feat(payment): add chat support discounts and gratitude

src/app/subscription/use-subscription-payment-flow.ts

@@ -5,7 +5,11 @@ import { useRouter } from "next/navigation";
 
 import { usePaymentRouteFlow } from "@/app/_hooks/use-payment-route-flow";
 import type { PayChannel } from "@/data/schemas/payment";
-import { DEFAULT_CHARACTER_SLUG } from "@/data/constants/character";
+import {
+  DEFAULT_CHARACTER,
+  DEFAULT_CHARACTER_SLUG,
+  getCharacterBySlug,
+} from "@/data/constants/character";
 import {
   consumeSubscriptionExitUrl,
   resolveSubscriptionSuccessExitUrl,
@@ -19,7 +23,7 @@ export interface UseSubscriptionPaymentFlowInput {
   shouldResumePendingOrder: boolean;
   returnTo: SubscriptionReturnTo;
   initialPayChannel: PayChannel;
-  sourceCharacterSlug?: string;
+  sourceCharacterSlug?: string | null;
   initialPlanId?: string | null;
   initialAutoRenew?: boolean | null;
   commercialOfferId?: string | null;
@@ -40,10 +44,13 @@ export function useSubscriptionPaymentFlow({
   chatActionId = null,
 }: UseSubscriptionPaymentFlowInput) {
   const router = useRouter();
+  const supportCharacter = getCharacterBySlug(sourceCharacterSlug);
+  const exitCharacterSlug = supportCharacter?.slug ?? DEFAULT_CHARACTER.slug;
   const { payment, paymentDispatch } = usePaymentRouteFlow({
     initialPayChannel,
     paymentType: subscriptionType,
     shouldResumePendingOrder,
+    characterId: supportCharacter?.id,
     initialPlanId,
     initialAutoRenew,
     commercialOfferId,
@@ -65,7 +72,7 @@ export function useSubscriptionPaymentFlow({
   const handleBackClick = () => {
     void (async () => {
       router.replace(
-        await consumeSubscriptionExitUrl(returnTo, sourceCharacterSlug),
+        await consumeSubscriptionExitUrl(returnTo, exitCharacterSlug),
       );
     })();
   };
@@ -77,7 +84,7 @@ export function useSubscriptionPaymentFlow({
       router.replace(
         await resolveSubscriptionSuccessExitUrl(
           returnTo,
-          sourceCharacterSlug,
+          exitCharacterSlug,
         ),
       );
     })();