feat: stripe plugin to handle subscriptions and customers (#1588)

* init

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* feat(stripe): enable subscription support and update pricing plans

* feat(stripe): add Vitest configuration and initial tests for Stripe integration

* feat(stripe): implement setCookieToHeader function and update tests for customer creation and subscription handling

* feat(stripe): add seats support for subscriptions and update related endpoints

* feat(stripe): update schema to include unique referenceId, stripeSubscriptionId, and periodEnd fields

* wip docs

* docs

* docs: imporves

* fix(stripe): update webhook handlers to use correct subscription identification

* refactor(stripe): simplify customer management by storing Stripe customer ID directly on user

* chore(stripe): update package configuration and build setup

- Migrated from tsup to unbuild for build configuration
- Updated package.json with improved export and dependency management
- Added build configuration for better module support
- Removed tsup configuration file

* chore(stripe): update pnpm lockfile dependencies

- Moved `better-auth` from devDependencies to dependencies
- Added `zod` as a direct dependency
- Reorganized package dependencies in the lockfile

* feat(stripe): enhance subscription management and error handling

- Added toast error handling for subscription upgrades in the dashboard
- Updated Stripe price IDs for different plans
- Improved Stripe plugin documentation with beta warning and team subscription details
- Implemented intermediate redirect for checkout success to handle race conditions
- Added support for fetching and updating subscription status after checkout
- Fixed Next.js cookie handling and build configuration

* chore: update snapshot

demo/nextjs/lib/auth.ts

@@ -18,6 +18,9 @@ import { MysqlDialect } from "kysely";
 import { createPool } from "mysql2/promise";
 import { nextCookies } from "better-auth/next-js";
 import { passkey } from "better-auth/plugins/passkey";
+import { stripe } from "@better-auth/stripe";
+import { Stripe } from "stripe";
+import Database from "better-sqlite3";
 
 const from = process.env.BETTER_AUTH_EMAIL || "delivered@resend.dev";
 const to = process.env.TEST_EMAIL || "";
@@ -37,12 +40,18 @@ if (!dialect) {
 	throw new Error("No dialect found");
 }
 
+const PROFESSION_PRICE_ID = {
+	default: "price_1QxWZ5LUjnrYIrml5Dnwnl0X",
+	annual: "price_1QxWZTLUjnrYIrmlyJYpwyhz",
+};
+const STARTER_PRICE_ID = {
+	default: "price_1QxWWtLUjnrYIrmleljPKszG",
+	annual: "price_1QxWYqLUjnrYIrmlonqPThVF",
+};
+
 export const auth = betterAuth({
 	appName: "Better Auth Demo",
-	database: {
-		dialect,
-		type: "sqlite",
-	},
+	database: new Database("./stripe.db"),
 	emailVerification: {
 		async sendVerificationEmail({ user, url }) {
 			const res = await resend.emails.send({
@@ -149,5 +158,31 @@ export const auth = betterAuth({
 			loginPage: "/sign-in",
 		}),
 		oneTap(),
+		stripe({
+			stripeClient: new Stripe(process.env.STRIPE_KEY!),
+			stripeWebhookSecret: process.env.STRIPE_WEBHOOK_SECRET!,
+			subscription: {
+				enabled: true,
+				requireEmailVerification: true,
+				plans: [
+					{
+						name: "Starter",
+						priceId: STARTER_PRICE_ID.default,
+						annualDiscountPriceId: STARTER_PRICE_ID.annual,
+						freeTrial: {
+							days: 7,
+						},
+					},
+					{
+						name: "Professional",
+						priceId: PROFESSION_PRICE_ID.default,
+						annualDiscountPriceId: PROFESSION_PRICE_ID.annual,
+					},
+					{
+						name: "Enterprise",
+					},
+				],
+			},
+		}),
 	],
 });