Struct HashedPostStateCursor 

pub struct HashedPostStateCursor<'a, C, V>
where
    V: HashedPostStateCursorValue,
{ /* private fields */ }

A cursor to iterate over state updates and corresponding database entries. It will always give precedence to the data from the post state updates.

Implementations

impl<'a, C> HashedPostStateCursor<'a, C, Option<Account>>

where C: HashedCursor<Value = Account>,

pub fn new_account(cursor: C, post_state: &'a HashedPostStateSorted) -> Self

Create new account cursor which combines a DB cursor and the post state.

impl<'a, C> HashedPostStateCursor<'a, C, U256>

where C: HashedStorageCursor<Value = U256>,

pub fn new_storage( cursor: C, post_state: &'a HashedPostStateSorted, hashed_address: B256, ) -> Self

Create new storage cursor with full post state reference. This allows the cursor to switch between storage tries when set_hashed_address is called.

Trait Implementations

impl<'a, C: Debug, V> Debug for HashedPostStateCursor<'a, C, V>

where V: HashedPostStateCursorValue + Debug, V::NonZero: Debug,

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

Formats the value using the given formatter.

impl<C, V> HashedCursor for HashedPostStateCursor<'_, C, V>

where C: HashedCursor<Value = V::NonZero>, V: HashedPostStateCursorValue,

fn seek( &mut self, key: B256, ) -> Result<Option<(B256, Self::Value)>, DatabaseError>

Seek the next entry for a given hashed key.

If the post state contains the exact match for the key, return it. Otherwise, retrieve the next entries that are greater than or equal to the key from the database and the post state. The two entries are compared and the lowest is returned.

The returned account key is memoized and the cursor remains positioned at that key until HashedCursor::seek or HashedCursor::next are called.

fn next(&mut self) -> Result<Option<(B256, Self::Value)>, DatabaseError>

Retrieve the next entry from the cursor.

If the cursor is positioned at the entry, return the entry with next greater key. Returns None if the previous memoized or the next greater entries are missing.

NOTE: This function will not return any entry unless HashedCursor::seek has been called.

type Value = <V as HashedPostStateCursorValue>::NonZero

Value returned by the cursor.

fn reset(&mut self)

Reset the cursor to its initial state.

impl<C> HashedStorageCursor for HashedPostStateCursor<'_, C, U256>

where C: HashedStorageCursor<Value = U256>,

The cursor to iterate over post state hashed values and corresponding database entries. It will always give precedence to the data from the post state.

fn is_storage_empty(&mut self) -> Result<bool, DatabaseError>

Returns true if the account has no storage entries.

This function should be called before attempting to call HashedCursor::seek or HashedCursor::next.

fn set_hashed_address(&mut self, hashed_address: B256)

Set the hashed address for the storage cursor.

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.