Paymentwall fingerprint not getting generated

I was trying to integrate the paymentwall api in my laravel 5.1 application, unfortunately i am not getting the fingerprint that is generated through jquery. I tried passing 'browser_ip' = $_SERVER['REMOTE_ADDR'] and 'browser_domain' = $_SERVER['HTTP_HOST'] but its returning an error. I tried passing ip's other than $_SERVER['REMOTE_ADDR'] , that too didnt work. Any help would be appreciated.

regards,

via Chebli Mohamed