Struct AuxInfoBuilder 

pub struct AuxInfoBuilder<'a, L, D = Sha256>
where
    L: SecurityLevel,
    D: Digest,
{ /* private fields */ }

Entry point for key refresh and auxiliary info generation.

Implementations

impl<'a, L, D> AuxInfoBuilder<'a, L, D>

where L: SecurityLevel, D: Digest,

pub fn new_aux_gen( eid: ExecutionId<'a>, i: u16, n: u16, pregenerated: PregeneratedPrimes<L>, ) -> Self

Build key aux info generation operation. Start it with start.

PregeneratedPrimes can be obtained with PregeneratedPrimes::generate

pub async fn start<R, M>( self, rng: &mut R, party: M, ) -> Result<AuxInfo<L>, KeyRefreshError>

where R: RngCore + CryptoRng, M: Mpc<ProtocolMessage = Msg<D, L>>, L: SecurityLevel, D: Digest + Clone + 'static,

Carry out the aux info generation procedure. Takes a lot of time

pub fn into_state_machine<R>( self, rng: &'a mut R, ) -> impl StateMachine<Output = Result<AuxInfo<L>, KeyRefreshError>, Msg = Msg<D, L>> + 'a

where R: RngCore + CryptoRng, L: SecurityLevel, D: Digest<OutputSize = U32> + Clone + 'static,

Available on crate feature state-machine only.

Returns a state machine that can be used to carry out the aux info generation protocol

See [round_based::state_machine] for details on how that can be done.

impl<'a, L, D> AuxInfoBuilder<'a, L, D>

where L: SecurityLevel, D: Digest,

pub fn set_digest<D2: Digest>(self) -> AuxInfoBuilder<'a, L, D2>

Specifies another hash function to use

pub fn set_progress_tracer(self, tracer: &'a mut dyn Tracer) -> Self

Sets a tracer that tracks progress of protocol execution

pub fn enforce_reliable_broadcast(self, v: bool) -> Self

Ensures reliability of broadcast channel by adding one extra communication round

CGGMP24 protocol requires message in the first round to be sent over reliable broadcast channel. We ensure reliability of the broadcast channel by introducing extra communication round (at cost of additional latency). You may disable it, for instance, if your transport layer is reliable by construction (e.g. you use blockchain for communications).

Default: true.

pub fn precompute_multiexp_tables(self, v: bool) -> Self

Precomputes multiexponentiation tables for output aux data

Enables optimization that makes signing and presigning faster. Precomputation takes a while and makes protocol a bit longer. It noticebly increases size of aux data both in RAM and on disk (after serialization).