diff --git a/README.md b/README.md
index 76e5efc..90a5138 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,6 @@ To read messages, use KevaChat [webapp](https://github.com/kevachat/webapp), [ge
 ## Components
 
 * [kevachat/kevacoin-php](https://github.com/kevachat/kevacoin-php) - KevaCoin library for PHP 8
-* [yggverse/nps-php](https://github.com/YGGverse/nps-php) - PHP 8 / Composer Library for NPS Protocol
-* [gregwar/captcha](https://github.com/Gregwar/Captcha) - Captcha library to prevent spam abuses
-* [ixnode/php-cli-image](https://github.com/ixnode/php-cli-image) - Library converts captcha to ASCII format
\ No newline at end of file
+* [cboden/ratchet](https://github.com/ratchetphp/Ratchet) - Asynchronous Socket server
+* [gregwar/captcha](https://github.com/Gregwar/Captcha) - Captcha library to prevent spam abuse
+* [ixnode/php-cli-image](https://github.com/ixnode/php-cli-image) - Library converts captcha to ASCII/CLI format
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 253d5f3..b078e88 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,6 @@
         "kevachat/kevacoin": "^1.10",
         "gregwar/captcha": "^1.2",
         "ixnode/php-cli-image": "^0.1.2",
-        "yggverse/nps": "^1.3"
+        "cboden/ratchet": "^0.4.4"
     }
 }
diff --git a/config/example.json b/config/example.json
index ca7557c..db33132 100644
--- a/config/example.json
+++ b/config/example.json
@@ -20,93 +20,101 @@
         "server":
         {
             "host":"127.0.0.1",
-            "port":1915,
-            "size":3072,
-            "line":1024
+            "port":1915
         },
-        "session":
+        "captcha":
         {
-            "timeout":3600,
-            "captcha":
+            "length":3,
+            "chars":"1234567890",
+            "dimensions":
             {
-                "length":3,
-                "chars":"1234567890",
-                "dimensions":
-                {
-                    "width":100,
-                    "height":40
-                },
-                "background":
-                {
-                    "r":0,
-                    "g":0,
-                    "b":0
-                },
-                "ascii":
-                {
-                    "width": 50
-                }
+                "width":100,
+                "height":40
+            },
+            "background":
+            {
+                "r":0,
+                "g":0,
+                "b":0
+            },
+            "ascii":
+            {
+                "width": 50
             }
         },
-        "action":
+        "event":
         {
-            "start":
+            "init":
             {
                 "debug":
                 {
                     "enabled":true,
-                    "template":"[{time}] server started at {host}:{port} balance: {keva}"
+                    "template":"[{time}] [init] listen on {host}:{port} balance: {keva}"
                 }
             },
-            "welcome":
+            "open":
             {
-                "message":
+                "response":
                 [
                     "\u001b[34m\u001b[1mWelcome to KevaChat!\u001b[0m",
-                    "\u001b[34mEnter captcha to confirm you are human:\u001b[0m"
+                    "\u001b[34mEnter captcha to confirm you are human\u001b[0m"
                 ],
                 "debug":
                 {
                     "enabled":true,
-                    "template":"[{time}] [welcome] {host}:{port} captcha: {code}"
+                    "template":"[{time}] [open] {host}#{crid} captcha: {code}"
                 }
             },
-            "pending":
+            "message":
             {
-                "message":
+                "response":
                 {
-                    "success":
-                    [
-                        "\u001b[34mLooks good, now enter your message:\u001b[0m"
-                    ],
-                    "failure":
-                    [
-                        "\u001b[31mSomething went wrong, try again later!\u001b[0m"
-                    ]
+                    "captcha":
+                    {
+                        "success":
+                        [
+                            "\u001b[34mGood, now enter your message!\u001b[0m"
+                        ],
+                        "failure":
+                        [
+                            "\u001b[31mIncorrect captcha code, try again later!\u001b[0m"
+                        ]
+                    },
+                    "submit":
+                    {
+                        "success":
+                        [
+                            "\u001b[32mThanks, your message successfully sent!\u001b[0m"
+                        ],
+                        "failure":
+                        {
+                            "internal":
+                            [
+                                "\u001b[31mSomething went wrong, please make your feedback!\u001b[0m"
+                            ]
+                        }
+                    }
                 },
                 "debug":
                 {
                     "enabled":true,
-                    "template":"[{time}] [pending] {host}:{port} captcha: {code} sent: {sent}"
+                    "template":"[{time}] [message] {host}#{crid} captcha: {code} size: {size} bytes \n\r{sent}."
                 }
             },
-            "handler":
+            "close":
             {
-                "message":
+                "debug":
                 {
-                    "success":
-                    [
-                        "\u001b[32mThanks, your message successfully sent!\u001b[0m"
-                    ],
-                    "failure":
-                    [
-                        "\u001b[31mSomething went wrong, please make your feedback!\u001b[0m"
-                    ]
-                },
+                    "enabled":true,
+                    "template":"[{time}] [close] {host}#{crid}"
+                }
+            },
+            "error":
+            {
                 "debug":
                 {
                     "enabled":true,
-                    "template":"[{time}] [handler] {host}:{port} captcha: {code} sent: {sent} length: {size} bytes {data}"
+                    "template":"[{time}] [error] {host}#{crid} {info}"
                 }
             }
         }
diff --git a/src/Server/Ratchet.php b/src/Server/Ratchet.php
new file mode 100644
index 0000000..f0daa66
--- /dev/null
+++ b/src/Server/Ratchet.php
@@ -0,0 +1,262 @@
+<?php
+
+namespace Kevachat\Npsapp\Server;
+
+use \Ratchet\MessageComponentInterface;
+
+class Ratchet implements MessageComponentInterface
+{
+    private \Kevachat\Kevacoin\Client $_kevacoin;
+
+    private object $_config;
+
+    public function __construct(
+        object $config
+    ) {
+        // Init config
+        $this->_config = $config;
+
+        // Init KevaCoin
+        $this->_kevacoin = new \Kevachat\Kevacoin\Client(
+            $this->_config->kevacoin->server->protocol,
+            $this->_config->kevacoin->server->host,
+            $this->_config->kevacoin->server->port,
+            $this->_config->kevacoin->server->username,
+            $this->_config->kevacoin->server->password
+        );
+
+        // Validate funds
+        if ((float) $this->_kevacoin->getBalance($this->_config->kevacoin->wallet->account) <= 0)
+        {
+            throw new \Exception(); // @TODO
+        }
+
+        // Dump event on enabled
+        if ($this->_config->nps->event->init->debug->enabled)
+        {
+            print(
+                str_ireplace(
+                    [
+                        '{time}',
+                        '{host}',
+                        '{port}',
+                        '{keva}'
+                    ],
+                    [
+                        (string) date('c'),
+                        (string) $this->_config->nps->server->host,
+                        (string) $this->_config->nps->server->port,
+                        (float) $this->_kevacoin->getBalance(
+                            $this->_config->kevacoin->wallet->account
+                        )
+                    ],
+                    $this->_config->nps->event->init->debug->template
+                ) . PHP_EOL
+            );
+        }
+    }
+
+    public function onOpen(
+        \Ratchet\ConnectionInterface $connection
+    ) {
+        // Init config namespace
+        $config = $this->_config->nps;
+
+        // Build captcha
+        $captcha = new \Gregwar\Captcha\CaptchaBuilder(
+            null,
+            new \Gregwar\Captcha\PhraseBuilder(
+                $config->captcha->length,
+                $config->captcha->chars
+            )
+        );
+
+        $captcha->setBackgroundColor(
+            $config->captcha->background->r,
+            $config->captcha->background->g,
+            $config->captcha->background->b
+        );
+
+        $captcha->build(
+            $config->captcha->dimensions->width,
+            $config->captcha->dimensions->height
+        );
+
+        // Convert captcha image to ASCII response
+        $image = new \Ixnode\PhpCliImage\CliImage(
+            $captcha->get(),
+            $config->captcha->ascii->width
+        );
+
+        // Send response
+        $connection->send(
+            sprintf(
+                implode(
+                    PHP_EOL,
+                    $config->event->open->response
+                ) . PHP_EOL . $image->getAsciiString() . PHP_EOL
+            )
+        );
+
+        // Keep captcha phrase in connection
+        $connection->captcha = $captcha->getPhrase();
+
+        // Init connection confirmed
+        $connection->confirmed = false;
+
+        // Debug open event on enabled
+        if ($config->event->open->debug->enabled)
+        {
+            // Print debug from template
+            print(
+                str_ireplace(
+                    [
+                        '{time}',
+                        '{host}',
+                        '{crid}',
+                        '{code}'
+                    ],
+                    [
+                        (string) date('c'),
+                        (string) $connection->remoteAddress,
+                        (string) $connection->resourceId,
+                        (string) $connection->captcha
+                    ],
+                    $config->event->open->debug->template
+                ) . PHP_EOL
+            );
+        }
+    }
+
+    public function onMessage(
+        \Ratchet\ConnectionInterface $connection,
+        $request
+    ) {
+        // Init config namespace
+        $config = $this->_config->nps->event->message;
+
+        // Captcha request first for unconfirmed connections
+        if (!$connection->confirmed)
+        {
+            // Request match captcha
+            if ($request == $connection->captcha)
+            {
+                $connection->confirmed = true;
+
+                $connection->send(
+                    implode(
+                        PHP_EOL,
+                        $config->response->captcha->success
+                    ) . PHP_EOL
+                );
+            }
+
+            // Captcha request invalid
+            else
+            {
+                $connection->confirmed = false;
+
+                $connection->send(
+                    implode(
+                        PHP_EOL,
+                        $config->response->captcha->failure
+                    ) . PHP_EOL
+                );
+
+                // Drop connection or do something else..
+                $connection->close();
+            }
+        }
+
+        // @TODO compose request to KevaCoin, return transaction ID
+        else
+        {
+            // Save massage to kevacoin
+            /*
+            $connection->send(
+                implode(
+                    PHP_EOL,
+                    $config->response->captcha->failure
+                ) . PHP_EOL
+            );
+            */
+        }
+
+        // Debug message event on enabled
+        if ($config->debug->enabled)
+        {
+            print(
+                str_ireplace(
+                    [
+                        '{time}',
+                        '{host}',
+                        '{crid}',
+                        '{code}',
+                        '{sent}',
+                        '{size}'
+                    ],
+                    [
+                        (string) date('c'),
+                        (string) $connection->remoteAddress,
+                        (string) $connection->resourceId,
+                        (string) $connection->captcha,
+                        (string) str_replace('%', '%%', $request),
+                        (string) mb_strlen($request)
+                    ],
+                    $config->debug->template
+                ) . PHP_EOL
+            );
+        }
+    }
+
+    public function onClose(
+        \Ratchet\ConnectionInterface $connection
+    ) {
+        if ($this->_config->nps->event->close->debug->enabled)
+        {
+            print(
+                str_ireplace(
+                    [
+                        '{time}',
+                        '{host}',
+                        '{crid}'
+                    ],
+                    [
+                        (string) date('c'),
+                        (string) $connection->remoteAddress,
+                        (string) $connection->resourceId
+                    ],
+                    $this->_config->nps->event->close->debug->template
+                ) . PHP_EOL
+            );
+        }
+    }
+
+    public function onError(
+        \Ratchet\ConnectionInterface $connection,
+        \Exception $exception
+    ) {
+        if ($this->_config->nps->event->close->debug->enabled)
+        {
+            print(
+                str_ireplace(
+                    [
+                        '{time}',
+                        '{host}',
+                        '{crid}',
+                        '{info}'
+                    ],
+                    [
+                        (string) date('c'),
+                        (string) $connection->remoteAddress,
+                        (string) $connection->resourceId,
+                        (string) str_replace('%', '%%', $exception->getMessage())
+                    ],
+                    $this->_config->nps->event->error->debug->template
+                ) . PHP_EOL
+            );
+        }
+
+        $connection->close();
+    }
+}
\ No newline at end of file
diff --git a/src/app.php b/src/app.php
new file mode 100644
index 0000000..c62a2f4
--- /dev/null
+++ b/src/app.php
@@ -0,0 +1,30 @@
+<?php
+
+// Load dependencies
+require_once __DIR__ .
+             DIRECTORY_SEPARATOR . '..'.
+             DIRECTORY_SEPARATOR . 'vendor' .
+             DIRECTORY_SEPARATOR . 'autoload.php';
+
+// Init config
+$config = json_decode(
+    file_get_contents(
+        __DIR__ .
+        DIRECTORY_SEPARATOR . '..'.
+        DIRECTORY_SEPARATOR . 'config'.
+        DIRECTORY_SEPARATOR . (
+            isset($argv[1]) ? $argv[1] : 'example.json'
+        )
+    )
+);  if (!$config) throw new \Exception();
+
+// Start server
+$server = \Ratchet\Server\IoServer::factory(
+    new \Kevachat\Npsapp\Server\Ratchet(
+        $config
+    ),
+    $config->nps->server->port,
+    $config->nps->server->host
+);
+
+$server->run();
diff --git a/src/server.php b/src/server.php
deleted file mode 100644
index b538b94..0000000
--- a/src/server.php
+++ /dev/null
@@ -1,310 +0,0 @@
-<?php
-
-// Load dependencies
-require_once __DIR__ .
-             DIRECTORY_SEPARATOR . '..'.
-             DIRECTORY_SEPARATOR . 'vendor' .
-             DIRECTORY_SEPARATOR . 'autoload.php';
-
-// Init config
-$config = json_decode(
-    file_get_contents(
-        __DIR__ .
-        DIRECTORY_SEPARATOR . '..'.
-        DIRECTORY_SEPARATOR . 'config'.
-        DIRECTORY_SEPARATOR . (
-            isset($argv[1]) ? $argv[1] : 'example.json'
-        )
-    )
-);  if (!$config) exit;
-
-// Init KevaCoin
-$kevacoin = new \Kevachat\Kevacoin\Client(
-    $config->kevacoin->server->protocol,
-    $config->kevacoin->server->host,
-    $config->kevacoin->server->port,
-    $config->kevacoin->server->username,
-    $config->kevacoin->server->password
-);
-
-if ((float) $kevacoin->getBalance($config->kevacoin->wallet->account) <= 0) exit;
-
-// Init session
-$session = [];
-
-// Init server
-$server = new \Yggverse\Nps\Server(
-    $config->nps->server->host,
-    $config->nps->server->port,
-    $config->nps->server->size,
-    $config->nps->server->line
-);
-
-// Init welcome function
-$server->setWelcome(
-    function (
-        string $connect
-    ): ?string
-    {
-        global $config,
-               $session;
-
-        // Cleanup expired sessions
-        foreach ($session as $key => $value)
-        {
-            if ($value['time'] + $config->nps->session->timeout < time())
-            {
-                unset(
-                    $session[$key]
-                );
-            }
-        }
-
-        // Build connection URL #72811
-        $url = sprintf(
-            'nex://%s',
-            $connect
-        );
-
-        // Init new session
-        $session[$connect] =
-        [
-            'time' => time(),
-            'host' => parse_url(
-                $url,
-                PHP_URL_HOST
-            ),
-            'port' => parse_url(
-                $url,
-                PHP_URL_PORT
-            ),
-            'code' => null
-        ];
-
-        // Build captcha
-        $captcha = new \Gregwar\Captcha\CaptchaBuilder(
-            null,
-            new \Gregwar\Captcha\PhraseBuilder(
-                $config->nps->session->captcha->length,
-                $config->nps->session->captcha->chars
-            )
-        );
-
-        $captcha->setBackgroundColor(
-            $config->nps->session->captcha->background->r,
-            $config->nps->session->captcha->background->g,
-            $config->nps->session->captcha->background->b
-        );
-
-        $captcha->build(
-            $config->nps->session->captcha->dimensions->width,
-            $config->nps->session->captcha->dimensions->height
-        );
-
-        // Set captcha value to the session code
-        $session[$connect]['code'] = $captcha->getPhrase();
-
-        // Create ASCII confirmation code
-        $image = new \Ixnode\PhpCliImage\CliImage(
-            $captcha->get(),
-            $config->nps->session->captcha->ascii->width
-        );
-
-        // Debug request on enabled
-        if ($config->nps->action->welcome->debug->enabled)
-        {
-            // Print debug from template
-            print(
-                str_ireplace(
-                    [
-                        '{time}',
-                        '{host}',
-                        '{port}',
-                        '{code}'
-                    ],
-                    [
-                        (string) date('c'),
-                        (string) $session[$connect]['host'],
-                        (string) $session[$connect]['port'],
-                        (string) $session[$connect]['code']
-                    ],
-                    $config->nps->action->welcome->debug->template
-                ) . PHP_EOL
-            );
-        }
-
-        return sprintf(
-            implode(
-                PHP_EOL,
-                $config->nps->action->welcome->message
-            ) . PHP_EOL . $image->getAsciiString() . PHP_EOL
-        );
-    }
-);
-
-// Init pending function
-$server->setPending(
-    function (
-        string $request,
-        string $connect
-    ): ?string
-    {
-        global $config,
-               $session;
-
-        // Filter request
-        $request = trim(
-            $request
-        );
-
-        // Debug request on enabled
-        if ($config->nps->action->pending->debug->enabled)
-        {
-            // Print debug from template
-            print(
-                str_ireplace(
-                    [
-                        '{time}',
-                        '{host}',
-                        '{port}',
-                        '{sent}',
-                        '{code}'
-                    ],
-                    [
-                        (string) date('c'),
-                        (string) $session[$connect]['host'],
-                        (string) $session[$connect]['port'],
-                        (string) $request,
-                        (string) $session[$connect]['code']
-                    ],
-                    $config->nps->action->pending->debug->template
-                ) . PHP_EOL
-            );
-        }
-
-        // Session valid
-        if ($session[$connect]['code'] == $request)
-        {
-            // Return success message
-            return implode(
-                PHP_EOL,
-                $config->nps->action->pending->message->success
-            ) . PHP_EOL;
-        }
-
-        // @TODO disconnect, stop handler
-
-        // Cleanup session
-        unset($session[$connect]);
-
-        // Return failure message
-        return implode(
-            PHP_EOL,
-            $config->nps->action->pending->message->failure
-        ) . PHP_EOL;
-    }
-);
-
-// Init handler function
-$server->setHandler(
-    function (
-          bool $success,
-        string $content,
-        string $request,
-        string $connect
-    ): ?string
-    {
-        global $config,
-               $session;
-
-        // Filter request
-        $request = trim(
-            $request
-        );
-
-        // Filter content
-        $content = trim(
-            $content
-        );
-
-        // Build response
-        if ($session[$connect]['code'] == $request)
-        {
-            // @TODO save content in blockchain with kevacoin-php
-
-            $response = implode(
-                PHP_EOL,
-                $config->nps->action->handler->message->success
-            ) . PHP_EOL;
-        }
-
-        else
-        {
-            $response = implode(
-                PHP_EOL,
-                $config->nps->action->handler->message->failure
-            ) . PHP_EOL;
-        }
-
-        // Debug request on enabled
-        if ($config->nps->action->handler->debug->enabled)
-        {
-            // Print debug from template
-            print(
-                str_ireplace(
-                    [
-                        '{time}',
-                        '{host}',
-                        '{port}',
-                        '{code}',
-                        '{sent}',
-                        '{size}',
-                        '{data}'
-                    ],
-                    [
-                        (string) date('c'),
-                        (string) $session[$connect]['host'],
-                        (string) $session[$connect]['port'],
-                        (string) $session[$connect]['code'],
-                        (string) str_replace('%', '%%', $request),
-                        (string) mb_strlen($content),
-                        (string) PHP_EOL . $content,
-                    ],
-                    $config->nps->action->handler->debug->template
-                ) . PHP_EOL
-            );
-        }
-
-        // Cleanup session
-        unset($session[$connect]);
-
-        // Result
-        return $response;
-    }
-);
-
-// Start server
-if ($config->nps->action->start->debug->enabled)
-{
-    print(
-        str_ireplace(
-            [
-                '{time}',
-                '{host}',
-                '{port}',
-                '{keva}'
-            ],
-            [
-                date('c'),
-                $config->nps->server->host,
-                $config->nps->server->port,
-                $kevacoin->getBalance(
-                    $config->kevacoin->wallet->account
-                )
-            ],
-            $config->nps->action->start->debug->template
-        ) . PHP_EOL
-    );
-}
-
-$server->start();