Trait SignatureKey 

pub trait SignatureKey:
    Send
    + Sync
    + Clone
    + Sized
    + Debug
    + Hash
    + Serialize
    + for<'a> Deserialize<'a>
    + PartialEq
    + Eq
    + PartialOrd
    + Ord
    + Display
    + ToFieldsLightClientCompat
    + for<'a> TryFrom<&'a TaggedBase64>
    + Into<TaggedBase64> {
    type PrivateKey: PrivateSignatureKey;
    type StakeTableEntry: StakeTableEntryType<Self> + Send + Sync + Sized + Clone + Debug + Hash + Eq + Serialize + for<'a> Deserialize<'a>;
    type VerificationKeyType: Debug + Hash + Clone + Send + Sync + for<'a> Deserialize<'a> + Serialize + PartialEq + Eq;
    type QcParams<'a>: Send + Sync + Sized + Clone + Debug + Hash;
    type PureAssembledSignatureType: Send + Sync + Sized + Clone + Debug + Hash + PartialEq + Eq + Serialize + for<'a> Deserialize<'a> + Into<TaggedBase64> + for<'a> TryFrom<&'a TaggedBase64>;
    type QcType: Send + Sync + Sized + Clone + Debug + Hash + PartialEq + Eq + Serialize + for<'a> Deserialize<'a>;
    type SignError: Error + Send + Sync;

    // Required methods
    fn validate(
        &self,
        signature: &Self::PureAssembledSignatureType,
        data: &[u8],
    ) -> bool;
    fn sign(
        private_key: &Self::PrivateKey,
        data: &[u8],
    ) -> Result<Self::PureAssembledSignatureType, Self::SignError>;
    fn from_private(private_key: &Self::PrivateKey) -> Self;
    fn to_bytes(&self) -> Vec<u8> ;
    fn from_bytes(bytes: &[u8]) -> Result<Self, SerializationError>;
    fn generated_from_seed_indexed(
        seed: [u8; 32],
        index: u64,
    ) -> (Self, Self::PrivateKey);
    fn stake_table_entry(&self, stake: U256) -> Self::StakeTableEntry;
    fn public_key(entry: &Self::StakeTableEntry) -> Self;
    fn public_parameter(
        stake_entries: &[Self::StakeTableEntry],
        threshold: U256,
    ) -> Self::QcParams<'_>;
    fn check(
        real_qc_pp: &Self::QcParams<'_>,
        data: &[u8],
        qc: &Self::QcType,
    ) -> Result<(), SignatureError>;
    fn signers(
        real_qc_pp: &Self::QcParams<'_>,
        qc: &Self::QcType,
    ) -> Result<Vec<Self::VerificationKeyType>, SignatureError>;
    fn sig_proof(
        signature: &Self::QcType,
    ) -> (Self::PureAssembledSignatureType, BitVec);
    fn assemble(
        real_qc_pp: &Self::QcParams<'_>,
        signers: &BitSlice,
        sigs: &[Self::PureAssembledSignatureType],
    ) -> Self::QcType;
    fn genesis_proposer_pk() -> Self;
    fn to_verification_key(&self) -> Self::VerificationKeyType;
}

Trait for abstracting public key signatures Self is the public key type

Required Associated Types

type PrivateKey: PrivateSignatureKey

The private key type for this signature algorithm

type StakeTableEntry: StakeTableEntryType<Self> + Send + Sync + Sized + Clone + Debug + Hash + Eq + Serialize + for<'a> Deserialize<'a>

The type of the entry that contain both public key and stake value

type VerificationKeyType: Debug + Hash + Clone + Send + Sync + for<'a> Deserialize<'a> + Serialize + PartialEq + Eq

The verification key type

type QcParams<'a>: Send + Sync + Sized + Clone + Debug + Hash

The type of the quorum certificate parameters used for assembled signature

type PureAssembledSignatureType: Send + Sync + Sized + Clone + Debug + Hash + PartialEq + Eq + Serialize + for<'a> Deserialize<'a> + Into<TaggedBase64> + for<'a> TryFrom<&'a TaggedBase64>

The type of the assembled signature, without BitVec

type QcType: Send + Sync + Sized + Clone + Debug + Hash + PartialEq + Eq + Serialize + for<'a> Deserialize<'a>

The type of the assembled qc: assembled signature + BitVec

type SignError: Error + Send + Sync

Type of error that can occur when signing data

Required Methods

fn validate( &self, signature: &Self::PureAssembledSignatureType, data: &[u8], ) -> bool

Validate a signature

fn sign( private_key: &Self::PrivateKey, data: &[u8], ) -> Result<Self::PureAssembledSignatureType, Self::SignError>

Produce a signature

Errors

If unable to sign the data with the key

fn from_private(private_key: &Self::PrivateKey) -> Self

Produce a public key from a private key

fn to_bytes(&self) -> Vec<u8>

Serialize a public key to bytes

fn from_bytes(bytes: &[u8]) -> Result<Self, SerializationError>

Deserialize a public key from bytes

Errors

Will return Err if deserialization fails

fn generated_from_seed_indexed( seed: [u8; 32], index: u64, ) -> (Self, Self::PrivateKey)

Generate a new key pair

fn stake_table_entry(&self, stake: U256) -> Self::StakeTableEntry

get the stake table entry from the public key and stake value

fn public_key(entry: &Self::StakeTableEntry) -> Self

only get the public key from the stake table entry

fn public_parameter( stake_entries: &[Self::StakeTableEntry], threshold: U256, ) -> Self::QcParams<'_>

get the public parameter for the assembled signature checking

fn check( real_qc_pp: &Self::QcParams<'_>, data: &[u8], qc: &Self::QcType, ) -> Result<(), SignatureError>

check the quorum certificate for the assembled signature, returning Ok(()) if it is valid.

Errors

Returns an error if the signature key fails to validate

fn signers( real_qc_pp: &Self::QcParams<'_>, qc: &Self::QcType, ) -> Result<Vec<Self::VerificationKeyType>, SignatureError>

Get the list of signers given a qc.

Errors

Returns an error if the inputs mismatch (e.g. wrong verifier parameter or original message).

fn sig_proof( signature: &Self::QcType, ) -> (Self::PureAssembledSignatureType, BitVec)

get the assembled signature and the BitVec separately from the assembled signature

fn assemble( real_qc_pp: &Self::QcParams<'_>, signers: &BitSlice, sigs: &[Self::PureAssembledSignatureType], ) -> Self::QcType

assemble the signature from the partial signature and the indication of signers in BitVec

fn genesis_proposer_pk() -> Self

generates the genesis public key. Meant to be dummy/filler

fn to_verification_key(&self) -> Self::VerificationKeyType

convert the public key to verification key

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 SignatureKey for BLSPubKey

type PrivateKey = SignKey

type StakeTableEntry = StakeTableEntry<VerKey>

type QcParams<'a> = QcParams<'a, VerKey, <BLSOverBN254CurveSignatureScheme as SignatureScheme>::PublicParameter>

type PureAssembledSignatureType = <BLSOverBN254CurveSignatureScheme as SignatureScheme>::Signature

type VerificationKeyType = VerKey

type QcType = (<VerKey as SignatureKey>::PureAssembledSignatureType, BitVec)

type SignError = SignatureError