add balance payment

app/Services/OrderService.php

@@ -3,6 +3,7 @@
 namespace App\Services;
 
 use App\Models\Order;
+use Illuminate\Support\Facades\DB;
 
 class OrderService
 {
@@ -13,8 +14,20 @@ class OrderService
         $this->order = $order;
     }
 
-    public function cancel()
+    public function cancel():void
     {
-
+        $order = $this->order;
+        DB::beginTransaction();
+        $order->status = 2;
+        if (!$order->save()) {
+            DB::rollBack();
+        }
+        if ($order->balance_amount) {
+            $userService = new UserService();
+            if (!$userService->addBalance($order->user_id, $order->balance_amount)) {
+                DB::rollBack();
+            }
+        }
+        DB::commit();
     }
 }

app/Services/UserService.php

@@ -47,4 +47,20 @@ class UserService
     {
         return User::all();
     }
+
+    public function addBalance(int $userId, int $balance):bool
+    {
+        $user = User::find($userId);
+        if (!$user) {
+            return false;
+        }
+        $user->balance = $user->balance + $balance;
+        if ($user->balance < 0) {
+            return false;
+        }
+        if (!$user->save()) {
+            return false;
+        }
+        return true;
+    }
 }