Add interface for Config\Keys.

Author: Potherca

src/Config/Keys.php

@@ -6,7 +6,7 @@
 use Lcobucci\JWT\Signer\Key\InMemory as Key;
 use League\OAuth2\Server\CryptKey;
 
-class Keys
+class Keys implements KeysInterface
 {
     ////////////////////////////// CLASS PROPERTIES \\\\\\\\\\\\\\\\\\\\\\\\\\\\
 

src/Config/KeysInterface.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Pdsinterop\Solid\Auth\Config;
+
+use Defuse\Crypto\Key as CryptoKey;
+use Lcobucci\JWT\Signer\Key\InMemory as Key;
+use League\OAuth2\Server\CryptKey;
+
+interface KeysInterface
+{
+    public function getEncryptionKey(): CryptoKey|string;
+
+    public function getPrivateKey(): CryptKey;
+
+    public function getPublicKey(): Key;
+
+    public function __construct(CryptKey $privateKey, Key $publicKey, CryptoKey|string $encryptionKey);
+}