Добавил колбек

.env.example

@@ -53,4 +53,10 @@ ACCESS_GROUPS="notify,friends,photos,audio,video,stories,pages,status,notes,mess
 USERAGENT = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36'
 
 # ID приложения ВК по умолчанию
-APP_ID = '6660888'
+APP_ID = '6660888'
+
+# Домен сервера для подключения CallBack API
+SERVER_DOMAIN =
+
+# Произвольный ключ для подключения к CallBack серверу
+CALLBACK_SECRET_KEY = 

system/API/CallBack.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace VK\API;
+
+class CallBack extends CallBackAbstract
+{
+    /**
+     * Адрес для создания колбек-сервера
+     * 
+     * @var string
+     */
+    private $url;
+
+    /**
+     * Пользовательский ключ колбек-сессии
+     * 
+     * @var string
+     */
+    private $secret_key;
+
+    /**
+     * Ключ подтверждения колбек сессии
+     * 
+     * @var string
+     */
+    private $confirmation_token;
+
+    /**
+     * @var int
+     */
+    private $group_id;
+
+    public function __construct(object $group, array $params = []){
+        $this->secret_key = $_ENV['CALLBACK_SECRET_KEY'];
+        $this->url = $_ENV['SERVER_DOMAIN'];
+        $this->group_id = $group->id;
+        $this->group_id->request('groups.addCallbackServer', [
+            'group_id' => $this->group_id,
+            'url' => $this->url,
+            'title' => $this->group_id . 'CallBackServer',
+            'secret_key' => $this->secret_key
+        ]);
+        $this->confirmation_token = request('groups.getCallbackConfirmationCode', [$this->group_id]);
+        Curl::post($vk, [$this->confirmation_token]);
+    }
+}

system/API/CallBackAbstract.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace VK\API;
+
+abstract class CallBackAbstract
+{
+    abstract public function __construct(object $group, array $params = []);
+}

system/Robots/Group.php

@@ -76,11 +76,12 @@ class Group extends RobotAbstract
 
     public function longpoll(...$params): LongPoll
     {
-        return  new LongPoll($this, $params);
+        return new LongPoll($this, $params);
     }
 
     public function callback()
     {
+        return new CallBack($this, $params);
     }
 
     protected function genToken(): string