Struct CompactTarget 

pub struct CompactTarget(/* private fields */);

Encoding of 256-bit target as 32-bit float.

This is used to encode a target into the block header. Satoshi made this part of consensus code in the original version of Bitcoin, likely copying an idea from OpenSSL.

OpenSSL’s bignum (BN) type has an encoding, which is even called “compact” as in bitcoin, which is exactly this format.

Note on order/equality

Usage of the ordering and equality traits for this type may be surprising. Converting between CompactTarget and Target is lossy in both directions (there are multiple CompactTarget values that map to the same Target value). Ordering and equality for this type are defined in terms of the underlying u32.

Implementations

impl CompactTarget

pub fn from_consensus(bits: u32) -> Self

Constructs a new CompactTarget from a consensus encoded u32.

pub fn to_consensus(self) -> u32

Returns the consensus encoded u32 representation of this CompactTarget.

impl CompactTarget

pub fn to_hex(&self) -> String

Available on crate feature alloc only.

Gets the hex representation of this type

Trait Implementations

impl Clone for CompactTarget

fn clone(&self) -> CompactTarget

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompactTarget

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

Formats the value using the given formatter.

impl Default for CompactTarget

fn default() -> CompactTarget

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CompactTarget

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for CompactTarget

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 LowerHex for CompactTarget

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

Formats the value using the given formatter.

impl Ord for CompactTarget

fn cmp(&self, other: &CompactTarget) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for CompactTarget

fn eq(&self, other: &CompactTarget) -> 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 PartialOrd for CompactTarget

fn partial_cmp(&self, other: &CompactTarget) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for CompactTarget

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl UpperHex for CompactTarget

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

Formats the value using the given formatter.

impl Copy for CompactTarget

impl Eq for CompactTarget

impl StructuralPartialEq for CompactTarget