- BC Break: _PHP_ namespaces changed (PSR-4 standard). The _root_ namespace for all _PF_ related scripts is Exodus4D\Pathfinder

- BC Break: Project folder structure changed. Removed `app/main` dir.
- BC Break: Core _PHP_ framework + dependencies moved into `composer.json` and are no longer part of this repo

app/Lib/Socket/SocketInterface.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Exodus 4D
+ * Date: 16.02.2019
+ * Time: 11:26
+ */
+
+namespace Exodus4D\Pathfinder\Lib\Socket;
+
+
+use React\Promise;
+
+interface SocketInterface {
+
+    /**
+     * @param string $action
+     * @param null $data
+     * @return Promise\PromiseInterface
+     */
+    public function write(string $action, $data = null) : Promise\PromiseInterface;
+
+    /**
+     * @param string $class
+     * @param string $uri
+     * @param array $options
+     * @return SocketInterface
+     */
+    public static function factory(string $class, string $uri, array $options = []) : SocketInterface;
+}