Struct Snapshot 

pub struct Snapshot {
    pub version: u8,
    pub id: Hash,
    pub version_vector: VersionVector,
    pub superseded_roots: Vec<Hash>,
    pub state_data: Vec<u8>,
    pub created_at: u64,
    pub creator: String,
    pub metadata: HashMap<String, String>,
}

A snapshot of CRDT state at a specific point in causal history.

Fields

version: u8

Format version for compatibility.

id: Hash

Unique identifier for this snapshot.

version_vector: VersionVector

The version vector at the time of the snapshot. This represents the causal frontier.

superseded_roots: Vec<Hash>

The CIDs of DAG nodes that this snapshot supersedes. These can be safely pruned after the snapshot is stable.

state_data: Vec<u8>

The serialized CRDT state.

created_at: u64

Timestamp when the snapshot was created.

creator: String

The replica that created this snapshot.

metadata: HashMap<String, String>

Optional metadata about the snapshot.

Implementations

impl Snapshot

pub fn new( version_vector: VersionVector, superseded_roots: Vec<Hash>, state_data: Vec<u8>, creator: impl Into<String>, created_at: u64, ) -> Self

Create a new snapshot from serialized state.

pub fn with_metadata( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

Add metadata to the snapshot.

pub fn to_merkle_node(&self) -> Result<MerkleNode, SnapshotError>

Convert this snapshot to a MerkleNode for storage in the DAG.

pub fn from_merkle_node(node: &MerkleNode) -> Result<Self, SnapshotError>

Deserialize a snapshot from a MerkleNode payload.

pub fn covers(&self, vv: &VersionVector) -> bool

Check if this snapshot covers a given version vector.

pub fn size(&self) -> usize

Get the total size of the snapshot in bytes.

Trait Implementations

impl Clone for Snapshot

fn clone(&self) -> Snapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Snapshot

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Snapshot

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Snapshot

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

where __S: Serializer,

Serialize this value into the given Serde serializer.