Placeholder issue: verify voided Affirm payments are not able to complete the order

[peterberkenbosch]

this might be a Solidus core related issue / feature, but with the fix of #32 I also think this is solved as well.

todo: verifying this while developing the updated checkout flow for Affirm

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.