[−][src]Trait sc_client::light::fetcher::Fetcher

pub trait Fetcher<Block>: Send + Sync where
    Block: Block,
    <Self::RemoteHeaderResult as Future>::Output == Result<<Block as Block>::Header, Error>,
    <Self::RemoteReadResult as Future>::Output == Result<HashMap<Vec<u8>, Option<Vec<u8>>, RandomState>, Error>,
    <Self::RemoteCallResult as Future>::Output == Result<Vec<u8>, Error>,
    <Self::RemoteChangesResult as Future>::Output == Result<Vec<(<<Block as Block>::Header as Header>::Number, u32)>, Error>,
    <Self::RemoteBodyResult as Future>::Output == Result<Vec<<Block as Block>::Extrinsic>, Error>, {
    type RemoteHeaderResult: 'static + Send + Unpin + Future;
    type RemoteReadResult: 'static + Send + Unpin + Future;
    type RemoteCallResult: 'static + Send + Unpin + Future;
    type RemoteChangesResult: 'static + Send + Unpin + Future;
    type RemoteBodyResult: 'static + Send + Unpin + Future;
    fn remote_header(
        &self, 
        request: RemoteHeaderRequest<<Block as Block>::Header>
    ) -> Self::RemoteHeaderResult;

    fn remote_read(
        &self, 
        request: RemoteReadRequest<<Block as Block>::Header>
    ) -> Self::RemoteReadResult;

    fn remote_read_child(
        &self, 
        request: RemoteReadChildRequest<<Block as Block>::Header>
    ) -> Self::RemoteReadResult;

    fn remote_call(
        &self, 
        request: RemoteCallRequest<<Block as Block>::Header>
    ) -> Self::RemoteCallResult;

    fn remote_changes(
        &self, 
        request: RemoteChangesRequest<<Block as Block>::Header>
    ) -> Self::RemoteChangesResult;

    fn remote_body(
        &self, 
        request: RemoteBodyRequest<<Block as Block>::Header>
    ) -> Self::RemoteBodyResult;
}

Light client data fetcher. Implementations of this trait must check if remote data is correct (see FetchedDataChecker) and return already checked data.

Associated Types

type RemoteHeaderResult: 'static + Send + Unpin + Future

Remote header future.

type RemoteReadResult: 'static + Send + Unpin + Future

Remote storage read future.

type RemoteCallResult: 'static + Send + Unpin + Future

Remote call result future.

type RemoteChangesResult: 'static + Send + Unpin + Future

Remote changes result future.

type RemoteBodyResult: 'static + Send + Unpin + Future

Remote block body result future.

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Required methods

fn remote_header(
    &self,
    request: RemoteHeaderRequest<<Block as Block>::Header>
) -> Self::RemoteHeaderResult

Fetch remote header.

fn remote_read(
    &self,
    request: RemoteReadRequest<<Block as Block>::Header>
) -> Self::RemoteReadResult

Fetch remote storage value.

fn remote_read_child(
    &self,
    request: RemoteReadChildRequest<<Block as Block>::Header>
) -> Self::RemoteReadResult

Fetch remote storage child value.

fn remote_call(
    &self,
    request: RemoteCallRequest<<Block as Block>::Header>
) -> Self::RemoteCallResult

Fetch remote call result.

fn remote_changes(
    &self,
    request: RemoteChangesRequest<<Block as Block>::Header>
) -> Self::RemoteChangesResult

Fetch remote changes ((block number, extrinsic index)) where given key has been changed at a given blocks range.

fn remote_body(
    &self,
    request: RemoteBodyRequest<<Block as Block>::Header>
) -> Self::RemoteBodyResult

Fetch remote block body

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Implementors

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