# Analisis de Modulos Billing - BF-03

**Fecha:** 2026-01-10
**Fase:** 1.2 - Analisis de Modulos Billing
**Estado:** COMPLETADO

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## Resumen Ejecutivo

| Modulo | Estado | Completitud |
|--------|--------|-------------|
| SAAS-004 Billing | Completado con discrepancias | 95% |
| SAAS-005 Plans | Completado | 100% |

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## Discrepancias Principales

### Rutas Inconsistentes

| Documentado | Implementado | Accion |
|-------------|--------------|--------|
| `POST /billing/checkout` | `POST /stripe/checkout-session` | Actualizar doc |
| `POST /billing/portal` | `POST /stripe/billing-portal` | Actualizar doc |
| `GET /billing/plans` | `GET /plans` | Actualizar doc |
| `PUT /billing/change-plan` | `POST /billing/subscription/change-plan/:planId` | Actualizar doc |

### Campos Faltantes en Entidades TypeORM

**Subscription:**
- stripe_subscription_id (usar external_subscription_id)
- trial_start
- cancel_at
- price_amount
- currency

**Invoice:**
- amount_paid
- amount_due
- customer_name
- customer_email

### Endpoint Faltante

- `GET /billing/invoices/:id/pdf` - Documentado pero no implementado

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## Webhooks Stripe

| Evento | Estado |
|--------|--------|
| customer.subscription.created | Implementado |
| customer.subscription.updated | Implementado |
| customer.subscription.deleted | Implementado |
| invoice.paid | Implementado |
| invoice.payment_failed | Implementado |
| payment_method.attached | Implementado (extra) |
| payment_method.detached | Implementado (extra) |
| checkout.session.completed | Implementado (extra) |

**Total:** 8 webhooks implementados (mas de los 6 documentados)

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## Estado de Integracion Stripe

- Checkout funciona
- Webhooks se procesan
- Upgrade/downgrade funciona
- Facturas se generan
- Trial funciona
- Cancelacion funciona

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## Recomendaciones

1. **CRITICA:** Crear entidades TypeORM para invoice_items y payments
2. **CRITICA:** Completar campos en Subscription e Invoice
3. **ALTA:** Actualizar documentacion con rutas reales
4. **ALTA:** Agregar endpoint GET /billing/invoices/:id/pdf

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**Entregable de:** FASE 1.2