Trait HeaderProvider 

pub trait HeaderProvider: Send {
    type Header: BlockHeader;

    // Required methods
    fn header(
        &self,
        block_hash: BlockHash,
    ) -> ProviderResult<Option<Self::Header>>;
    fn header_by_number(&self, num: u64) -> ProviderResult<Option<Self::Header>>;
    fn headers_range(
        &self,
        range: impl RangeBounds<BlockNumber>,
    ) -> ProviderResult<Vec<Self::Header>>;
    fn sealed_header(
        &self,
        number: BlockNumber,
    ) -> ProviderResult<Option<SealedHeader<Self::Header>>>;
    fn sealed_headers_while(
        &self,
        range: impl RangeBounds<BlockNumber>,
        predicate: impl FnMut(&SealedHeader<Self::Header>) -> bool,
    ) -> ProviderResult<Vec<SealedHeader<Self::Header>>>;

    // Provided methods
    fn is_known(&self, block_hash: BlockHash) -> ProviderResult<bool> { ... }
    fn sealed_header_by_hash(
        &self,
        block_hash: BlockHash,
    ) -> ProviderResult<Option<SealedHeader<Self::Header>>> { ... }
    fn header_by_hash_or_number(
        &self,
        hash_or_num: BlockHashOrNumber,
    ) -> ProviderResult<Option<Self::Header>> { ... }
    fn sealed_headers_range(
        &self,
        range: impl RangeBounds<BlockNumber>,
    ) -> ProviderResult<Vec<SealedHeader<Self::Header>>> { ... }
}

Client trait for fetching Header related data.

Required Associated Types

type Header: BlockHeader

The header type this provider supports.

Required Methods

fn header(&self, block_hash: BlockHash) -> ProviderResult<Option<Self::Header>>

Get header by block hash

fn header_by_number(&self, num: u64) -> ProviderResult<Option<Self::Header>>

Get header by block number

fn headers_range( &self, range: impl RangeBounds<BlockNumber>, ) -> ProviderResult<Vec<Self::Header>>

Get headers in range of block numbers

fn sealed_header( &self, number: BlockNumber, ) -> ProviderResult<Option<SealedHeader<Self::Header>>>

Get a single sealed header by block number.

fn sealed_headers_while( &self, range: impl RangeBounds<BlockNumber>, predicate: impl FnMut(&SealedHeader<Self::Header>) -> bool, ) -> ProviderResult<Vec<SealedHeader<Self::Header>>>

Get sealed headers while predicate returns true or the range is exhausted.

Provided Methods

fn is_known(&self, block_hash: BlockHash) -> ProviderResult<bool>

Check if block is known

fn sealed_header_by_hash( &self, block_hash: BlockHash, ) -> ProviderResult<Option<SealedHeader<Self::Header>>>

Retrieves the header sealed by the given block hash.

fn header_by_hash_or_number( &self, hash_or_num: BlockHashOrNumber, ) -> ProviderResult<Option<Self::Header>>

Get header by block number or hash

fn sealed_headers_range( &self, range: impl RangeBounds<BlockNumber>, ) -> ProviderResult<Vec<SealedHeader<Self::Header>>>

Get headers in range of block numbers.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<'a, T: 'a + HeaderProvider + ?Sized> HeaderProvider for &'a T

where &'a T: Send,

type Header = <T as HeaderProvider>::Header

fn is_known(&self, block_hash: BlockHash) -> ProviderResult<bool>

fn header(&self, block_hash: BlockHash) -> ProviderResult<Option<Self::Header>>

fn sealed_header_by_hash( &self, block_hash: BlockHash, ) -> ProviderResult<Option<SealedHeader<Self::Header>>>

fn header_by_number(&self, num: u64) -> ProviderResult<Option<Self::Header>>

fn header_by_hash_or_number( &self, hash_or_num: BlockHashOrNumber, ) -> ProviderResult<Option<Self::Header>>

fn headers_range( &self, range: impl RangeBounds<BlockNumber>, ) -> ProviderResult<Vec<Self::Header>>

fn sealed_header( &self, number: BlockNumber, ) -> ProviderResult<Option<SealedHeader<Self::Header>>>

fn sealed_headers_range( &self, range: impl RangeBounds<BlockNumber>, ) -> ProviderResult<Vec<SealedHeader<Self::Header>>>

fn sealed_headers_while( &self, range: impl RangeBounds<BlockNumber>, predicate: impl FnMut(&SealedHeader<Self::Header>) -> bool, ) -> ProviderResult<Vec<SealedHeader<Self::Header>>>

impl<T: HeaderProvider + ?Sized> HeaderProvider for Arc<T>

where Arc<T>: Send,

type Header = <T as HeaderProvider>::Header

fn is_known(&self, block_hash: BlockHash) -> ProviderResult<bool>

fn header(&self, block_hash: BlockHash) -> ProviderResult<Option<Self::Header>>

fn sealed_header_by_hash( &self, block_hash: BlockHash, ) -> ProviderResult<Option<SealedHeader<Self::Header>>>

fn header_by_number(&self, num: u64) -> ProviderResult<Option<Self::Header>>

fn header_by_hash_or_number( &self, hash_or_num: BlockHashOrNumber, ) -> ProviderResult<Option<Self::Header>>

fn headers_range( &self, range: impl RangeBounds<BlockNumber>, ) -> ProviderResult<Vec<Self::Header>>

fn sealed_header( &self, number: BlockNumber, ) -> ProviderResult<Option<SealedHeader<Self::Header>>>

fn sealed_headers_range( &self, range: impl RangeBounds<BlockNumber>, ) -> ProviderResult<Vec<SealedHeader<Self::Header>>>

fn sealed_headers_while( &self, range: impl RangeBounds<BlockNumber>, predicate: impl FnMut(&SealedHeader<Self::Header>) -> bool, ) -> ProviderResult<Vec<SealedHeader<Self::Header>>>

Implementors

impl<C: Send + Sync, N: NodePrimitives> HeaderProvider for NoopProvider<C, N>

type Header = <N as NodePrimitives>::BlockHeader