Hi Drazen,
I’m sure its a good idea to follow Lily’s recommendation and contact support.
For anybody reading this in the hope to find a solution, I’d like to propose the following workaround for the time being:
Use an extension (or, if possible, a subscription) that is executed on every create or update order event and writes the high precision sum into a custom field.
Unfortunately, there is no custom field type for high precision money - there is once again only cent precision, so you’ll need to store it e.g. as a JSON String.
I believe there is potential in two easy-to-implement but valuable improvements in commercetools in your inquiry:
1. Add a custom type for high precision money
2. Add a “mode” to orders that will calculate the totalPrice in high precision money
Best regards,
Patrick