Trait WeierstrassPoint

pub trait WeierstrassPoint: Sized {
    type Coordinate: Field;

    const CURVE_B: Self::Coordinate;
    const IDENTITY: Self;

    // Required methods
    fn as_le_bytes(&self) -> &[u8] ;
    fn from_xy_unchecked(x: Self::Coordinate, y: Self::Coordinate) -> Self;
    fn into_coords(self) -> (Self::Coordinate, Self::Coordinate);
    fn x(&self) -> &Self::Coordinate;
    fn y(&self) -> &Self::Coordinate;
    fn x_mut(&mut self) -> &mut Self::Coordinate;
    fn y_mut(&mut self) -> &mut Self::Coordinate;
    fn add_ne_nonidentity(&self, p2: &Self) -> Self;
    fn add_ne_assign_nonidentity(&mut self, p2: &Self);
    fn sub_ne_nonidentity(&self, p2: &Self) -> Self;
    fn sub_ne_assign_nonidentity(&mut self, p2: &Self);
    fn double_nonidentity(&self) -> Self;
    fn double_assign_nonidentity(&mut self);

    // Provided methods
    fn from_xy(x: Self::Coordinate, y: Self::Coordinate) -> Option<Self>
       where for<'a> &'a Self::Coordinate: Mul<&'a Self::Coordinate, Output = Self::Coordinate> { ... }
    fn from_xy_nonidentity(
        x: Self::Coordinate,
        y: Self::Coordinate,
    ) -> Option<Self>
       where for<'a> &'a Self::Coordinate: Mul<&'a Self::Coordinate, Output = Self::Coordinate> { ... }
}

Short Weierstrass curve affine point.

Required Associated Constants

const CURVE_B: Self::Coordinate

The b coefficient in the Weierstrass curve equation y^2 = x^3 + a x + b.

const IDENTITY: Self

Required Associated Types

type Coordinate: Field

Required Methods

fn as_le_bytes(&self) -> &[u8]

The concatenated x, y coordinates of the affine point, where coordinates are in little endian.

Warning: The memory layout of Self is expected to pack x and y contigously with no unallocated space in between.

fn from_xy_unchecked(x: Self::Coordinate, y: Self::Coordinate) -> Self

Raw constructor without asserting point is on the curve.

fn into_coords(self) -> (Self::Coordinate, Self::Coordinate)

fn x(&self) -> &Self::Coordinate

fn y(&self) -> &Self::Coordinate

fn x_mut(&mut self) -> &mut Self::Coordinate

fn y_mut(&mut self) -> &mut Self::Coordinate

fn add_ne_nonidentity(&self, p2: &Self) -> Self

Hazmat: Assumes self != +- p2 and self != identity and p2 != identity.

fn add_ne_assign_nonidentity(&mut self, p2: &Self)

Hazmat: Assumes self != +- p2 and self != identity and p2 != identity.

fn sub_ne_nonidentity(&self, p2: &Self) -> Self

Hazmat: Assumes self != +- p2 and self != identity and p2 != identity.

fn sub_ne_assign_nonidentity(&mut self, p2: &Self)

Hazmat: Assumes self != +- p2 and self != identity and p2 != identity.

fn double_nonidentity(&self) -> Self

Hazmat: Assumes self != identity and 2 * self != identity.

fn double_assign_nonidentity(&mut self)

Hazmat: Assumes self != identity and 2 * self != identity.

Provided Methods

fn from_xy(x: Self::Coordinate, y: Self::Coordinate) -> Option<Self>

where for<'a> &'a Self::Coordinate: Mul<&'a Self::Coordinate, Output = Self::Coordinate>,

fn from_xy_nonidentity(x: Self::Coordinate, y: Self::Coordinate) -> Option<Self>

where for<'a> &'a Self::Coordinate: Mul<&'a Self::Coordinate, Output = Self::Coordinate>,

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl WeierstrassPoint for Secp256k1Point

const CURVE_B: Secp256k1Coord = CURVE_B

const IDENTITY: Self = _

type Coordinate = Secp256k1Coord