eWAY is a payment gateway based in Australia http://www.eway.com.au/ providing ecommerce credit card services. Smith Cart is integrated with the eWAY Merchant Hosted Payment solution. Smith Cart posts an XML document containing customer and payment information to the eWAY payment gateway. This allows customers' to remain on your website at all times, while processing occurs behind the scenes.
In the Smith Cart BuyNow module settings enter the following information under the “Gateway” section for eWay:
Customer ID - This is a required field for the eWAY gateway. CustomerID is a unique id that identifies you with the eWAY gateway provider.