Struct Pruner 

pub struct Pruner {
    policy: PruningPolicy,
    preserved: HashSet<Hash>,
    stable_frontier: Option<VersionVector>,
}

Pruner for removing old DAG nodes.

Fields

policy: PruningPolicy

Pruning policy.

preserved: HashSet<Hash>

Set of CIDs that must be preserved (e.g., recent snapshots).

stable_frontier: Option<VersionVector>

The stable frontier at the time of pruning.

Implementations

impl Pruner

pub fn new() -> Self

Create a new pruner with default policy.

pub fn with_policy(policy: PruningPolicy) -> Self

Create a pruner with custom policy.

pub fn policy(&self) -> &PruningPolicy

Get the current policy.

pub fn set_stable_frontier(&mut self, frontier: VersionVector)

Set the stable frontier for pruning decisions.

pub fn preserve(&mut self, cid: Hash)

Mark a CID as preserved (cannot be pruned).

pub fn clear_preserved(&mut self)

Clear preserved CIDs.

pub fn identify_prunable<S: DAGStore>( &self, store: &S, snapshot: &Snapshot, current_time: u64, ) -> Vec<Hash>

Identify nodes that can be safely pruned.

This doesn’t actually modify the store - it returns the list of nodes that would be pruned if execute_prune is called.

pub fn execute_prune<S: DAGStore + PrunableStore>( &self, store: &mut S, snapshot: &Snapshot, current_time: u64, ) -> PruningResult

Execute pruning on a mutable store.

Returns the result of the pruning operation.

pub fn should_prune<S: DAGStore>( &self, store: &S, snapshot: &Snapshot, stability_monitor: Option<&StabilityMonitor>, ) -> bool

Check if pruning should be performed.

fn ancestors_within_depth<S: DAGStore>( &self, store: &S, cid: &Hash, depth: usize, ) -> HashSet<Hash>

Get ancestors within a certain depth.

fn find_genesis_path<S: DAGStore>(&self, store: &S) -> Option<Vec<Hash>>

Find a path from any head to genesis.

Trait Implementations

impl Default for Pruner

fn default() -> Self

Returns the “default value” for a type.