final

app/api/payments/create-invoice/route.ts

@@ -192,23 +192,35 @@ export async function POST(request: NextRequest) {
         )
       }
 
-      // Get points_to_chf setting
+      // Get points_to_eur setting (fallback to points_to_chf for backward compatibility)
       const [settingsRows] = await connection.execute(
-        'SELECT setting_value FROM referral_settings WHERE setting_key = ?',
-        ['points_to_chf']
+        'SELECT setting_key, setting_value FROM referral_settings WHERE setting_key IN (?, ?)',
+        ['points_to_eur', 'points_to_chf']
       )
       const settings = settingsRows as any[]
-      const pointsToChf = parseFloat(settings[0]?.setting_value || '100')
-
-      // Calculate discount in CHF, then convert to user's currency
-      const discountChf = pointsToUse / pointsToChf
+      let pointsToEur = parseFloat(settings.find(s => s.setting_key === 'points_to_eur')?.setting_value || '0')
       
-      // Convert discount based on user's currency
+      // If points_to_eur not found, use points_to_chf and convert
+      if (pointsToEur === 0) {
+        const pointsToChf = parseFloat(settings.find(s => s.setting_key === 'points_to_chf')?.setting_value || '100')
+        // Convert CHF-based points to EUR-based (1 CHF ≈ 1.0309 EUR)
+        pointsToEur = pointsToChf / 1.030927835
+      }
+      
+      if (pointsToEur === 0) {
+        pointsToEur = 100 // Default fallback
+      }
+
+      // Calculate discount in EUR first (universal base currency)
+      const discountEur = pointsToUse / pointsToEur
+      
+      // Convert discount to user's currency
       if (currency === 'CHF') {
-        pointsDiscount = discountChf
+        // Convert EUR to CHF (1 EUR = 0.97 CHF)
+        pointsDiscount = discountEur * 0.97
       } else {
-        // Convert CHF to EUR (1 CHF ≈ 1.03 EUR)
-        pointsDiscount = discountChf * 1.03
+        // Already in EUR
+        pointsDiscount = discountEur
       }
 
       // Don't allow discount to exceed the product price (before shipping)