# Financial System Audit Report **Date:** 2026-02-02 **Auditor:** Claude (Senior Laravel Architect & Financial Systems Auditor) **System:** Credify Go! - SaaS Credit Management Platform --- ## 1. FINANCIAL FLOW DIAGRAM ``` ┌─────────────────────────────────────────────────────────────────────────────────┐ │ CREDIT LIFECYCLE │ ├─────────────────────────────────────────────────────────────────────────────────┤ │ │ │ ┌──────────────────┐ ┌──────────────────┐ ┌──────────────────┐ │ │ │ CREATE CREDIT │────▶│ GENERATE │────▶│ LOG EXPENSE │ │ │ │ (CreditOps) │ │ INSTALLMENTS │ │ (Disbursement) │ │ │ └──────────────────┘ │ (Calculator) │ │ (FinanceLogger) │ │ │ └──────────────────┘ └────────┬─────────┘ │ │ │ │ │ ▼ │ │ ┌──────────────────┐ │ │ │ FINANCIAL │ │ │ │ OPERATION │ │ │ │ (Audit Record) │ │ │ └──────────────────┘ │ └─────────────────────────────────────────────────────────────────────────────────┘ ┌─────────────────────────────────────────────────────────────────────────────────┐ │ PAYMENT LIFECYCLE │ ├─────────────────────────────────────────────────────────────────────────────────┤ │ │ │ ┌──────────────────┐ ┌──────────────────┐ ┌──────────────────┐ │ │ │ REGISTER │────▶│ DISTRIBUTE │────▶│ MATERIALIZE │ │ │ │ PAYMENT │ │ TO INSTALLMENTS │ │ TOTALS │ │ │ │ (Registrar) │ │ (Distributor) │ │ (Materializer) │ │ │ └──────────────────┘ └──────────────────┘ └────────┬─────────┘ │ │ │ │ │ ┌──────────────────┐ │ │ │ │ SYNC INCOMES │◀──────────────┘ │ │ │ (AutoLogger) │ │ │ │ - payment │ │ │ │ - overpayment │ │ │ └────────┬─────────┘ │ │ │ │ │ ▼ │ │ ┌──────────────────┐ │ │ │ AUDIT LOG │ │ │ │ (PaymentAudit) │ │ │ └──────────────────┘ │ └─────────────────────────────────────────────────────────────────────────────────┘ ┌─────────────────────────────────────────────────────────────────────────────────┐ │ PAYMENT REVERSAL (DELETE) │ ├─────────────────────────────────────────────────────────────────────────────────┤ │ │ │ ┌──────────────────┐ ┌──────────────────┐ ┌──────────────────┐ │ │ │ VALIDATE CAN │────▶│ DETACH │────▶│ DELETE │ │ │ │ DELETE │ │ INSTALLMENTS │ │ INCOMES │ │ │ │ (canDelete) │ │ (revert) │ │ (query builder) │ │ │ └──────────────────┘ └──────────────────┘ └────────┬─────────┘ │ │ │ │ │ ┌──────────────────┐ │ │ │ │ MARK VOIDED │◀──────────────┘ │ │ │ + CREATE │ │ │ │ REVERSAL │ │ │ │ PAYMENT │ │ │ └────────┬─────────┘ │ │ │ │ │ ▼ │ │ ┌──────────────────┐ │ │ │ AUDIT LOG │ │ │ │ (with snapshot) │ │ │ └──────────────────┘ │ └─────────────────────────────────────────────────────────────────────────────────┘ ┌─────────────────────────────────────────────────────────────────────────────────┐ │ CASH BALANCE FORMULA │ ├─────────────────────────────────────────────────────────────────────────────────┤ │ │ │ CASH = Σ(incomes.amount) - Σ(expenses.amount WHERE affects_cash = true) │ │ │ │ Income Sources: Expense Sources: │ │ ├── payment (from payments) ├── disbursement (credit creation) │ │ ├── overpayment (excess) ├── financial_adjustment (operations) │ │ ├── partner_contribution └── operational (business costs) │ │ ├── recovery │ │ ├── extra_charge │ │ └── other_income │ │ │ └─────────────────────────────────────────────────────────────────────────────────┘ ``` --- ## 2. DETECTED BUGS ### BUG #1: Expense Model Blocks Credit Edit Updates (CRITICAL) **Root Cause:** The `Expense` model's `updating` event throws an exception for ALL disbursement expense updates, but `EditCredit.php` calls `FinanceAutoLogger::updateCreditExpense()` which attempts to update the expense. **Files Involved:** - `app/Models/Expense.php:67-73` - blocking rule - `app/Filament/Resources/Credits/Pages/EditCredit.php:200-214` - update call - `app/Services/FinanceAutoLogger.php:143-149` - update method **Error Message:** ``` RuntimeException: No se permite modificar egresos de desembolso. ``` **Business Rule Conflict:** - Rule says: "Editing a credit MUST update its related expense" - Model says: "Disbursement expenses cannot be edited" **Fix:** Allow system-controlled updates via query builder (bypass model events), while maintaining UI edit protection. --- ### BUG #2: FinanceAutoLogger::updateCreditExpense Silently Fails for Protected Expenses **Root Cause:** The method doesn't distinguish between system updates and manual updates. **File:** `app/Services/FinanceAutoLogger.php:143-149` **Fix:** Use query builder for system-controlled updates to bypass model events. --- ### BUG #3: Credit Cancellation Deletes Disbursement Expense (VIOLATION) **Root Cause:** `CreditOperationService::cancelCredit()` calls `FinanceAutoLogger::deleteCreditExpense()` which attempts to delete a disbursement expense, but the model blocks this. **File:** `app/Services/CreditOperationService.php:332` **Error Message:** ``` RuntimeException: No se puede eliminar un egreso financiero. ``` **Fix:** Use query builder for system-controlled deletions. --- ### BUG #4: Income Model Protection Can Block System Operations **Root Cause:** If an Income record is loaded via Eloquent and then deleted, the `deleting` event fires. However, the `syncIncomesForPayment` method uses query builder which bypasses this. This is correct but inconsistent with documentation. **Status:** Not a bug, but needs documentation clarification. --- ## 3. IMPLEMENTED FIXES ### Fix #1: FinanceAutoLogger - System-Controlled Updates Modified `updateCreditExpense()` and `deleteCreditExpense()` to use query builder for system operations. ### Fix #2: Expense Model - Allow System Updates Flag Added a static flag to allow bypassing protection for system-controlled operations. ### Fix #3: Documentation Clarification Clear separation between: - **Manual operations** (blocked by model events) - **System operations** (bypass via query builder or flag) --- ## 4. FINANCIAL INTEGRITY RULES ### INCOME RULES | Rule | Enforcement | Location | |------|-------------|----------| | Payment-linked income requires `payment_id` | Model creating event | `Income.php:54-56` | | Payment-linked income requires `credit_id` | Model creating event | `Income.php:54-56` | | Operational income cannot have `payment_id` | Model creating event | `Income.php:54-56` | | Manual delete blocked for payment-linked | Model deleting event | `Income.php:27-33` | | Manual edit of critical fields blocked | Model updating event | `Income.php:35-49` | | System delete allowed | Query builder bypass | `PaymentReverser.php:142-146` | ### EXPENSE RULES | Rule | Enforcement | Location | |------|-------------|----------| | Disbursement requires `credit_id` | Model creating event | `Expense.php:30-36` | | Disbursement must affect cash | Model creating event | `Expense.php:38-42` | | Manual edit blocked for disbursement | Model updating event | `Expense.php:67-73` | | Manual delete blocked for financial types | Model deleting event | `Expense.php:75-84` | | System updates allowed | Query builder bypass | `FinanceAutoLogger.php` | ### PAYMENT RULES | Rule | Enforcement | Location | |------|-------------|----------| | Voided payments cannot be edited | Service validation | `PaymentManager.php:116-118` | | Voided payments cannot be re-voided | Service validation | `PaymentReverser.php:27-29` | | Paid credits block payment deletion | Service validation | `PaymentManager.php:277-282` | | Previously reversed payments blocked | Service validation | `PaymentManager.php:285-292` | ### CREDIT RULES | Rule | Enforcement | Location | |------|-------------|----------| | Credits with capital payments cannot be edited | Page validation | `EditCredit.php:169-178` | | Credits with capital payments cannot be extended | Action visibility | `EditCredit.php:49-52` | | Closed credits cannot be extended | Service validation | `CreditOperationService.php:140-142` | --- ## 5. EDITABILITY MATRIX ### What CAN be edited: | Entity | Field | Condition | |--------|-------|-----------| | Payment | `amount` | Not voided | | Payment | `payment_method` | Not voided | | Payment | `payment_date` | Not voided | | Credit | All fields | No capital payments | | Income | Non-critical fields | Not payment-linked | | Expense | All fields | Type = `operational` | ### What CANNOT be edited: | Entity | Field | Reason | |--------|-------|--------| | Payment | Any | If voided | | Credit | Any | If has capital payments | | Income | `amount`, `category`, `credit_id`, `payment_id` | If payment-linked | | Expense | Any | If type = `disbursement` (manual) | | Expense | Any | If type = `financial_adjustment` (delete) | ### What is SYSTEM-CONTROLLED ONLY: | Entity | Operation | Trigger | |--------|-----------|---------| | Income | Create | Payment registration | | Income | Update | Payment edit | | Income | Delete | Payment reversal | | Expense | Create | Credit creation | | Expense | Update | Credit edit (system) | | Expense | Delete | Credit cancellation (system) | --- ## 6. CASH CONSISTENCY VALIDATION The system maintains cash consistency through: 1. **Automatic Income Creation:** Every payment creates corresponding Income entries 2. **Automatic Income Sync:** Payment edits re-sync Income entries 3. **Automatic Income Deletion:** Payment reversals delete Income entries 4. **Expense Creation:** Credit disbursements create Expense entries 5. **Financial Operations:** Track all structural credit operations **Cash Balance Query:** ```sql SELECT (SELECT COALESCE(SUM(amount), 0) FROM incomes WHERE company_id = ?) - (SELECT COALESCE(SUM(amount), 0) FROM expenses WHERE company_id = ? AND affects_cash = 1) AS cash_balance; ``` --- ## 7. AUDIT TRAIL COMPLETENESS | Operation | Audit Log | Snapshot | |-----------|-----------|----------| | Payment Create | `PaymentAuditLog` | Before/After with installments | | Payment Edit | `PaymentAuditLog` | Before/After with installments | | Payment Reverse | `PaymentAuditLog` | Before/After with reversal details | | Credit Create | `CreditAuditLog` | Input data | | Credit Edit | `CreditAuditLog` | Old/New values | | Credit Extend | `CreditAuditLog` + `FinancialOperation` | New credit ID | | Credit Cancel | `CreditAuditLog` | Reason | --- ## 8. RECOMMENDATIONS 1. **Add Cash Balance Widget:** Create a dashboard widget that displays real-time cash balance 2. **Add Integrity Check Command:** Create an artisan command to validate financial integrity 3. **Add Reconciliation Report:** Generate periodic reports comparing expected vs actual balances 4. **Consider Soft Deletes:** For Income/Expense records instead of hard deletes for better audit trails --- **End of Audit Report**