hotshot_query_service::data_source::fetching

Struct FetchingDataSource

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pub struct FetchingDataSource<Types, S, P>
where
    Types: NodeType,
{
    fetcher: Arc<Fetcher<Types, S, P>>,
    scanner: Option<BackgroundTask>,
    aggregator: Option<BackgroundTask>,
    pruner: Pruner<Types, S>,
}
Expand description

The most basic kind of data source.

A data source is constructed modularly by combining a storage implementation with a Fetcher. The former allows the query service to store the data it has persistently in an easily accessible storage medium, such as the local file system or a database. This allows it to answer queries efficiently and to maintain its state across restarts. The latter allows the query service to fetch data that is missing from its storage from an external data availability provider, such as the Tiramisu DA network or another instance of the query service.

These two components of a data source are combined in FetchingDataSource, which is the lowest level kind of data source available. It simply uses the storage implementation to fetch data when available, and fills in everything else using the fetcher. Various kinds of data sources can be constructed out of FetchingDataSource by changing the storage and fetcher implementations used, and more complex data sources can be built on top using data source combinators.

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§fetcher: Arc<Fetcher<Types, S, P>>§scanner: Option<BackgroundTask>§aggregator: Option<BackgroundTask>§pruner: Pruner<Types, S>

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impl<Types, S, P> FetchingDataSource<Types, S, P>
where Types: NodeType, Payload<Types>: QueryablePayload<Types>, Header<Types>: QueryableHeader<Types>, S: VersionedDataSource + PruneStorage + HasMetrics + MigrateTypes<Types> + 'static, for<'a> S::Transaction<'a>: UpdateAvailabilityStorage<Types> + UpdateAggregatesStorage<Types>, for<'a> S::ReadOnly<'a>: AvailabilityStorage<Types> + NodeStorage<Types> + PrunedHeightStorage + AggregatesStorage<Types>, P: AvailabilityProvider<Types>,

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pub fn builder(storage: S, provider: P) -> Builder<Types, S, P>

Build a FetchingDataSource with the given storage and provider.

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async fn new(builder: Builder<Types, S, P>) -> Result<Self>

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pub fn inner(&self) -> Arc<S>

Get a copy of the (shared) inner storage

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impl<Types: NodeType, P> FetchingDataSource<Types, FileSystemStorage<Types>, P>
where Payload<Types>: QueryablePayload<Types>, Header<Types>: QueryableHeader<Types>, P: AvailabilityProvider<Types>,

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pub async fn create(path: &Path, provider: P) -> Result<Self>

Create a new FileSystemDataSource with storage at path.

If there is already data at path, it will be archived.

The FileSystemDataSource will manage its own persistence synchronization.

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pub async fn open(path: &Path, provider: P) -> Result<Self>

Open an existing FileSystemDataSource from storage at path.

If there is no data at path, a new store will be created.

The FileSystemDataSource will manage its own persistence synchronization.

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pub async fn create_with_store( loader: &mut AtomicStoreLoader, provider: P, ) -> Result<Self>

Create a new FileSystemDataSource using a persistent storage loader.

If there is existing data corresponding to the FileSystemDataSource data structures, it will be archived.

The FileSystemDataSource will register its persistent data structures with loader. The caller is responsible for creating an AtomicStore from loader and managing synchronization of the store.

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pub async fn open_with_store( loader: &mut AtomicStoreLoader, provider: P, ) -> Result<Self>

Open an existing FileSystemDataSource using a persistent storage loader.

If there is no existing data corresponding to the FileSystemDataSource data structures, a new store will be created.

The FileSystemDataSource will register its persistent data structures with loader. The caller is responsible for creating an AtomicStore from loader and managing synchronization of the store.

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pub async fn skip_version(&self) -> Result<()>

Advance the version of the persistent store without committing changes to persistent state.

This function is useful when the AtomicStore synchronizing storage for this FileSystemDataSource is being managed by the caller. The caller may want to persist some changes to other modules whose state is managed by the same AtomicStore. In order to call AtomicStore::commit_version, the version of this FileSystemDataSource must be advanced, either by commit or, if there are no outstanding changes, skip_version.

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impl<Types, P: AvailabilityProvider<Types>> FetchingDataSource<Types, SqlStorage, P>
where Types: NodeType, Header<Types>: QueryableHeader<Types>, Payload<Types>: QueryablePayload<Types>,

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pub async fn connect( config: Config, provider: P, ) -> Result<Builder<Types, P>, Error>

Connect to a remote database.

This function returns a fetching::Builder which can be used to set options on the underlying FetchingDataSource, before constructing the SqlDataSource with build. For a convenient constructor that uses the default fetching options, see Config::connect.

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impl<Types, S, P> AsRef<S> for FetchingDataSource<Types, S, P>
where Types: NodeType,

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fn as_ref(&self) -> &S

Converts this type into a shared reference of the (usually inferred) input type.
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impl<Types, S, P> AvailabilityDataSource<Types> for FetchingDataSource<Types, S, P>
where Types: NodeType, Header<Types>: QueryableHeader<Types>, Payload<Types>: QueryablePayload<Types>, S: VersionedDataSource + 'static, for<'a> S::Transaction<'a>: UpdateAvailabilityStorage<Types>, for<'a> S::ReadOnly<'a>: AvailabilityStorage<Types> + NodeStorage<Types> + PrunedHeightStorage, P: AvailabilityProvider<Types>,

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fn get_leaf<'life0, 'async_trait, ID>( &'life0 self, id: ID, ) -> Pin<Box<dyn Future<Output = Fetch<LeafQueryData<Types>>> + Send + 'async_trait>>
where ID: Into<LeafId<Types>> + Send + Sync + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_header<'life0, 'async_trait, ID>( &'life0 self, id: ID, ) -> Pin<Box<dyn Future<Output = Fetch<Header<Types>>> + Send + 'async_trait>>
where ID: Into<BlockId<Types>> + Send + Sync + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_block<'life0, 'async_trait, ID>( &'life0 self, id: ID, ) -> Pin<Box<dyn Future<Output = Fetch<BlockQueryData<Types>>> + Send + 'async_trait>>
where ID: Into<BlockId<Types>> + Send + Sync + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_payload<'life0, 'async_trait, ID>( &'life0 self, id: ID, ) -> Pin<Box<dyn Future<Output = Fetch<PayloadQueryData<Types>>> + Send + 'async_trait>>
where ID: Into<BlockId<Types>> + Send + Sync + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_payload_metadata<'life0, 'async_trait, ID>( &'life0 self, id: ID, ) -> Pin<Box<dyn Future<Output = Fetch<PayloadMetadata<Types>>> + Send + 'async_trait>>
where ID: Into<BlockId<Types>> + Send + Sync + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_vid_common<'life0, 'async_trait, ID>( &'life0 self, id: ID, ) -> Pin<Box<dyn Future<Output = Fetch<VidCommonQueryData<Types>>> + Send + 'async_trait>>
where ID: Into<BlockId<Types>> + Send + Sync + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_vid_common_metadata<'life0, 'async_trait, ID>( &'life0 self, id: ID, ) -> Pin<Box<dyn Future<Output = Fetch<VidCommonMetadata<Types>>> + Send + 'async_trait>>
where ID: Into<BlockId<Types>> + Send + Sync + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_leaf_range<'life0, 'async_trait, R>( &'life0 self, range: R, ) -> Pin<Box<dyn Future<Output = FetchStream<LeafQueryData<Types>>> + Send + 'async_trait>>
where R: RangeBounds<usize> + Send + 'static + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_block_range<'life0, 'async_trait, R>( &'life0 self, range: R, ) -> Pin<Box<dyn Future<Output = FetchStream<BlockQueryData<Types>>> + Send + 'async_trait>>
where R: RangeBounds<usize> + Send + 'static + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_header_range<'life0, 'async_trait, R>( &'life0 self, range: R, ) -> Pin<Box<dyn Future<Output = FetchStream<Header<Types>>> + Send + 'async_trait>>
where R: RangeBounds<usize> + Send + 'static + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_payload_range<'life0, 'async_trait, R>( &'life0 self, range: R, ) -> Pin<Box<dyn Future<Output = FetchStream<PayloadQueryData<Types>>> + Send + 'async_trait>>
where R: RangeBounds<usize> + Send + 'static + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_payload_metadata_range<'life0, 'async_trait, R>( &'life0 self, range: R, ) -> Pin<Box<dyn Future<Output = FetchStream<PayloadMetadata<Types>>> + Send + 'async_trait>>
where R: RangeBounds<usize> + Send + 'static + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_vid_common_range<'life0, 'async_trait, R>( &'life0 self, range: R, ) -> Pin<Box<dyn Future<Output = FetchStream<VidCommonQueryData<Types>>> + Send + 'async_trait>>
where R: RangeBounds<usize> + Send + 'static + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_vid_common_metadata_range<'life0, 'async_trait, R>( &'life0 self, range: R, ) -> Pin<Box<dyn Future<Output = FetchStream<VidCommonMetadata<Types>>> + Send + 'async_trait>>
where R: RangeBounds<usize> + Send + 'static + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn get_leaf_range_rev<'life0, 'async_trait>( &'life0 self, start: Bound<usize>, end: usize, ) -> Pin<Box<dyn Future<Output = FetchStream<LeafQueryData<Types>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn get_block_range_rev<'life0, 'async_trait>( &'life0 self, start: Bound<usize>, end: usize, ) -> Pin<Box<dyn Future<Output = FetchStream<BlockQueryData<Types>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn get_payload_range_rev<'life0, 'async_trait>( &'life0 self, start: Bound<usize>, end: usize, ) -> Pin<Box<dyn Future<Output = FetchStream<PayloadQueryData<Types>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn get_payload_metadata_range_rev<'life0, 'async_trait>( &'life0 self, start: Bound<usize>, end: usize, ) -> Pin<Box<dyn Future<Output = FetchStream<PayloadMetadata<Types>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn get_vid_common_range_rev<'life0, 'async_trait>( &'life0 self, start: Bound<usize>, end: usize, ) -> Pin<Box<dyn Future<Output = FetchStream<VidCommonQueryData<Types>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn get_vid_common_metadata_range_rev<'life0, 'async_trait>( &'life0 self, start: Bound<usize>, end: usize, ) -> Pin<Box<dyn Future<Output = FetchStream<VidCommonMetadata<Types>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn get_block_containing_transaction<'life0, 'async_trait>( &'life0 self, h: TransactionHash<Types>, ) -> Pin<Box<dyn Future<Output = Fetch<BlockWithTransaction<Types>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn get_state_cert<'life0, 'async_trait>( &'life0 self, epoch: u64, ) -> Pin<Box<dyn Future<Output = Fetch<StateCertQueryDataV2<Types>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn subscribe_blocks<'life0, 'async_trait>( &'life0 self, from: usize, ) -> Pin<Box<dyn Future<Output = BoxStream<'static, BlockQueryData<Types>>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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fn subscribe_payloads<'life0, 'async_trait>( &'life0 self, from: usize, ) -> Pin<Box<dyn Future<Output = BoxStream<'static, PayloadQueryData<Types>>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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fn subscribe_payload_metadata<'life0, 'async_trait>( &'life0 self, from: usize, ) -> Pin<Box<dyn Future<Output = BoxStream<'static, PayloadMetadata<Types>>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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fn subscribe_leaves<'life0, 'async_trait>( &'life0 self, from: usize, ) -> Pin<Box<dyn Future<Output = BoxStream<'static, LeafQueryData<Types>>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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fn subscribe_headers<'life0, 'async_trait>( &'life0 self, from: usize, ) -> Pin<Box<dyn Future<Output = BoxStream<'static, Header<Types>>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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fn subscribe_vid_common<'life0, 'async_trait>( &'life0 self, from: usize, ) -> Pin<Box<dyn Future<Output = BoxStream<'static, VidCommonQueryData<Types>>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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fn subscribe_vid_common_metadata<'life0, 'async_trait>( &'life0 self, from: usize, ) -> Pin<Box<dyn Future<Output = BoxStream<'static, VidCommonMetadata<Types>>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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impl<Types, S, P> Clone for FetchingDataSource<Types, S, P>
where Types: NodeType,

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<Types, S, P> Debug for FetchingDataSource<Types, S, P>
where Types: NodeType, S: Debug, P: Debug,

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

Formats the value using the given formatter. Read more
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impl<Types, S, P> ExplorerDataSource<Types> for FetchingDataSource<Types, S, P>
where Types: NodeType, Payload<Types>: QueryablePayload<Types>, Header<Types>: QueryableHeader<Types> + ExplorerHeader<Types>, Transaction<Types>: ExplorerTransaction<Types>, S: VersionedDataSource + 'static, for<'a> S::ReadOnly<'a>: ExplorerStorage<Types>, P: Send + Sync,

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fn get_block_summaries<'life0, 'async_trait>( &'life0 self, request: GetBlockSummariesRequest<Types>, ) -> Pin<Box<dyn Future<Output = Result<Vec<BlockSummary<Types>>, GetBlockSummariesError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

get_block_summaries is a method that retrieves a list of block summaries from the blockchain. The list is generated from the given GetBlockSummariesRequest.
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fn get_block_detail<'life0, 'async_trait>( &'life0 self, request: BlockIdentifier<Types>, ) -> Pin<Box<dyn Future<Output = Result<BlockDetail<Types>, GetBlockDetailError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

get_block_detail is a method that retrieves the details of a specific block from the blockchain. The block is identified by the given BlockIdentifier.
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fn get_transaction_summaries<'life0, 'async_trait>( &'life0 self, request: GetTransactionSummariesRequest<Types>, ) -> Pin<Box<dyn Future<Output = Result<Vec<TransactionSummary<Types>>, GetTransactionSummariesError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

get_transaction_summaries is a method that retrieves a list of transaction summaries from the blockchain. The list is generated from the given GetTransactionSummariesRequest.
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fn get_transaction_detail<'life0, 'async_trait>( &'life0 self, request: TransactionIdentifier<Types>, ) -> Pin<Box<dyn Future<Output = Result<TransactionDetailResponse<Types>, GetTransactionDetailError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

get_transaction_detail is a method that retrieves the details of a specific transaction from the blockchain. The transaction is identified by the given TransactionIdentifier.
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fn get_explorer_summary<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<ExplorerSummary<Types>, GetExplorerSummaryError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

get_explorer_summary is a method that retrieves a summary overview of the blockchain. This is useful for displaying information that indicates the overall status of the block chain.
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fn get_search_results<'life0, 'async_trait>( &'life0 self, query: TaggedBase64, ) -> Pin<Box<dyn Future<Output = Result<SearchResult<Types>, GetSearchResultsError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

get_search_results is a method that retrieves the results of a search query against the blockchain. The results are generated from the given query string.
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impl<Types, S, P> HasMetrics for FetchingDataSource<Types, S, P>
where Types: NodeType, S: HasMetrics,

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fn metrics(&self) -> &PrometheusMetrics

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impl<Types, S, P, State, const ARITY: usize> MerklizedStateDataSource<Types, State, ARITY> for FetchingDataSource<Types, S, P>
where Types: NodeType, S: VersionedDataSource + 'static, for<'a> S::ReadOnly<'a>: MerklizedStateStorage<Types, State, ARITY>, P: Send + Sync, State: MerklizedState<Types, ARITY> + 'static, <State as MerkleTreeScheme>::Commitment: Send,

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fn get_path<'life0, 'async_trait>( &'life0 self, snapshot: Snapshot<Types, State, ARITY>, key: State::Key, ) -> Pin<Box<dyn Future<Output = QueryResult<MerkleProof<State::Entry, State::Key, State::T, ARITY>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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impl<Types, S, P> MerklizedStateHeightPersistence for FetchingDataSource<Types, S, P>
where Types: NodeType, Header<Types>: QueryableHeader<Types>, Payload<Types>: QueryablePayload<Types>, S: VersionedDataSource + 'static, for<'a> S::ReadOnly<'a>: MerklizedStateHeightStorage, P: Send + Sync,

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fn get_last_state_height<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = QueryResult<usize>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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impl<Types, S, P> NodeDataSource<Types> for FetchingDataSource<Types, S, P>
where Types: NodeType, Header<Types>: QueryableHeader<Types>, S: VersionedDataSource + 'static, for<'a> S::ReadOnly<'a>: NodeStorage<Types>, P: Send + Sync,

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fn block_height<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = QueryResult<usize>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn count_transactions_in_range<'life0, 'async_trait>( &'life0 self, range: impl 'async_trait + RangeBounds<usize> + Send, namespace: Option<NamespaceId<Types>>, ) -> Pin<Box<dyn Future<Output = QueryResult<usize>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn payload_size_in_range<'life0, 'async_trait>( &'life0 self, range: impl 'async_trait + RangeBounds<usize> + Send, namespace: Option<NamespaceId<Types>>, ) -> Pin<Box<dyn Future<Output = QueryResult<usize>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn vid_share<'life0, 'async_trait, ID>( &'life0 self, id: ID, ) -> Pin<Box<dyn Future<Output = QueryResult<VidShare>> + Send + 'async_trait>>
where ID: Into<BlockId<Types>> + Send + Sync + 'async_trait, Self: 'async_trait, 'life0: 'async_trait,

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fn sync_status<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = QueryResult<SyncStatus>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Search the database for missing objects and generate a report.
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fn get_header_window<'life0, 'async_trait>( &'life0 self, start: impl 'async_trait + Into<WindowStart<Types>> + Send + Sync, end: u64, limit: usize, ) -> Pin<Box<dyn Future<Output = QueryResult<TimeWindowQueryData<Header<Types>>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn count_transactions<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = QueryResult<usize>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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fn payload_size<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = QueryResult<usize>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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impl<Types, S, P> PrunedHeightDataSource for FetchingDataSource<Types, S, P>
where Types: NodeType, S: VersionedDataSource + HasMetrics + Send + Sync + 'static, for<'a> S::ReadOnly<'a>: PrunedHeightStorage, P: Send + Sync,

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fn load_pruned_height<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<Option<u64>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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impl<Types, S, P> StatusDataSource for FetchingDataSource<Types, S, P>
where Types: NodeType, Header<Types>: QueryableHeader<Types>, S: VersionedDataSource + HasMetrics + Send + Sync + 'static, for<'a> S::ReadOnly<'a>: NodeStorage<Types>, P: Send + Sync,

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fn block_height<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = QueryResult<usize>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

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fn consensus_metrics(&self) -> QueryResult<PrometheusMetrics>

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fn elapsed_time_since_last_decide<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = QueryResult<u64>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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fn success_rate<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = QueryResult<f64>> + Send + 'async_trait>>
where Self: Sync + 'async_trait, 'life0: 'async_trait,

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impl<Types, S, P> UpdateAvailabilityData<Types> for FetchingDataSource<Types, S, P>
where Types: NodeType, Header<Types>: QueryableHeader<Types>, Payload<Types>: QueryablePayload<Types>, S: VersionedDataSource + 'static, for<'a> S::Transaction<'a>: UpdateAvailabilityStorage<Types>, for<'a> S::ReadOnly<'a>: AvailabilityStorage<Types> + NodeStorage<Types> + PrunedHeightStorage, P: AvailabilityProvider<Types>,

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async fn append(&self, info: BlockInfo<Types>) -> Result<()>

Append information about a new block to the database.
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impl<Types, S, P> VersionedDataSource for FetchingDataSource<Types, S, P>
where Types: NodeType, S: VersionedDataSource + Send + Sync, P: Send + Sync,

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type Transaction<'a> = <S as VersionedDataSource>::Transaction<'a> where Self: 'a

A transaction which can read and modify the data source.
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type ReadOnly<'a> = <S as VersionedDataSource>::ReadOnly<'a> where Self: 'a

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async fn write(&self) -> Result<Self::Transaction<'_>>

Start an atomic transaction on the data source.
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async fn read(&self) -> Result<Self::ReadOnly<'_>>

Start a read-only transaction on the data source. Read more

Auto Trait Implementations§

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impl<Types, S, P> Freeze for FetchingDataSource<Types, S, P>

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impl<Types, S, P> !RefUnwindSafe for FetchingDataSource<Types, S, P>

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impl<Types, S, P> Send for FetchingDataSource<Types, S, P>
where S: Sync + Send, P: Sync + Send,

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impl<Types, S, P> Sync for FetchingDataSource<Types, S, P>
where S: Sync + Send, P: Sync + Send,

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impl<Types, S, P> Unpin for FetchingDataSource<Types, S, P>
where Types: Unpin, S: Unpin,

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impl<Types, S, P> !UnwindSafe for FetchingDataSource<Types, S, P>

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> ArchivePointee for T

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type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.
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fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.
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impl<'a, T, E> AsTaggedExplicit<'a, E> for T
where T: 'a,

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fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

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impl<'a, T, E> AsTaggedImplicit<'a, E> for T
where T: 'a,

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fn implicit( self, class: Class, constructed: bool, tag: u32, ) -> TaggedParser<'a, Implicit, Self, E>

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

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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,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<F, W, T, D> Deserialize<With<T, W>, D> for F
where W: DeserializeWith<F, T, D>, D: Fallible + ?Sized, F: ?Sized,

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fn deserialize( &self, deserializer: &mut D, ) -> Result<With<T, W>, <D as Fallible>::Error>

Deserializes using the given deserializer
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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> DynClone for T
where T: Clone,

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

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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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impl<T> From<T> for T

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

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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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> LayoutRaw for T

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fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>

Gets the layout of the type.
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impl<T> Pipe for T
where T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R
where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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fn pipe_borrow_mut<'a, B, R>( &'a mut self, func: impl FnOnce(&'a mut B) -> R, ) -> R
where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R
where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R, ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Pointee for T

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type Metadata = ()

The type for metadata in pointers and references to Self.
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impl<T> PolicyExt for T
where T: ?Sized,

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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] only if self and other return Action::Follow. Read more
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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] if either self or other returns Action::Follow. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<Types, T> UpdateDataSource<Types> for T
where Types: NodeType, T: UpdateAvailabilityData<Types> + Send + Sync, <Types as NodeType>::BlockHeader: QueryableHeader<Types>, <Types as NodeType>::BlockPayload: QueryablePayload<Types>,

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fn update<'life0, 'life1, 'async_trait>( &'life0 self, event: &'life1 Event<Types>, ) -> Pin<Box<dyn Future<Output = Result<(), u64>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, T: 'async_trait,

Update query state based on a new consensus event. Read more
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impl<T> UpdateStatusData for T
where T: StatusDataSource,

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fn populate_metrics(&self) -> Box<dyn Metrics>

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

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fn vzip(self) -> V

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impl<T> WithSubscriber for 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
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impl<T> WithSubscriber for 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
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impl<T> ErasedDestructor for T
where T: 'static,