diff --git a/old/src/PointToolsBundle/DTO/Api/MetaPost.php b/old/src/PointToolsBundle/DTO/Api/MetaPost.php
deleted file mode 100644
index 3e240fc..0000000
--- a/old/src/PointToolsBundle/DTO/Api/MetaPost.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-
-namespace src\PointToolsBundle\DTO\Api;
-
-use src\PointToolsBundle\DTO\Api\Comment;
-use src\PointToolsBundle\DTO\Api\Post;
-use src\PointToolsBundle\DTO\Api\ValidableInterface;
-
-class MetaPost implements ValidableInterface
-{
-    /**
-     * @var Post|null
-     */
-    private $post;
-
-    /**
-     * @var Comment[]|null
-     */
-    private $comments;
-
-
-    public function getPost(): ?Post
-    {
-        return $this->post;
-    }
-
-    public function setPost(?Post $post): void
-    {
-        $this->post = $post;
-    }
-
-    /**
-     * @return Comment[]|null
-     */
-    public function getComments(): ?array
-    {
-        return $this->comments;
-    }
-
-    /**
-     * @param Comment[]|null $comments
-     */
-    public function setComments(?array $comments): void
-    {
-        $this->comments = $comments;
-    }
-
-    public function isValid(): bool
-    {
-        if (null !== $this->post && $this->post->isValid()) {
-            return true;
-        }
-
-        return false;
-    }
-}
\ No newline at end of file
diff --git a/old/src/PointToolsBundle/DTO/Api/Auth.php b/src/DTO/Api/Auth.php
similarity index 60%
rename from old/src/PointToolsBundle/DTO/Api/Auth.php
rename to src/DTO/Api/Auth.php
index 17d9e2e..9eca83e 100644
--- a/old/src/PointToolsBundle/DTO/Api/Auth.php
+++ b/src/DTO/Api/Auth.php
@@ -1,26 +1,14 @@
 <?php
+declare(strict_types=1);
 
-namespace src\PointToolsBundle\DTO\Api;
-
-use src\PointToolsBundle\DTO\Api\ValidableInterface;
+namespace App\DTO\Api;
 
+/** TODO: Refactor to public readonly */
 class Auth implements ValidableInterface
 {
-    /**
-     * @var string|null
-     */
-    private $token;
-
-    /**
-     * @var string|null
-     */
-    private $csRfToken;
-
-    /**
-     * @var string|null
-     */
-    private $error;
-
+    private ?string $token;
+    private ?string $csRfToken;
+    private ?string $error;
 
     public function getToken(): ?string
     {
@@ -54,10 +42,6 @@ class Auth implements ValidableInterface
 
     public function isValid(): bool
     {
-        if (null !== $this->token && null !== $this->csRfToken && null === $this->error) {
-            return true;
-        }
-
-        return false;
+        return null !== $this->token && null !== $this->csRfToken && null === $this->error;
     }
-}
\ No newline at end of file
+}
diff --git a/old/src/PointToolsBundle/DTO/Api/Comment.php b/src/DTO/Api/Comment.php
similarity index 66%
rename from old/src/PointToolsBundle/DTO/Api/Comment.php
rename to src/DTO/Api/Comment.php
index 34884a7..550aeb2 100644
--- a/old/src/PointToolsBundle/DTO/Api/Comment.php
+++ b/src/DTO/Api/Comment.php
@@ -1,46 +1,18 @@
 <?php
+declare(strict_types=1);
 
-namespace src\PointToolsBundle\DTO\Api;
-
-use src\PointToolsBundle\DTO\Api\User;
-use src\PointToolsBundle\DTO\Api\ValidableInterface;
+namespace App\DTO\Api;
 
+/** TODO: Refactor to public readonly */
 class Comment implements ValidableInterface
 {
-    /**
-     * @var string|null
-     */
-    private $postId;
-
-    /**
-     * @var int|null
-     */
-    private $number;
-
-    /**
-     * @var int|null
-     */
-    private $toCommentId;
-
-    /**
-     * @var string|null
-     */
-    private $created;
-
-    /**
-     * @var string|null
-     */
-    private $text;
-
-    /**
-     * @var User|null
-     */
-    private $author;
-
-    /**
-     * @var bool|null
-     */
-    private $isRec;
+    private ?string $postId;
+    private ?int $number;
+    private ?int $toCommentId;
+    private ?string $created;
+    private ?string $text;
+    private ?User $author;
+    private ?bool $isRec;
 
 
     public function getPostId(): ?string
@@ -120,10 +92,6 @@ class Comment implements ValidableInterface
 
     public function isValid(): bool
     {
-        if (null !== $this->postId && null !== $this->number && null !== $this->author && null !== $this->text) {
-            return true;
-        }
-
-        return false;
+        return null !== $this->postId && null !== $this->number && null !== $this->author && null !== $this->text;
     }
-}
\ No newline at end of file
+}
diff --git a/src/DTO/Api/MetaPost.php b/src/DTO/Api/MetaPost.php
new file mode 100644
index 0000000..9e31a1b
--- /dev/null
+++ b/src/DTO/Api/MetaPost.php
@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+
+namespace App\DTO\Api;
+
+/** TODO: Refactor to public readonly */
+class MetaPost implements ValidableInterface
+{
+    private ?Post $post;
+    /** @var Comment[]|null */
+    private ?array $comments;
+
+
+    public function getPost(): ?Post
+    {
+        return $this->post;
+    }
+
+    public function setPost(?Post $post): void
+    {
+        $this->post = $post;
+    }
+
+    /** @return Comment[]|null */
+    public function getComments(): ?array
+    {
+        return $this->comments;
+    }
+
+    /** @param Comment[]|null $comments */
+    public function setComments(?array $comments): void
+    {
+        $this->comments = $comments;
+    }
+
+    public function isValid(): bool
+    {
+        return null !== $this->post && $this->post->isValid();
+    }
+}
diff --git a/old/src/PointToolsBundle/DTO/Api/Post.php b/src/DTO/Api/Post.php
similarity index 67%
rename from old/src/PointToolsBundle/DTO/Api/Post.php
rename to src/DTO/Api/Post.php
index e8d1819..7cdea5a 100644
--- a/old/src/PointToolsBundle/DTO/Api/Post.php
+++ b/src/DTO/Api/Post.php
@@ -1,52 +1,21 @@
 <?php
+declare(strict_types=1);
 
-namespace src\PointToolsBundle\DTO\Api;
-
-use src\PointToolsBundle\DTO\Api\User;
-use src\PointToolsBundle\DTO\Api\ValidableInterface;
+namespace App\DTO\Api;
 
+/** TODO: Refactor to public readonly */
 class Post implements ValidableInterface
 {
-    /**
-     * @var string|null
-     */
-    private $id;
-
-    /**
-     * @var string[]|null
-     */
-    private $tags;
-
-    /**
-     * @var string[]|null
-     */
-    private $files;
-
-    /**
-     * @var User|null
-     */
-    private $author;
-
-    /**
-     * @var string|null
-     */
-    private $text;
-
-    /**
-     * @var string|null
-     */
-    private $created;
-
-    /**
-     * @var string|null
-     */
-    private $type;
-
-    /**
-     * @var bool|null
-     */
-    private $private;
-
+    private ?string $id;
+    /** @var string[]|null */
+    private ?array $tags;
+    /** @var string[]|null */
+    private ?array $files;
+    private ?User $author;
+    private ?string $text;
+    private ?string $created;
+    private ?string $type;
+    private ?bool $private;
 
     public function getId(): ?string
     {
@@ -58,9 +27,7 @@ class Post implements ValidableInterface
         $this->id = $id;
     }
 
-    /**
-     * @return string[]|null
-     */
+    /** @return string[]|null */
     public function getTags(): ?array
     {
         return $this->tags;
@@ -71,9 +38,7 @@ class Post implements ValidableInterface
         $this->tags = $tags;
     }
 
-    /**
-     * @return string[]|null
-     */
+    /** @return string[]|null */
     public function getFiles(): ?array
     {
         return $this->files;
@@ -144,18 +109,13 @@ class Post implements ValidableInterface
 
     public function isValid(): bool
     {
-        if (
-            null !== $this->id &&
+        return null !== $this->id &&
             null !== $this->author &&
             $this->author->isValid() &&
             null !== $this->text &&
-            null !== $this->created// &&
+            null !== $this->created
             // @todo check type existence in incoming data
             //null !== $this->type
-        ) {
-            return true;
-        }
-
-        return false;
+        ;
     }
 }
\ No newline at end of file
diff --git a/old/src/PointToolsBundle/DTO/Api/PostsPage.php b/src/DTO/Api/PostsPage.php
similarity index 50%
rename from old/src/PointToolsBundle/DTO/Api/PostsPage.php
rename to src/DTO/Api/PostsPage.php
index 782669f..d0e4fa1 100644
--- a/old/src/PointToolsBundle/DTO/Api/PostsPage.php
+++ b/src/DTO/Api/PostsPage.php
@@ -1,33 +1,22 @@
 <?php
+declare(strict_types=1);
 
-namespace src\PointToolsBundle\DTO\Api;
-
-use src\PointToolsBundle\DTO\Api\MetaPost;
-use src\PointToolsBundle\DTO\Api\ValidableInterface;
+namespace App\DTO\Api;
 
+/** TODO: Refactor to public readonly */
 class PostsPage implements ValidableInterface
 {
-    /**
-     * @var MetaPost[]|null
-     */
-    private $posts;
+    /** @var MetaPost[]|null */
+    private ?array $posts;
+    private ?bool $hasNext;
 
-    /**
-     * @var bool|null
-     */
-    private $hasNext;
-
-    /**
-     * @return MetaPost[]|null
-     */
+    /** @return MetaPost[]|null */
     public function getPosts(): ?array
     {
         return $this->posts;
     }
 
-    /**
-     * @param MetaPost[]|null $posts
-     */
+    /** @param MetaPost[]|null $posts */
     public function setPosts(?array $posts): void
     {
         $this->posts = $posts;
@@ -45,10 +34,6 @@ class PostsPage implements ValidableInterface
 
     public function isValid(): bool
     {
-        if (null !== $this->posts) {
-            return true;
-        }
-
-        return false;
+        return null !== $this->posts;
     }
-}
\ No newline at end of file
+}
diff --git a/old/src/PointToolsBundle/DTO/Api/User.php b/src/DTO/Api/User.php
similarity index 70%
rename from old/src/PointToolsBundle/DTO/Api/User.php
rename to src/DTO/Api/User.php
index 76657f8..345ccda 100644
--- a/old/src/PointToolsBundle/DTO/Api/User.php
+++ b/src/DTO/Api/User.php
@@ -1,81 +1,25 @@
 <?php
+declare(strict_types=1);
 
-namespace src\PointToolsBundle\DTO\Api;
-
-use src\PointToolsBundle\DTO\Api\ValidableInterface;
+namespace App\DTO\Api;
 
+/** TODO: Refactor to public readonly */
 class User implements ValidableInterface
 {
-    /**
-     * @var string|null
-     */
-    private $id;
-
-    /**
-     * @var string|null
-     */
-    private $login;
-
-    /**
-     * @var string|null
-     */
-    private $name;
-
-    /**
-     * @var string|null
-     */
-    private $about;
-
-    /**
-     * @var string|null
-     */
-    private $xmpp;
-
-    /**
-     * @var string|null
-     */
-    private $created;
-
-    /**
-     * @var bool|null
-     */
-    private $gender;
-
-    /**
-     * @var bool|null
-     */
-    private $denyAnonymous;
-
-    /**
-     * @var bool|null
-     */
-    private $private;
-
-    /**
-     * @var string|null
-     */
-    private $birthDate;
-
-    /**
-     * @var string|null
-     */
-    private $homepage;
-
-    /**
-     * @var string|null
-     */
-    private $email;
-
-    /**
-     * @var string|null
-     */
-    private $location;
-
-    /**
-     * @var string|null
-     */
-    private $error;
-
+    private ?string $id;
+    private ?string $login;
+    private ?string $name;
+    private ?string $about;
+    private ?string $xmpp;
+    private ?string $created;
+    private ?bool $gender;
+    private ?bool $denyAnonymous;
+    private ?bool $private;
+    private ?string $birthDate;
+    private ?string $homepage;
+    private ?string $email;
+    private ?string $location;
+    private ?string $error;
 
     public function getId(): ?string
     {
@@ -219,10 +163,6 @@ class User implements ValidableInterface
 
     public function isValid(): bool
     {
-        if (null === $this->error && null !== $this->id && null !== $this->login) {
-            return true;
-        }
-
-        return false;
+        return null === $this->error && null !== $this->id && null !== $this->login;
     }
-}
\ No newline at end of file
+}
diff --git a/old/src/PointToolsBundle/DTO/Api/ValidableInterface.php b/src/DTO/Api/ValidableInterface.php
similarity index 59%
rename from old/src/PointToolsBundle/DTO/Api/ValidableInterface.php
rename to src/DTO/Api/ValidableInterface.php
index 20cd4ce..b7050cd 100644
--- a/old/src/PointToolsBundle/DTO/Api/ValidableInterface.php
+++ b/src/DTO/Api/ValidableInterface.php
@@ -1,7 +1,9 @@
 <?php
-namespace src\PointToolsBundle\DTO\Api;
+declare(strict_types=1);
+
+namespace App\DTO\Api;
 
 interface ValidableInterface
 {
     public function isValid(): bool;
-}
\ No newline at end of file
+}