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# Phase 2: Reconciliation - COMPLETE ✅
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## Summary
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Phase 2 of the Beancount-inspired refactor focused on **reconciliation and automated balance checking**. This phase builds on Phase 1's foundation to provide robust reconciliation tools that ensure accounting accuracy and catch discrepancies early.
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## Completed Features
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### 1. Balance Assertions ✅
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**Purpose**: Verify account balances match expected values at specific points in time (like Beancount's `balance` directive)
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**Implementation**:
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- **Models** (`models.py:184-219`):
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- `AssertionStatus` enum (pending, passed, failed)
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- `BalanceAssertion` model with sats and optional fiat checks
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- `CreateBalanceAssertion` request model
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- **Database** (`migrations.py:275-320`):
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- `balance_assertions` table with expected/actual balance tracking
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- Tolerance levels for flexible matching
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- Status tracking and timestamps
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- Indexes for performance
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- **CRUD** (`crud.py:773-981`):
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- `create_balance_assertion()` - Create and store assertion
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- `get_balance_assertion()` - Fetch single assertion
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- `get_balance_assertions()` - List with filters
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- `check_balance_assertion()` - Compare expected vs actual
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- `delete_balance_assertion()` - Remove assertion
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- **API Endpoints** (`views_api.py:1067-1230`):
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- `POST /api/v1/assertions` - Create and check assertion
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- `GET /api/v1/assertions` - List assertions with filters
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- `GET /api/v1/assertions/{id}` - Get specific assertion
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- `POST /api/v1/assertions/{id}/check` - Re-check assertion
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- `DELETE /api/v1/assertions/{id}` - Delete assertion
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- **UI** (`templates/castle/index.html:254-378`):
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- Balance Assertions card (super user only)
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- Failed assertions prominently displayed with red banner
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- Passed assertions in collapsible panel
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- Create assertion dialog with validation
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- Re-check and delete buttons
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- **Frontend** (`static/js/index.js:70-79, 602-726`):
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- Data properties and computed values
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- CRUD methods for assertions
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- Automatic loading on page load
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### 2. Reconciliation API Endpoints ✅
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**Purpose**: Provide comprehensive reconciliation tools and reporting
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**Implementation**:
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- **Summary Endpoint** (`views_api.py:1236-1287`):
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- `GET /api/v1/reconciliation/summary`
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- Returns counts of assertions by status
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- Returns counts of journal entries by flag
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- Total accounts count
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- Last checked timestamp
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- **Check All Endpoint** (`views_api.py:1290-1325`):
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- `POST /api/v1/reconciliation/check-all`
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- Re-checks all balance assertions
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- Returns summary of results (passed/failed/errors)
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- Useful for manual reconciliation runs
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- **Discrepancies Endpoint** (`views_api.py:1328-1357`):
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- `GET /api/v1/reconciliation/discrepancies`
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- Returns all failed assertions
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- Returns all flagged journal entries
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- Returns all pending entries
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- Total discrepancy count
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### 3. Reconciliation UI Dashboard ✅
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**Purpose**: Visual dashboard for reconciliation status and quick access to reconciliation tools
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**Implementation** (`templates/castle/index.html:380-499`):
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- **Summary Cards**:
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- Balance Assertions stats (total, passed, failed, pending)
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- Journal Entries stats (total, cleared, pending, flagged)
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- Total Accounts count with last checked timestamp
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- **Discrepancies Alert**:
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- Warning banner when discrepancies found
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- Shows count of failed assertions and flagged entries
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- "View Details" button to expand discrepancy list
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- **Discrepancy Details**:
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- Failed assertions list with expected vs actual balances
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- Flagged entries list
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- Quick access to problematic transactions
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- **Actions**:
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- "Check All" button to run full reconciliation
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- Loading states during checks
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- Success message when all accounts reconciled
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**Frontend** (`static/js/index.js:80-85, 727-779, 933-934`):
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- Reconciliation data properties
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- Methods to load summary and discrepancies
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- `runFullReconciliation()` method with notifications
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- Automatic loading on page load for super users
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### 4. Automated Daily Balance Checks ✅
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**Purpose**: Run balance checks automatically on a schedule to catch discrepancies early
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**Implementation**:
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- **Tasks Module** (`tasks.py`):
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- `check_all_balance_assertions()` - Core checking logic
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- `scheduled_daily_reconciliation()` - Scheduled wrapper
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- Results logging and reporting
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- Error handling
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- **API Endpoint** (`views_api.py:1363-1390`):
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- `POST /api/v1/tasks/daily-reconciliation`
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- Can be triggered manually or via cron
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- Returns detailed results
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- Super user only
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- **Documentation** (`DAILY_RECONCILIATION.md`):
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- Comprehensive setup guide
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- Multiple scheduling options (cron, systemd, k8s)
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- Monitoring and troubleshooting
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- Best practices
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- Example scripts
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## Benefits
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### Accounting Accuracy
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- ✅ Catch data entry errors early
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- ✅ Verify balances at critical checkpoints
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- ✅ Build confidence in accounting accuracy
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- ✅ Required for external audits
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### Operational Excellence
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- ✅ Automated daily checks reduce manual work
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- ✅ Dashboard provides at-a-glance reconciliation status
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- ✅ Discrepancies are immediately visible
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- ✅ Historical tracking of assertions
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### Developer Experience
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- ✅ Clean API for programmatic reconciliation
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- ✅ Well-documented scheduling options
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- ✅ Flexible tolerance levels
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- ✅ Comprehensive error reporting
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## File Changes
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### New Files Created
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1. `tasks.py` - Background tasks for automated reconciliation
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2. `DAILY_RECONCILIATION.md` - Setup and scheduling documentation
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3. `PHASE2_COMPLETE.md` - This file
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### Modified Files
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1. `models.py` - Added `BalanceAssertion`, `CreateBalanceAssertion`, `AssertionStatus`
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2. `migrations.py` - Added `m007_balance_assertions` migration
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3. `crud.py` - Added balance assertion CRUD operations
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4. `views_api.py` - Added assertion, reconciliation, and task endpoints
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5. `templates/castle/index.html` - Added assertions and reconciliation UI
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6. `static/js/index.js` - Added assertion and reconciliation functionality
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7. `BEANCOUNT_PATTERNS.md` - Updated roadmap to mark Phase 2 complete
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## API Endpoints Summary
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### Balance Assertions
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- `POST /api/v1/assertions` - Create assertion
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- `GET /api/v1/assertions` - List assertions
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- `GET /api/v1/assertions/{id}` - Get assertion
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- `POST /api/v1/assertions/{id}/check` - Re-check assertion
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- `DELETE /api/v1/assertions/{id}` - Delete assertion
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### Reconciliation
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- `GET /api/v1/reconciliation/summary` - Get reconciliation summary
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- `POST /api/v1/reconciliation/check-all` - Check all assertions
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- `GET /api/v1/reconciliation/discrepancies` - Get discrepancies
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### Automated Tasks
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- `POST /api/v1/tasks/daily-reconciliation` - Run daily reconciliation check
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## Usage Examples
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### Create a Balance Assertion
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```bash
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curl -X POST http://localhost:5000/castle/api/v1/assertions \
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-H "X-Api-Key: ADMIN_KEY" \
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-H "Content-Type: application/json" \
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-d '{
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"account_id": "lightning",
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"expected_balance_sats": 268548,
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"tolerance_sats": 100
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}'
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```
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### Get Reconciliation Summary
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```bash
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curl http://localhost:5000/castle/api/v1/reconciliation/summary \
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-H "X-Api-Key: ADMIN_KEY"
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```
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### Run Full Reconciliation
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```bash
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curl -X POST http://localhost:5000/castle/api/v1/reconciliation/check-all \
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-H "X-Api-Key: ADMIN_KEY"
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```
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### Schedule Daily Reconciliation (Cron)
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```bash
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# Add to crontab
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0 2 * * * curl -X POST http://localhost:5000/castle/api/v1/tasks/daily-reconciliation -H "X-Api-Key: ADMIN_KEY"
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```
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## Testing Checklist
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- [x] Create balance assertion (UI)
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- [x] Create balance assertion (API)
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- [x] Assertion passes when balance matches
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- [x] Assertion fails when balance doesn't match
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- [x] Tolerance levels work correctly
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- [x] Fiat balance assertions work
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- [x] Re-check assertion updates status
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- [x] Delete assertion removes it
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- [x] Reconciliation summary shows correct stats
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- [x] Check all assertions endpoint works
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- [x] Discrepancies endpoint returns correct data
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- [x] Dashboard displays summary correctly
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- [x] Discrepancy alert shows when issues exist
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- [x] "Check All" button triggers reconciliation
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- [x] Daily reconciliation task executes successfully
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- [x] Failed assertions are logged
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- [x] All endpoints require super user access
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## Next Steps
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**Phase 3: Core Logic Refactoring (Medium Priority)**
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- Create `core/` module with pure accounting logic
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- Implement `CastleInventory` for position tracking
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- Move balance calculation to `core/balance.py`
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- Add comprehensive validation in `core/validation.py`
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**Phase 4: Validation Plugins (Medium Priority)**
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- Create plugin system architecture
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- Implement `check_balanced` plugin
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- Implement `check_receivables` plugin
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- Add plugin configuration UI
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**Phase 5: Advanced Features (Low Priority)**
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- Add tags and links to entries
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- Implement query language
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- Add lot tracking to inventory
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- Support multi-currency in single entry
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## Conclusion
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Phase 2 successfully implements Beancount's reconciliation philosophy in the Castle extension. With balance assertions, comprehensive reconciliation APIs, a visual dashboard, and automated daily checks, users can:
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- **Trust their data** with automated verification
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- **Catch errors early** through regular reconciliation
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- **Save time** with automated daily checks
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- **Gain confidence** in their accounting accuracy
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The implementation follows Beancount's best practices while adapting to LNbits' architecture and use case. All reconciliation features are admin-only, ensuring proper access control for sensitive accounting operations.
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**Phase 2 Status**: ✅ COMPLETE
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---
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*Generated: 2025-10-23*
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*Next: Phase 3 - Core Logic Refactoring*
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