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add functionality to periodically update routing scores from an exter…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| use std::{ | ||
| io::Cursor, | ||
| sync::{Arc, Mutex, RwLock}, | ||
| time::{Duration, SystemTime}, | ||
| }; | ||
|
|
||
| use crate::{logger::LdkLogger, NodeMetrics, Scorer}; | ||
| use crate::{ | ||
| write_node_metrics, DynStore, Logger, EXTERNAL_PATHFINDING_SCORES_SYNC_INTERVAL, | ||
| EXTERNAL_PATHFINDING_SCORES_SYNC_TIMEOUT_SECS, | ||
| }; | ||
| use lightning::{ | ||
| log_error, log_info, log_trace, routing::scoring::ChannelLiquidities, util::ser::Readable, | ||
| }; | ||
|
|
||
| /// Start a background task that periodically downloads scores via an external url and merges them into the local | ||
| /// pathfinding scores. | ||
| pub fn setup_background_pathfinding_scores_sync( | ||
| url: String, scorer: Arc<Mutex<crate::types::Scorer>>, node_metrics: Arc<RwLock<NodeMetrics>>, | ||
| kv_store: Arc<DynStore>, logger: Arc<Logger>, runtime: &tokio::runtime::Runtime, | ||
| mut stop_receiver: tokio::sync::watch::Receiver<()>, | ||
| ) { | ||
| log_info!(logger, "External scores background syncing enabled from {}", url); | ||
|
|
||
| let logger = Arc::clone(&logger); | ||
|
|
||
| runtime.spawn(async move { | ||
| let mut interval = tokio::time::interval(EXTERNAL_PATHFINDING_SCORES_SYNC_INTERVAL); | ||
| loop { | ||
| tokio::select! { | ||
| _ = stop_receiver.changed() => { | ||
| log_trace!( | ||
| logger, | ||
| "Stopping background syncing external scores.", | ||
| ); | ||
| return; | ||
| } | ||
| _ = interval.tick() => { | ||
| log_trace!( | ||
| logger, | ||
| "Background sync of external scores started.", | ||
| ); | ||
|
|
||
| sync_external_scores(logger.as_ref(), scorer.as_ref(), node_metrics.as_ref(), Arc::clone(&kv_store), &url).await; | ||
| } | ||
| } | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| async fn sync_external_scores( | ||
| logger: &Logger, scorer: &Mutex<Scorer>, node_metrics: &RwLock<NodeMetrics>, | ||
| kv_store: Arc<DynStore>, url: &String, | ||
| ) -> () { | ||
| let response = tokio::time::timeout( | ||
| Duration::from_secs(EXTERNAL_PATHFINDING_SCORES_SYNC_TIMEOUT_SECS), | ||
| reqwest::get(url), | ||
| ) | ||
| .await; | ||
|
|
||
| if let Err(e) = response { | ||
| log_error!(logger, "Retrieving external scores timed out: {}", e); | ||
| return; | ||
| } | ||
| let response = response.unwrap(); | ||
|
|
||
| if let Err(e) = response { | ||
| log_error!(logger, "Failed to retrieve external scores update: {}", e); | ||
| return; | ||
| } | ||
|
|
||
| let body = response.unwrap().bytes().await; | ||
| if let Err(e) = body { | ||
| log_error!(logger, "Failed to read external scores update: {}", e); | ||
| return; | ||
| } | ||
|
|
||
| let mut reader = Cursor::new(body.unwrap()); | ||
| match ChannelLiquidities::read(&mut reader) { | ||
| Ok(liquidities) => { | ||
| let duration_since_epoch = | ||
| SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap(); | ||
| scorer.lock().unwrap().merge(liquidities, duration_since_epoch); | ||
| let mut locked_node_metrics = node_metrics.write().unwrap(); | ||
| locked_node_metrics.latest_pathfinding_scores_sync_timestamp = | ||
| Some(duration_since_epoch.as_secs()); | ||
| write_node_metrics(&*locked_node_metrics, kv_store, logger).unwrap_or_else(|e| { | ||
| log_error!(logger, "Persisting node metrics failed: {}", e); | ||
| }); | ||
| log_trace!(logger, "External scores merged successfully"); | ||
| }, | ||
| Err(e) => { | ||
| log_error!(logger, "Failed to parse external scores update: {}", e); | ||
| }, | ||
| } | ||
| } |
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