implement GenericEvent

composer.json

@@ -14,5 +14,12 @@
         }
     ],
     "minimum-stability": "stable",
-    "require": {}
+    "require": {
+        "league/event": ">=3.0.3",
+        "psr/event-dispatcher": ">=1.0.0",
+        "symfony/event-dispatcher": ">=8.1.2",
+        "symfony/event-dispatcher-contracts": ">=3.7.1",
+        "symfony/deprecation-contracts": ">=3.7.1",
+        "symfony/event-dispatcher": ">=8.1.2"
+    }
 }

src/Potter/Event.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Potter;
+
+use \League\Event\HasEventName;
+use \Symfony\Component\EventDispatcher\GenericEvent;
+
+final class Event extends GenericEvent implements HasEventName
+{
+    public function __construct(mixed $subject = null, array $arguments = []) {
+        parent::__construct($subject, $arguments);
+    }
+    
+    public function eventName(): string
+    {
+        return is_string($subject = $this->getSubject()) ? 
+            $subject : get_class($this);
+    }
+}