ExponentialBackoffTrait.php

<?php

namespace App\Jobs\Traits;

trait ExponentialBackoffTrait
{
    /**
     * @return \Carbon\Carbon
     * @link https://medium.com/maatwebsite/laravel-and-murphys-law-e22731be31d9
     */
    public function retryAfter()
    {
        return now()->addSeconds(
            (int) round(((2 ** $this->attempts()) - 1 ) / 2)
        );
    }
}