Enum BlockHeader

pub enum BlockHeader<'a> {
    BeaconChain(BeaconChainHeader<'a>),
    IntermediateShard(IntermediateShardHeader<'a>),
    LeafShard(LeafShardHeader<'a>),
}

Block header that together with BlockBody form a Block

Variants

BeaconChain(BeaconChainHeader<'a>)

Block header corresponds to the beacon chain

IntermediateShard(IntermediateShardHeader<'a>)

Block header corresponds to an intermediate shard

LeafShard(LeafShardHeader<'a>)

Block header corresponds to a leaf shard

Implementations

impl<'a> BlockHeader<'a>

pub fn try_from_bytes( bytes: &'a [u8], shard_kind: ShardKind, ) -> Option<(Self, &'a [u8])>

Try to create a new instance from provided bytes for provided shard index.

bytes should be 8-bytes aligned.

Returns an instance and remaining bytes on success, None if too few bytes were given, bytes are not properly aligned or input is otherwise invalid.

pub fn is_internally_consistent(&self) -> bool

Check block header’s internal consistency

pub fn try_from_bytes_unchecked( bytes: &'a [u8], shard_kind: ShardKind, ) -> Option<(Self, &'a [u8])>

The same as Self::try_from_bytes(), but for trusted input that skips some consistency checks

pub fn to_owned(self) -> Result<OwnedBlockHeader, OwnedBlockHeaderError>

Create an owned version of this header

pub fn pre_seal_hash(&self) -> Blake3Hash

Hash of the block before seal is applied to it

pub fn is_seal_valid(&self) -> bool

Verify seal against BlockHeader::pre_seal_hash()

pub fn root(&self) -> BlockRoot

Compute block root out of this header.

Block root is a Merkle Tree Root. The leaves are derived from individual fields in SharedBlockHeader and other fields of this enum in the declaration order.

Note that this method does a bunch of hashing and if hash is needed often, should be cached.

Trait Implementations

impl<'a> Clone for BlockHeader<'a>

fn clone(&self) -> BlockHeader<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for BlockHeader<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Deref for BlockHeader<'a>

type Target = SharedBlockHeader<'a>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a> From<BeaconChainHeader<'a>> for BlockHeader<'a>

fn from(value: BeaconChainHeader<'a>) -> Self

Converts to this type from the input type.

impl<'a> From<IntermediateShardHeader<'a>> for BlockHeader<'a>

fn from(value: IntermediateShardHeader<'a>) -> Self

Converts to this type from the input type.

impl<'a> From<LeafShardHeader<'a>> for BlockHeader<'a>

fn from(value: LeafShardHeader<'a>) -> Self

Converts to this type from the input type.

impl<'a> GenericBlockHeader<'a> for BlockHeader<'a>

type Owned = OwnedBlockHeader

Owned block header

fn try_to_owned(self) -> Option<Self::Owned>

Turn into owned version

fn root(&self) -> BlockRoot

Compute block root out of this header.

impl<'a> Copy for BlockHeader<'a>