Struct libp2p_kad::KBucketKey

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pub struct KBucketKey<T> { /* private fields */ }
Expand description

A Key in the DHT keyspace with preserved preimage.

Keys in the DHT keyspace identify both the participating nodes, as well as the records stored in the DHT.

Keys have an XOR metric as defined in the Kademlia paper, i.e. the bitwise XOR of the hash digests, interpreted as an integer. See Key::distance.

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impl<T> Key<T>

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pub fn new(preimage: T) -> Key<T>
where T: Borrow<[u8]>,

Constructs a new Key by running the given value through a random oracle.

The preimage of type T is preserved. See Key::preimage and Key::into_preimage.

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pub fn preimage(&self) -> &T

Borrows the preimage of the key.

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pub fn into_preimage(self) -> T

Converts the key into its preimage.

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pub fn distance<U>(&self, other: &U) -> Distance
where U: AsRef<KeyBytes>,

Computes the distance of the keys according to the XOR metric.

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pub fn hashed_bytes(&self) -> &[u8]

Exposing the hashed bytes.

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pub fn for_distance(&self, d: Distance) -> KeyBytes

Returns the uniquely determined key with the given distance to self.

This implements the following equivalence:

self xor other = distance <==> other = self xor distance

Trait Implementations§

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impl<T: Clone> Clone for Key<T>

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fn clone(&self) -> Key<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T: Debug> Debug for Key<T>

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

Formats the value using the given formatter. Read more
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impl From<Key> for Key<Key>

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fn from(k: Key) -> Self

Converts to this type from the input type.
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impl<const S: usize> From<Multihash<S>> for Key<Multihash<S>>

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fn from(m: Multihash<S>) -> Self

Converts to this type from the input type.
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impl From<PeerId> for Key<PeerId>

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fn from(p: PeerId) -> Self

Converts to this type from the input type.
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impl From<Vec<u8>> for Key<Vec<u8>>

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fn from(b: Vec<u8>) -> Self

Converts to this type from the input type.
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impl<T> Hash for Key<T>

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<T, U> PartialEq<Key<U>> for Key<T>

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fn eq(&self, other: &Key<U>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T: Copy> Copy for Key<T>

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impl<T> Eq for Key<T>

Auto Trait Implementations§

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impl<T> Freeze for Key<T>
where T: Freeze,

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impl<T> RefUnwindSafe for Key<T>
where T: RefUnwindSafe,

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impl<T> Send for Key<T>
where T: Send,

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impl<T> Sync for Key<T>
where T: Sync,

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impl<T> Unpin for Key<T>
where T: Unpin,

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impl<T> UnwindSafe for Key<T>
where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more