Struct TransferFeeConfig 

pub struct TransferFeeConfig {
    pub older: TransferFeeRate,
    pub newer: TransferFeeRate,
}

Two-rate fee schedule.

Fields

older: TransferFeeRate

newer: TransferFeeRate

Implementations

impl TransferFeeConfig

pub fn rate_for_epoch(&self, current_epoch: u64) -> &TransferFeeRate

Pick the rate that will be applied at current_epoch.

Token-2022 activates newer once current_epoch >= newer.epoch, otherwise it keeps using older.

pub fn calculate_fee( &self, amount: u64, current_epoch: u64, ) -> Result<u64, CoreError>

Fee that the Token-2022 program will withhold when transferring amount raw units of this mint at current_epoch.

pub fn calculate_pre_fee_amount( &self, post_fee_amount: u64, current_epoch: u64, ) -> Result<Option<u64>, CoreError>

Inverse of [calculate_fee]: given the net amount the recipient should observe, return the smallest gross amount that, after fee deduction, yields at least post_fee_amount.

Returns None only when no finite gross amount can deliver the requested net without overflowing u64.

Trait Implementations

impl Clone for TransferFeeConfig

fn clone(&self) -> TransferFeeConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TransferFeeConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for TransferFeeConfig

fn eq(&self, other: &TransferFeeConfig) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for TransferFeeConfig

impl Eq for TransferFeeConfig

impl StructuralPartialEq for TransferFeeConfig