diff --git a/.gitignore b/.gitignore
index c867e8f..9091e68 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,4 +10,5 @@ vendor/
 .env
 .DS_Store
 *.lock
-.phpunit*
\ No newline at end of file
+.phpunit*
+/watch
diff --git a/app/Controller/CouponController.php b/app/Controller/CouponController.php
index bf1bd41..069c9a2 100644
--- a/app/Controller/CouponController.php
+++ b/app/Controller/CouponController.php
@@ -98,35 +98,36 @@ class CouponController extends BaseController
         $userId      = $this->request->input("user_id");
         $receiveType = $this->request->input("receive_type");
         $ids         = $this->request->input("ids");
-        $test        = $this->request->input("test", 0);
-
         $ids     = explode(',', $ids);
-        $cps     = Coupon::whereIn('id', $ids)->get();
         $now     = time();
         $success = [];
         $fail    = [];
-        foreach ($cps as $key => $cp) {
-            $crt = CouponUserRecType::where(
-                [
-                    'system_coupon_user_id' => $cp->id,
-                    'receive_type'          => $receiveType
-                ]
-            )->first();
-
-            $cr                        = new CouponRec;
-            $cr->user_id               = $userId;
-            $cr->system_coupon_user_id = $cp->id;
-            $cr->order_main_id         = 0;
-            $cr->receive_time          = $now;
-            $cr->number                = $crt->one_receive_number;
-            $cr->number_remain         = $crt->one_receive_number;
-            $cr->status                = 0;
-            $cr->update_time           = $now;
-            $cr->receive_type          = $receiveType;
-            if ($test && ($cp->id % 2)) {
-                $fail[] = $cp;
-            } else {
-                //TODO 会有超发情况
+
+
+        Db::transaction(function () use ($ids,$receiveType,$userId,&$success,&$fail,$now) {
+            //读写锁，完全控制，性能底
+            $cps     = Coupon::whereIn('id', $ids)->lockForUpdate()->get();
+            //写锁，可能在高并发下，读取到脏数据，写入可能有超发情况
+            //$cps     = Coupon::whereIn('id', $ids)->sharedLock()->get();
+
+            foreach ($cps as $key => $cp) {
+                $crt = CouponUserRecType::where(
+                    [
+                        'system_coupon_user_id' => $cp->id,
+                        'receive_type'          => $receiveType
+                    ]
+                )->first();
+
+                $cr                        = new CouponRec;
+                $cr->user_id               = $userId;
+                $cr->system_coupon_user_id = $cp->id;
+                $cr->order_main_id         = 0;
+                $cr->receive_time          = $now;
+                $cr->number                = $crt->one_receive_number;
+                $cr->number_remain         = $crt->one_receive_number;
+                $cr->status                = 0;
+                $cr->update_time           = $now;
+                $cr->receive_type          = $receiveType;
                 //如果优惠卷库存小于等于已领取的数量, 则返回领取失败的优惠券
                 if ($cp->inventory<=$cp->inventory_use||$cp->inventory<($cp->inventory_use+$cr->number)){
                     $fail[] = $cp;
@@ -139,8 +140,7 @@ class CouponController extends BaseController
                     }
                 }
             }
-
-        }
+        });
 
         return $this->success([
             'success' => $success,
diff --git a/app/Controller/IndexController.php b/app/Controller/IndexController.php
index 60c3235..3864423 100644
--- a/app/Controller/IndexController.php
+++ b/app/Controller/IndexController.php
@@ -20,7 +20,7 @@ class IndexController extends AbstractController
 
         return [
             'method' => $method,
-            'message' => "Hello {$user}.",
+            'message' => "Hello22222 {$user}.",
         ];
     }
 }