Struct sc_client_db::RefTrackingState

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

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> AsTrieBackend<<<B as Block>::Header as Header>::Hashing, LocalTrieCache<<<B as Block>::Header as Header>::Hashing>> for RefTrackingState<B>

type TrieBackendStorage = <TrieBackend<Arc<dyn Storage<<<B as Block>::Header as Header>::Hashing>>, <<B as Block>::Header as Header>::Hashing, LocalTrieCache<<<B as Block>::Header as Header>::Hashing>> as Backend<<<B as Block>::Header as Header>::Hashing>>::TrieBackendStorage

Type of trie backend storage.

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

Return the type as TrieBackend.

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

type Error = <TrieBackend<Arc<dyn Storage<<<B as Block>::Header as Header>::Hashing>>, <<B as Block>::Header as Header>::Hashing, LocalTrieCache<<<B as Block>::Header as Header>::Hashing>> as Backend<<<B as Block>::Header as Header>::Hashing>>::Error

An error type when fetching data is not possible.

type Transaction = <TrieBackend<Arc<dyn Storage<<<B as Block>::Header as Header>::Hashing>>, <<B as Block>::Header as Header>::Hashing, LocalTrieCache<<<B as Block>::Header as Header>::Hashing>> as Backend<<<B as Block>::Header as Header>::Hashing>>::Transaction

Storage changes to be applied if committing

type TrieBackendStorage = <TrieBackend<Arc<dyn Storage<<<B as Block>::Header as Header>::Hashing>>, <<B as Block>::Header as Header>::Hashing, LocalTrieCache<<<B as Block>::Header as Header>::Hashing>> as Backend<<<B as Block>::Header as Header>::Hashing>>::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 child_storage_hash( &self, child_info: &ChildInfo, key: &[u8] ) -> Result<Option<B::Hash>, Self::Error>

Get child keyed storage value hash 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_key_values_while<F: FnMut(Vec<u8>, Vec<u8>) -> bool>( &self, child_info: Option<&ChildInfo>, prefix: Option<&[u8]>, start_at: Option<&[u8]>, f: F, allow_missing: bool ) -> Result<bool, Self::Error>

Iterate over storage starting at key, for a given prefix and child trie. Aborts as soon as f returns false. Warning, this fails at first error when usual iteration skips errors. If allow_missing is true, iteration stops when it reaches a missing trie node. Otherwise an error is produced.

fn apply_to_keys_while<F: FnMut(&[u8]) -> bool>( &self, child_info: Option<&ChildInfo>, prefix: Option<&[u8]>, start_at: Option<&[u8]>, f: F )

Retrieve all entries keys of 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]>)>, state_version: StateVersion ) -> (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]>)>, state_version: StateVersion ) -> (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 register_overlay_stats(&self, stats: &StateMachineStats)

Register stats from overlay of state machine.

fn usage_info(&self) -> StateUsageInfo

Query backend usage statistics (i/o, memory)

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

Wipe the state database.

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.

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

Get the read/write count of the db

fn reset_read_write_count(&self)

Get the read/write count of the db

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

Get the whitelist for tracking db reads/writes

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

Update the whitelist for tracking db reads/writes

fn proof_size(&self) -> Option<u32>

Estimate proof size

fn get_read_and_written_keys( &self ) -> Vec<(Vec<u8, Global>, u32, u32, bool), Global>

Extend storage info for benchmarking db

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.