# Phase 9 Backend Contract — Tenant Registry, Domain Automation, Publish Model

Companion to [PRODUCT-PLAN-v3.1-DELIVERY-PLAN.md](../PRODUCT-PLAN-v3.1-DELIVERY-PLAN.md) Phase 9 (Sprints 9.1–9.3). Covers plan §4.3, §8.

**Status: ready to build.** Zero `hostinger` references exist in the codebase today.

---

## 1. Entities

```ts
interface Marketplace {
  id: string;
  name: string;
  code: string;
  type: 'commerce' | 'mall_directory' | 'hybrid' | 'single_brand';
  ownerId: string;
  countries: string[];
  locales: string[];
  currencies: string[];
  timezone: string;
  lifecycleState: MarketplaceLifecycleState;
}

type MarketplaceLifecycleState =
  | 'draft' | 'configured' | 'content_ready' | 'domains_planned'
  | 'staging_live' | 'qa_passed' | 'production_ready' | 'live' | 'paused' | 'archived';

interface MarketplaceDomain {
  marketplaceId: string;
  domain: string;
  type: 'production' | 'www' | 'staging' | 'preview' | 'api' | 'seller';
  status: 'planned' | 'dns_pending' | 'ssl_pending' | 'active' | 'failed';
}

interface MarketplaceFeatureSet {
  marketplaceId: string;
  features: Record<string, boolean>; // e.g. { catalog: true, sellers: true, cart: true, checkout: true, payments: true, orders: true, refunds: true, directory: false, ... }
}

interface MarketplaceRevision {
  id: string;
  marketplaceId: string;
  status: 'draft' | 'validated' | 'preview' | 'published';
  publishedAt?: string;
  supersedesRevisionId?: string; // rollback creates a NEW revision, never mutates the old one
}
```

**Hard invariant:** `Order`, `Payment`, `InventoryRecord`, and every financial ledger row are **not part of a `MarketplaceRevision`**. Rolling back a storefront design revision must never touch commerce data.

## 2. Lifecycle state machine

```
draft -> configured -> content_ready -> domains_planned -> staging_live -> qa_passed -> production_ready -> live -> paused/archived
```

Every state transition endpoint must return the specific blocker preventing the next transition — not just "not ready."

```
GET  /api/admin/v2/marketplaces/{id}/lifecycle    -> { currentState, nextState, blockers: string[] }
POST /api/admin/v2/marketplaces/{id}/lifecycle/advance
```

## 3. Onboarding wizard (8 steps, plan §4.3)

```
POST /api/admin/v2/marketplaces                          -- step 1: name/code/type/owner/countries/locales/currencies/timezone
PATCH /api/admin/v2/marketplaces/{id}/feature-set         -- step 2
POST /api/admin/v2/marketplaces/{id}/domains              -- step 3
PATCH /api/admin/v2/marketplaces/{id}/design              -- step 4
POST /api/admin/v2/marketplaces/{id}/roles                -- step 5
PATCH /api/admin/v2/marketplaces/{id}/integrations        -- step 6
POST /api/admin/v2/marketplaces/{id}/staging-launch       -- step 7, runs smoke tests
POST /api/admin/v2/marketplaces/{id}/production-launch    -- step 8, requires all P0 blockers closed + explicit approval
```

## 4. Domain automation (Hostinger API, per plan §8.2)

```
GET    /api/dns/v1/zones/{domain}
POST   /api/dns/v1/zones/{domain}/validate
PUT    /api/dns/v1/zones/{domain}
DELETE /api/dns/v1/zones/{domain}
GET    /api/dns/v1/snapshots/{domain}
GET    /api/dns/v1/snapshots/{domain}/{snapshotId}
POST   /api/dns/v1/snapshots/{domain}/{snapshotId}/restore
```

Process, strictly in this order:
```
1. Read current DNS zone.
2. Save a snapshot (rollback payload) BEFORE any change.
3. Build and validate a DNS plan.
4. NEVER touch MX/SPF/DKIM/DMARC/CAA records without a separate, explicitly scoped task.
5. Apply records only after production approval.
6. Verify propagation, SSL issuance, and health checks.
7. Mark the domain 'active' only after all checks in step 6 pass.
```

## 5. Publish model

```
draft -> validation -> preview -> publish
```

```
POST /api/admin/v2/marketplaces/{id}/revisions               -- create draft
POST /api/admin/v2/marketplaces/{id}/revisions/{revId}/validate
POST /api/admin/v2/marketplaces/{id}/revisions/{revId}/publish  -- becomes immutable
POST /api/admin/v2/marketplaces/{id}/revisions/{revId}/rollback -- creates a NEW revision pointing at the prior published content
```

Replaces the current builder's `localStorage`-only draft persistence and the empty `apiEndpoints.builder: {}` placeholder in bootstrap. CMS/static-page content (currently in-memory bootstrap only) gets a real write path through this same revision model.

## 6. Tenant resolution hardening

```
GET /api/v2/storefront/bootstrap    -- resolved server-side from verified Host header
```

- Host is normalized and matched against `MarketplaceDomain` server-side — the marketplace ID from the browser is never a trust boundary.
- Unknown Host → `404`, with **no fallback to any other tenant**.

## 7. What the frontend will start doing once this ships

- Build the backoffice **Marketplaces** section (missing from admin nav today): registry, type, status, domains, currencies, feature set, responsible manager.
- Build the **Domains & Releases** section: DNS/SSL status, staging/production, health checks, rollback.
- Wire the project editor/builder to real revision persistence instead of `localStorage`.
- Marketplace dashboard: GMV, paid orders, conversion, payment failure rate, moderation queue, low stock, unmatched events, integration health, domain/SSL/release status (plan §4.2).