feat: add promotion codes support to SMS credit purchases (#23774)

Co-authored-by: peer@cal.com <peer@cal.com>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: CarinaWolli <wollencarina@gmail.com>
Co-authored-by: Anik Dhabal Babu <81948346+anikdhabal@users.noreply.github.com>

packages/features/ee/billing/service/billingProvider/StripeBillingService.ts

@@ -44,8 +44,9 @@ export class StripeBillingService implements IBillingProviderService {
     successUrl: string;
     cancelUrl: string;
     metadata?: Record<string, string>;
+    allowPromotionCodes?: boolean;
   }) {
-    const { priceId, quantity, successUrl, cancelUrl, metadata } = args;
+    const { priceId, quantity, successUrl, cancelUrl, metadata, allowPromotionCodes = true } = args;
 
     const session = await this.stripe.checkout.sessions.create({
       line_items: [{ price: priceId, quantity }],
@@ -53,6 +54,7 @@ export class StripeBillingService implements IBillingProviderService {
       success_url: successUrl,
       cancel_url: cancelUrl,
       metadata: metadata,
+      allow_promotion_codes: allowPromotionCodes,
       invoice_creation: {
         enabled: true,
       },

packages/trpc/server/routers/viewer/credits/buyCredits.handler.ts

@@ -77,6 +77,7 @@ export const buyCreditsHandler = async ({ ctx, input }: BuyCreditsOptions) => {
     quantity,
     successUrl: redirectUrl,
     cancelUrl: redirectUrl,
+    allowPromotionCodes: true,
     metadata: {
       ...(teamId && { teamId: teamId.toString() }),
       userId: ctx.user.id.toString(),