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Changes: - New DB table: `paddle_transactions` tracks all Paddle webhook events for audit/debugging - Idempotent webhooks: Duplicate events ignored via `eventId` uniqueness constraint - Error handling: Distinguishes expected vs unexpected failures, fails webhook appropriately for Paddle retries - Discord notifications: Success, error, refund, and missing `userId` alerts - DB transaction reuse: Refactored upsertFairyAccess to accept DB connection, renamed wrapper to grantFairyAccessWithDb - Critical path: Fairy access grant is critical - webhook fails if it fails so Paddle retries - ### Change type - [x] `other` <!-- CURSOR_SUMMARY --> --- > [!NOTE] > Adds robust Paddle webhook handling with DB-backed idempotency/logging and refactors fairy-access upsert to reuse a provided DB connection. > > - **Payments (Paddle Webhooks)**: > - Add `paddle_transactions` table with indexes to log events, enforce idempotency (`eventId`), and track processing/errors. > - Implement signature verification, event parsing, and per-event row lock (`FOR UPDATE`) to prevent concurrent handling. > - Process `transaction.completed` by granting fairy access via `upsertFairyAccess(..., db)`; mark processed or store errors. > - Send Discord notifications for success, errors, refunds/cancellations, and missing `userId`. > - **Admin/Invites**: > - Refactor `upsertFairyAccess` to accept a DB; add wrapper `upsertFairyAccessWithDb` and update routes (`grant/remove/enable` and invite redemption) to use it. > - **Schema/Migrations**: > - Add `TlaPaddleTransaction` to shared types and `DB` mapping. > - New migration `028_add_paddle_transactions.sql` creating table and indexes. > > <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit c7fb36e. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY -->
Describe what your pull request does. If you can, add GIFs or images showing the before and after of your change. ### Change type - [ ] `bugfix` - [ ] `improvement` - [ ] `feature` - [ ] `api` - [x] `other` <!-- CURSOR_SUMMARY --> --- > [!NOTE] > <sup>[Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) is generating a summary for commit 9dcd1cd. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY -->
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