SOme clarification comments.

composer.json

@@ -19,6 +19,10 @@
             "name": "Adrian Macneil",
             "email": "[email protected]"
         },
+        {
+            "name": "Jason Judge",
+            "email": "[email protected]"
+        },
         {
             "name": "Omnipay Contributors",
             "homepage": "https://github.com/thephpleague/omnipay-sagepay/contributors"

src/Message/Form/CompleteAuthorizeRequest.php

@@ -33,7 +33,7 @@ public function getTxType()
     public function getData()
     {
         // The application has the option of passing the query parameter
-        // in, perhaps using its own middleware, or allowing Omnipay t0
+        // in, perhaps using its own middleware, or allowing Omnipay to
         // provide it.
 
         $crypt = $this->getCrypt() ?: $this->httpRequest->query->get('crypt');
@@ -45,7 +45,7 @@ public function getData()
         }
 
         // Remove the leading '@' and decrypt the remainder into a query string.
-        // And E_WARNING error will be issued if the crypt parameter data is not
+        // An InvalidResponseException is thrown if the crypt parameter data is not
         // a hexadecimal string.
 
         $hexString = substr($crypt, 1);
@@ -64,6 +64,9 @@ public function getData()
 
         parse_str($queryString, $data);
 
+        // The result will be ASCII data only, being a very restricted set of
+        // IDs and flags, so can be treated as UTF-8 without any conversion.
+
         return($data);
     }