Struct BlockHeaderPrefix

#[repr(C)]
pub struct BlockHeaderPrefix {
    pub version: u64,
    pub number: BlockNumber,
    pub shard_index: ShardIndex,
    pub padding: [u8; 4],
    pub timestamp: u64,
    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

version: u64

Block version

number: BlockNumber

Block number

shard_index: ShardIndex

Shard index

padding: [u8; 4]

Padding for data structure alignment

timestamp: u64

Unix timestamp in ms

parent_root: BlockRoot

Root of the parent block

mmr_root: Blake3Hash

MMR root of all block roots, including parent_root

Implementations

impl BlockHeaderPrefix

pub const BLOCK_VERSION: u64 = 0u64

The only supported block version right now

pub fn hash(&self) -> Blake3Hash

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

Trait Implementations

impl Clone for BlockHeaderPrefix

fn clone(&self) -> BlockHeaderPrefix

Returns a copy of the value.

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

Performs copy-assignment from source.

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 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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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 TrivialType for BlockHeaderPrefix

where u64: TrivialType, BlockNumber: TrivialType, ShardIndex: TrivialType, [u8; 4]: TrivialType, BlockRoot: TrivialType, Blake3Hash: TrivialType,

const METADATA: &[u8]

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

const SIZE: u32 = _

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

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

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

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

fn as_bytes(&self) -> &[u8]

Access the underlying byte representation of a data structure

unsafe fn as_bytes_mut(&mut self) -> &mut [u8]

Access the underlying mutable byte representation of a data structure.

impl TypeInfo for BlockHeaderPrefix

type Identity = BlockHeaderPrefix

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl Copy for BlockHeaderPrefix

impl EncodeLike for BlockHeaderPrefix

impl Eq for BlockHeaderPrefix

impl StructuralPartialEq for BlockHeaderPrefix