Is there a Square Payment Add-on?

So I was looking at using WooCommerce to then tie into Simple Membership however it looks like it would be easier for me to do the member registration fees through Simple Membership Plugin. Am I correct or is there an add-on for WooCommerce to tie into Simple Membership? It would need to be able to tie the transactions from WooCommerce to the user’s account. If not would is there a Square Payment Add-on for the Plugin? At Conventions I swipe cards via Square to make transactions simple, so I need some way to tie in the Square payments to the members account, to give them the membership level that they are. So Web admin would need to some how be able to tie Square payments from the Swipe POS on the iPad to the member’s account. Any advice would be much appreciated! Its a non profit organization so the membership levels don’t mean much other than that they are paying the correct donation fee for their position in the organization. Essentially I will be creating user accounts for them before hand and assigning them a membership level which then only allows them to purchase the correct $ amount.