RegisterService::checkRequiredFields

private function checkRequiredFields(MainRequest $request): MainResult
{
	$result = new MainResult();

	$requireFields = [
		'shopId',
		'sign',
		'key_1',
		'key_2',
		'signed_domain',
	];

	foreach ($requireFields as $field)
	{
		if (!$request->get($field))
		{
			$result->addError(new MainError("{$field} not found"));
		}
	}

	return $result;
}