Enum Tag

#[repr(u8)]
pub enum Tag {
    Identity = 0,
    CompressedEvenY = 2,
    CompressedOddY = 3,
    Uncompressed = 4,
    Compact = 5,
}

Tag byte used by the Elliptic-Curve-Point-to-Octet-String encoding.

Variants

Identity = 0

Identity point (0x00)

CompressedEvenY = 2

Compressed point with even y-coordinate (0x02)

CompressedOddY = 3

Compressed point with odd y-coordinate (0x03)

Uncompressed = 4

Uncompressed point (0x04)

Compact = 5

Compact point (0x05)

Implementations

impl Tag

pub fn from_u8(byte: u8) -> Result<Self>

Parse a tag value from a byte

pub fn is_compact(self) -> bool

Is this point compact?

pub fn is_compressed(self) -> bool

Is this point compressed?

pub fn is_identity(self) -> bool

Is this point the identity point?

pub fn message_len(self, field_element_size: usize) -> usize

Compute the expected total message length for a message prefixed with this tag (including the tag byte), given the field element size (in bytes) for a particular elliptic curve.

Trait Implementations

impl Clone for Tag

fn clone(&self) -> Tag

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Tag

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

Formats the value using the given formatter.

impl From<Tag> for u8

fn from(tag: Tag) -> u8

Converts to this type from the input type.

impl PartialEq for Tag

fn eq(&self, other: &Tag) -> 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 TryFrom<u8> for Tag

type Error = Error

The type returned in the event of a conversion error.

fn try_from(byte: u8) -> Result<Self>

Performs the conversion.

impl Copy for Tag

impl Eq for Tag

impl StructuralPartialEq for Tag