Struct frost_dalek::keygen::Participant

pub struct Participant {
    pub index: u32,
    pub commitments: Vec<RistrettoPoint>,
    pub proof_of_secret_key: NizkOfSecretKey,
}

A participant in a threshold signing.

Fields

index: u32

The index of this participant, to keep the participants in order.

commitments: Vec<RistrettoPoint>

A vector of Pedersen commitments to the coefficients of this participant's private polynomial.

proof_of_secret_key: NizkOfSecretKey

The zero-knowledge proof of knowledge of the secret key (a.k.a. the first coefficient in the private polynomial). It is constructed as a Schnorr signature using \( a_{i0} \) as the signing key.

Implementations

impl Participant

pub fn dealer(
    parameters: &Parameters
) -> (Vec<DealtParticipant>, VerifiableSecretSharingCommitment)

Have a trusted dealer generate all participants' key material and associated commitments for distribution to the participants.

Warning

Each participant MUST verify with all other n-1 participants that the VerifiableSecretSharingCommitment given to them by the dealer is identical. Otherwise, the participants' secret shares could be formed with respect to different polynomials and they will fail to create threshold signatures which validate.

pub fn new(parameters: &Parameters, index: u32) -> (Self, Coefficients)

Construct a new participant for the distributed key generation protocol.

Inputs

• The protocol instance Parameters, and
• This participant's index.

Usage

After a new participant is constructed, the participant.index, participant.commitments, and participant.proof_of_secret_key should be sent to every other participant in the protocol.

Returns

A distributed key generation protocol Participant and that participant's secret polynomial Coefficients which must be kept private.

pub fn public_key(&self) -> Option<&RistrettoPoint>

Retrieve \( \alpha_{i0} * B \), where \( B \) is the Ristretto basepoint.

This is used to pass into the final call to DistributedKeyGeneration::<RoundTwo>.finish().

Trait Implementations

impl Clone for Participant

pub fn clone(&self) -> Participant

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Participant

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

Formats the value using the given formatter.

impl PartialEq<Participant> for Participant

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use]pub fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl PartialOrd<Participant> for Participant

pub fn partial_cmp(&self, other: &Participant) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use]pub fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use]pub fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use]pub fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]pub fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.