef2a05 100644
--- a/packages/web-lib/utils/isZero.ts
+++ b/packages/web-lib/utils/isZero.ts
@@ -6,7 +6,7 @@ export function isZero(value?: TProps): boolean {
 	}
 
 	if (typeof value === "string") {
-		value = value.trim();
+		value = value.trim().replace(',', '.');
 
 		if (value === "") {
 			return false;