Banklink implementation sets VK_REF and VK_MSG even if LtSwedbank specification allows only one of the fields to be used about banklink

[renekorss]

Thanks for reporting. I will take a look into this. Since I'm quite busy right now, it could take me some time. Probably this week.

[renekorss]

It will take some more time. I have solution ready in my head if I get free time.

[zexa]

I tried to overwrite both VK_REF and VK_MSG via $customRequestData inside getPaymentRequest from RKD\Banklink\Banklink , however that causes an UnexpectedValueException that says

Field VK_MSG must be set to use service 1002.

[zexa]

Any updates? Let me know if there's something I can help with.

[renekorss]

I researched this a bit and to my understanding setting VK_MSG to empty string ('') is actually what's needed. This is because it still needs to be in VK_MAC. At least what I can see from examples from documentation. I found english version here: https://www.swedbank.lt/files/Banklink_TC_en.pdf

Using empty string won't throw UnexpectedValueException since it is set, is not false and is not null. Have you tried this? If not, please do and let me know.

[zexa]

Hi, apologies for the delayed response.

All I get is an invalid VK_MAC if I leave VK_MSG empty. I haven't taken the time to debug the generated VK_MAC before encoding it but my guess would be that leaving VK_MSG generates a 000 signature string.

[renekorss]

From this document, 000 is exactly what it should generate. View start of last page.

[renekorss]

All I get is an invalid VK_MAC if I leave VK_MSG empty

Is bank replying with message that VK_MAC is invalid?

[zexa]

Is bank replying with message that VK_MAC is invalid?

Yep.

[renekorss]

Is there any test environment I could test on?

[zexa]

The project I'm currently working on is not yet publicly available and even if it was you'd need to meet special conditions in order to get an account in it.

Long story short I don't think I can give you access to a testing environment. I'd have to consult with my employer and I don't think he'd be too happy with the idea.

Perhaps if you told me what you're looking for I could do the experiments for you?

[renekorss]

Completely understand. Does bank have test environment I could play with?

[zexa]

From what I see in https://www.swedbank.lt/business/cash/banklink/paymentPortal Swedbank does not have a sandbox.

[zexa]

I suppose I could look into opening an account for a personal project.

[renekorss]

For debuging, please uncomment this line

Banklink/src/Protocol/IPizza/Services2015.php

Line 101 in 2a95015

'VK_REF',

and try to overwrite VK_REF in data by setting it to null.
Let's see of it then passes.