Indicates whether one of the predefined tipping options is to let the shopper enter a custom tip. If **true**, only three of the other options defined in `predefinedTipEntries` are shown.
currency
string
The currency that the tipping settings apply to.
predefinedTipEntries
array
Tipping options the shopper can choose from if `usePredefinedTipEntries` is **true**. The maximum number of predefined options is four, or three plus the option to enter a custom tip. The options can
usePredefinedTipEntries
boolean
Indicates whether the terminal shows a prompt to enter a tip (**false**), or predefined tipping options to choose from (**true**).