feat: add tier_id FK to VendorSubscription for proper tier relationship
- Add tier_id column with FK to subscription_tiers table - Add tier_obj relationship to VendorSubscription model - Update tier_limits property to use database tier when available - Create migration with SQLite batch mode support - Backfill tier_id from existing tier code values This enables proper database relationship between vendors and their subscription tier, instead of just storing the tier code string. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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docs/implementation/subscription-workflow-plan.md
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docs/implementation/subscription-workflow-plan.md
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# Subscription Workflow Plan
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## Overview
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End-to-end subscription management workflow for vendors on the platform.
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---
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## 1. Vendor Subscribes to a Tier
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### 1.1 New Vendor Registration Flow
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```
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Vendor Registration → Select Tier → Trial Period → Payment Setup → Active Subscription
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```
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**Steps:**
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1. Vendor creates account (existing flow)
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2. During onboarding, vendor selects a tier:
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- Show tier comparison cards (Essential, Professional, Business, Enterprise)
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- Highlight features and limits for each tier
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- Default to 14-day trial on selected tier
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3. Create `VendorSubscription` record with:
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- `tier` = selected tier code
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- `status` = "trial"
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- `trial_ends_at` = now + 14 days
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- `period_start` / `period_end` set for trial period
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4. Before trial ends, prompt vendor to add payment method
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5. On payment method added → Create Stripe subscription → Status becomes "active"
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### 1.2 Database Changes Required
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**Add FK relationship to `subscription_tiers`:**
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```python
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# VendorSubscription - Add proper FK
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tier_id = Column(Integer, ForeignKey("subscription_tiers.id"), nullable=True)
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tier_code = Column(String(20), nullable=False) # Keep for backwards compat
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# Relationship
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tier_obj = relationship("SubscriptionTier", backref="subscriptions")
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```
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**Migration:**
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1. Add `tier_id` column (nullable initially)
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2. Populate `tier_id` from existing `tier` code values
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3. Add FK constraint
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### 1.3 API Endpoints
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| Endpoint | Method | Description |
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|----------|--------|-------------|
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| `/api/v1/vendor/subscription/tiers` | GET | List available tiers for selection |
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| `/api/v1/vendor/subscription/select-tier` | POST | Select tier during onboarding |
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| `/api/v1/vendor/subscription/setup-payment` | POST | Create Stripe checkout for payment |
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---
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## 2. Admin Views Subscription on Vendor Page
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### 2.1 Vendor Detail Page Enhancement
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**Location:** `/admin/vendors/{vendor_id}`
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**New Subscription Card:**
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```
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┌─────────────────────────────────────────────────────────────┐
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│ Subscription [Edit] │
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├─────────────────────────────────────────────────────────────┤
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│ Tier: Professional Status: Active │
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│ Price: €99/month Since: Jan 15, 2025 │
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│ Next Billing: Feb 15, 2025 │
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├─────────────────────────────────────────────────────────────┤
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│ Usage This Period │
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│ ┌──────────────┐ ┌──────────────┐ ┌──────────────┐ │
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│ │ Orders │ │ Products │ │ Team Members │ │
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│ │ 234 / 500 │ │ 156 / ∞ │ │ 2 / 3 │ │
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│ │ ████████░░ │ │ ████████████ │ │ ██████░░░░ │ │
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│ └──────────────┘ └──────────────┘ └──────────────┘ │
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├─────────────────────────────────────────────────────────────┤
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│ Add-ons: Custom Domain (mydomain.com), 5 Email Addresses │
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└─────────────────────────────────────────────────────────────┘
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```
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### 2.2 Files to Modify
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- `app/templates/admin/vendor-detail.html` - Add subscription card
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- `static/admin/js/vendor-detail.js` - Load subscription data
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- `app/api/v1/admin/vendors.py` - Include subscription in vendor response
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### 2.3 Admin Quick Actions
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From the vendor page, admin can:
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- **Change Tier** - Upgrade/downgrade vendor
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- **Override Limits** - Set custom limits (enterprise deals)
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- **Extend Trial** - Give more trial days
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- **Cancel Subscription** - With reason
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- **Manage Add-ons** - Add/remove add-ons
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---
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## 3. Tier Upgrade/Downgrade
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### 3.1 Admin-Initiated Change
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**Location:** Admin vendor page → Subscription card → [Edit] button
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**Modal: Change Subscription Tier**
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```
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┌─────────────────────────────────────────────────────────┐
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│ Change Subscription Tier [X] │
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├─────────────────────────────────────────────────────────┤
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│ Current: Professional (€99/month) │
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│ │
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│ New Tier: │
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│ ○ Essential (€49/month) - Downgrade │
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│ ● Business (€199/month) - Upgrade │
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│ ○ Enterprise (Custom) - Contact required │
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│ │
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│ When to apply: │
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│ ○ Immediately (prorate current period) │
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│ ● At next billing cycle (Feb 15, 2025) │
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│ │
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│ [ ] Notify vendor by email │
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│ │
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│ [Cancel] [Apply Change] │
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└─────────────────────────────────────────────────────────┘
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```
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### 3.2 Vendor-Initiated Change
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**Location:** Vendor dashboard → Billing page → [Change Plan]
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**Flow:**
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1. Vendor clicks "Change Plan" on billing page
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2. Shows tier comparison with current tier highlighted
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3. Vendor selects new tier
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4. For upgrades:
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- Show prorated amount for immediate change
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- Or option to change at next billing
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- Redirect to Stripe checkout if needed
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5. For downgrades:
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- Always schedule for next billing cycle
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- Show what features they'll lose
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- Confirmation required
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### 3.3 API Endpoints
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| Endpoint | Method | Actor | Description |
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|----------|--------|-------|-------------|
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| `/api/v1/admin/subscriptions/{vendor_id}/change-tier` | POST | Admin | Change vendor's tier |
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| `/api/v1/vendor/billing/change-tier` | POST | Vendor | Request tier change |
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| `/api/v1/vendor/billing/preview-change` | POST | Vendor | Preview proration |
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### 3.4 Stripe Integration
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**Upgrade (Immediate):**
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```python
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stripe.Subscription.modify(
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subscription_id,
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items=[{"price": new_price_id}],
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proration_behavior="create_prorations"
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)
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```
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**Downgrade (Scheduled):**
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```python
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stripe.Subscription.modify(
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subscription_id,
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items=[{"price": new_price_id}],
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proration_behavior="none",
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billing_cycle_anchor="unchanged"
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)
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# Store scheduled change in our DB
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```
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---
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## 4. Add-ons Upselling
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### 4.1 Where Add-ons Are Displayed
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#### A. Vendor Billing Page
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```
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/vendor/{code}/billing
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┌─────────────────────────────────────────────────────────────┐
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│ Available Add-ons │
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├─────────────────────────────────────────────────────────────┤
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│ ┌─────────────────────┐ ┌─────────────────────┐ │
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│ │ 🌐 Custom Domain │ │ 📧 Email Package │ │
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│ │ €15/year │ │ From €5/month │ │
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│ │ Use your own domain │ │ 5, 10, or 25 emails │ │
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│ │ [Add to Plan] │ │ [Add to Plan] │ │
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│ └─────────────────────┘ └─────────────────────┘ │
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│ │
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│ ┌─────────────────────┐ ┌─────────────────────┐ │
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│ │ 🔒 Premium SSL │ │ 💾 Extra Storage │ │
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│ │ €49/year │ │ €5/month per 10GB │ │
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│ │ EV certificate │ │ More product images │ │
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│ │ [Add to Plan] │ │ [Add to Plan] │ │
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│ └─────────────────────┘ └─────────────────────┘ │
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└─────────────────────────────────────────────────────────────┘
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```
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#### B. Contextual Upsells
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**When vendor hits a limit:**
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```
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┌─────────────────────────────────────────────────────────┐
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│ ⚠️ You've reached your order limit for this month │
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│ │
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│ Upgrade to Professional to get 500 orders/month │
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│ [Upgrade Now] [Dismiss] │
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└─────────────────────────────────────────────────────────┘
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```
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**In settings when configuring domain:**
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```
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┌─────────────────────────────────────────────────────────┐
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│ 🌐 Custom Domain │
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│ │
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│ Your shop is available at: myshop.platform.com │
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│ │
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│ Want to use your own domain like www.myshop.com? │
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│ Add the Custom Domain add-on for just €15/year │
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│ │
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│ [Add Custom Domain] │
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└─────────────────────────────────────────────────────────┘
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```
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#### C. Upgrade Prompts in Tier Comparison
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When showing tier comparison, highlight what add-ons come included:
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- Professional: Includes 1 custom domain
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- Business: Includes custom domain + 5 email addresses
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- Enterprise: All add-ons included
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### 4.2 Add-on Purchase Flow
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```
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Vendor clicks [Add to Plan]
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↓
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Modal: Configure Add-on
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- Domain: Enter domain name, check availability
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- Email: Select package (5/10/25)
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↓
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Create Stripe checkout session for add-on price
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↓
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On success: Create VendorAddOn record
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↓
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Provision add-on (domain registration, email setup)
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```
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### 4.3 Add-on Management
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**Vendor can view/manage in Billing page:**
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```
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┌─────────────────────────────────────────────────────────────┐
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│ Your Add-ons │
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├─────────────────────────────────────────────────────────────┤
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│ Custom Domain myshop.com €15/year [Manage] │
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│ Email Package 5 addresses €5/month [Manage] │
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│ │
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│ Next billing: Feb 15, 2025 │
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└─────────────────────────────────────────────────────────────┘
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```
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### 4.4 Database: `vendor_addons` Table
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```python
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class VendorAddOn(Base):
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id = Column(Integer, primary_key=True)
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vendor_id = Column(Integer, ForeignKey("vendors.id"))
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addon_product_id = Column(Integer, ForeignKey("addon_products.id"))
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# Config (e.g., domain name, email count)
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config = Column(JSON, nullable=True)
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# Stripe
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stripe_subscription_item_id = Column(String(100))
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# Status
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status = Column(String(20)) # active, cancelled, pending_setup
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provisioned_at = Column(DateTime)
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# Billing
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quantity = Column(Integer, default=1)
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created_at = Column(DateTime)
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cancelled_at = Column(DateTime, nullable=True)
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```
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---
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## 5. Implementation Phases
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### Phase 1: Database & Core (Day 1-2)
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- [ ] Add `tier_id` FK to VendorSubscription
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- [ ] Create migration with data backfill
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- [ ] Update subscription service to use tier relationship
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- [ ] Update admin subscription endpoints
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### Phase 2: Admin Vendor Page (Day 2-3)
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- [ ] Add subscription card to vendor detail page
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- [ ] Show usage meters (orders, products, team)
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- [ ] Add "Edit Subscription" modal
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- [ ] Implement tier change API (admin)
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### Phase 3: Vendor Billing Page (Day 3-4)
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- [ ] Create `/vendor/{code}/billing` page
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- [ ] Show current plan and usage
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- [ ] Add tier comparison/change UI
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- [ ] Implement tier change API (vendor)
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- [ ] Add Stripe checkout integration for upgrades
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### Phase 4: Add-ons (Day 4-5)
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- [ ] Seed add-on products in database
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- [ ] Add "Available Add-ons" section to billing page
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- [ ] Implement add-on purchase flow
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- [ ] Create VendorAddOn management
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- [ ] Add contextual upsell prompts
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### Phase 5: Polish & Testing (Day 5-6)
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- [ ] Email notifications for tier changes
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- [ ] Webhook handling for Stripe events
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- [ ] Usage limit enforcement updates
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- [ ] End-to-end testing
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- [ ] Documentation
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---
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## 6. Files to Create/Modify
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### New Files
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| File | Purpose |
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|------|---------|
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| `app/templates/vendor/billing.html` | Vendor billing page |
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| `static/vendor/js/billing.js` | Billing page JS |
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| `app/api/v1/vendor/billing.py` | Vendor billing endpoints |
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| `app/services/addon_service.py` | Add-on management |
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### Modified Files
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| File | Changes |
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|------|---------|
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| `models/database/subscription.py` | Add tier_id FK |
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| `app/templates/admin/vendor-detail.html` | Add subscription card |
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| `static/admin/js/vendor-detail.js` | Load subscription data |
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| `app/api/v1/admin/vendors.py` | Include subscription in response |
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| `app/api/v1/admin/subscriptions.py` | Add tier change endpoint |
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| `app/services/subscription_service.py` | Tier change logic |
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| `app/templates/vendor/partials/sidebar.html` | Add Billing link |
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---
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## 7. API Summary
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### Admin APIs
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```
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GET /admin/vendors/{id} # Includes subscription
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POST /admin/subscriptions/{vendor_id}/change-tier
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POST /admin/subscriptions/{vendor_id}/override-limits
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POST /admin/subscriptions/{vendor_id}/extend-trial
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POST /admin/subscriptions/{vendor_id}/cancel
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```
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### Vendor APIs
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```
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GET /vendor/billing/subscription # Current subscription
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GET /vendor/billing/tiers # Available tiers
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POST /vendor/billing/preview-change # Preview tier change
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POST /vendor/billing/change-tier # Request tier change
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POST /vendor/billing/checkout # Stripe checkout session
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GET /vendor/billing/addons # Available add-ons
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GET /vendor/billing/my-addons # Vendor's add-ons
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POST /vendor/billing/addons/purchase # Purchase add-on
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DELETE /vendor/billing/addons/{id} # Cancel add-on
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```
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---
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## 8. Questions to Resolve
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1. **Trial without payment method?**
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- Allow full trial without card, or require card upfront?
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2. **Downgrade handling:**
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- What happens if vendor has more products than new tier allows?
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- Block downgrade, or just prevent new products?
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3. **Enterprise tier:**
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- Self-service or contact sales only?
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- Custom pricing in UI or hidden?
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4. **Add-on provisioning:**
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- Domain: Use reseller API or manual process?
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- Email: Integrate with email provider or manual?
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5. **Grace period:**
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- How long after payment failure before suspension?
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- What gets disabled first?
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