# File lib/active_merchant/billing/integrations/gestpay/helper.rb, line 59
          def encryption_query_string
            fields = ['PAY1_AMOUNT', 'PAY1_SHOPTRANSACTIONID', 'PAY1_UICCODE']
          
            encoded_params = fields.collect{ |field| "#{field}=#{CGI.escape(@fields[field])}" }.join(DELIMITER)
          
            "#{ENCRYPTION_PATH}?a=" + CGI.escape(@fields['ShopLogin']) + "&b=" + encoded_params + "&c=" + CGI.escape(VERSION)
          end