Struct PackedStoredNibbles 

pub struct PackedStoredNibbles(pub Nibbles);

Packed representation of nibbles for the AccountsTrie (storage v2).

Stores 2 nibbles per byte via Nibbles::pack, right-padded to 32 bytes + 1 nibble-count byte = 33 bytes fixed. This halves the key size compared to StoredNibbles while preserving sort order under memcmp.

Tuple Fields

0: Nibbles

Implementations

impl PackedStoredNibbles

pub fn to_compact_array(&self) -> [u8; 33]

Encodes the nibbles into a fixed-size [u8; 33] array.

The first 32 bytes contain the packed nibbles (2 per byte, right-padded with zeros), and the 33rd byte stores the actual nibble count.

Trait Implementations

impl<'arbitrary> Arbitrary<'arbitrary> for PackedStoredNibbles

Available on crate feature test-utils only.

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

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

fn arbitrary_take_rest(u: Unstructured<'arbitrary>) -> Result<Self>

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 Clone for PackedStoredNibbles

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Compact for PackedStoredNibbles

Available on crate features reth-codec only.

fn to_compact<B>(&self, buf: &mut B) -> usize

where B: BufMut + AsMut<[u8]>,

Takes a buffer which can be written to. Ideally, it returns the length written to.

fn from_compact(buf: &[u8], _len: usize) -> (Self, &[u8])

Takes a buffer which can be read from. Returns the object and buf with its internal cursor advanced (eg..advance(len)).

fn specialized_to_compact<B>(&self, buf: &mut B) -> usize

where B: BufMut + AsMut<[u8]>,

“Optional”: If there’s no good reason to use it, don’t.

fn specialized_from_compact(buf: &[u8], len: usize) -> (Self, &[u8])

“Optional”: If there’s no good reason to use it, don’t.

impl Compress for PackedStoredNibbles

type Compressed = Vec<u8>

Compressed type.

fn compress_to_buf<B: BufMut + AsMut<[u8]>>(&self, buf: &mut B)

Compresses data to a given buffer.

fn uncompressable_ref(&self) -> Option<&[u8]>

If the type cannot be compressed, return its inner reference as Some(self.as_ref())

fn compress(self) -> Self::Compressed

Compresses data going into the database.

impl Debug for PackedStoredNibbles

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

Formats the value using the given formatter.

impl Decompress for PackedStoredNibbles

fn decompress(value: &[u8]) -> Result<PackedStoredNibbles, DecompressError>

Decompresses data coming from the database.

fn decompress_owned(value: Vec<u8>) -> Result<Self, DecompressError>

Decompresses owned data coming from the database.

impl Default for PackedStoredNibbles

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PackedStoredNibbles

Available on crate features serde only.

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for PackedStoredNibbles

impl From<Nibbles> for PackedStoredNibbles

fn from(value: Nibbles) -> Self

Converts to this type from the input type.

impl From<PackedStoredNibbles> for StoredNibbles

fn from(value: PackedStoredNibbles) -> Self

Converts to this type from the input type.

impl From<StoredNibbles> for PackedStoredNibbles

fn from(value: StoredNibbles) -> Self

Converts to this type from the input type.

impl From<Vec<u8>> for PackedStoredNibbles

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

Converts to this type from the input type.

impl Hash for PackedStoredNibbles

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<__IdxT> Index<__IdxT> for PackedStoredNibbles

where Nibbles: Index<__IdxT>,

type Output = <Nibbles as Index<__IdxT>>::Output

The returned type after indexing.

fn index(&self, idx: __IdxT) -> &Self::Output

Performs the indexing (container[index]) operation.

impl Ord for PackedStoredNibbles

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

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to #147781)

Restrict a value to a certain range.

impl PartialEq for PackedStoredNibbles

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for PackedStoredNibbles

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 Serialize for PackedStoredNibbles

Available on crate features 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 StructuralPartialEq for PackedStoredNibbles

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: 40 bytes