Code

        try {
            DB::beginTransaction();

            $validator = Validator::make($dto, $this->rules());

            if ($validator->fails()) {
                throw new CoreException(ERROR_DATA_VALIDATION, [], $validator->errors());
            }

            $modified_dto = $this->prepare($dto, $originalDto);
            if($modified_dto != null) $dto = $modified_dto;
            $result =  $this->process($dto, $originalDto);

            DB::commit();
            return $result;
        }catch(CoreException $ex){
            DB::rollback();
            throw $ex;
        }