Struct Point 

pub struct Point { /* private fields */ }

A point on the sect283k1 elliptic curve

Implementations

impl Point

pub fn new_uncompressed(x: &[u8; 36], y: &[u8; 36]) -> Result<Self>

Create a new point from uncompressed coordinates.

Returns an error if the coordinates don’t satisfy the curve equation y² + xy = x³ + 1.

pub fn identity() -> Self

Create the identity point (point at infinity).

pub fn is_identity(&self) -> bool

Check if this point is the identity element.

pub fn x_coordinate_bytes(&self) -> [u8; 36]

Get the x-coordinate of this point as bytes.

pub fn y_coordinate_bytes(&self) -> [u8; 36]

Get the y-coordinate of this point as bytes.

pub fn serialize_compressed(&self) -> [u8; 37]

Serialize this point in compressed format.

The compressed format uses the trace to disambiguate the y-coordinate.

pub fn deserialize_compressed(bytes: &[u8]) -> Result<Self>

Deserialize a point from compressed format.

Recovers the y-coordinate from the x-coordinate and the compression flag. Returns an error if the bytes don’t represent a valid point.

pub fn add(&self, other: &Self) -> Self

Constant-time Affine addition. Computes both addition and doubling paths and selects valid one. Handles division-by-zero safely via dummy inversion.

pub fn double(&self) -> Self

Constant-time Affine doubling. Computes doubling formula safely, handling the P at infinity case without branching.

pub fn mul(&self, scalar: &Scalar) -> Result<Self>

Scalar multiplication: compute scalar * self.

Uses constant-time double-and-add algorithm.

Trait Implementations

impl Clone for Point

fn clone(&self) -> Point

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ConditionallySelectable for Point

fn conditional_select(a: &Self, b: &Self, choice: Choice) -> Self

Select a or b according to choice.

fn conditional_assign(&mut self, other: &Self, choice: Choice)

Conditionally assign other to self, according to choice.

fn conditional_swap(a: &mut Self, b: &mut Self, choice: Choice)

Conditionally swap self and other if choice == 1; otherwise, reassign both unto themselves.

impl Debug for Point

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

Formats the value using the given formatter.

impl PartialEq for Point

fn eq(&self, other: &Self) -> 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 Copy for Point

impl Eq for Point