<?php

namespace Firebase\JWT;

use InvalidArgumentException;
use OpenSSLAsymmetricKey;

> use OpenSSLCertificate;

> use TypeError;


class Key
{

<     /** @var string $algorithm */
<     private $algorithm;
< 
<     /** @var string|resource|OpenSSLAsymmetricKey $keyMaterial */



>     /** @var string|resource|OpenSSLAsymmetricKey|OpenSSLCertificate */


    private $keyMaterial;

>     /** @var string */

>     private $algorithm;


    /**

<      * @param string|resource|OpenSSLAsymmetricKey $keyMaterial



>      * @param string|resource|OpenSSLAsymmetricKey|OpenSSLCertificate $keyMaterial


     * @param string $algorithm
     */

<     public function __construct($keyMaterial, $algorithm)
<     {



>     public function __construct(
>         $keyMaterial,
>         string $algorithm
>     ) {


        if (

<             !is_string($keyMaterial)
<             && !is_resource($keyMaterial)



>             !\is_string($keyMaterial)


            && !$keyMaterial instanceof OpenSSLAsymmetricKey

>             && !$keyMaterial instanceof OpenSSLCertificate
        ) {
>             && !\is_resource($keyMaterial)



<             throw new InvalidArgumentException('Type error: $keyMaterial must be a string, resource, or OpenSSLAsymmetricKey');



>             throw new TypeError('Key material must be a string, resource, or OpenSSLAsymmetricKey');


        }

        if (empty($keyMaterial)) {

<             throw new InvalidArgumentException('Type error: $keyMaterial must not be empty');



>             throw new InvalidArgumentException('Key material must not be empty');


        }


<         if (!is_string($algorithm)|| empty($keyMaterial)) {
<             throw new InvalidArgumentException('Type error: $algorithm must be a string');



>         if (empty($algorithm)) {
>             throw new InvalidArgumentException('Algorithm must not be empty');


        }


>         // TODO: Remove in PHP 8.0 in favor of class constructor property promotion


        $this->keyMaterial = $keyMaterial;
        $this->algorithm = $algorithm;
    }

    /**
     * Return the algorithm valid for this key
     *
     * @return string
     */

<     public function getAlgorithm()



>     public function getAlgorithm(): string


    {
        return $this->algorithm;
    }

    /**

<      * @return string|resource|OpenSSLAsymmetricKey



>      * @return string|resource|OpenSSLAsymmetricKey|OpenSSLCertificate


     */
    public function getKeyMaterial()
    {
        return $this->keyMaterial;
    }
}