Struct VrfParameters 

pub struct VrfParameters {
    pub V: AffinePoint,
    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: AffinePoint

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<(), CryptoError>

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

pub fn get_v_encoded_point( &self, ) -> EncodedPoint<<Secp256k1 as Curve>::FieldBytesSize>

Returns the encoded VRF V value as an uncompressed point in affine coordinates.

pub fn get_h_v_witness( &self, ) -> EncodedPoint<<Secp256k1 as Curve>::FieldBytesSize>

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<<Secp256k1 as Curve>::FieldBytesSize>, CryptoError>

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<hopr_crypto_types::::vrf::{impl#3}::{constant#0}> 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

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 duplicate 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<(), Error>

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<VrfParameters, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<VrfParameters> for [u8; 97]

fn from(value: VrfParameters) -> [u8; 97]

Converts to this type from the input type.

impl Serialize for VrfParameters

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::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<VrfParameters, <VrfParameters as TryFrom<&[u8]>>::Error>

Performs the conversion.

impl Copy for VrfParameters