How to integrate ccavenue payment gateway in laravel frame work?

I have Larvel 5.1 and composer version 1.2.0 and it setup on ubuntu 14,04 . I struck in step 4(Publish the config & Middleware by running in your terminal) and displays error message like "FatalErrorException in ProviderRepository.php line 146: Class 'Softon\Indipay\IndipayServiceProvider' not found". Please help to solve this.

via Chebli Mohamed