Trait sc_client_api::client::BlockBackend

pub trait BlockBackend<Block: BlockT> {
    fn block_body(
        &self, 
        id: &BlockId<Block>
    ) -> Result<Option<Vec<<Block as BlockT>::Extrinsic>>>;
    fn block(&self, id: &BlockId<Block>) -> Result<Option<SignedBlock<Block>>>;
    fn block_status(&self, id: &BlockId<Block>) -> Result<BlockStatus>;
    fn justification(
        &self, 
        id: &BlockId<Block>
    ) -> Result<Option<Justification>>;
    fn block_hash(
        &self, 
        number: NumberFor<Block>
    ) -> Result<Option<Block::Hash>>;
    fn extrinsic(
        &self, 
        hash: &Block::Hash
    ) -> Result<Option<<Block as BlockT>::Extrinsic>>;

    fn have_extrinsic(&self, hash: &Block::Hash) -> Result<bool> { ... }
}

Interface for fetching block data.

Required methods

fn block_body(
    &self,
    id: &BlockId<Block>
) -> Result<Option<Vec<<Block as BlockT>::Extrinsic>>>

Get block body by ID. Returns None if the body is not stored.

fn block(&self, id: &BlockId<Block>) -> Result<Option<SignedBlock<Block>>>

Get full block by id.

fn block_status(&self, id: &BlockId<Block>) -> Result<BlockStatus>

Get block status.

fn justification(&self, id: &BlockId<Block>) -> Result<Option<Justification>>

Get block justification set by id.

fn block_hash(&self, number: NumberFor<Block>) -> Result<Option<Block::Hash>>

Get block hash by number.

fn extrinsic(
    &self,
    hash: &Block::Hash
) -> Result<Option<<Block as BlockT>::Extrinsic>>

Get single extrinsic by hash.

Provided methods

fn have_extrinsic(&self, hash: &Block::Hash) -> Result<bool>

Check if extrinsic exists.

Implementors