Trait HashedCursor

pub trait HashedCursor {
    type Value: Debug;

    // Required methods
    fn seek(
        &mut self,
        key: FixedBytes<32>,
    ) -> Result<Option<(FixedBytes<32>, Self::Value)>, DatabaseError>;
    fn next(
        &mut self,
    ) -> Result<Option<(FixedBytes<32>, Self::Value)>, DatabaseError>;
}

Available on crate feature trie only.

The cursor for iterating over hashed entries.

Required Associated Types

type Value: Debug

Value returned by the cursor.

Required Methods

fn seek( &mut self, key: FixedBytes<32>, ) -> Result<Option<(FixedBytes<32>, Self::Value)>, DatabaseError>

Seek an entry greater or equal to the given key and position the cursor there. Returns the first entry with the key greater or equal to the sought key.

fn next( &mut self, ) -> Result<Option<(FixedBytes<32>, Self::Value)>, DatabaseError>

Move the cursor to the next entry and return it.

Implementations on Foreign Types

impl<C> HashedCursor for DatabaseHashedAccountCursor<C>

where C: DbCursorRO<HashedAccounts>,

type Value = Account

fn seek( &mut self, key: FixedBytes<32>, ) -> Result<Option<(FixedBytes<32>, <DatabaseHashedAccountCursor<C> as HashedCursor>::Value)>, DatabaseError>

fn next( &mut self, ) -> Result<Option<(FixedBytes<32>, <DatabaseHashedAccountCursor<C> as HashedCursor>::Value)>, DatabaseError>

impl<C> HashedCursor for DatabaseHashedStorageCursor<C>

where C: DbCursorRO<HashedStorages> + DbDupCursorRO<HashedStorages>,

type Value = Uint<256, 4>

fn seek( &mut self, subkey: FixedBytes<32>, ) -> Result<Option<(FixedBytes<32>, <DatabaseHashedStorageCursor<C> as HashedCursor>::Value)>, DatabaseError>

fn next( &mut self, ) -> Result<Option<(FixedBytes<32>, <DatabaseHashedStorageCursor<C> as HashedCursor>::Value)>, DatabaseError>

Implementors

impl HashedCursor for NoopHashedAccountCursor

type Value = Account

impl HashedCursor for NoopHashedStorageCursor

type Value = Uint<256, 4>

impl<C> HashedCursor for HashedPostStateAccountCursor<'_, C>

where C: HashedCursor<Value = Account>,

type Value = Account

impl<C> HashedCursor for HashedPostStateStorageCursor<'_, C>

where C: HashedStorageCursor<Value = Uint<256, 4>>,

type Value = Uint<256, 4>