Struct sc_client_db::Backend

source · [−]

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

Expand description

Disk backend.

Disk backend keeps data in a key-value store. In archive mode, trie nodes are kept from all blocks. Otherwise, trie nodes are kept only from some recent blocks.

Implementations

impl<Block: BlockT> Backend<Block>

pub fn new(
config: DatabaseSettings,
canonicalization_delay: u64
) -> ClientResult<Self>

Create a new instance of database backend.

The pruning window is how old a block must be before the state is pruned.

Trait Implementations

impl<Block> AuxStore for Backend<Block> where
Block: BlockT,

fn insert_aux<'a, 'b: 'a, 'c: 'a, I: IntoIterator<Item = &'a (&'c [u8 ], &'c [u8 ])>, D: IntoIterator<Item = &'a &'b [u8 ]>>(
    &self,
    insert: I,
    delete: D
) -> ClientResult<()>

Insert auxiliary data into key-value store. Read more

fn get_aux(&self, key: &[u8 ]) -> ClientResult<Option<Vec<u8>>>

Query auxiliary data from key-value store.

impl<Block: BlockT> Backend<Block> for Backend<Block>

type BlockImportOperation = BlockImportOperation<Block>

Associated block insertion operation type.

type Blockchain = BlockchainDb<Block>

Associated blockchain backend type.

type State = SyncingCachingState<RefTrackingState<Block>, Block>

Associated state backend type.

type OffchainStorage = LocalStorage

Offchain workers local storage.

fn begin_operation(&self) -> ClientResult<Self::BlockImportOperation>

Begin a new block insertion transaction with given parent block id. Read more

fn begin_state_operation(
    &self,
    operation: &mut Self::BlockImportOperation,
    block: BlockId<Block>
) -> ClientResult<()>

Note an operation to contain state transition.

fn commit_operation(
&self,
operation: Self::BlockImportOperation
) -> ClientResult<()>

Commit block insertion.

fn finalize_block(
    &self,
    block: BlockId<Block>,
    justification: Option<Justification>
) -> ClientResult<()>

Finalize block with given Id. Read more

fn changes_trie_storage(
&self
) -> Option<&dyn PrunableStateChangesTrieStorage<Block>>

Returns reference to changes trie storage.

fn offchain_storage(&self) -> Option<Self::OffchainStorage>

Returns a handle to offchain storage.

fn usage_info(&self) -> Option<UsageInfo>

Returns current usage statistics.

fn revert(
    &self,
    n: NumberFor<Block>,
    revert_finalized: bool
) -> ClientResult<(NumberFor<Block>, HashSet<Block::Hash>)>

Attempts to revert the chain by n blocks. If revert_finalized is set it will attempt to revert past any finalized block, this is unsafe and can potentially leave the node in an inconsistent state. Read more

fn blockchain(&self) -> &BlockchainDb<Block>

Returns reference to blockchain backend.

fn state_at(&self, block: BlockId<Block>) -> ClientResult<Self::State>

Returns state backend with post-state of given block.

fn have_state_at(&self, hash: &Block::Hash, number: NumberFor<Block>) -> bool

Returns true if state for given block is available.

fn get_import_lock(&self) -> &RwLock<()>

Gain access to the import lock around this backend. Read more

fn insert_aux<'a, 'b, 'c, I, D>(
    &self,
    insert: I,
    delete: D
) -> Result<(), Error> where
    'b: 'a,
    'c: 'a,
    I: IntoIterator<Item = &'a (&'c [u8 ], &'c [u8 ])>,
    D: IntoIterator<Item = &'a &'b [u8 ]>,

Insert auxiliary data into key-value store.

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

Query auxiliary data from key-value store.

impl<Block: BlockT> LocalBackend<Block> for Backend<Block>

Auto Trait Implementations

impl<Block> !RefUnwindSafe for Backend<Block>

impl<Block> Send for Backend<Block>

impl<Block> Sync for Backend<Block>

impl<Block> Unpin for Backend<Block> where
<Block as Block>::Hash: Unpin,
<<Block as Block>::Header as Header>::Number: Unpin,

impl<Block> !UnwindSafe for Backend<Block>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CheckedConversion for T

fn checked_from<T>(t: T) -> Option<Self> where
Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more

fn checked_into<T>(self) -> Option<T> where
Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more

impl<T> From<T> for T

const: unstable · source

pub fn from(t: T) -> T

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

fn in_current_span(self) -> Instrumented<Self>

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

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

fn in_current_span(self) -> Instrumented<Self>

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

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

pub fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T, Outer> IsWrappedBy<Outer> for T where
Outer: AsRef<T> + AsMut<T> + From<T>,
T: From<Outer>,

pub fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

pub fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

impl<T> Pointable for T

pub const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

pub unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

pub unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

pub unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> SaturatedConversion for T

fn saturated_from<T>(t: T) -> Self where
Self: UniqueSaturatedFrom<T>,

Convert from a value of T into an equivalent instance of Self. Read more

fn saturated_into<T>(self) -> T where
Self: UniqueSaturatedInto<T>,

Consume self to return an equivalent value of T. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<S, T> UncheckedInto<T> for S where
T: UncheckedFrom<S>,

pub fn unchecked_into(self) -> T

The counterpart to unchecked_from.

impl<T, S> UniqueSaturatedInto<T> for S where
T: Bounded,
S: TryInto<T>,

pub fn unique_saturated_into(self) -> T

Consume self to return an equivalent value of T.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

pub fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

impl<T> Erased for T