Struct Distance 

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

The XOR distance between two Keys — a point in the same 256-bit space, ordered as a big-endian unsigned integer (smaller = closer).

Kademlia’s metric: d(a,b) = a XOR b, and d is a valid metric (identity, symmetry, triangle inequality) which is what makes iterative lookups converge. Ord compares big-endian so Distance::ZERO (a key to itself) is the minimum.

Implementations

impl Distance

pub const ZERO: Distance

The zero distance (a key to itself) — the minimum possible distance.

pub const fn as_bytes(&self) -> &[u8; 32]

The raw 32 bytes of the distance.

pub fn bucket_index(&self) -> Option<usize>

The Kademlia bucket index for this distance: 255 - leading_zero_bits, i.e. the position of the most-significant set bit. Returns None for Distance::ZERO (a node never buckets itself). A larger index means a more-distant key (shares a shorter prefix with the reference).

This is exactly the index into a 256-bucket routing table keyed by the length of the shared prefix between this node’s id and the other key.

pub fn to_hex(&self) -> String

Lowercase hex (64 chars).

Trait Implementations

impl Clone for Distance

fn clone(&self) -> Distance

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Distance

impl Debug for Distance

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

Formats the value using the given formatter.

impl Eq for Distance

impl Hash for Distance

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 Ord for Distance

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

Big-endian unsigned-integer comparison — byte 0 is most significant.

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 Distance

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Distance

fn partial_cmp(&self, other: &Self) -> 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 StructuralPartialEq for Distance