"wrong" VAT calculation on Mollie API results in declined order

[mollie]

"wrong" VAT calculation on Mollie API results in declined order

[boxblinkracer]

Hi guys

thank you very much for this

so first of all,...we do only maintain the Shopware 5 plugin. the shopware 6 is done by another agency
that means the issue would belong here: https://github.com/mollie/Shopware6

still i have some (good) news for you
we had that also in one of our shopware 6 shops.

the problem is indeed more related to shopware as it seems. because values store the full float, so instead of 23.12 it has 23.120000005 stored in the DB. that means the overall sum could then differ...

mollie has indeed a validation for this....here you can find the formular: https://docs.mollie.com/reference/v2/orders-api/create-order
just search for totalAmount of formula

so the vertical and horizontal configuration has to match of course...which is...yeah...it is like it is...
but even if they are the same, it can still differ

a fix we did in a customer project was, to do a live calculation in the mollie shopware 6 plugin. so we dont use the pre calculated sums from the database, but calculate it live with correct rounding...its not perfect but it worked...

i hope this helps you in the meanwhile

cheers
christian

[boxblinkracer]

i told the mollie-shopware-6 guys about it and will close this ticket now here

feel free to contact us again if you need something :)