Struct Commitment 

pub struct Commitment { /* private fields */ }

A commitment to a univariate polynomial.

A commitment allows verification of polynomial evaluations without revealing the polynomial itself. Given a commitment to polynomial f, anyone can verify that a claimed value y equals f(x) for a given x, without learning f.

Example

use threshold_pairing::poly::Poly;

let mut rng = rand::thread_rng();
let poly = Poly::random(2, &mut rng);
let commitment = poly.commitment();

// The commitment can verify polynomial evaluations
// (in the group, not the field directly)
let x = 5u64;
let y_in_group = commitment.evaluate(x);

// The degree matches the polynomial
assert_eq!(poly.degree(), commitment.degree());

Implementations

impl Commitment

pub fn degree(&self) -> usize

Returns the polynomial’s degree.

Returns 0 for an empty commitment (zero polynomial).

pub fn evaluate<T: IntoScalar>(&self, i: T) -> G1Projective

Returns the i-th public key share.

Trait Implementations

impl<B: Borrow<Commitment>> Add<B> for &Commitment

type Output = Commitment

The resulting type after applying the + operator.

fn add(self, rhs: B) -> Commitment

Performs the + operation.

impl<B: Borrow<Commitment>> Add<B> for Commitment

type Output = Commitment

The resulting type after applying the + operator.

fn add(self, rhs: B) -> Commitment

Performs the + operation.

impl<B: Borrow<Commitment>> AddAssign<B> for Commitment

fn add_assign(&mut self, rhs: B)

Performs the += operation.

impl Clone for Commitment

fn clone(&self) -> Commitment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Commitment

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Commitment

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Commitment> for PublicKeySet

fn from(commit: Commitment) -> PublicKeySet

Converts to this type from the input type.

impl Hash for Commitment

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Commitment

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Commitment

fn eq(&self, other: &Commitment) -> 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 PartialOrd for Commitment

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

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

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

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

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

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

impl Serialize for Commitment

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Commitment

impl StructuralPartialEq for Commitment