Struct tc_client_db::RefTrackingState

pub struct RefTrackingState<Block: BlockT> { /* fields omitted */ }

A reference tracking state.

It makes sure that the hash we are using stays pinned in storage until this structure is dropped.

Trait Implementations

impl<B: BlockT> Backend<<<B as Block>::Header as Header>::Hashing> for RefTrackingState<B>

type Error = <DbState<B> as StateBackend<HashFor<B>>>::Error

An error type when fetching data is not possible.

type Transaction = <DbState<B> as StateBackend<HashFor<B>>>::Transaction

Storage changes to be applied if committing

type TrieBackendStorage = <DbState<B> as StateBackend<HashFor<B>>>::TrieBackendStorage

Type of trie backend storage.

fn storage(&self, key: &[u8]) -> Result<Option<Vec<u8>>, Self::Error>

Get keyed storage or None if there is nothing associated.

fn storage_hash(&self, key: &[u8]) -> Result<Option<B::Hash>, Self::Error>

Get keyed storage value hash or None if there is nothing associated.

fn child_storage(
    &self,
    child_info: &ChildInfo,
    key: &[u8]
) -> Result<Option<Vec<u8>>, Self::Error>

Get keyed child storage or None if there is nothing associated.

fn exists_storage(&self, key: &[u8]) -> Result<bool, Self::Error>

true if a key exists in storage.

fn exists_child_storage(
    &self,
    child_info: &ChildInfo,
    key: &[u8]
) -> Result<bool, Self::Error>

true if a key exists in child storage.

fn next_storage_key(&self, key: &[u8]) -> Result<Option<Vec<u8>>, Self::Error>

Return the next key in storage in lexicographic order or None if there is no value.

fn next_child_storage_key(
    &self,
    child_info: &ChildInfo,
    key: &[u8]
) -> Result<Option<Vec<u8>>, Self::Error>

Return the next key in child storage in lexicographic order or None if there is no value.

fn for_keys_with_prefix<F: FnMut(&[u8])>(&self, prefix: &[u8], f: F)

Retrieve all entries keys which start with the given prefix and call f for each of those keys.

fn for_key_values_with_prefix<F: FnMut(&[u8], &[u8])>(
    &self,
    prefix: &[u8],
    f: F
)

Retrieve all entries keys and values of which start with the given prefix and call f for each of those keys.

fn apply_to_child_keys_while<F: FnMut(&[u8]) -> bool>(
    &self,
    child_info: &ChildInfo,
    f: F
)

Retrieve all entries keys of child storage and call f for each of those keys. Aborts as soon as f returns false.

fn for_child_keys_with_prefix<F: FnMut(&[u8])>(
    &self,
    child_info: &ChildInfo,
    prefix: &[u8],
    f: F
)

Retrieve all child entries keys which start with the given prefix and call f for each of those keys.

fn storage_root<'a>(
    &self,
    delta: impl Iterator<Item = (&'a [u8], Option<&'a [u8]>)>
) -> (B::Hash, Self::Transaction) where
    B::Hash: Ord, 

Calculate the storage root, with given delta over what is already stored in the backend, and produce a “transaction” that can be used to commit. Does not include child storage updates.

fn child_storage_root<'a>(
    &self,
    child_info: &ChildInfo,
    delta: impl Iterator<Item = (&'a [u8], Option<&'a [u8]>)>
) -> (B::Hash, bool, Self::Transaction) where
    B::Hash: Ord, 

Calculate the child storage root, with given delta over what is already stored in the backend, and produce a “transaction” that can be used to commit. The second argument is true if child storage root equals default storage root.

fn pairs(&self) -> Vec<(Vec<u8>, Vec<u8>)>

Get all key/value pairs into a Vec.

fn keys(&self, prefix: &[u8]) -> Vec<Vec<u8>>

Get all keys with given prefix

fn child_keys(&self, child_info: &ChildInfo, prefix: &[u8]) -> Vec<Vec<u8>>

Get all keys of child storage with given prefix

fn as_trie_backend(
    &mut self
) -> Option<&TrieBackend<Self::TrieBackendStorage, HashFor<B>>>

Try convert into trie backend.

fn register_overlay_stats(&mut self, stats: &StateMachineStats)

Register stats from overlay of state machine.

fn usage_info(&self) -> StateUsageInfo

Query backend usage statistics (i/o, memory)

pub fn child_storage_hash(
    &self,
    child_info: &ChildInfo,
    key: &[u8]
) -> Result<Option<<H as Hasher>::Out>, Self::Error>

Get child keyed storage value hash or None if there is nothing associated.

pub fn full_storage_root<'a>(
    &self,
    delta: impl Iterator<Item = (&'a [u8], Option<&'a [u8]>)>,
    child_deltas: impl Iterator<Item = (&'a ChildInfo, impl Iterator<Item = (&'a [u8], Option<&'a [u8]>)>)>
) -> (<H as Hasher>::Out, Self::Transaction) where
    <H as Hasher>::Out: Ord,
    <H as Hasher>::Out: Encode, 

Calculate the storage root, with given delta over what is already stored in the backend, and produce a “transaction” that can be used to commit. Does include child storage updates.

pub fn wipe(&self) -> Result<(), Self::Error>

Wipe the state database.

pub fn commit(
    &self,
    <H as Hasher>::Out,
    Self::Transaction,
    Vec<(Vec<u8, Global>, Option<Vec<u8, Global>>), Global>,
    Vec<(Vec<u8, Global>, Vec<(Vec<u8, Global>, Option<Vec<u8, Global>>), Global>), Global>
) -> Result<(), Self::Error>

Commit given transaction to storage.

pub fn read_write_count(&self) -> (u32, u32, u32, u32)

Get the read/write count of the db

pub fn reset_read_write_count(&self)

Get the read/write count of the db

pub fn get_whitelist(&self) -> Vec<TrackedStorageKey, Global>

Get the whitelist for tracking db reads/writes

pub fn set_whitelist(&self, Vec<TrackedStorageKey, Global>)

Update the whitelist for tracking db reads/writes

impl<Block: BlockT> Debug for RefTrackingState<Block>

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

Formats the value using the given formatter.

impl<B: BlockT> Drop for RefTrackingState<B>

fn drop(&mut self)

Executes the destructor for this type.