Struct Signer

pub struct Signer<D: Digest> { /* private fields */ }

Participant in the protocol can sign messages.

• If the signer has closed_reg, then it can generate Stm certificate.
  • This kind of signer can only be generated out of an Initializer and a ClosedKeyRegistration.
  • This ensures that a MerkleTree root is not computed before all participants have registered.
• If the signer does not have closed_reg, then it is a core signer.
  • This kind of signer cannot participate certificate generation.
  • Signature generated can be verified by a full node verifier (core verifier).

Implementations

impl<D: Clone + Digest + FixedOutput> Signer<D>

pub fn set_stm_signer( signer_index: u64, stake: Stake, params: Parameters, sk: BlsSigningKey, vk: VerificationKey, closed_reg: ClosedKeyRegistration<D>, ) -> Signer<D>

👎Deprecated since 0.5.0: Use set_signer instead

Create a Signer for given input

pub fn set_core_signer( signer_index: u64, stake: Stake, params: Parameters, sk: BlsSigningKey, vk: VerificationKey, ) -> Signer<D>

👎Deprecated since 0.5.0: Use set_basic_signer instead

Create a core signer (no registration data) for given input

pub fn sign(&self, msg: &[u8]) -> Option<SingleSignature>

This function produces a signature following the description of Section 2.4. Once the signature is produced, this function checks whether any index in [0,..,self.params.m] wins the lottery by evaluating the dense mapping. It records all the winning indexes in Self.indexes. If it wins at least one lottery, it stores the signer’s merkle tree index. The proof of membership will be handled by the aggregator.

pub fn get_verification_key(&self) -> VerificationKey

Extract the verification key.

pub fn verification_key(&self) -> VerificationKey

👎Deprecated since 0.5.0: Use get_verification_key instead

Extract the verification key.

pub fn get_stake(&self) -> Stake

Extract stake from the signer.

pub fn basic_sign( &self, msg: &[u8], total_stake: Stake, ) -> Option<SingleSignature>

A basic signature generated without closed key registration. The basic signature can be verified by basic verifier. Once the signature is produced, this function checks whether any index in [0,..,self.params.m] wins the lottery by evaluating the dense mapping. It records all the winning indexes in Self.indexes.

pub fn core_sign( &self, msg: &[u8], total_stake: Stake, ) -> Option<SingleSignature>

👎Deprecated since 0.5.0: Use basic_sign instead

A basic signature generated without closed key registration. The basic signature can be verified by basic verifier. Once the signature is produced, this function checks whether any index in [0,..,self.params.m] wins the lottery by evaluating the dense mapping. It records all the winning indexes in Self.indexes.

pub fn check_lottery( &self, msg: &[u8], sigma: &BlsSignature, total_stake: Stake, ) -> Vec<u64>

Collects and returns the winning indices.

pub fn get_params(&self) -> Parameters

👎Deprecated since 0.5.0: Use get_parameters instead

Get Parameters

pub fn get_closed_reg(&self) -> Option<ClosedKeyRegistration<D>>

👎Deprecated since 0.5.0: Use get_closed_key_registration instead

Get closed key registration

Trait Implementations

impl<D: Clone + Digest> Clone for Signer<D>

fn clone(&self) -> Signer<D>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<D: Debug + Digest> Debug for Signer<D>

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

Formats the value using the given formatter.