#261 clarify meaning of transactionRef and add transactionId as a standard parameter

Author: eileenmcnaughton

src/Omnipay/Common/Message/AbstractRequest.php

@@ -455,6 +455,8 @@ public function setDescription($value)
     /**
      * Get the transaction ID.
      *
+     * The transaction ID is the identifier generated by the originating website.
+     *
      * @return string
      */
     public function getTransactionId()
@@ -476,6 +478,8 @@ public function setTransactionId($value)
     /**
      * Get the transaction reference.
      *
+     * The transaction reference is the identified generated by the payment gateway.
+     *
      * @return string
      */
     public function getTransactionReference()

src/Omnipay/Common/Message/AbstractResponse.php

@@ -37,7 +37,7 @@ abstract class AbstractResponse implements ResponseInterface
      * @var RequestInterface
      */
     protected $request;
-    
+
     /**
      * The data contained in the response.
      *
@@ -144,7 +144,17 @@ public function getCode()
      */
     public function getTransactionReference()
     {
-        return null;
+        return $this->getParameter('transactionReference');
+    }
+
+    /**
+     * Get the transaction ID as generated by originating website.
+     *
+     * @return string
+     */
+    public function getTransactionId()
+    {
+        $this->getParameter('transactionId');
     }
 
     /**