Alternatively, could the Tera Wallet Credit add-on be attached to a wooCommerce product? If user buys the product (for example a gift card), he is sent a unique voucher code to top up his wallet. Then a product payment of 100 could give a 105 credit voucher. Only works though, if the voucher code can be automatically attached to the product (no manual input from admin, though admin could upload a list of codes to be used) and is unique, one time use only.
