Optionalauth_Optionalentry_Entry mode of the payment details.
Optionalinternal_Internal unique ID of the transaction on the SumUp platform.
Optionalmerchant_Unique code of the registered merchant to whom the payment is made.
Optionaltip_Amount of the tip (out of the total transaction amount).
Optionalvat_Amount of the applicable VAT (out of the total transaction amount).
Authorization code for the transaction sent by the payment card issuer or bank. Applicable only to card payments.