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src/app/api/stripe/cancel-subscription/route.ts

@@ -2,10 +2,32 @@ import { NextRequest, NextResponse } from 'next/server';
 import { cookies } from 'next/headers';
 import { stripe } from '@/lib/stripe';
 import { db } from '@/lib/db';
+import { rateLimit, getClientIdentifier, RateLimits } from '@/lib/rateLimit';
 
 export async function POST(request: NextRequest) {
   try {
     const userId = cookies().get('userId')?.value;
+
+    // Rate Limiting (user-based)
+    const clientId = userId || getClientIdentifier(request);
+    const rateLimitResult = rateLimit(clientId, RateLimits.STRIPE_CANCEL);
+
+    if (!rateLimitResult.success) {
+      return NextResponse.json(
+        {
+          error: 'Too many requests. Please try again later.',
+          retryAfter: Math.ceil((rateLimitResult.reset - Date.now()) / 1000)
+        },
+        {
+          status: 429,
+          headers: {
+            'X-RateLimit-Limit': rateLimitResult.limit.toString(),
+            'X-RateLimit-Remaining': rateLimitResult.remaining.toString(),
+            'X-RateLimit-Reset': rateLimitResult.reset.toString(),
+          }
+        }
+      );
+    }
     if (!userId) {
       return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
     }