# Suspense Feature Updates

Date: 2026-06-20

This document summarizes recent updates made to LendCore's suspense handling and admin UI to improve handling of non-STK C2B confirmations (including payloads with null `BillRefNumber`) and to surface payload details for manual review.

## Summary of changes

- Treat `BillRefNumber === null` as an unmatched payment and save to `suspense_transactions` instead of rejecting the payload.
- Make saving to suspense idempotent by `TransID` to avoid duplicate records when replaying confirmations.
- Surface key payload fields in the admin listing and detail views to make manual reassignment easier.
- Add a toggleable per-transaction "View Payload" panel in the Suspense index to display the full original payload in key/value format.

## Files modified

- `app/Http/Controllers/Api/MpesaCallbackController.php`
  - `c2bConfirmation()` now only rejects payloads missing `TransID` or with non-positive `TransAmount`.
  - Payloads with `BillRefNumber === null` are saved to suspense for manual review.

- `app/Services/SuspenseService.php`
  - `saveUnmatchedTransaction()` now checks for an existing `SuspenseTransaction` with the same `transaction_id` and returns it if present (idempotent save).

- `resources/views/admin/suspense/index.blade.php`
  - Reference column now shows `NULL` explicitly when `bill_ref_number` is null.
  - Added `Customer` column which displays `FirstName` from the original payload (if present).
  - Added a `View Payload` button per row that expands a collapsed panel showing the full payload as key/value tiles.
  - Added client-side JS to toggle the payload panel.

- `resources/views/admin/suspense/show.blade.php`
  - Enhanced detail view to explicitly show `Transaction ID`, `BillRefNumber` (rendered as `NULL` when missing), `FirstName`, and a raw JSON payload block for full context.

## Behavior notes

- Replayed confirmations forwarded from relay-box will no longer create duplicate suspense records if the same `TransID` already exists in `suspense_transactions`.
- `BillRefNumber` may be `NULL` in the payload — this is now considered an unmatched payment that requires manual review.
- In the UI, `NULL` is displayed explicitly (instead of blank) to make it obvious which payloads lack a bill reference.

## How to test

1. Start the application (if not running):

```bash
php artisan serve --host=127.0.0.1 --port=8000
```

2. Visit the Suspense admin page:

```
http://127.0.0.1:8000/admin/suspense
```

3. Verify that rows with missing `BillRefNumber` show `NULL` in the Reference column.
4. Click `View Payload` on a row to expand the payload tile view and confirm key/value rendering.
5. Replay a C2B confirmation payload with `BillRefNumber: null` and the same `TransID` twice — confirm only one `suspense_transactions` record is created.

## Rollback

To revert the UI changes, restore the previous versions of the modified view files from git. To revert behavior changes, restore the previous `MpesaCallbackController` and `SuspenseService` code.

## Follow-ups

- Consider adding server-side logging when an already-existing `transaction_id` is returned by `saveUnmatchedTransaction()` to help diagnose repeated forwards.
- Add unit tests for `SuspenseService::saveUnmatchedTransaction()` to cover idempotency behavior.
