Struct account_state::backend::Basic

pub struct Basic<H>(pub H);

A basic backend. Just wraps the given database, directly inserting into and deleting from it. Doesn’t cache anything.

Trait Implementations

impl<H: AsHashDB<KeccakHasher, DBValue> + Send + Sync> Backend for Basic<H>

fn as_hash_db(&self) -> &dyn HashDB<KeccakHasher, DBValue>

Treat the backend as a read-only hashdb.

fn as_hash_db_mut(&mut self) -> &mut dyn HashDB<KeccakHasher, DBValue>

Treat the backend as a writeable hashdb.

fn add_to_account_cache(&mut self, _: Address, _: Option<Account>, _: bool)

Add an account entry to the cache.

fn cache_code(&self, _: H256, _: Arc<Vec<u8>>)

Add a global code cache entry. This doesn’t need to worry about canonicality because it simply maps hashes to raw code and will always be correct in the absence of hash collisions.

fn get_cached_account(&self, _: &Address) -> Option<Option<Account>>

Get basic copy of the cached account. Not required to include storage. Returns ‘None’ if cache is disabled or if the account is not cached.

fn get_cached<F, U>(&self, _: &Address, _: F) -> Option<U> where
    F: FnOnce(Option<&mut Account>) -> U, 

Get value from a cached account. None is passed to the closure if the account entry cached is known not to exist. None is returned if the entry is not cached.

fn get_cached_code(&self, _: &H256) -> Option<Arc<Vec<u8>>>

Get cached code based on hash.

fn note_non_null_account(&self, _: &Address)

Note that an account with the given address is non-null.

fn is_known_null(&self, _: &Address) -> bool

Check whether an account is known to be empty. Returns true if known to be empty, false otherwise.