Struct BlockHeaderPrefix 

#[repr(C)]
pub struct BlockHeaderPrefix {
    pub number: BlockNumber,
    pub shard_index: ShardIndex,
    pub padding_0: [u8; 4],
    pub timestamp: BlockTimestamp,
    pub parent_root: BlockRoot,
    pub mmr_root: Blake3Hash,
}

Block header prefix.

The prefix contains generic information known about the block before block creation starts.

Fields

number: BlockNumber

Block number

shard_index: ShardIndex

Shard index

padding_0: [u8; 4]

Padding for data structure alignment, contents must be all zeroes

timestamp: BlockTimestamp

Block timestamp

parent_root: BlockRoot

Root of the parent block

mmr_root: Blake3Hash

MMR root of all block roots, including parent_root

Implementations

impl BlockHeaderPrefix

pub fn hash(&self) -> Blake3Hash

Hash of the block header prefix, part of the eventual block root

Trait Implementations

impl AnyBitPatternMarker for BlockHeaderPrefix

where for<'__ab_io_type> BlockNumber: AnyBitPatternMarker, for<'__ab_io_type> ShardIndex: AnyBitPatternMarker, for<'__ab_io_type> [u8; 4]: AnyBitPatternMarker, for<'__ab_io_type> BlockTimestamp: AnyBitPatternMarker, for<'__ab_io_type> BlockRoot: AnyBitPatternMarker, for<'__ab_io_type> Blake3Hash: AnyBitPatternMarker,

impl Clone for BlockHeaderPrefix

fn clone(&self) -> BlockHeaderPrefix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BlockHeaderPrefix

impl Debug for BlockHeaderPrefix

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

Formats the value using the given formatter.

impl Decode for BlockHeaderPrefix

fn decode<__CodecInputEdqy: Input>( __codec_input_edqy: &mut __CodecInputEdqy, ) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>

where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl<'de> Deserialize<'de> for BlockHeaderPrefix

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encode for BlockHeaderPrefix

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy, )

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> R

where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl EncodeLike for BlockHeaderPrefix

impl Eq for BlockHeaderPrefix

impl MaxEncodedLen for BlockHeaderPrefix

fn max_encoded_len() -> usize

Upper bound, in bytes, of the maximum encoded size of this item.

impl PartialEq for BlockHeaderPrefix

fn eq(&self, other: &BlockHeaderPrefix) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for BlockHeaderPrefix

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for BlockHeaderPrefix

impl TrivialType for BlockHeaderPrefix

where BlockNumber: TrivialType, ShardIndex: TrivialType, [u8; 4]: TrivialType, BlockTimestamp: TrivialType, BlockRoot: TrivialType, Blake3Hash: TrivialType,

const ALIGNMENT: Alignment

Alignment of the type in metadata.

const METADATA: &[u8]

Data structure metadata in binary form, describing shape and types of the contents, see IoTypeMetadataKind for encoding details.

fn try_from_bytes_unaligned(bytes: &[u8]) -> Option<(&Unaligned<Self>, &[u8])>

Parse the beginning of bytes, which don’t need to be aligned.

const SIZE: u32 = _

final fn try_from_bytes(bytes: &[u8]) -> Option<(&Self, &[u8])>

Parse the beginning of aligned bytes, returns the value and the remaining bytes.

final fn try_from_bytes_exact(bytes: &[u8]) -> Option<&Self>

Like Self::try_from_bytes(), but returns None if there are more bytes than the value

final fn try_from_bytes_mut(bytes: &mut [u8]) -> Option<(&mut Self, &mut [u8])>

Like Self::try_from_bytes(), but returns an exclusive reference.

final fn try_read_unaligned(bytes: &[u8]) -> Option<(Self, &[u8])>

Read a copy from the beginning of bytes, which don’t need to be aligned, returns the value and the remaining bytes

final fn try_read_unaligned_exact(bytes: &[u8]) -> Option<Self>

Like Self::try_read_unaligned(), but returns None if there are more bytes than the value

final unsafe fn read_unaligned(bytes: &[u8]) -> Option<Self>

Read unaligned value from memory.

final unsafe fn read_unaligned_unchecked(bytes: &[u8]) -> Self

Similar to Self::read_unaligned(), but doesn’t do any checks at all.

final unsafe fn from_bytes(bytes: &[u8]) -> Option<&Self>

Create a reference to a type, which is represented by provided memory.

final unsafe fn from_bytes_unchecked(bytes: &[u8]) -> &Self

Similar to Self::from_bytes(), but doesn’t do any checks at all.

final unsafe fn from_bytes_mut(bytes: &mut [u8]) -> Option<&mut Self>

Create a mutable reference to a type, which is represented by provided memory.

final unsafe fn from_bytes_mut_unchecked(bytes: &mut [u8]) -> &mut Self

Similar to Self::from_bytes_mut(), but doesn’t do any checks at all.

final fn as_bytes(&self) -> &[u8; ab_io_type::trivial_type::SIZE_OF::<Self>]

Access the underlying byte representation of a data structure

final unsafe fn as_bytes_mut( &mut self, ) -> &mut [u8; ab_io_type::trivial_type::SIZE_OF::<Self>]

Access the underlying mutable byte representation of a data structure.