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

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<Item = Vec<StorageKey, Global>, Error = Error> + Send + 'static, Global>;

    fn storage_keys_paged(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        prefix: Option<StorageKey>, 
        count: u32, 
        start_key: Option<StorageKey>, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Item = Vec<StorageKey, Global>, Error = Error> + Send + 'static, Global>;

    fn storage(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        key: StorageKey, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Item = Option<StorageData>, Error = Error> + Send + 'static, Global>;

    fn storage_hash(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        key: StorageKey, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Item = Option<Hash>, Error = Error> + Send + 'static, Global>;

    fn storage_size(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        key: StorageKey, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Item = Option<u64>, Error = Error> + Send + 'static, Global>;

    fn read_child_proof(
        &self, 
        child_storage_key: PrefixedStorageKey, 
        keys: Vec<StorageKey, Global>, 
        hash: Option<Hash>
    ) -> Box<dyn Future<Item = ReadProof<Hash>, Error = Error> + Send + 'static, Global>;

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

Substrate child state API

Note that all PrefixedStorageKey are deserialized from json and not guaranteed valid.

Associated Types

RPC Metadata

Required methods

DEPRECATED: Please use childstate_getKeysPaged with proper paging support. Returns the keys with prefix from a child storage, leave empty to get all the keys

Returns the keys with prefix from a child storage with pagination support. Up to count keys will be returned. If start_key is passed, return next keys in storage in lexicographic order.

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.

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

Provided methods

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

Implementors