Struct sp_state_machine::TrieBackend

impl<H: Hasher, KF> TrieBackend<GenericMemoryDB<H, KF>, H>where
H::Out: Codec + Ord,
KF: KeyFunction<H> + Send + Sync,

pub fn update<T: IntoIterator<Item = (Option<ChildInfo>, StorageCollection)>>(
 &self,
 changes: T,
 state_version: StateVersion
) -> Self

Copy the state, with applied updates

pub fn insert<T: IntoIterator<Item = (Option<ChildInfo>, StorageCollection)>>(
 &mut self,
 changes: T,
 state_version: StateVersion
)

Insert values into backend trie.

pub fn update_backend(
 &self,
 root: H::Out,
 changes: GenericMemoryDB<H, KF>
) -> Self

Merge trie nodes into this backend.

pub fn apply_transaction(
 &mut self,
 root: H::Out,
 transaction: GenericMemoryDB<H, KF>
)

Apply the given transaction to this backend and set the root to the given value.

pub fn eq(&self, other: &Self) -> bool

Compare with another in-memory backend.

impl<S: TrieBackendStorage<H>, H: Hasher, C: AsLocalTrieCache<H> + Send + Sync> TrieBackend<S, H, C>where
H::Out: Codec,

pub fn essence(&self) -> &TrieBackendEssence<S, H, C>

Get backend essence reference.

pub fn backend_storage(&self) -> &S

Get backend storage reference.

pub fn root(&self) -> &H::Out

Get trie root.

pub fn into_storage(self) -> S

Consumes self and returns underlying storage.

pub fn extract_proof(self) -> Option<StorageProof>

Extract the StorageProof.

This only returns Some when there was a recorder set.

Trait Implementations§

impl<S: TrieBackendStorage<H>, H: Hasher, C> AsTrieBackend<H, C> for TrieBackend<S, H, C>

fn as_trie_backend(&self) -> &TrieBackend<S, H, C>

Return the type as TrieBackend.

impl<S: TrieBackendStorage<H>, H: Hasher, C: AsLocalTrieCache<H> + Send + Sync> Backend<H> for TrieBackend<S, H, C>where
H::Out: Ord + Codec,

type Error = String

An error type when fetching data is not possible.

type Transaction = <S as TrieBackendStorage<H>>::Overlay

Storage changes to be applied if committing

type RawIter = RawIter<S, H, C>

Type of the raw storage iterator.

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

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

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

Get keyed storage or None if there is nothing associated.

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

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

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

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

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

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

fn raw_iter(&self, args: IterArgs<'_>) -> Result<Self::RawIter, Self::Error>

Returns a lifetimeless raw storage iterator.

fn storage_root<'a>(
 &self,
 delta: impl Iterator<Item = (&'a [u8], Option<&'a [u8]>)>,
 state_version: StateVersion
) -> (H::Out, Self::Transaction)where
 H::Out: 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. Read more

fn child_storage_root<'a>(
 &self,
 child_info: &ChildInfo,
 delta: impl Iterator<Item = (&'a [u8], Option<&'a [u8]>)>,
 state_version: StateVersion
) -> (H::Out, bool, Self::Transaction)where
 H::Out: 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. Read more

fn register_overlay_stats(&self, _stats: &StateMachineStats)

Register stats from overlay of state machine. Read more

fn usage_info(&self) -> UsageInfo

Query backend usage statistics (i/o, memory) Read more

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

Wipe the state database.

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 pairs<'a>(
&'a self,
args: IterArgs<'_>
) -> Result<PairsIter<'a, H, Self::RawIter>, Self::Error>

Get an iterator over key/value pairs.

fn keys<'a>(
&'a self,
args: IterArgs<'_>
) -> Result<KeysIter<'a, H, Self::RawIter>, Self::Error>

Get an iterator over keys.

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]>)>)>,
 state_version: StateVersion
) -> (H::Out, Self::Transaction)where
 H::Out: Ord + 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. Read more

fn commit(
 &self,
 _: H::Out,
 _: Self::Transaction,
 _: StorageCollection,
 _: ChildStorageCollection
) -> 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> ⓘ

Get the whitelist for tracking db reads/writes

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

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>, u32, u32, bool)> ⓘ

Extend storage info for benchmarking db

impl<H: Hasher, KF> Clone for TrieBackend<GenericMemoryDB<H, KF>, H>where
H::Out: Codec + Ord,
KF: KeyFunction<H> + Send + Sync,

fn clone(&self) -> Self

Returns a copy of the value. Read more

1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl<S: TrieBackendStorage<H>, H: Hasher, C: AsLocalTrieCache<H>> Debug for TrieBackend<S, H, C>

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

Formats the value using the given formatter. Read more

impl<H, KF> Default for TrieBackend<GenericMemoryDB<H, KF>, H>where
 H: Hasher,
 H::Out: Codec + Ord,
 KF: KeyFunction<H> + Send + Sync,

fn default() -> Self

Returns the “default value” for a type. Read more

impl<H: Hasher, KF> From<(BTreeMap<Vec<u8, Global>, Vec<u8, Global>, Global>, StateVersion)> for TrieBackend<GenericMemoryDB<H, KF>, H>where
H::Out: Codec + Ord,
KF: KeyFunction<H> + Send + Sync,

fn from(
(inner, state_version): (BTreeMap<StorageKey, StorageValue>, StateVersion)
) -> Self

Converts to this type from the input type.

impl<H: Hasher, KF> From<(HashMap<Option<ChildInfo>, BTreeMap<Vec<u8, Global>, Vec<u8, Global>, Global>, RandomState>, StateVersion)> for TrieBackend<GenericMemoryDB<H, KF>, H>where
H::Out: Codec + Ord,
KF: KeyFunction<H> + Send + Sync,

fn from(
(inner, state_version): (HashMap<Option<ChildInfo>, BTreeMap<StorageKey, StorageValue>>, StateVersion)
) -> Self

Converts to this type from the input type.

impl<H: Hasher, KF> From<(Storage, StateVersion)> for TrieBackend<GenericMemoryDB<H, KF>, H>where
H::Out: Codec + Ord,
KF: KeyFunction<H> + Send + Sync,

fn from((inners, state_version): (Storage, StateVersion)) -> Self

Converts to this type from the input type.

impl<H: Hasher, KF> From<(Vec<(Option<ChildInfo>, Vec<(Vec<u8, Global>, Option<Vec<u8, Global>>), Global>), Global>, StateVersion)> for TrieBackend<GenericMemoryDB<H, KF>, H>where
H::Out: Codec + Ord,
KF: KeyFunction<H> + Send + Sync,

fn from(
(inner, state_version): (Vec<(Option<ChildInfo>, StorageCollection)>, StateVersion)
) -> Self

Converts to this type from the input type.

Auto Trait Implementations§

impl<S, H, C> Unpin for TrieBackend<S, H, C>where
 C: Unpin,
 S: Unpin,
 <H as Hasher>::Out: Unpin,

impl<S, H, C = LocalTrieCache<H>> !UnwindSafe for TrieBackend<S, H, C>

Blanket Implementations§

impl<T> Any for Twhere
T: 'static + ?Sized,

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Gets the TypeId of self. Read more

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T: ?Sized,

const: unstable · source§

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T: ?Sized,

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T: Any,

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Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

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fn __clone_box(&self, _: Private) -> *mut ()

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Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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type Init = T

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