<?php

declare(strict_types=1);

namespace SimpleSAML\Store;

/**

* An interface describing data stores.

*

* @package simplesamlphp/simplesamlphp

*/

interface StoreInterface

{

/**

* Retrieve a value from the data store.

*

* @param string $type The data type.

* @param string $key The key.

*

* @return mixed|null The value.

*/

public function get(string $type, string $key): mixed;

/**

* Save a value to the data store.

*

* @param string $type The data type.

* @param string $key The key.

* @param mixed $value The value.

* @param int|null $expire The expiration time (unix timestamp), or null if it never expires.

*/

public function set(string $type, string $key, mixed $value, ?int $expire = null): void;

/**

* Delete a value from the data store.

*

* @param string $type The data type.

* @param string $key The key.

*/

public function delete(string $type, string $key): void;

}