total_amount property
Total price in the smallest units of the currency
(integer, not float/double). For example, for a price of US$ 1.45
pass amount = 145. See the exp parameter in currencies.json,
it shows the number of digits past the decimal point for each
currency (2 for the majority of currencies).
Implementation
@JsonKey(name: 'total_amount', required: true)
int? total_amount;