chore: support allow promotion code in price config

src/config/website.tsx

@@ -119,6 +119,7 @@ export const websiteConfig: WebsiteConfig = {
             priceId: process.env.NEXT_PUBLIC_STRIPE_PRICE_LIFETIME!,
             amount: 19900,
             currency: 'USD',
+            allowPromotionCode: true,
           },
         ],
         isFree: false,

src/payment/provider/stripe.ts

@@ -227,6 +227,7 @@ export class StripeProvider implements PaymentProvider {
         success_url: successUrl ?? '',
         cancel_url: cancelUrl ?? '',
         metadata: customMetadata,
+        allow_promotion_codes: price.allowPromotionCode ?? false,
       };
 
       // Add customer to checkout session

src/payment/types.ts

@@ -46,16 +46,17 @@ export interface Price {
   currency: string;                  // Currency code (e.g., USD)
   interval?: PlanInterval;           // Billing interval for recurring payments
   trialPeriodDays?: number;          // Free trial period in days
+  allowPromotionCode?: boolean;      // Whether to allow promotion code for this price
   disabled?: boolean;                // Whether to disable this price in UI
 }
 
 /**
  * Price plan definition
- * 
+ *
  * 1. When to set the plan disabled?
  * When the plan is not available anymore, but you should keep it for existing users
  * who have already purchased it, otherwise they can not see the plan in the Billing page.
- * 
+ *
  * 2. When to set the price disabled?
  * When the price is not available anymore, but you should keep it for existing users
  * who have already purchased it, otherwise they can not see the price in the Billing page.

src/types/index.d.ts

@@ -1,4 +1,5 @@
 import type { ReactNode } from 'react';
+import type { PricePlan } from '@/payment/types';
 
 /**
  * website config, without translations