Enum FastTransferFee 

#[non_exhaustive]
pub enum FastTransferFee {
    Known(u32),
    Unknown,
}

Static Fast Transfer fee metadata for a CCTP v2 chain, in basis points.

This enum is retained for chain-level/static metadata. Current CCTP v2 fees are route-aware and should be fetched with CctpV2Bridge::get_transfer_fees or CctpV2Bridge::calculate_fast_transfer_max_fee before quoting or sending a Fast Transfer. Until a chain’s static fee has been confirmed against an authoritative source, this SDK represents it as FastTransferFee::Unknown rather than asserting a numeric value.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Known(u32)

Fee is confirmed at this value in basis points (0-14).

A Known(0) is a sourced zero fee, semantically distinct from FastTransferFee::Unknown.

Unknown

Fee data has not yet been confirmed for this chain.

Callers must not assume zero. Coercing Unknown to zero would reintroduce the placeholder behavior this enum exists to prevent — Circle’s published range is 0-14 bps, so a default of zero is plausible enough to mask a real fee from downstream consumers.

Trait Implementations

impl Clone for FastTransferFee

fn clone(&self) -> FastTransferFee

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FastTransferFee

impl Debug for FastTransferFee

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

Formats the value using the given formatter.

impl Eq for FastTransferFee

impl PartialEq for FastTransferFee

fn eq(&self, other: &FastTransferFee) -> 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 StructuralPartialEq for FastTransferFee