Struct AccountStorageDelta 

pub struct AccountStorageDelta { /* private fields */ }

AccountStorageDelta stores the differences between two states of account storage.

The delta consists of two maps:

• A map containing the updates to value storage slots. The keys in this map are indexes of the updated storage slots and the values are the new values for these slots.
• A map containing updates to storage maps. The keys in this map are indexes of the updated storage slots and the values are corresponding storage map delta objects.

Implementations

impl AccountStorageDelta

pub fn new() -> AccountStorageDelta

Creates a new, empty storage delta.

pub fn from_parts( values: BTreeMap<u8, Word>, maps: BTreeMap<u8, StorageMapDelta>, ) -> Result<AccountStorageDelta, AccountDeltaError>

Creates a new storage delta from the provided fields.

Errors

Returns an error if:

• Any of the updated slot is referenced from both maps, which means a slot is treated as both a value and a map slot.

pub fn values(&self) -> &BTreeMap<u8, Word>

Returns a reference to the updated values in this storage delta.

pub fn maps(&self) -> &BTreeMap<u8, StorageMapDelta>

Returns a reference to the updated maps in this storage delta.

pub fn is_empty(&self) -> bool

Returns true if storage delta contains no updates.

pub fn set_item(&mut self, slot_index: u8, new_slot_value: Word)

Tracks a slot change

pub fn set_map_item(&mut self, slot_index: u8, key: Word, new_value: Word)

Tracks a map item change

pub fn insert_empty_map_delta(&mut self, slot_index: u8)

Inserts an empty storage map delta for the provided slot index.

This is useful for full state deltas to represent an empty map in the delta.

pub fn merge( &mut self, other: AccountStorageDelta, ) -> Result<(), AccountDeltaError>

Merges another delta into this one, overwriting any existing values.

pub fn into_parts(self) -> (BTreeMap<u8, Word>, BTreeMap<u8, StorageMapDelta>)

Consumes self and returns the underlying parts of the storage delta.

Trait Implementations

impl Clone for AccountStorageDelta

fn clone(&self) -> AccountStorageDelta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AccountStorageDelta

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

Formats the value using the given formatter.

impl Default for AccountStorageDelta

fn default() -> AccountStorageDelta

Returns the “default value” for a type.

impl Deserializable for AccountStorageDelta

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

where R: ByteReader,

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 AccountStorageDelta

fn eq(&self, other: &AccountStorageDelta) -> 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 AccountStorageDelta

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

where W: ByteWriter,

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 AccountStorageDelta

impl StructuralPartialEq for AccountStorageDelta