Struct PieceHeader 

#[repr(C)]
pub struct PieceHeader {
    pub shard_index: Unaligned<ShardIndex>,
    pub local_segment_index: Unaligned<LocalSegmentIndex>,
    pub super_segment_index: Unaligned<SuperSegmentIndex>,
    pub segment_position: Unaligned<SegmentPosition>,
    pub segment_root: SegmentRoot,
    pub segment_proof: SegmentProof,
    pub parity_chunks_root: RecordChunksRoot,
    pub record_proof: RecordProof,
}

Header for a piece of archival history.

Primarily contains information needed for piece verification.

Fields

shard_index: Unaligned<ShardIndex>

Shard index

local_segment_index: Unaligned<LocalSegmentIndex>

Local segment index

super_segment_index: Unaligned<SuperSegmentIndex>

Super segment index

segment_position: Unaligned<SegmentPosition>

Position of the segment in the super segment

segment_root: SegmentRoot

Segment root

segment_proof: SegmentProof

Segment proof

parity_chunks_root: RecordChunksRoot

Root of parity record chunks.

Technically redundant, but helps to avoid repeating erasure coding during verification.

record_proof: RecordProof

Proof that the record (root) belongs to a segment

Trait Implementations

impl Clone for PieceHeader

fn clone(&self) -> PieceHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PieceHeader

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

Formats the value using the given formatter.

impl Decode for PieceHeader

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 Default for PieceHeader

fn default() -> PieceHeader

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PieceHeader

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encode for PieceHeader

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 PartialEq for PieceHeader

fn eq(&self, other: &PieceHeader) -> 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 PieceHeader

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 PieceHeader

where Unaligned<ShardIndex>: TrivialType, Unaligned<LocalSegmentIndex>: TrivialType, Unaligned<SuperSegmentIndex>: TrivialType, Unaligned<SegmentPosition>: TrivialType, SegmentRoot: TrivialType, SegmentProof: TrivialType, RecordChunksRoot: TrivialType, RecordProof: 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 read_unaligned(bytes: &[u8]) -> Option<Self>

Read unaligned value from memory.

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

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

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

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

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

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

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

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

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.

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 Copy for PieceHeader

impl EncodeLike for PieceHeader

impl Eq for PieceHeader

impl StructuralPartialEq for PieceHeader