Description
As per the notes for both v2 and v3, SagePay only ever seems to return one of three states: STATUS_COMPLETED, STATUS_PENDING or, and the default, STATUS_FAILED.
We have an integration problem, where we are using the authorize() function and this always sends a DEFERRED payment. In some cases payments should/could be AUTHENTICATE. However, using the authorize() callback we're only ever going to get DEFERRED. A setTxType() would be ideal in side DirectGateway. Which, if using Authorize, you could override the default action.
Similarly, when payments are returned acceptNotification() will only ever return one of three states: STATUS_COMPLETED, STATUS_PENDING or, and the default, STATUS_FAILED. This was already raised here: #42
Therefore, each successful transaction that returns an AUTHENTICATED state technically fails, even though its not failed. My understanding of "$gateway->capture([...]);" is that it will release the funds immediately and stops using the acceptNotification(), which has been advised in issue #69.