From 06dfcd9a65bcef7c8a5770bd1abae98a4f301352 Mon Sep 17 00:00:00 2001
From: Alex Yang <himself65@outlook.com>
Date: Wed, 12 Nov 2025 14:02:41 -0800
Subject: [PATCH] chore: enable `useDateNow` lint rule (#5938)

---
 biome.json                                                    | 1 +
 demo/nextjs/app/admin/page.tsx                                | 2 +-
 packages/better-auth/src/plugins/api-key/api-key.test.ts      | 4 ++--
 .../better-auth/src/plugins/api-key/routes/verify-api-key.ts  | 4 ++--
 4 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/biome.json b/biome.json
index 2c69f2e7db..2aa4402996 100644
--- a/biome.json
+++ b/biome.json
@@ -20,6 +20,7 @@
         "noDelete": "error"
       },
       "complexity": {
+        "useDateNow": "error",
         "noUselessSwitchCase": "warn",
         "noUselessTypeConstraint": "warn"
       },
diff --git a/demo/nextjs/app/admin/page.tsx b/demo/nextjs/app/admin/page.tsx
index eefa6da08b..000ad5b36a 100644
--- a/demo/nextjs/app/admin/page.tsx
+++ b/demo/nextjs/app/admin/page.tsx
@@ -166,7 +166,7 @@ export default function AdminDashboard() {
 			await client.admin.banUser({
 				userId: banForm.userId,
 				banReason: banForm.reason,
-				banExpiresIn: banForm.expirationDate.getTime() - new Date().getTime(),
+				banExpiresIn: banForm.expirationDate.getTime() - Date.now(),
 			});
 			toast.success("User banned successfully");
 			setIsBanDialogOpen(false);
diff --git a/packages/better-auth/src/plugins/api-key/api-key.test.ts b/packages/better-auth/src/plugins/api-key/api-key.test.ts
index 3213fefc31..db606a046e 100644
--- a/packages/better-auth/src/plugins/api-key/api-key.test.ts
+++ b/packages/better-auth/src/plugins/api-key/api-key.test.ts
@@ -355,7 +355,7 @@ describe("api-key", async () => {
 
 	it("should create an API key with a custom expiresIn", async () => {
 		const expiresIn = 60 * 60 * 24 * 7; // 7 days
-		const expectedResult = new Date().getTime() + expiresIn;
+		const expectedResult = Date.now() + expiresIn;
 		const apiKey = await auth.api.createApiKey({
 			body: {
 				expiresIn: expiresIn,
@@ -1176,7 +1176,7 @@ describe("api-key", async () => {
 
 	it("should update API key expiresIn value", async () => {
 		const expiresIn = 60 * 60 * 24 * 7; // 7 days
-		const expectedResult = new Date().getTime() + expiresIn;
+		const expectedResult = Date.now() + expiresIn;
 		const apiKey = await auth.api.updateApiKey({
 			body: {
 				keyId: firstApiKey.id,
diff --git a/packages/better-auth/src/plugins/api-key/routes/verify-api-key.ts b/packages/better-auth/src/plugins/api-key/routes/verify-api-key.ts
index 2cd0e2561d..f9585b2da7 100644
--- a/packages/better-auth/src/plugins/api-key/routes/verify-api-key.ts
+++ b/packages/better-auth/src/plugins/api-key/routes/verify-api-key.ts
@@ -48,7 +48,7 @@ export async function validateApiKey({
 	}
 
 	if (apiKey.expiresAt) {
-		const now = new Date().getTime();
+		const now = Date.now();
 		const expiresAt = new Date(apiKey.expiresAt).getTime();
 		if (now > expiresAt) {
 			try {
@@ -119,7 +119,7 @@ export async function validateApiKey({
 			code: "USAGE_EXCEEDED" as const,
 		});
 	} else if (remaining !== null) {
-		let now = new Date().getTime();
+		let now = Date.now();
 		const refillInterval = apiKey.refillInterval;
 		const refillAmount = apiKey.refillAmount;
 		let lastTime = new Date(lastRefillAt ?? apiKey.createdAt).getTime();