race condition fixed, payment inside

app/api/payments/check-status/route.ts

@@ -43,11 +43,31 @@ export async function GET(request: NextRequest) {
     const pendingOrders = pendingRows as any[]
     const sales = salesRows as any[]
 
-    if (pendingOrders.length === 0 && sales.length === 0) {
-      return NextResponse.json(
-        { error: 'Payment not found' },
-        { status: 404 }
-      )
+    // Check if pending order exists and if sale exists
+    const hasPendingOrder = pendingOrders.length > 0
+    const hasSale = sales.length > 0
+
+    // If pending order is gone and sale exists, payment was processed
+    if (!hasPendingOrder && hasSale) {
+      return NextResponse.json({
+        payment_id,
+        status: 'completed',
+        payment_status: 'completed',
+        has_pending_order: false,
+        has_sale: true,
+        sale: sales[0],
+      })
+    }
+
+    // If both are gone, payment was cancelled or expired
+    if (!hasPendingOrder && !hasSale) {
+      return NextResponse.json({
+        payment_id,
+        status: 'cancelled',
+        payment_status: 'cancelled',
+        has_pending_order: false,
+        has_sale: false,
+      })
     }
 
     // Get NOWPayments config (testnet or production)
@@ -82,6 +102,8 @@ export async function GET(request: NextRequest) {
       pay_currency: paymentStatus.pay_currency,
       price_amount: paymentStatus.price_amount,
       price_currency: paymentStatus.price_currency,
+      has_pending_order: hasPendingOrder,
+      has_sale: hasSale,
     })
   } catch (error) {
     console.error('Error checking payment status:', error)