Trait sc_light::blockchain::BlockchainHeaderBackend

pub trait BlockchainHeaderBackend<Block>: Send + Sync where
    Block: Block, {
    pub fn header(
        &self, 
        id: BlockId<Block>
    ) -> Result<Option<<Block as Block>::Header>, Error>;
    pub fn info(&self) -> Info<Block>;
    pub fn status(&self, id: BlockId<Block>) -> Result<BlockStatus, Error>;
    pub fn number(
        &self, 
        hash: <Block as Block>::Hash
    ) -> Result<Option<<<Block as Block>::Header as Header>::Number>, Error>;
    pub fn hash(
        &self, 
        number: <<Block as Block>::Header as Header>::Number
    ) -> Result<Option<<Block as Block>::Hash>, Error>;

    pub fn block_hash_from_id(
        &self, 
        id: &BlockId<Block>
    ) -> Result<Option<<Block as Block>::Hash>, Error> { ... }
    pub fn block_number_from_id(
        &self, 
        id: &BlockId<Block>
    ) -> Result<Option<<<Block as Block>::Header as Header>::Number>, Error> { ... }
    pub fn expect_header(
        &self, 
        id: BlockId<Block>
    ) -> Result<<Block as Block>::Header, Error> { ... }
    pub fn expect_block_number_from_id(
        &self, 
        id: &BlockId<Block>
    ) -> Result<<<Block as Block>::Header as Header>::Number, Error> { ... }
    pub fn expect_block_hash_from_id(
        &self, 
        id: &BlockId<Block>
    ) -> Result<<Block as Block>::Hash, Error> { ... }
}

Blockchain database header backend. Does not perform any validation.

Required methods

pub fn header(
    &self,
    id: BlockId<Block>
) -> Result<Option<<Block as Block>::Header>, Error>

Get block header. Returns None if block is not found.

pub fn info(&self) -> Info<Block>

Get blockchain info.

pub fn status(&self, id: BlockId<Block>) -> Result<BlockStatus, Error>

Get block status.

pub fn number(
    &self,
    hash: <Block as Block>::Hash
) -> Result<Option<<<Block as Block>::Header as Header>::Number>, Error>

Get block number by hash. Returns None if the header is not in the chain.

pub fn hash(
    &self,
    number: <<Block as Block>::Header as Header>::Number
) -> Result<Option<<Block as Block>::Hash>, Error>

Get block hash by number. Returns None if the header is not in the chain.

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Provided methods

pub fn block_hash_from_id(
    &self,
    id: &BlockId<Block>
) -> Result<Option<<Block as Block>::Hash>, Error>

Convert an arbitrary block ID into a block hash.

pub fn block_number_from_id(
    &self,
    id: &BlockId<Block>
) -> Result<Option<<<Block as Block>::Header as Header>::Number>, Error>

Convert an arbitrary block ID into a block hash.

pub fn expect_header(
    &self,
    id: BlockId<Block>
) -> Result<<Block as Block>::Header, Error>

Get block header. Returns UnknownBlock error if block is not found.

pub fn expect_block_number_from_id(
    &self,
    id: &BlockId<Block>
) -> Result<<<Block as Block>::Header as Header>::Number, Error>

Convert an arbitrary block ID into a block number. Returns UnknownBlock error if block is not found.

pub fn expect_block_hash_from_id(
    &self,
    id: &BlockId<Block>
) -> Result<<Block as Block>::Hash, Error>

Convert an arbitrary block ID into a block hash. Returns UnknownBlock error if block is not found.

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Implementations on Foreign Types

impl<Block> HeaderBackend<Block> for Blockchain<Block> where
    Block: Block, 

pub fn header(
    &self,
    id: BlockId<Block>
) -> Result<Option<<Block as Block>::Header>, Error>

pub fn info(&self) -> Info<Block>

pub fn status(&self, id: BlockId<Block>) -> Result<BlockStatus, Error>

pub fn number(
    &self,
    hash: <Block as Block>::Hash
) -> Result<Option<<<Block as Block>::Header as Header>::Number>, Error>

pub fn hash(
    &self,
    number: <<Block as Block>::Header as Header>::Number
) -> Result<Option<<Block as Block>::Hash>, Error>

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Implementors

impl<S, Block> HeaderBackend<Block> for sc_light::blockchain::Blockchain<S> where
    Block: BlockT,
    S: Storage<Block>, 

fn header(&self, id: BlockId<Block>) -> ClientResult<Option<Block::Header>>

fn info(&self) -> BlockchainInfo<Block>

fn status(&self, id: BlockId<Block>) -> ClientResult<BlockStatus>

fn number(&self, hash: Block::Hash) -> ClientResult<Option<NumberFor<Block>>>

fn hash(
    &self,
    number: <<Block as BlockT>::Header as HeaderT>::Number
) -> ClientResult<Option<Block::Hash>>

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