DonationAdditionalAmountBuilder

Donation is an additional amount which is included in Payment and CardAcquisition.

One of the key aspect - it should be included into final amount: val donationAmount = 10 val initialAmount = 20 then finalAmount you should provide in request should be val finalAmount = PaymentAmounts(amount = donationAmount + initialAmount); while additionalAmount value is still should be included into request:

PaymentRequest(
 paymentAmounts = PaymentAmounts(
  amount = 30,
  currency = "EUR"
 ),
 additionalAmounts = listOf(
  DonationAdditionalAmountBuilder.createDonationAmount(
   amount = 10
  )
 )
)