Referral plugin

I need help finding a plugin via which a person may be able to invite others, and they can register on my site using a referral code. Nobody can register without a referral code. Every user can see who they have invited in the form of a “referral tree”. The person who has invited receives a commission, each time the people under it make an order. The commission is to be determined only by user role. So the MANAGERS will always receive a $5 commission each time a purchase is carried out by the people they invited and OTHERS a $2 commission each time a person under them makes a purchase.

I have tried a few plugins myself but now am left empty handed as I can’t find the same functionality in any of them. Any help would be highly appreciated.

• This topic was modified 5 years ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic