Struct ResumptionHint 

#[non_exhaustive]
pub struct ResumptionHint {
    pub session_id: Vec<u8>,
    pub resumption_secret: Vec<u8>,
}

0-RTT resumption material extracted from a completed session.

Produced by PhantomSession::resumption_hint after a handshake completes, and fed back into connect_pinned_with_resumption to attempt a 0-RTT reconnect to the same server.

Both fields are exactly 32 bytes — this record is the UniFFI-representable surface for the internal (session_id, resumption_secret) tuple. The fields are Vec<u8> because UniFFI has no fixed-size-array type, so the length is a runtime invariant checked when the hint is used.

Store the hint alongside the pinned HybridVerifyingKey of the server it was negotiated against: the resumption_secret is server-pinned, and reusing a hint across servers is a configuration bug.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

session_id: Vec<u8>

The negotiated session id (32 bytes).

resumption_secret: Vec<u8>

The resumption secret (32 bytes) — sensitive; treat like a key.

Trait Implementations

impl Clone for ResumptionHint

fn clone(&self) -> ResumptionHint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<UT> ConvertError<UT> for ResumptionHint

fn try_convert_unexpected_callback_error( e: UnexpectedUniFFICallbackError, ) -> Result<Self>

impl Debug for ResumptionHint

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

Formats the value using the given formatter.

impl<UT> FfiConverter<UT> for ResumptionHint

const TYPE_ID_META: MetadataBuffer

Type ID metadata, serialized into a MetadataBuffer.

type FfiType = RustBuffer

The low-level type used for passing values of this type over the FFI.

fn lower(v: Self) -> RustBuffer

Lower a rust value of the target type, into an FFI value of type Self::FfiType.

fn try_lift(buf: RustBuffer) -> Result<Self>

Lift a rust value of the target type, from an FFI value of type Self::FfiType.

fn write(obj: Self, buf: &mut Vec<u8>)

Write a rust value into a buffer, to send over the FFI in serialized form.

fn try_read(buf: &mut &[u8]) -> Result<Self>

Read a rust value from a buffer, received over the FFI in serialized form.

impl<UT> Lift<UT> for ResumptionHint

type FfiType = <ResumptionHint as FfiConverter<UT>>::FfiType

fn try_lift(v: Self::FfiType) -> Result<Self>

fn try_read(buf: &mut &[u8]) -> Result<Self>

fn try_lift_from_rust_buffer(v: RustBuffer) -> Result<Self, Error>

Convenience method

impl<UT> LiftRef<UT> for ResumptionHint

type LiftType = ResumptionHint

impl<UT> LiftReturn<UT> for ResumptionHint

type ReturnType = <ResumptionHint as Lift<UT>>::FfiType

FFI return type for trait interfaces

fn try_lift_successful_return(v: Self::ReturnType) -> Result<Self>

Lift a successfully returned value from a trait interface

fn lift_foreign_return( ffi_return: Self::ReturnType, call_status: RustCallStatus, ) -> Self

Lift a foreign returned value from a trait interface

fn lift_error(_buf: RustBuffer) -> Self

Lift a Rust value for a callback interface method error result

fn handle_callback_unexpected_error(e: UnexpectedUniFFICallbackError) -> Self

Lift a Rust value for an unexpected callback interface error

impl<UT> Lower<UT> for ResumptionHint

type FfiType = <ResumptionHint as FfiConverter<UT>>::FfiType

fn lower(obj: Self) -> Self::FfiType

fn write(obj: Self, buf: &mut Vec<u8>)

fn lower_into_rust_buffer(obj: Self) -> RustBuffer

Convenience method

impl<UT> LowerError<UT> for ResumptionHint

fn lower_error(obj: Self) -> RustBuffer

Lower this value for scaffolding function return

impl<UT> LowerReturn<UT> for ResumptionHint

type ReturnType = <ResumptionHint as Lower<UT>>::FfiType

The type that should be returned by scaffolding functions for this type.

fn lower_return(v: Self) -> Result<Self::ReturnType, RustCallError>

Lower the return value from an scaffolding call

fn handle_failed_lift( error: LiftArgsError, ) -> Result<Self::ReturnType, RustCallError>

Lower the return value for failed argument lifts

impl<UT> TypeId<UT> for ResumptionHint

const TYPE_ID_META: MetadataBuffer