The gross amount the fee was computed on, as a decimal string (echoes the request).
Currency/asset code of FeePreview.amount, e.g. "USDT".
Total fee charged on the amount, as a decimal string.
Amount that nets out after the fee (amount - fee), as a decimal string.
Which payment type this preview priced — see PaymentType.
A fee quote for a prospective payment. FeePreview.fee is the total charged on the amount.