ClockInterface.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\API\Common\Time;

interface ClockInterface {
    public const NANOS_PER_SECOND = 1000000000;
    public const NANOS_PER_MILLISECOND = 1000000;
    public const NANOS_PER_MICROSECOND = 1000;
    
    /**
     * Returns the current epoch wall-clock timestamp in nanoseconds
     */
    public function now() : int;

}