Trait sc_rpc::state::ChildStateApi

source · [−]
pub trait ChildStateApi<Hash>: 'static + Send + Sync {
    type Metadata: Metadata;
    fn storage_keys(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        prefix: StorageKey, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Error = Error, Item = Vec<StorageKey, Global>> + Send + 'static, Global>ⓘNotable traits for Box<R, Global>impl<R> Read for Box<R, Global> where
    R: Read + ?Sized, impl<W> Write for Box<W, Global> where
    W: Write + ?Sized, impl<I, A> Iterator for Box<I, A> where
    I: Iterator + ?Sized,
    A: Allocator,     type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where
    F: Future + Unpin + ?Sized,
    A: Allocator + 'static,     type Output = <F as Future>::Output;;

    fn storage(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        key: StorageKey, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Error = Error, Item = Option<StorageData>> + Send + 'static, Global>ⓘNotable traits for Box<R, Global>impl<R> Read for Box<R, Global> where
    R: Read + ?Sized, impl<W> Write for Box<W, Global> where
    W: Write + ?Sized, impl<I, A> Iterator for Box<I, A> where
    I: Iterator + ?Sized,
    A: Allocator,     type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where
    F: Future + Unpin + ?Sized,
    A: Allocator + 'static,     type Output = <F as Future>::Output;;

    fn storage_hash(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        key: StorageKey, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Error = Error, Item = Option<Hash>> + Send + 'static, Global>ⓘNotable traits for Box<R, Global>impl<R> Read for Box<R, Global> where
    R: Read + ?Sized, impl<W> Write for Box<W, Global> where
    W: Write + ?Sized, impl<I, A> Iterator for Box<I, A> where
    I: Iterator + ?Sized,
    A: Allocator,     type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where
    F: Future + Unpin + ?Sized,
    A: Allocator + 'static,     type Output = <F as Future>::Output;;

    fn storage_size(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        key: StorageKey, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Error = Error, Item = Option<u64>> + Send + 'static, Global>ⓘNotable traits for Box<R, Global>impl<R> Read for Box<R, Global> where
    R: Read + ?Sized, impl<W> Write for Box<W, Global> where
    W: Write + ?Sized, impl<I, A> Iterator for Box<I, A> where
    I: Iterator + ?Sized,
    A: Allocator,     type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where
    F: Future + Unpin + ?Sized,
    A: Allocator + 'static,     type Output = <F as Future>::Output;;

    fn to_delegate(self) -> IoDelegate<Self, Self::Metadata>
    where
        Hash: 'static + Send + Sync + Serialize + DeserializeOwned,
    { ... }
}
Expand description

Substrate child state API

Note that all PrefixedStorageKey are desierialized from json and not guaranted valid.

Associated Types

RPC Metadata

Required methods

Returns the keys with prefix from a child storage, leave empty to get all the keys

Returns a child storage entry at a specific block’s state.

Returns the hash of a child storage entry at a block’s state.

Returns the size of a child storage entry at a block’s state.

Provided methods

Create an IoDelegate, wiring rpc calls to the trait methods.

Implementors