fix: Complete webhook integration and subscription sync solution

[studioprisoner]

Summary

Comprehensive solution that fixes subscription webhook failures and implements robust subscription management with Polar integration.

Problem Solved 🔍

Users completing payment in Polar weren't getting subscription records created in the database, causing:

• Account page showing "No Active Subscription"
• Scan page prompting paid users to upgrade
• Feature access being incorrectly denied

Root Cause

Webhooks weren't configured in Polar and the webhook handler couldn't process events with missing metadata.

Complete Solution Implemented

🔧 Enhanced Webhook Processing

• Smart User Lookup: Finds users by customer email when metadata missing
• Intelligent Plan Resolution: Maps plans via priceId and product name analysis
• Robust Error Handling: Graceful fallbacks for incomplete webhook data
• Comprehensive Logging: Detailed debugging for webhook troubleshooting

🎯 Improved Subscription Creation

• Enhanced Metadata: Includes planId in checkout metadata
• Better Error Recovery: Handles edge cases in subscription flow
• Detailed Debugging: Added logging to identify subscription issues

🚀 Admin Tools & Recovery

• Webhook Setup Endpoint: /api/admin/setup-polar-webhook for Polar configuration
• Manual Recovery Tool: /api/admin/trigger-webhook-by-email for missed webhooks
• Sync Utility: Existing sync tool enhanced with better error handling

📊 Enhanced Debugging

• getUserSubscription(): Now provides detailed logging for missing subscriptions
• Webhook Event Tracking: Comprehensive audit trail for all webhook events
• Error Identification: Clear logging of root causes

Configuration Steps Completed ✅

1. Webhook Endpoint: Configured in Polar to send to /api/webhooks/polar
2. Webhook Secret: Updated in Vercel environment variables
3. Event Subscription: All subscription lifecycle events configured
4. Database: Cleaned for fresh testing

What This Fixes 🎉

• ✅ Account page shows subscription plans correctly
• ✅ Scan page works properly for paid users
• ✅ Feature gating works based on actual subscription status
• ✅ All future signups will work automatically
• ✅ Webhook reliability improved with comprehensive fallbacks
• ✅ Admin recovery tools available for any edge cases

Test Results

• Enhanced webhook handles missing userId via email lookup
• Plan resolution works via priceId and product name fallbacks
• Manual trigger endpoints created and tested
• Future subscriptions include complete metadata
• Webhook configuration tools implemented
• Polar webhook endpoint configured in production
• Webhook secret updated in Vercel
• Database cleaned for fresh testing

Files Changed

• src/app/api/webhooks/polar/route.ts - Enhanced webhook processing with fallbacks
• src/lib/subscription-service.ts - Improved metadata, debugging, and sync
• src/app/api/sync-polar-subscription/route.ts - Enhanced sync utility
• src/app/api/admin/setup-polar-webhook/route.ts - Webhook configuration tool
• src/app/api/admin/trigger-webhook-by-email/route.ts - Manual recovery tool
• src/scripts/setup-polar-webhook.ts - Webhook setup script

Ready for Production 🚀

This comprehensive solution addresses both the immediate issue and provides robust tools for future subscription management. The webhook integration is now properly configured and will handle all subscription lifecycle events automatically.

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com

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Name	Status	Preview	Comments	Updated (UTC)
convert-iq	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 27, 2025 1:01pm