Struct SnapshotAnnouncement 

pub struct SnapshotAnnouncement {
    pub snapshot: SnapshotId,
    pub covers: u64,
    pub breaking_version: u32,
    pub purpose: Purpose,
    pub digest: [u8; 32],
}

A claimed announcement of an immutable snapshot body.

Fields

snapshot: SnapshotId

Audience, writer and object number forming the snapshot path.

covers: u64

Last included slot; strictly below the announcing slot.

breaking_version: u32

The version of the newest breaking migration the body went through, zero if none. Applying the announcement refuses one its audience has not been raised to by the coverage (§16.3).

purpose: Purpose

Ordinary state or an admin operation’s preparation.

digest: [u8; 32]

SHA-256 of the complete sealed snapshot object.

Implementations

impl SnapshotAnnouncement

pub fn encode(&self, slot: Slot) -> Result<Vec<u8>, Error>

Encode the announcement at its claimed slot.

pub fn decode(bytes: &[u8], slot: Slot) -> Result<Self, Error>

Decode exactly one announcement and check coverage precedes its slot.

Trait Implementations

impl Clone for SnapshotAnnouncement

fn clone(&self) -> SnapshotAnnouncement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SnapshotAnnouncement

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

Formats the value using the given formatter.

impl PartialEq for SnapshotAnnouncement

fn eq(&self, other: &SnapshotAnnouncement) -> 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 Eq for SnapshotAnnouncement

impl StructuralPartialEq for SnapshotAnnouncement