# File lib/active_merchant/billing/gateways/protx.rb, line 60
      def purchase(money, credit_card, options = {})
        requires!(options, :order_id)
        
        post = {}
        
        add_amount(post, money, options)
        add_invoice(post, options)
        add_credit_card(post, credit_card)
        add_address(post, options)
        add_customer_data(post, options)

        commit(:purchase, post)
      end