Merge pull request #193 from mwarzybok-sumoheavy/feature/SP-352-master

SP-352 Java - DELETE /refunds/guid/:guid

Author: bobbrodie

src/main/java/com/bitpay/sdk/Client.java

@@ -897,6 +897,33 @@ public Refund cancelRefund(String refundId) throws RefundCancellationException,
         return refund;
     }
 
+    /**
+     * Cancel a previously submitted refund request on a BitPay invoice.
+     *
+     * @param guid The refund Guid for the refund to be canceled.
+     * @return An updated Refund Object.
+     * @throws RefundCancellationException RefundCancellationException class
+     * @throws BitPayException       BitPayException class
+     * @since 8.7.0
+     */
+    public Refund cancelRefundByGuid(String guid) throws RefundCancellationException, BitPayException {
+        Refund refund;
+
+        final List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>();
+        params.add(new BasicNameValuePair("token", this.getAccessToken(Facade.Merchant)));
+
+        try {
+            HttpResponse response = this.delete("refunds/guid/" + guid, params);
+            refund = new ObjectMapper().readValue(this.responseToJsonString(response), Refund.class);
+        } catch (BitPayException ex) {
+            throw new RefundCancellationException(ex.getStatusCode(), ex.getReasonPhrase());
+        } catch (Exception e) {
+            throw new RefundCancellationException(null, "failed to deserialize BitPay server response (Refund) : " + e.getMessage());
+        }
+
+        return refund;
+    }
+
     /**
      * Create a BitPay bill using the POS facade.
      *