Fulfill Purchase

To implement the fulfill purchase API using the SDK, implement one abstract method from the PurchaseServlet class: fulfillPurchase.

 /**
* Process the fulfill purchase request and return the response to whether or not the
* request succeeded.
 *
 * @param request
 * the request relative to the fulfill purchase
 *
 * @return a FulfillPurchaseResponse object
 */
 public abstract FulfillPurchaseResponse fulfillPurchase(FulfillPurchaseRequest
request);