Enum StorageSlot

pub enum StorageSlot {
    Value(Word),
    Map(StorageMap),
}

An object representing the contents of an account’s storage slot.

An account storage slot can be of two types:

• A simple value which contains a single word (4 field elements or ~32 bytes).
• A key value map where both keys and values are words. The capacity of such storage slot is theoretically unlimited.

Variants

Value(Word)

Map(StorageMap)

Implementations

impl StorageSlot

pub const NUM_ELEMENTS_PER_STORAGE_SLOT: usize = 8usize

The number of field elements needed to represent a StorageSlot in kernel memory.

pub fn is_default(&self) -> bool

Returns true if this storage slot has a value equal the default of it’s type

pub fn default_word(&self) -> Word

Returns the empty Word for a storage slot of this type

pub fn empty_value() -> Self

Returns a StorageSlot::Value with an empty word.

pub fn empty_map() -> Self

Returns an empty StorageSlot::Map.

pub fn value(&self) -> Word

Returns this storage slot value as a Word

Returns:

• For StorageSlot::Value the value
• For StorageSlot::Map the root of the StorageMap

pub fn slot_type(&self) -> StorageSlotType

Returns the type of this storage slot

Trait Implementations

impl Clone for StorageSlot

fn clone(&self) -> StorageSlot

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StorageSlot

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

Formats the value using the given formatter.

impl Deserializable for StorageSlot

fn read_from<R: ByteReader>( source: &mut R, ) -> Result<Self, DeserializationError>

Reads a sequence of bytes from the provided source, attempts to deserialize these bytes into Self, and returns the result.

fn read_from_bytes(bytes: &[u8]) -> Result<Self, DeserializationError>

Attempts to deserialize the provided bytes into Self and returns the result.

impl PartialEq for StorageSlot

fn eq(&self, other: &StorageSlot) -> 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 Serializable for StorageSlot

fn write_into<W: ByteWriter>(&self, target: &mut W)

Serializes self into bytes and writes these bytes into the target.

fn get_size_hint(&self) -> usize

Returns an estimate of how many bytes are needed to represent self.

fn to_bytes(&self) -> Vec<u8>

Serializes self into a vector of bytes.

impl Eq for StorageSlot

impl StructuralPartialEq for StorageSlot