Implementation EET about gopay-inline

[f3l1x]

@jakubsedlarik Hi, thank you for the ticket.

I don't need EET at this moment, but I think this library would support it. What changes do you think will be necessary?

[tchamra]

Hi, EET support would be very nice for me as well :)

I have investigated the API changes a bit and I have found 3 major changes:

1. Item list now contains tax rates (in percents)
2. There is now brand new EET object containing VAT info, including amounts for three VAT levels (corresponding to 21%, 15% and 10% rates)
3. In verification response there is new EET_CODE object containing FIK, BKP and PKP codes

If the EET object is not present but EET is activated for the account, the whole amount is automatically reported with 21% VAT.

Transactions normally contain all three (FIK, BKP, PKP) codes but when EET system fails, FIK can be omitted (this is not in API but I believe this is how EET works).

[jakubsedlarik]

@tchamra Thanks, this is exactly what is needed modify.

[jakubsedlarik]

Hi, I am just making theese enhancement. Tomorrow I'll prepare PR.

[haltuf]

Great! Looking forward to it.