Struct VrfParameters

pub struct VrfParameters {
    pub V: CurvePoint,
    pub h: Scalar,
    pub s: Scalar,
}

Bundles values given to the smart contract to prove that a ticket is a win.

The VRF is thereby needed because it generates on-demand deterministic entropy that can only be derived by the ticket redeemer.

Fields

V: CurvePoint

the pseudo-random point

h: Scalar

s: Scalar

Implementations

impl VrfParameters

pub fn verify<const T: usize>( &self, creator: &Address, msg: &[u8; T], dst: &[u8], ) -> Result<()>

Verifies that VRF values are valid. The SC performs the verification. This method is here just to test correctness.

pub fn get_h_v_witness(&self) -> EncodedPoint

Performs a scalar point multiplication of self.h and self.v and returns the point in affine coordinates.

Used to create the witness values needed by the smart contract.

pub fn get_s_b_witness<const T: usize>( &self, creator: &Address, msg: &[u8; T], dst: &[u8], ) -> Result<EncodedPoint>

Performs a scalar point multiplication with the encoded payload and self.s. Expands the payload and applies the hash_to_curve algorithm.

Used to create the witness values needed by the smart contract.

Trait Implementations

impl BytesEncodable<VRF_PARAMETERS_SIZE> for VrfParameters

const SIZE: usize = N

Size of the encoded byte array. Defaults to N and should not be overridden.

fn into_encoded(self) -> [u8; N]

Convenience function to represent the A shorthand for let v: [u8; N] = self.into().

fn into_boxed(self) -> Box<[u8]>

Convenience function to encode the type into a Box.

impl Clone for VrfParameters

fn clone(&self) -> VrfParameters

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for VrfParameters

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

Formats the value using the given formatter.

impl Default for VrfParameters

fn default() -> VrfParameters

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for VrfParameters

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<VrfParameters> for [u8; 97]

fn from(value: VrfParameters) -> Self

Converts to this type from the input type.

impl Serialize for VrfParameters

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<&[u8]> for VrfParameters

type Error = GeneralError

The type returned in the event of a conversion error.

fn try_from(value: &[u8]) -> Result<Self, Self::Error>

Performs the conversion.