# Flutterwave Webhook Implementation - Files Created

## Summary
You mentioned **"any no webhook?"** - you were right! The integration only had redirect verification. I've now added a complete webhook handler for more reliable payment processing.

---

## 📁 Files Created

### 1. **`user/flutterwave-webhook.php`** ⭐ Main Webhook Handler
**Purpose:** Receives payment notifications from Flutterwave servers

**Features:**
- ✅ Signature verification (security)
- ✅ Double-check with Flutterwave API
- ✅ Wallet crediting in NGN
- ✅ Referral commission processing
- ✅ Duplicate payment prevention
- ✅ Detailed logging
- ✅ Error handling

**URL to configure in Flutterwave:**
```
https://yourdomain.com/user/flutterwave-webhook.php
```

---

### 2. **`flutterwave_setup.sql`** (Updated)
**Purpose:** Database setup with webhook support

**Added:**
- `flutterwave_webhook_secret` column
- Verification queries
- Performance indexes
- Monitoring queries

**Run this:**
```bash
mysql -u root -p your_database < flutterwave_setup.sql
```

---

### 3. **`FLUTTERWAVE_WEBHOOK_SETUP.md`** 📖 Complete Setup Guide
**Purpose:** Step-by-step webhook configuration instructions

**Includes:**
- Dashboard configuration
- Database setup
- Testing procedures
- Troubleshooting guide
- Security checklist
- Example payloads

---

### 4. **`user/test-flutterwave-webhook.php`** 🧪 Test Tool
**Purpose:** Test webhook locally before going live

**Features:**
- Visual test interface
- Auto-generates test payloads
- Shows request/response
- Admin-only access
- **DELETE AFTER TESTING**

**Access:**
```
https://yourdomain.com/user/test-flutterwave-webhook.php
```

---

### 5. **`user/.htaccess_webhook`** 🔒 Security Reference
**Purpose:** Apache configuration for webhook endpoint

**Protects:**
- Webhook endpoint accessibility
- Log file privacy
- Optional IP whitelisting

**Note:** Merge rules into existing `.htaccess`

---

### 6. **`FLUTTERWAVE_INTEGRATION.md`** (Already created)
**Purpose:** Complete integration documentation

**Covers:**
- Current implementation
- Configuration steps
- Transaction flow
- API endpoints
- Troubleshooting

---

## 🚀 Quick Setup (5 Steps)

### Step 1: Run SQL Setup
```bash
mysql -u root -p your_database < flutterwave_setup.sql
```

### Step 2: Configure Webhook in Flutterwave Dashboard
1. Login to https://dashboard.flutterwave.com
2. Go to **Settings → Webhooks**
3. Add URL: `https://yourdomain.com/user/flutterwave-webhook.php`
4. Copy the **Secret Hash**
5. Select event: `charge.completed`
6. Save

### Step 3: Add Secret to Database
```sql
UPDATE settings 
SET flutterwave_webhook_secret = 'YOUR_SECRET_HASH_FROM_DASHBOARD'
WHERE id = 1;
```

### Step 4: Test Webhook
Visit: `https://yourdomain.com/user/test-flutterwave-webhook.php`
- Enter a real transaction reference from your DB
- Click "Send Test Webhook"
- Check logs: `user/logs/flutterwave_webhook.log`

### Step 5: Go Live
1. Make a small test deposit
2. Monitor webhook logs
3. Verify wallet is credited
4. **Delete `test-flutterwave-webhook.php`**

---

## 📊 How It Works Now

### Before (Redirect Only):
```
User pays → Flutterwave redirects → verify-payment.php → credit wallet
```
**Problem:** If user closes browser, payment may not be credited

### After (With Webhook):
```
User pays → Flutterwave notifies webhook → auto-credit wallet
           ↓
      Also redirects → verify-payment.php → already processed ✓
```
**Benefit:** Payment credited even if user doesn't complete redirect

---

## 🔍 Verification

### Check Webhook is Active:
```bash
tail -f user/logs/flutterwave_webhook.log
```

### Check Recent Webhook Transactions:
```sql
SELECT 
    transaction_ref,
    status,
    amount,
    payment_method,
    gateway_reference,
    updated_at
FROM transactions
WHERE payment_gateway = 'flutterwave'
AND gateway_response LIKE '%webhook%'
ORDER BY updated_at DESC
LIMIT 10;
```

---

## 🛡️ Security Features

✅ **Signature Verification** - Validates webhook is from Flutterwave  
✅ **API Re-verification** - Double-checks payment status  
✅ **Transaction Locking** - Prevents duplicate crediting  
✅ **Detailed Logging** - Tracks all webhook activity  
✅ **Error Handling** - Graceful failure with logging  

---

## 📝 Maintenance

### View Webhook Logs:
```bash
cat user/logs/flutterwave_webhook.log
```

### Monitor Success Rate:
```bash
grep "Transaction processed successfully" user/logs/flutterwave_webhook.log | wc -l
```

### Check for Errors:
```bash
grep "ERROR:" user/logs/flutterwave_webhook.log
```

---

## ⚠️ Important Notes

1. **Webhook + Redirect both work** - They complement each other
2. **Duplicate prevention** - Transaction locking prevents double-crediting
3. **Test before production** - Use test keys first
4. **Monitor logs** - Check webhook activity regularly
5. **Delete test script** - Remove `test-flutterwave-webhook.php` after testing

---

## 🆘 Support

**Webhook Issues:**
- Check `FLUTTERWAVE_WEBHOOK_SETUP.md` troubleshooting section
- Review webhook logs: `user/logs/flutterwave_webhook.log`

**Flutterwave Support:**
- Docs: https://developer.flutterwave.com/docs/integration-guides/webhooks
- Email: developers@flutterwavego.com

**Platform Support:**
- WhatsApp: +2349162671360
- Telegram: @jeditech

---

## ✅ Implementation Checklist

- [ ] Run `flutterwave_setup.sql`
- [ ] Configure webhook URL in Flutterwave dashboard
- [ ] Add webhook secret to database
- [ ] Test using `test-flutterwave-webhook.php`
- [ ] Make test deposit with test card
- [ ] Verify wallet credited correctly
- [ ] Check webhook logs
- [ ] Delete test script
- [ ] Monitor production webhooks for 24 hours
- [ ] Set up log rotation (optional)

---

**Status:** ✅ Webhook implementation complete and ready for testing!

**Next Step:** Follow the Quick Setup (5 Steps) above to activate webhooks.
