feat: Use dub.customer.list to issue dual-sided incentives

apps/api/v1/pages/api/teams/_post.ts

@@ -2,6 +2,7 @@ import type { NextApiRequest } from "next";
 
 import { getStripeCustomerIdFromUserId } from "@calcom/app-store/stripepayment/lib/customer";
 import stripe from "@calcom/app-store/stripepayment/lib/server";
+import { getDubCustomer } from "@calcom/features/auth/lib/dub";
 import { IS_PRODUCTION } from "@calcom/lib/constants";
 import { IS_TEAM_BILLING_ENABLED, WEBAPP_URL } from "@calcom/lib/constants";
 import { HttpError } from "@calcom/lib/http-error";
@@ -192,11 +193,26 @@ const generateTeamCheckoutSession = async ({
   pendingPaymentTeamId: number;
   ownerId: number;
 }) => {
-  const customer = await getStripeCustomerIdFromUserId(ownerId);
+  const [customer, dubCustomer] = await Promise.all([
+    getStripeCustomerIdFromUserId(ownerId),
+    getDubCustomer(ownerId.toString()),
+  ]);
+
   const session = await stripe.checkout.sessions.create({
     customer,
     mode: "subscription",
-    allow_promotion_codes: true,
+    ...(dubCustomer?.discount?.couponId
+      ? {
+          discounts: [
+            {
+              coupon:
+                process.env.NODE_ENV !== "production" && dubCustomer.discount.couponTestId
+                  ? dubCustomer.discount.couponTestId
+                  : dubCustomer.discount.couponId,
+            },
+          ],
+        }
+      : { allow_promotion_codes: true }),
     success_url: `${WEBAPP_URL}/api/teams/api/create?session_id={CHECKOUT_SESSION_ID}`,
     cancel_url: `${WEBAPP_URL}/settings/my-account/profile`,
     line_items: [

packages/features/auth/lib/dub.ts

@@ -3,3 +3,13 @@ import { Dub } from "dub";
 export const dub = new Dub({
   token: process.env.DUB_API_KEY,
 });
+
+// fetch Dub customer using their external ID (ID in our database)
+export const getDubCustomer = async (userId: string) => {
+  const customer = await dub.customers.list({
+    externalId: userId,
+    includeExpandedFields: true,
+  });
+
+  return customer.length > 0 ? customer[0] : null;
+};

packages/features/auth/package.json

@@ -13,7 +13,7 @@
     "@calcom/trpc": "*",
     "@calcom/ui": "*",
     "bcryptjs": "^2.4.3",
-    "dub": "^0.35.0",
+    "dub": "^0.46.10",
     "handlebars": "^4.7.7",
     "jose": "^4.13.1",
     "lru-cache": "^9.0.3",