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vendor/laravel/serializable-closure/src/Serializers/Signed.php

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+<?php
+
+namespace Laravel\SerializableClosure\Serializers;
+
+use Laravel\SerializableClosure\Contracts\Serializable;
+use Laravel\SerializableClosure\Exceptions\InvalidSignatureException;
+use Laravel\SerializableClosure\Exceptions\MissingSecretKeyException;
+
+class Signed implements Serializable
+{
+    /**
+     * The signer that will sign and verify the closure's signature.
+     *
+     * @var \Laravel\SerializableClosure\Contracts\Signer|null
+     */
+    public static $signer;
+
+    /**
+     * The closure to be serialized/unserialized.
+     *
+     * @var \Closure
+     */
+    protected $closure;
+
+    /**
+     * Creates a new serializable closure instance.
+     *
+     * @param  \Closure  $closure
+     * @return void
+     */
+    public function __construct($closure)
+    {
+        $this->closure = $closure;
+    }
+
+    /**
+     * Resolve the closure with the given arguments.
+     *
+     * @return mixed
+     */
+    public function __invoke()
+    {
+        return call_user_func_array($this->closure, func_get_args());
+    }
+
+    /**
+     * Gets the closure.
+     *
+     * @return \Closure
+     */
+    public function getClosure()
+    {
+        return $this->closure;
+    }
+
+    /**
+     * Get the serializable representation of the closure.
+     *
+     * @return array
+     */
+    public function __serialize()
+    {
+        if (! static::$signer) {
+            throw new MissingSecretKeyException();
+        }
+
+        return static::$signer->sign(
+            serialize(new Native($this->closure))
+        );
+    }
+
+    /**
+     * Restore the closure after serialization.
+     *
+     * @param  array  $signature
+     * @return void
+     *
+     * @throws \Laravel\SerializableClosure\Exceptions\InvalidSignatureException
+     */
+    public function __unserialize($signature)
+    {
+        if (static::$signer && ! static::$signer->verify($signature)) {
+            throw new InvalidSignatureException();
+        }
+
+        $this->closure = unserialize($signature['serializable'])->getClosure();
+    }
+}