In <createTransactionResponse> I receive a resultCode field and below that, a code in the format "I00001" (for successful request).
e.g.
<messages>
<resultCode>Ok</resultCode>
<message>
<code>I00001</code>
<text>Successful.</text>
</message>
</messages>
But for certian errors it's different. For example the duplicate transaction error is "E00027", but it doesn't seem to be documented anywhere whether or not there are any other error codes. Does this documentation exist anywhere?
