Struct VssCommitment 

pub struct VssCommitment {
    pub commitments: Vec<AffinePoint>,
}

Public commitments from a Feldman VSS deal.

C_0 = g^{a_0} is the joint public key. The remaining commitments C_1...C_{T-1} allow shareholders to verify their shares.

Fields

commitments: Vec<AffinePoint>

Commitment to each polynomial coefficient: C_i = g^{a_i}.

Implementations

impl VssCommitment

pub fn new(commitments: Vec<AffinePoint>) -> Self

Create a new VSS commitment from coefficient commitments.

pub fn threshold(&self) -> usize

The threshold T (number of shares needed to reconstruct).

pub fn joint_public_key(&self) -> AffinePoint

The joint public key: C_0 = g^{secret}.

pub fn verify_share(&self, party_idx_1based: u64, share: Scalar) -> bool

Verify that a share (party_idx, share) is consistent with the committed polynomial.

Checks: g^{share} == product_i(C_i^{party_idx^i})

pub fn encode(&self) -> Vec<u8>

Encode commitments as concatenated SEC1 compressed points.

pub fn decode(bytes: &[u8]) -> Option<Self>

Decode commitments from concatenated SEC1 compressed points. Each point is 33 bytes. Returns None if any point is invalid.

Trait Implementations

impl Clone for VssCommitment

fn clone(&self) -> VssCommitment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VssCommitment

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

Formats the value using the given formatter.