pixelfed/app/Services/BouncerService.php

<?php

namespace App\Services;

use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Storage;
use Symfony\Component\HttpFoundation\IpUtils;

class BouncerService
{
	public static function checkIp($ip)
	{
		$knownCloudCidrs = Cache::rememberForever('pf:bouncer-service:check-ip:known-cloud-cidrs', function() {
			$file = Storage::get('bouncer/all.json');
			return json_decode($file, true);
		});

		return IpUtils::checkIp($ip, $knownCloudCidrs);
	}
}