Need a referral system plugin for my new website

Hi,
I want to launch my new website using wordpress.
I am new to wordpress so need some help.
my idea is to build a landing page with signup option, each user that get signup will get a unique referral link that he can share to get referral to my website and I can send them gifts on the basis of referrals.
I am wondering if there is a plugin of that kind, or I have to develop this from scratch.

thanks