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PathPlanner

hopr_transport::path::planner

Struct PathPlanner 

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pub struct PathPlanner<Surb, R, S> {
    me: OffchainPublicKey,
    pub surb_store: Surb,
    resolver: Arc<R>,
    selector: Arc<S>,
    cache: Cache<(NodeId, NodeId, u32), Arc<WeightedCollection<ValidatedPath>>>,
    refresh_period: Duration,
}
Expand description

Path planner that resolves [DestinationRouting] to [ResolvedTransportRouting].

The planner delegates path discovery to any PathSelector implementation and owns the moka cache of fully-validated [ValidatedPath] objects paired with their traversal cost, keyed by (source: NodeId, destination: NodeId, hops: u32).

On a cache miss the planner calls the selector, validates every candidate against the chain resolver, and stores an Arc<WeightedCollection<ValidatedPath>> in the cache. On a cache hit a candidate is picked via weighted random selection (higher cost = higher quality = higher probability).

A background sweep (background_refresh) can be spawned to proactively re-warm the cache for all previously-seen keys.

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§me: OffchainPublicKey§surb_store: Surb§resolver: Arc<R>§selector: Arc<S>§cache: Cache<(NodeId, NodeId, u32), Arc<WeightedCollection<ValidatedPath>>>§refresh_period: Duration

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impl<Surb, R, S> PathPlanner<Surb, R, S>
where Surb: SurbStore + Send + Sync + 'static, R: ChainKeyOperations + ChainReadChannelOperations + Send + Sync + 'static, S: PathSelector + Send + Sync + 'static,

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pub fn new( me: OffchainPublicKey, surb_store: Surb, resolver: R, selector: S, config: PathPlannerConfig, ) -> Self

Create a new path planner.

me is this node’s OffchainPublicKey; it is used as the source in path queries.

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async fn resolve_node_id_to_offchain_key( &self, node_id: &NodeId, ) -> Result<OffchainPublicKey>

Resolve a [NodeId] to an OffchainPublicKey.

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async fn resolve_path( &self, source: NodeId, destination: NodeId, options: RoutingOptions, ) -> Result<ValidatedPath>

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pub async fn resolve_routing( &self, size_hint: usize, max_surbs: usize, routing: DestinationRouting, ) -> Result<(ResolvedTransportRouting<HoprSurb>, Option<usize>)>

Resolve a [DestinationRouting] to a [ResolvedTransportRouting].

Returns the resolved routing and, for Return variants, the number of remaining SURBs.

Trait Implementations§

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impl<Surb, R, S> BackgroundPathCacheRefreshable for PathPlanner<Surb, R, S>
where Surb: SurbStore + Send + Sync + 'static, R: ChainKeyOperations + ChainReadChannelOperations + Send + Sync + 'static, S: PathSelector + Send + Sync + 'static,

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fn run_background_refresh(&self) -> impl Future<Output = ()> + Send + 'static

Returns a future that runs the background path-cache refresh loop.

The returned future iterates over all keys currently in the planner’s cache and recomputes their paths on a configurable schedule, so that steady-state traffic is always served from cache.

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impl<Surb: Clone, R: Clone, S: Clone> Clone for PathPlanner<Surb, R, S>

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fn clone(&self) -> PathPlanner<Surb, R, S>

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl<Surb, R, S> Freeze for PathPlanner<Surb, R, S>
where Surb: Freeze,

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impl<Surb, R, S> !RefUnwindSafe for PathPlanner<Surb, R, S>

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impl<Surb, R, S> Send for PathPlanner<Surb, R, S>
where Surb: Send, R: Sync + Send, S: Sync + Send,

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impl<Surb, R, S> Sync for PathPlanner<Surb, R, S>
where Surb: Sync, R: Sync + Send, S: Sync + Send,

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impl<Surb, R, S> Unpin for PathPlanner<Surb, R, S>
where Surb: Unpin,

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impl<Surb, R, S> !UnwindSafe for PathPlanner<Surb, R, S>

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