DRY up batched KVStore reads with read_all_objects helper

The parallel `JoinSet`-based batching loop was duplicated across
`read_payments` and `read_pending_payments`. Extract it into a generic
`read_all_objects<T: Readable>` helper that callers invoke directly
with the relevant namespace constants. Per-type log messages are
preserved via `std::any::type_name::<T>()`.

Co-Authored-By: HAL 9000

Author: tnull

src/builder.rs

@@ -59,9 +59,8 @@ use crate::fee_estimator::OnchainFeeEstimator;
 use crate::gossip::GossipSource;
 use crate::io::sqlite_store::SqliteStore;
 use crate::io::utils::{
-	read_event_queue, read_external_pathfinding_scores_from_cache, read_network_graph,
-	read_node_metrics, read_output_sweeper, read_payments, read_peer_info, read_pending_payments,
-	read_scorer,
+	read_all_objects, read_event_queue, read_external_pathfinding_scores_from_cache,
+	read_network_graph, read_node_metrics, read_output_sweeper, read_peer_info, read_scorer,
 };
 use crate::io::vss_store::VssStoreBuilder;
 use crate::io::{
@@ -1279,9 +1278,19 @@ fn build_with_store_internal(
 	let (payment_store_res, node_metris_res, pending_payment_store_res) =
 		runtime.block_on(async move {
 			tokio::join!(
-				read_payments(&*kv_store_ref, Arc::clone(&logger_ref)),
+				read_all_objects(
+					&*kv_store_ref,
+					PAYMENT_INFO_PERSISTENCE_PRIMARY_NAMESPACE,
+					PAYMENT_INFO_PERSISTENCE_SECONDARY_NAMESPACE,
+					Arc::clone(&logger_ref),
+				),
 				read_node_metrics(&*kv_store_ref, Arc::clone(&logger_ref)),
-				read_pending_payments(&*kv_store_ref, Arc::clone(&logger_ref))
+				read_all_objects(
+					&*kv_store_ref,
+					PENDING_PAYMENT_INFO_PERSISTENCE_PRIMARY_NAMESPACE,
+					PENDING_PAYMENT_INFO_PERSISTENCE_SECONDARY_NAMESPACE,
+					Arc::clone(&logger_ref),
+				)
 			)
 		});
 

src/io/utils.rs

@@ -44,11 +44,10 @@ use crate::io::{
 	NODE_METRICS_KEY, NODE_METRICS_PRIMARY_NAMESPACE, NODE_METRICS_SECONDARY_NAMESPACE,
 };
 use crate::logger::{log_error, LdkLogger, Logger};
-use crate::payment::PendingPaymentDetails;
 use crate::peer_store::PeerStore;
 use crate::types::{Broadcaster, DynStore, KeysManager, Sweeper};
 use crate::wallet::ser::{ChangeSetDeserWrapper, ChangeSetSerWrapper};
-use crate::{Error, EventQueue, NodeMetrics, PaymentDetails};
+use crate::{Error, EventQueue, NodeMetrics};
 
 pub const EXTERNAL_PATHFINDING_SCORES_CACHE_KEY: &str = "external_pathfinding_scores_cache";
 
@@ -221,21 +220,19 @@ where
 	})
 }
 
-/// Read previously persisted payments information from the store.
-pub(crate) async fn read_payments<L: Deref>(
-	kv_store: &DynStore, logger: L,
-) -> Result<Vec<PaymentDetails>, std::io::Error>
+/// Read all objects of type `T` from the given namespace, spawning reads in parallel.
+pub(crate) async fn read_all_objects<T, L>(
+	kv_store: &DynStore, primary_namespace: &str, secondary_namespace: &str, logger: L,
+) -> Result<Vec<T>, std::io::Error>
 where
+	T: Readable,
+	L: Deref,
 	L::Target: LdkLogger,
 {
+	let type_name = std::any::type_name::<T>();
 	let mut res = Vec::new();
 
-	let mut stored_keys = KVStore::list(
-		&*kv_store,
-		PAYMENT_INFO_PERSISTENCE_PRIMARY_NAMESPACE,
-		PAYMENT_INFO_PERSISTENCE_SECONDARY_NAMESPACE,
-	)
-	.await?;
+	let mut stored_keys = KVStore::list(&*kv_store, primary_namespace, secondary_namespace).await?;
 
 	const BATCH_SIZE: usize = 50;
 
@@ -244,12 +241,7 @@ where
 	// Fill JoinSet with tasks if possible
 	while set.len() < BATCH_SIZE && !stored_keys.is_empty() {
 		if let Some(next_key) = stored_keys.pop() {
-			let fut = KVStore::read(
-				&*kv_store,
-				PAYMENT_INFO_PERSISTENCE_PRIMARY_NAMESPACE,
-				PAYMENT_INFO_PERSISTENCE_SECONDARY_NAMESPACE,
-				&next_key,
-			);
+			let fut = KVStore::read(kv_store, primary_namespace, secondary_namespace, &next_key);
 			set.spawn(fut);
 			debug_assert!(set.len() <= BATCH_SIZE);
 		}
@@ -259,37 +251,32 @@ where
 		// Exit early if we get an IO error.
 		let reader = read_res
 			.map_err(|e| {
-				log_error!(logger, "Failed to read PaymentDetails: {}", e);
+				log_error!(logger, "Failed to read {}: {}", type_name, e);
 				set.abort_all();
 				e
 			})?
 			.map_err(|e| {
-				log_error!(logger, "Failed to read PaymentDetails: {}", e);
+				log_error!(logger, "Failed to read {}: {}", type_name, e);
 				set.abort_all();
 				e
 			})?;
 
 		// Refill set for every finished future, if we still have something to do.
 		if let Some(next_key) = stored_keys.pop() {
-			let fut = KVStore::read(
-				&*kv_store,
-				PAYMENT_INFO_PERSISTENCE_PRIMARY_NAMESPACE,
-				PAYMENT_INFO_PERSISTENCE_SECONDARY_NAMESPACE,
-				&next_key,
-			);
+			let fut = KVStore::read(kv_store, primary_namespace, secondary_namespace, &next_key);
 			set.spawn(fut);
 			debug_assert!(set.len() <= BATCH_SIZE);
 		}
 
 		// Handle result.
-		let payment = PaymentDetails::read(&mut &*reader).map_err(|e| {
-			log_error!(logger, "Failed to deserialize PaymentDetails: {}", e);
+		let object = T::read(&mut &*reader).map_err(|e| {
+			log_error!(logger, "Failed to deserialize {}: {}", type_name, e);
 			std::io::Error::new(
 				std::io::ErrorKind::InvalidData,
-				"Failed to deserialize PaymentDetails",
+				format!("Failed to deserialize {}", type_name),
 			)
 		})?;
-		res.push(payment);
+		res.push(object);
 	}
 
 	debug_assert!(set.is_empty());
@@ -632,83 +619,6 @@ pub(crate) fn read_bdk_wallet_change_set(
 	Ok(Some(change_set))
 }
 
-/// Read previously persisted pending payments information from the store.
-pub(crate) async fn read_pending_payments<L: Deref>(
-	kv_store: &DynStore, logger: L,
-) -> Result<Vec<PendingPaymentDetails>, std::io::Error>
-where
-	L::Target: LdkLogger,
-{
-	let mut res = Vec::new();
-
-	let mut stored_keys = KVStore::list(
-		&*kv_store,
-		PENDING_PAYMENT_INFO_PERSISTENCE_PRIMARY_NAMESPACE,
-		PENDING_PAYMENT_INFO_PERSISTENCE_SECONDARY_NAMESPACE,
-	)
-	.await?;
-
-	const BATCH_SIZE: usize = 50;
-
-	let mut set = tokio::task::JoinSet::new();
-
-	// Fill JoinSet with tasks if possible
-	while set.len() < BATCH_SIZE && !stored_keys.is_empty() {
-		if let Some(next_key) = stored_keys.pop() {
-			let fut = KVStore::read(
-				&*kv_store,
-				PENDING_PAYMENT_INFO_PERSISTENCE_PRIMARY_NAMESPACE,
-				PENDING_PAYMENT_INFO_PERSISTENCE_SECONDARY_NAMESPACE,
-				&next_key,
-			);
-			set.spawn(fut);
-			debug_assert!(set.len() <= BATCH_SIZE);
-		}
-	}
-
-	while let Some(read_res) = set.join_next().await {
-		// Exit early if we get an IO error.
-		let reader = read_res
-			.map_err(|e| {
-				log_error!(logger, "Failed to read PendingPaymentDetails: {}", e);
-				set.abort_all();
-				e
-			})?
-			.map_err(|e| {
-				log_error!(logger, "Failed to read PendingPaymentDetails: {}", e);
-				set.abort_all();
-				e
-			})?;
-
-		// Refill set for every finished future, if we still have something to do.
-		if let Some(next_key) = stored_keys.pop() {
-			let fut = KVStore::read(
-				&*kv_store,
-				PENDING_PAYMENT_INFO_PERSISTENCE_PRIMARY_NAMESPACE,
-				PENDING_PAYMENT_INFO_PERSISTENCE_SECONDARY_NAMESPACE,
-				&next_key,
-			);
-			set.spawn(fut);
-			debug_assert!(set.len() <= BATCH_SIZE);
-		}
-
-		// Handle result.
-		let pending_payment = PendingPaymentDetails::read(&mut &*reader).map_err(|e| {
-			log_error!(logger, "Failed to deserialize PendingPaymentDetails: {}", e);
-			std::io::Error::new(
-				std::io::ErrorKind::InvalidData,
-				"Failed to deserialize PendingPaymentDetails",
-			)
-		})?;
-		res.push(pending_payment);
-	}
-
-	debug_assert!(set.is_empty());
-	debug_assert!(stored_keys.is_empty());
-
-	Ok(res)
-}
-
 #[cfg(test)]
 mod tests {
 	use super::read_or_generate_seed_file;