diff --git a/app/Constants/ResponseCode.php b/app/Constants/ResponseCode.php
index 8f1e02b..317a6b4 100644
--- a/app/Constants/ResponseCode.php
+++ b/app/Constants/ResponseCode.php
@@ -2,24 +2,24 @@
 
 namespace App\Constants;
 
-use Hyperf\Constants\AbstractConstants;
-use Hyperf\Constants\Annotation\Constants;
-
 /**
- * @Constants
+ * HTTP 响应状态码枚举
+ *
+ * Class ResponseCode
+ * @package App\Constants
  */
-class ResponseCode extends AbstractConstants
+class ResponseCode
 {
     const SUCCESS = 200;   // 接口处理成功
     const FAIL = 305;   // 接口处理失败
 
     /**
-     * @Message("Server Error！")
+     * Server Error！
      */
     const SERVER_ERROR = 500;
 
     /**
-     * @Message("请求数据验证失败！")
+     * 请求数据验证失败！
      */
     const VALIDATION_ERROR = 301;
 }
diff --git a/app/Constants/SocketConstants.php b/app/Constants/SocketConstants.php
index 091a1c8..c526170 100644
--- a/app/Constants/SocketConstants.php
+++ b/app/Constants/SocketConstants.php
@@ -39,4 +39,18 @@ class SocketConstants
      * WebSocket 消息消费队列交换机名称
      */
     const CONSUMER_MESSAGE_EXCHANGE = 'im.message.fanout';
+
+    /**
+     * @return array
+     */
+    public static function getMap(): array
+    {
+        return [
+            self::EVENT_TALK => '对话消息通知',
+            self::EVENT_KEYBOARD => '键盘输入事件通知',
+            self::EVENT_ONLINE_STATUS => '用户在线状态通知',
+            self::EVENT_REVOKE_TALK => '聊天消息撤销通知',
+            self::EVENT_FRIEND_APPLY => '好友申请消息通知'
+        ];
+    }
 }
diff --git a/app/Controller/Api/V1/ArticleController.php b/app/Controller/Api/V1/ArticleController.php
index 6b4d24e..a0e54ee 100644
--- a/app/Controller/Api/V1/ArticleController.php
+++ b/app/Controller/Api/V1/ArticleController.php
@@ -1,5 +1,4 @@
 <?php
-declare(strict_types=1);
 
 namespace App\Controller\Api\V1;
 
diff --git a/app/Controller/Api/V1/GroupController.php b/app/Controller/Api/V1/GroupController.php
index 28a881b..94c4eb4 100644
--- a/app/Controller/Api/V1/GroupController.php
+++ b/app/Controller/Api/V1/GroupController.php
@@ -2,7 +2,6 @@
 
 namespace App\Controller\Api\V1;
 
-use App\Constants\SocketConstants;
 use Hyperf\Di\Annotation\Inject;
 use Hyperf\HttpServer\Annotation\Controller;
 use Hyperf\HttpServer\Annotation\RequestMapping;
@@ -17,6 +16,7 @@ use App\Model\Group\UsersGroupNotice;
 use App\Amqp\Producer\ChatMessageProducer;
 use App\Service\SocketRoomService;
 use App\Service\GroupService;
+use App\Constants\SocketConstants;
 
 /**
  * Class GroupController
diff --git a/app/Controller/Api/V1/TalkController.php b/app/Controller/Api/V1/TalkController.php
index 4d16f1d..5093c85 100644
--- a/app/Controller/Api/V1/TalkController.php
+++ b/app/Controller/Api/V1/TalkController.php
@@ -2,7 +2,6 @@
 
 namespace App\Controller\Api\V1;
 
-use App\Constants\SocketConstants;
 use Hyperf\Di\Annotation\Inject;
 use Hyperf\HttpServer\Annotation\Controller;
 use Hyperf\HttpServer\Annotation\RequestMapping;
@@ -22,6 +21,7 @@ use App\Service\UploadService;
 use App\Amqp\Producer\ChatMessageProducer;
 use App\Cache\LastMsgCache;
 use App\Cache\UnreadTalkCache;
+use App\Constants\SocketConstants;
 
 /**
  * Class TalkController
diff --git a/app/Helper/StringHelper.php b/app/Helper/StringHelper.php
new file mode 100644
index 0000000..74bce09
--- /dev/null
+++ b/app/Helper/StringHelper.php
@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Helper;
+
+/**
+ * 字符串助手类
+ *
+ * Class StringHelper
+ * @package App\Helper
+ */
+class StringHelper
+{
+    /**
+     * 将字符串转换成二进制
+     *
+     * @param string $str
+     * @return string
+     */
+    public static function str2Bin(string $str): string
+    {
+        //列出每个字符
+        $arr = preg_split('/(?<!^)(?!$)/u', $str);
+        //unpack字符
+        foreach ($arr as &$v) {
+            $temp = unpack('H*', $v);
+            $v = base_convert($temp[1], 16, 2);
+            unset($temp);
+        }
+
+        return join(' ', $arr);
+    }
+
+    /**
+     * 将二进制转换成字符串
+     *
+     * @param string $str
+     * @return string
+     */
+    public static function bin2Str(string $str): string
+    {
+        $arr = explode(' ', $str);
+        foreach ($arr as &$v) {
+            $v = pack('H' . strlen(base_convert($v, 2, 16)), base_convert($v, 2, 16));
+        }
+
+        return join('', $arr);
+    }
+}
diff --git a/app/Model/Chat/ChatRecordsDelete.php b/app/Model/Chat/ChatRecordsDelete.php
index f6226e1..0de9b45 100644
--- a/app/Model/Chat/ChatRecordsDelete.php
+++ b/app/Model/Chat/ChatRecordsDelete.php
@@ -37,5 +37,10 @@ class ChatRecordsDelete extends BaseModel
      *
      * @var array
      */
-    protected $casts = ['id' => 'integer', 'record_id' => 'integer', 'user_id' => 'integer', 'created_at' => 'datetime'];
+    protected $casts = [
+        'id' => 'integer',
+        'record_id' => 'integer',
+        'user_id' => 'integer',
+        'created_at' => 'datetime'
+    ];
 }
diff --git a/app/Model/FileSplitUpload.php b/app/Model/FileSplitUpload.php
index 4966dd7..13d0af2 100644
--- a/app/Model/FileSplitUpload.php
+++ b/app/Model/FileSplitUpload.php
@@ -50,7 +50,6 @@ class FileSplitUpload extends BaseModel
         'upload_at'
     ];
 
-
     /**
      * The attributes that should be cast to native types.
      *
diff --git a/app/Model/Group/UsersGroup.php b/app/Model/Group/UsersGroup.php
index 7008ea1..ed48a83 100644
--- a/app/Model/Group/UsersGroup.php
+++ b/app/Model/Group/UsersGroup.php
@@ -69,7 +69,8 @@ class UsersGroup extends BaseModel
      * @param int $group_id 群ID
      * @return mixed
      */
-    public static function isManager(int $user_id,int $group_id){
+    public static function isManager(int $user_id, int $group_id)
+    {
         return self::where('id', $group_id)->where('user_id', $user_id)->exists();
     }
 
@@ -82,6 +83,6 @@ class UsersGroup extends BaseModel
      */
     public static function isMember(int $group_id, int $user_id)
     {
-        return UsersGroupMember::where('group_id', $group_id)->where('user_id', $user_id)->where('status', 0)->exists() ? true : false;
+        return UsersGroupMember::where('group_id', $group_id)->where('user_id', $user_id)->where('status', 0)->exists();
     }
 }
diff --git a/app/Model/UsersChatList.php b/app/Model/UsersChatList.php
index 4f5ff4e..eb81605 100644
--- a/app/Model/UsersChatList.php
+++ b/app/Model/UsersChatList.php
@@ -118,7 +118,10 @@ class UsersChatList extends BaseModel
      */
     public static function topItem(int $user_id, int $list_id, $is_top = true)
     {
-        return (bool)self::where('id', $list_id)->where('uid', $user_id)->update(['is_top' => $is_top ? 1 : 0, 'updated_at' => date('Y-m-d H:i:s')]);
+        return (bool)self::where('id', $list_id)->where('uid', $user_id)->update([
+            'is_top' => $is_top ? 1 : 0,
+            'updated_at' => date('Y-m-d H:i:s')
+        ]);
     }
 
     /**
@@ -131,12 +134,13 @@ class UsersChatList extends BaseModel
      */
     public static function delItem(int $user_id, int $id, $type = 1)
     {
+        $data = ['status' => 0, 'updated_at' => date('Y-m-d H:i:s')];
         if ($type == 1) {
-            return (bool)self::where('id', $id)->where('uid', $user_id)->update(['status' => 0, 'updated_at' => date('Y-m-d H:i:s')]);
+            return (bool)self::where('id', $id)->where('uid', $user_id)->update($data);
         } else if ($type == 2) {
-            return (bool)self::where('uid', $user_id)->where('friend_id', $id)->update(['status' => 0, 'updated_at' => date('Y-m-d H:i:s')]);
+            return (bool)self::where('uid', $user_id)->where('friend_id', $id)->update($data);
         } else {
-            return (bool)self::where('uid', $user_id)->where('group_id', $id)->update(['status' => 0, 'updated_at' => date('Y-m-d H:i:s')]);
+            return (bool)self::where('uid', $user_id)->where('group_id', $id)->update($data);
         }
     }
 
diff --git a/app/Model/UsersFriend.php b/app/Model/UsersFriend.php
index 1d92bf4..4d7a0b1 100644
--- a/app/Model/UsersFriend.php
+++ b/app/Model/UsersFriend.php
@@ -76,7 +76,7 @@ class UsersFriend extends BaseModel
               SELECT id as rid,user2 as uid,user1_remark as friend_remark from {$prefix}users_friends where user1 = {$uid} and `status` = 1
                 UNION all 
               SELECT id as rid,user1 as uid,user2_remark as friend_remark from {$prefix}users_friends where user2 = {$uid} and `status` = 1
-            ) tmp_table on tmp_table.uid = users.id  order by tmp_table.rid desc
+            ) tmp_table on tmp_table.uid = users.id
 SQL;
 
         $rows = Db::select($sql);
diff --git a/app/helper.php b/app/helper.php
index 83df55e..6a2eaa0 100644
--- a/app/helper.php
+++ b/app/helper.php
@@ -38,7 +38,7 @@ function redis()
 }
 
 /**
- * server 实例 基于 swoole server
+ * Server 实例 基于 Swoole Server
  *
  * @return \Swoole\Coroutine\Server|\Swoole\Server
  */
@@ -48,7 +48,9 @@ function server()
 }
 
 /**
- * websocket frame 实例
+ * WebSocket frame 实例
+ *
+ * @return mixed|Frame
  */
 function frame()
 {
@@ -56,7 +58,9 @@ function frame()
 }
 
 /**
- * websocket 实例
+ * WebSocketServer 实例
+ *
+ * @return mixed|WebSocketServer
  */
 function websocket()
 {
@@ -65,6 +69,8 @@ function websocket()
 
 /**
  * 缓存实例 简单的缓存
+ *
+ * @return mixed|\Psr\SimpleCache\CacheInterface
  */
 function cache()
 {
@@ -73,6 +79,8 @@ function cache()
 
 /**
  * 控制台日志
+ *
+ * @return StdoutLoggerInterface|mixed
  */
 function stdout_log()
 {
diff --git a/migrations/2020_11_04_153553_create_users_friends_table.php b/migrations/2020_11_04_153553_create_users_friends_table.php
index a1f6396..ac0dacd 100644
--- a/migrations/2020_11_04_153553_create_users_friends_table.php
+++ b/migrations/2020_11_04_153553_create_users_friends_table.php
@@ -4,6 +4,7 @@ use Hyperf\Database\Schema\Schema;
 use Hyperf\Database\Schema\Blueprint;
 use Hyperf\Database\Migrations\Migration;
 use Hyperf\DbConnection\Db;
+
 class CreateUsersFriendsTable extends Migration
 {
     /**
@@ -27,6 +28,7 @@ class CreateUsersFriendsTable extends Migration
             $table->engine = 'InnoDB';
 
             $table->index(['user1', 'user2'], 'idx_user1_user2');
+            $table->index(['user2', 'user1'], 'idx_user2_user1');
         });
 
         $prefix = config('databases.default.prefix');