Trait sc_rpc::state::ChildStateBackend[−][src]

pub trait ChildStateBackend<Block: BlockT, Client>: Send + Sync + 'static where
    Block: BlockT + 'static,
    Client: Send + Sync + 'static, {
    fn read_child_proof(
        &self, 
        block: Option<Block::Hash>, 
        storage_key: PrefixedStorageKey, 
        keys: Vec<StorageKey>
    ) -> FutureResult<ReadProof<Block::Hash>>;

    fn storage_keys(
        &self, 
        block: Option<Block::Hash>, 
        storage_key: PrefixedStorageKey, 
        prefix: StorageKey
    ) -> FutureResult<Vec<StorageKey>>;

    fn storage_keys_paged(
        &self, 
        block: Option<Block::Hash>, 
        storage_key: PrefixedStorageKey, 
        prefix: Option<StorageKey>, 
        count: u32, 
        start_key: Option<StorageKey>
    ) -> FutureResult<Vec<StorageKey>>;

    fn storage(
        &self, 
        block: Option<Block::Hash>, 
        storage_key: PrefixedStorageKey, 
        key: StorageKey
    ) -> FutureResult<Option<StorageData>>;

    fn storage_hash(
        &self, 
        block: Option<Block::Hash>, 
        storage_key: PrefixedStorageKey, 
        key: StorageKey
    ) -> FutureResult<Option<Block::Hash>>;

    fn storage_size(
        &self, 
        block: Option<Block::Hash>, 
        storage_key: PrefixedStorageKey, 
        key: StorageKey
    ) -> FutureResult<Option<u64>> { ... }
}
Expand description

Child state backend API.

Required methods

Returns proof of storage for a child key entries at a specific block’s state.

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

Returns the keys with prefix from a child storage with pagination support.

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

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

Provided methods

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

Implementors