Struct Signature 

pub struct Signature { /* private fields */ }

An Ethereum ECDSA signature.

Implementations

impl Signature

pub fn decode_rlp_vrs( buf: &mut &[u8], decode_parity: impl FnOnce(&mut &[u8]) -> Result<bool>, ) -> Result<Self, Error>

Available on crate feature rlp only.

Decode an RLP-encoded VRS signature. Accepts decode_parity closure which allows to customize parity decoding and possibly extract additional data from it (e.g chain_id for legacy signature).

impl Signature

pub const fn new(r: U256, s: U256, y_parity: bool) -> Self

Instantiate a new signature from r, s, and v values.

pub fn from_raw(bytes: &[u8]) -> Result<Self, SignatureError>

Parses a 65-byte long raw signature.

The first 32 bytes is the r value, the second 32 bytes the s value, and the final byte is the v value in ‘Electrum’ notation.

pub fn from_raw_array(bytes: &[u8; 65]) -> Result<Self, SignatureError>

Parses a 65-byte long raw signature.

See from_raw.

pub fn from_bytes_and_parity(bytes: &[u8], parity: bool) -> Self

Parses a signature from a byte slice, with a v value

Panics

If the slice is not at least 64 bytes long.

pub fn as_bytes(&self) -> [u8; 65]

Returns the byte-array representation of this signature.

The first 32 bytes are the r value, the second 32 bytes the s value and the final byte is the v value in ‘Electrum’ notation.

pub fn as_rsy(&self) -> [u8; 65]

Returns the byte-array representation of this signature as (r, s, y_parity).

The first 32 bytes are the r value, the second 32 bytes the s value, and the final byte is the y_parity value as-is (0 or 1).

See as_erc2098 for the compact ERC-2098 representation.

pub fn from_erc2098(bytes: &[u8]) -> Self

Decode the signature from the ERC-2098 compact representation.

The first 32 bytes are the r value, and the next 32 bytes are the s value with yParity in the top bit of the s value, as described in ERC-2098.

See https://eips.ethereum.org/EIPS/eip-2098

Panics

If the slice is not at least 64 bytes long.

pub fn as_erc2098(&self) -> [u8; 64]

Returns the ERC-2098 compact representation of this signature.

The first 32 bytes are the r value, and the next 32 bytes are the s value with yParity in the top bit of the s value, as described in ERC-2098.

See https://eips.ethereum.org/EIPS/eip-2098

pub fn with_parity(self, v: bool) -> Self

Sets the recovery ID by normalizing a v value.

pub fn to_k256(self) -> Result<Signature, Error>

Available on crate feature k256 only.

Returns the inner ECDSA signature.

pub fn from_signature_and_parity(sig: Signature, v: bool) -> Self

Available on crate feature k256 only.

Instantiate from a signature and recovery id

pub fn from_scalars_and_parity(r: B256, s: B256, parity: bool) -> Self

Creates a Signature from the serialized r and s scalar values, which comprise the ECDSA signature, alongside a v value, used to determine the recovery ID.

pub fn normalize_s(&self) -> Option<Self>

Normalizes the signature into “low S” form as described in BIP 0062: Dealing with Malleability.

If s is already normalized, returns None.

pub fn normalized_s(self) -> Self

Normalizes the signature into “low S” form as described in BIP 0062: Dealing with Malleability.

If s is already normalized, returns self.

pub fn recid(&self) -> RecoveryId

Available on crate feature k256 only.

Returns the recovery ID.

pub fn recover_address_from_msg<T: AsRef<[u8]>>( &self, msg: T, ) -> Result<Address, SignatureError>

Available on crate feature k256 only.

Recovers an Address from this signature and the given message by first prefixing and hashing the message according to EIP-191.

pub fn recover_address_from_prehash( &self, prehash: &B256, ) -> Result<Address, SignatureError>

Available on crate feature k256 only.

Recovers an Address from this signature and the given prehashed message.

pub fn recover_from_msg<T: AsRef<[u8]>>( &self, msg: T, ) -> Result<VerifyingKey, SignatureError>

Available on crate feature k256 only.

Recovers a VerifyingKey from this signature and the given message by first prefixing and hashing the message according to EIP-191.

pub fn recover_from_prehash( &self, prehash: &B256, ) -> Result<VerifyingKey, SignatureError>

Available on crate feature k256 only.

Recovers a VerifyingKey from this signature and the given prehashed message.

pub fn r(&self) -> U256

Returns the r component of this signature.

pub fn s(&self) -> U256

Returns the s component of this signature.

pub fn v(&self) -> bool

Returns the recovery ID as a bool.

pub fn rlp_rs_len(&self) -> usize

Available on crate feature rlp only.

Length of RLP RS field encoding

pub fn write_rlp_rs(&self, out: &mut dyn BufMut)

Available on crate feature rlp only.

Write R and S to an RLP buffer in progress.

pub fn write_rlp_vrs(&self, out: &mut dyn BufMut, v: impl Encodable)

Available on crate feature rlp only.

Write the VRS to the output.

Trait Implementations

impl<'a> Arbitrary<'a> for Signature

Available on crate feature arbitrary only.

fn arbitrary(u: &mut Unstructured<'a>) -> Result<Self>

Generate an arbitrary value of Self from the given unstructured data.

fn arbitrary_take_rest(u: Unstructured<'a>) -> Result<Self, Error>

Generate an arbitrary value of Self from the entirety of the given unstructured data.

fn size_hint(depth: usize) -> (usize, Option<usize>)

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

fn try_size_hint( depth: usize, ) -> Result<(usize, Option<usize>), MaxRecursionReached>

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

impl Arbitrary for Signature

Available on crate feature arbitrary only.

type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.

type Strategy = Map<<(Uint<256, 4>, Uint<256, 4>, bool) as Arbitrary>::Strategy, fn((Uint<256, 4>, Uint<256, 4>, bool)) -> Signature>

The type of Strategy used to generate values of type Self.

fn arbitrary_with((): Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args.

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self).

impl<'__expr> AsExpression<Binary> for &'__expr Signature

type Expression = Bound<Binary, &'__expr Signature>

The expression being returned

fn as_expression(self) -> <Self as AsExpression<Binary>>::Expression

Perform the conversion

impl AsExpression<Binary> for Signature

type Expression = Bound<Binary, Signature>

The expression being returned

fn as_expression(self) -> <Self as AsExpression<Binary>>::Expression

Perform the conversion

impl<'__expr> AsExpression<Nullable<Binary>> for &'__expr Signature

type Expression = Bound<Nullable<Binary>, &'__expr Signature>

The expression being returned

fn as_expression(self) -> <Self as AsExpression<Nullable<Binary>>>::Expression

Perform the conversion

impl AsExpression<Nullable<Binary>> for Signature

type Expression = Bound<Nullable<Binary>, Signature>

The expression being returned

fn as_expression(self) -> <Self as AsExpression<Nullable<Binary>>>::Expression

Perform the conversion

impl Clone for Signature

fn clone(&self) -> Signature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Signature

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Signature

Available on crate feature serde only.

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Signature

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

Formats the value using the given formatter.

impl From<&Signature> for [u8; 65]

fn from(value: &Signature) -> [u8; 65]

Converts to this type from the input type.

impl From<&Signature> for Vec<u8>

fn from(value: &Signature) -> Self

Converts to this type from the input type.

impl From<(Signature<Secp256k1>, RecoveryId)> for Signature

Available on crate feature k256 only.

fn from(value: (Signature, RecoveryId)) -> Self

Converts to this type from the input type.

impl From<Signature> for [u8; 65]

fn from(value: Signature) -> [u8; 65]

Converts to this type from the input type.

impl From<Signature> for Vec<u8>

fn from(value: Signature) -> Self

Converts to this type from the input type.

impl<Db: Backend> FromSql<Binary, Db> for Signature

where *const [u8]: FromSql<Binary, Db>,

Available on crate feature diesel only.

fn from_sql(bytes: Db::RawValue<'_>) -> DeserResult<Self>

See the trait documentation.

fn from_nullable_sql( bytes: Option<<DB as Backend>::RawValue<'_>>, ) -> Result<Self, Box<dyn Error + Sync + Send>>

A specialized variant of from_sql for handling null values.

impl FromStr for Signature

type Err = SignatureError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Signature

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Signature

fn eq(&self, other: &Signature) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<__DB, __ST> Queryable<__ST, __DB> for Signature

where __DB: Backend, __ST: SingleValue, Self: FromSql<__ST, __DB>,

type Row = Signature

The Rust type you’d like to map from.

fn build(row: Self) -> Result<Self>

Construct an instance of this type

impl Serialize for Signature

Available on crate feature serde only.

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<Db> ToSql<Binary, Db> for Signature

where for<'c> Db: Backend<BindCollector<'c> = RawBytesBindCollector<Db>> + Backend,

Available on crate feature diesel only.

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Db>) -> SerResult

See the trait documentation.

impl<__DB> ToSql<Nullable<Binary>, __DB> for Signature

where __DB: Backend, Self: ToSql<Binary, __DB>,

fn to_sql<'__b>(&'__b self, out: &mut Output<'__b, '_, __DB>) -> Result

See the trait documentation.

impl TryFrom<&[u8]> for Signature

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

Parses a 65-byte long raw signature.

See from_raw.

type Error = SignatureError

The type returned in the event of a conversion error.

impl TryFrom<Signature> for Signature

Available on crate feature k256 only.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Signature) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for Signature

impl Eq for Signature

impl StructuralPartialEq for Signature

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 72 bytes