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vendor/lexik/jwt-authentication-bundle/Subscriber/AdditionalAccessTokenClaimsAndHeaderSubscriber.php

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+<?php
+
+namespace Lexik\Bundle\JWTAuthenticationBundle\Subscriber;
+
+use Lexik\Bundle\JWTAuthenticationBundle\Event\JWTCreatedEvent;
+use Lexik\Bundle\JWTAuthenticationBundle\Events;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+final class AdditionalAccessTokenClaimsAndHeaderSubscriber implements EventSubscriberInterface
+{
+    /**
+     * @var int|null
+     */
+    private $ttl;
+
+    public function __construct(?int $ttl)
+    {
+        $this->ttl = $ttl;
+    }
+
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            Events::JWT_CREATED => [
+                ['addClaims'],
+            ],
+        ];
+    }
+
+    public function addClaims(JWTCreatedEvent $event): void
+    {
+        $claims = [
+            'jti' => uniqid('', true),
+            'iat' => time(),
+            'nbf' => time(),
+        ];
+        $data = $event->getData();
+        if (!array_key_exists('exp', $data) && $this->ttl > 0) {
+            $claims['exp'] = time() + $this->ttl;
+        }
+        $event->setData(array_merge($claims, $data));
+    }
+}