Struct sc_light::backend::Backend

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pub struct Backend<S, H: Hasher> { /* private fields */ }

Expand description

Light client backend.

Implementations

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impl<S, H: Hasher> Backend<S, H>

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pub fn new(blockchain: Arc<Blockchain<S>>) -> Self

Create new light backend.

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pub fn blockchain(&self) -> &Arc<Blockchain<S>>

Get shared blockchain reference.

Trait Implementations

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impl<S: AuxStore, H: Hasher> AuxStore for Backend<S, H>

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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

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

Query auxiliary data from key-value store.

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impl<S, Block> Backend<Block> for Backend<S, HashFor<Block>> where
 Block: BlockT,
 S: BlockchainStorage<Block>,
 Block::Hash: Ord,

type BlockImportOperation = ImportOperation<Block, S>

Associated block insertion operation type.

type Blockchain = Blockchain<S>

Associated blockchain backend type.

type State = GenesisOrUnavailableState<HashFor<Block>>

Associated state backend type.

type OffchainStorage = InMemOffchainStorage

Offchain workers local storage.

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

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

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

Note an operation to contain state transition.

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

Commit block insertion.

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

Finalize block with given Id. Read more

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fn blockchain(&self) -> &Blockchain<S>

Returns reference to blockchain backend.

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

Returns current usage statistics.

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

Returns reference to changes trie storage.

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

Returns a handle to offchain storage.

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

Returns state backend with post-state of given block.

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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

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

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

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fn have_state_at(
 &self,
 hash: &<Block as Block>::Hash,
 _number: <<Block as Block>::Header as Header>::Number
) -> bool

Returns true if state for given block is available.

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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.

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

Query auxiliary data from key-value store.

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impl<S, Block> RemoteBackend<Block> for Backend<S, HashFor<Block>> where
 Block: BlockT,
 S: BlockchainStorage<Block> + 'static,
 Block::Hash: Ord,

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fn is_local_state_available(&self, block: &BlockId<Block>) -> bool

Returns true if the state for given block is available locally.

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fn remote_blockchain(&self) -> Arc<dyn RemoteBlockchain<Block>>

Returns reference to blockchain backend. Read more

Auto Trait Implementations

impl<S, H> !RefUnwindSafe for Backend<S, H>

impl<S, H> Send for Backend<S, H> where
S: Send + Sync,

impl<S, H> Sync for Backend<S, H> where
S: Send + Sync,

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

impl<S, H> UnwindSafe for Backend<S, H> where
 H: UnwindSafe,
 S: RefUnwindSafe,
 <H as Hasher>::Out: UnwindSafe,

Blanket Implementations

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

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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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

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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

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impl<T> CheckedConversion for T

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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

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

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

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impl<T> From<T> for T

const: unstable · source

pub fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

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

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fn in_current_span(self) -> Instrumented<Self>

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

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impl<T> Instrument for T

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

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

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fn in_current_span(self) -> Instrumented<Self>

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

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impl<T, U> Into 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.

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

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

Get a reference to the inner from the outer.

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

Get a mutable reference to the inner from the outer.

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impl<T> Pointable for T

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pub const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

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

Initializes a with the given initializer. Read more

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

Dereferences the given pointer. Read more

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

Mutably dereferences the given pointer. Read more

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pub unsafe fn drop(ptr: usize)

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

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impl<T> Same<T> for T

type Output = T

Should always be Self

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impl<T> SaturatedConversion for T

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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

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

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

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impl<T, U> TryFrom 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>::Error>

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

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

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pub fn unchecked_into(self) -> T

The counterpart to unchecked_from.

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

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pub fn unique_saturated_into(self) -> T

Consume self to return an equivalent value of T.

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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

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fn with_current_subscriber(self) -> WithDispatch<Self>

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

Struct sc_light::backend::Backend

Implementations

impl<S, H: Hasher> Backend<S, H>

pub fn new(blockchain: Arc<Blockchain<S>>) -> Self

pub fn blockchain(&self) -> &Arc<Blockchain<S>>

Trait Implementations

impl<S: AuxStore, H: Hasher> AuxStore for Backend<S, H>

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<()>

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

impl<S, Block> Backend<Block> for Backend<S, HashFor<Block>> where Block: BlockT, S: BlockchainStorage<Block>, Block::Hash: Ord,

type BlockImportOperation = ImportOperation<Block, S>

type Blockchain = Blockchain<S>

type State = GenesisOrUnavailableState<HashFor<Block>>

type OffchainStorage = InMemOffchainStorage

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

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

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

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

fn blockchain(&self) -> &Blockchain<S>

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

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

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

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

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

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

fn have_state_at( &self, hash: &<Block as Block>::Hash, _number: <<Block as Block>::Header as Header>::Number) -> bool

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]>,

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

impl<S, Block> RemoteBackend<Block> for Backend<S, HashFor<Block>> where Block: BlockT, S: BlockchainStorage<Block> + 'static, Block::Hash: Ord,

fn is_local_state_available(&self, block: &BlockId<Block>) -> bool

fn remote_blockchain(&self) -> Arc<dyn RemoteBlockchain<Block>>

Auto Trait Implementations

impl<S, H> !RefUnwindSafe for Backend<S, H>

impl<S, H> Send for Backend<S, H> where S: Send + Sync,

impl<S, H> Sync for Backend<S, H> where S: Send + Sync,

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

impl<S, H> UnwindSafe for Backend<S, H> where H: UnwindSafe, S: RefUnwindSafe, <H as Hasher>::Out: UnwindSafe,

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

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

pub fn borrow(&self) -> &T

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

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

impl<T> CheckedConversion for T

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

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

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T> Instrument for T

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

fn in_current_span(self) -> Instrumented<Self>

impl<T> Instrument for T

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

fn in_current_span(self) -> Instrumented<Self>

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

pub fn into(self) -> U

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

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

impl<T> Pointable for T

pub const ALIGN: usize

type Init = T

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

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

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

pub unsafe fn drop(ptr: usize)

impl<T> Same<T> for T

type Output = T

impl<T> SaturatedConversion for T

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

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

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

type Error = Infallible

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

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

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

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

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

pub fn unchecked_into(self) -> T

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<()>

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

impl<S, Block> Backend<Block> for Backend<S, HashFor<Block>> where
Block: BlockT,
S: BlockchainStorage<Block>,
Block::Hash: Ord,

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

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

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

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

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

fn have_state_at(
&self,
hash: &<Block as Block>::Hash,
_number: <<Block as Block>::Header as Header>::Number
) -> bool

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 ]>,

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

impl<S, Block> RemoteBackend<Block> for Backend<S, HashFor<Block>> where
Block: BlockT,
S: BlockchainStorage<Block> + 'static,
Block::Hash: Ord,

impl<S, H> Send for Backend<S, H> where
S: Send + Sync,

impl<S, H> Sync for Backend<S, H> where
S: Send + Sync,

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

impl<S, H> UnwindSafe for Backend<S, H> where
H: UnwindSafe,
S: RefUnwindSafe,
<H as Hasher>::Out: UnwindSafe,

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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