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<?php

/**
 * This file is part of the ramsey/uuid library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
 * @license http://opensource.org/licenses/MIT MIT
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Generator;

use Ramsey\Uuid\Type\Hexadecimal;

/**
 * A time generator generates strings of binary data based on a node ID,
 * clock sequence, and the current time
 */
interface TimeGeneratorInterface
{
    /**
     * Generate a binary string from a node ID, clock sequence, and current time
     *
     * @param Hexadecimal|int|string|null $node A 48-bit number representing the
     *     hardware address; this number may be represented as an integer or a
     *     hexadecimal string
     * @param int|null $clockSeq A 14-bit number used to help avoid duplicates
     *     that could arise when the clock is set backwards in time or if the
     *     node ID changes
     *
     * @return string A binary string
     */
    public function generate($node = null, ?int $clockSeq = null): string;
}