[FEATURE REQUEST] Refund should only be created with state 'refunded' when it was actually processed by Mollie

[Swahjak]

Describe the new feature

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Describe the solution to be implemented

Given the following recent issues #720 I was wondering if there could be situation where a refund would only reach the 'refunded' state when it is actually refunded. Magento does support having 3 states on a refund (open, refunded, closed) so from that perspective it should be possible. It seems like the Mollie Payment API also supports this out of the box, but the Orders API seems to be limited (based on the docs, haven't actually looked into it).

Why? Because when something goes wrong, we can visually confirm (but also grammatically) if a refund has been processed in Magento (or even received by Mollie).

Edit: A bit more context:

In Magento, a refund can go through a number of statuses; open, refunded, canceled. The bug from earlier exposed a vulnerability in which refunds (credit memos) were created but not actually refunded (read; not pushed to Mollie at all). By putting a refund in the status 'open' and not moving it to 'refunded' until the actual action is performed at Mollie, we as a company keep a grip on our refunds.

Backend changes
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Frontend changes
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Additional context
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[Frank-Magmodules]

HI There @Swahjak ,

Thank you for raising this matter.
Although we've had a direct conversation, I wanted to provide a clear summary of your question:

During the refund process, adhere to the following steps:

1. Create an “open” refund.
2. Send the actual refund to the Mollie platform.
3. Update the open refund to “refunded” as its final state.

Is my understanding right?
We will put this on our planning to see what’s possible here. Once we have an update we will get back to it.

[Swahjak]

Correct, and thereby providing a way to visually (but also programmatically) 'check' if a refund has been processed (without needing Mollie access).