Improve on (potentially) blocking wallet behaviors

Cargo.toml

@@ -64,7 +64,7 @@ bip39 = "2.0.0"
 
 rand = "0.8.5"
 chrono = { version = "0.4", default-features = false, features = ["clock"] }
-tokio = { version = "1", default-features = false, features = [ "rt-multi-thread", "time", "sync" ] }
+tokio = { version = "1.37", default-features = false, features = [ "rt-multi-thread", "time", "sync" ] }
 esplora-client = { version = "0.6", default-features = false }
 libc = "0.2"
 uniffi = { version = "0.26.0", features = ["build"], optional = true }

bindings/ldk_node.udl

@@ -165,11 +165,15 @@ enum NodeError {
 	"ChannelConfigUpdateFailed",
 	"PersistenceFailed",
 	"FeerateEstimationUpdateFailed",
+	"FeerateEstimationUpdateTimeout",
 	"WalletOperationFailed",
+	"WalletOperationTimeout",
 	"OnchainTxSigningFailed",
 	"MessageSigningFailed",
 	"TxSyncFailed",
+	"TxSyncTimeout",
 	"GossipUpdateFailed",
+	"GossipUpdateTimeout",
 	"LiquidityRequestFailed",
 	"InvalidAddress",
 	"InvalidSocketAddress",

src/builder.rs

@@ -1,6 +1,6 @@
 use crate::config::{
 	default_user_config, Config, BDK_CLIENT_CONCURRENCY, BDK_CLIENT_STOP_GAP,
-	DEFAULT_ESPLORA_SERVER_URL, WALLET_KEYS_SEED_LEN,
+	DEFAULT_ESPLORA_CLIENT_TIMEOUT_SECS, DEFAULT_ESPLORA_SERVER_URL, WALLET_KEYS_SEED_LEN,
 };
 use crate::connection::ConnectionManager;
 use crate::event::EventQueue;
@@ -558,10 +558,15 @@ fn build_with_store_internal(
 
 	let (blockchain, tx_sync, tx_broadcaster, fee_estimator) = match chain_data_source_config {
 		Some(ChainDataSourceConfig::Esplora(server_url)) => {
-			let tx_sync = Arc::new(EsploraSyncClient::new(server_url.clone(), Arc::clone(&logger)));
-			let blockchain =
-				EsploraBlockchain::from_client(tx_sync.client().clone(), BDK_CLIENT_STOP_GAP)
-					.with_concurrency(BDK_CLIENT_CONCURRENCY);
+			let mut client_builder = esplora_client::Builder::new(&server_url.clone());
+			client_builder = client_builder.timeout(DEFAULT_ESPLORA_CLIENT_TIMEOUT_SECS);
+			let esplora_client = client_builder.build_async().unwrap();
+			let tx_sync = Arc::new(EsploraSyncClient::from_client(
+				esplora_client.clone(),
+				Arc::clone(&logger),
+			));
+			let blockchain = EsploraBlockchain::from_client(esplora_client, BDK_CLIENT_STOP_GAP)
+				.with_concurrency(BDK_CLIENT_CONCURRENCY);
 			let tx_broadcaster = Arc::new(TransactionBroadcaster::new(
 				tx_sync.client().clone(),
 				Arc::clone(&logger),
@@ -959,6 +964,7 @@ fn build_with_store_internal(
 	};
 
 	let (stop_sender, _) = tokio::sync::watch::channel(());
+	let (event_handling_stopped_sender, _) = tokio::sync::watch::channel(());
 
 	let is_listening = Arc::new(AtomicBool::new(false));
 	let latest_wallet_sync_timestamp = Arc::new(RwLock::new(None));
@@ -971,6 +977,7 @@ fn build_with_store_internal(
 	Ok(Node {
 		runtime,
 		stop_sender,
+		event_handling_stopped_sender,
 		config,
 		wallet,
 		tx_sync,

src/config.rs

@@ -28,6 +28,9 @@ pub(crate) const BDK_CLIENT_CONCURRENCY: u8 = 4;
 // The default Esplora server we're using.
 pub(crate) const DEFAULT_ESPLORA_SERVER_URL: &str = "https://blockstream.info/api";
 
+// The default Esplora client timeout we're using.
+pub(crate) const DEFAULT_ESPLORA_CLIENT_TIMEOUT_SECS: u64 = 10;
+
 // The timeout after which we abandon retrying failed payments.
 pub(crate) const LDK_PAYMENT_RETRY_TIMEOUT: Duration = Duration::from_secs(10);
 
@@ -46,6 +49,21 @@ pub(crate) const NODE_ANN_BCAST_INTERVAL: Duration = Duration::from_secs(60 * 60
 // The lower limit which we apply to any configured wallet sync intervals.
 pub(crate) const WALLET_SYNC_INTERVAL_MINIMUM_SECS: u64 = 10;
 
+// The timeout after which we abort a wallet syncing operation.
+pub(crate) const BDK_WALLET_SYNC_TIMEOUT_SECS: u64 = 90;
+
+// The timeout after which we abort a wallet syncing operation.
+pub(crate) const LDK_WALLET_SYNC_TIMEOUT_SECS: u64 = 30;
+
+// The timeout after which we abort a fee rate cache update operation.
+pub(crate) const FEE_RATE_CACHE_UPDATE_TIMEOUT_SECS: u64 = 5;
+
+// The timeout after which we abort a transaction broadcast operation.
+pub(crate) const TX_BROADCAST_TIMEOUT_SECS: u64 = 5;
+
+// The timeout after which we abort a RGS sync operation.
+pub(crate) const RGS_SYNC_TIMEOUT_SECS: u64 = 5;
+
 // The length in bytes of our wallets' keys seed.
 pub(crate) const WALLET_KEYS_SEED_LEN: usize = 64;
 

src/error.rs

@@ -33,16 +33,24 @@ pub enum Error {
 	PersistenceFailed,
 	/// A fee rate estimation update failed.
 	FeerateEstimationUpdateFailed,
+	/// A fee rate estimation update timed out.
+	FeerateEstimationUpdateTimeout,
 	/// A wallet operation failed.
 	WalletOperationFailed,
+	/// A wallet operation timed out.
+	WalletOperationTimeout,
 	/// A signing operation for transaction failed.
 	OnchainTxSigningFailed,
 	/// A signing operation for message failed.
 	MessageSigningFailed,
 	/// A transaction sync operation failed.
 	TxSyncFailed,
+	/// A transaction sync operation timed out.
+	TxSyncTimeout,
 	/// A gossip updating operation failed.
 	GossipUpdateFailed,
+	/// A gossip updating operation timed out.
+	GossipUpdateTimeout,
 	/// A liquidity request operation failed.
 	LiquidityRequestFailed,
 	/// The given address is invalid.
@@ -111,11 +119,17 @@ impl fmt::Display for Error {
 			Self::FeerateEstimationUpdateFailed => {
 				write!(f, "Failed to update fee rate estimates.")
 			},
+			Self::FeerateEstimationUpdateTimeout => {
+				write!(f, "Updating fee rate estimates timed out.")
+			},
 			Self::WalletOperationFailed => write!(f, "Failed to conduct wallet operation."),
+			Self::WalletOperationTimeout => write!(f, "A wallet operation timed out."),
 			Self::OnchainTxSigningFailed => write!(f, "Failed to sign given transaction."),
 			Self::MessageSigningFailed => write!(f, "Failed to sign given message."),
 			Self::TxSyncFailed => write!(f, "Failed to sync transactions."),
+			Self::TxSyncTimeout => write!(f, "Syncing transactions timed out."),
 			Self::GossipUpdateFailed => write!(f, "Failed to update gossip data."),
+			Self::GossipUpdateTimeout => write!(f, "Updating gossip data timed out."),
 			Self::LiquidityRequestFailed => write!(f, "Failed to request inbound liquidity."),
 			Self::InvalidAddress => write!(f, "The given address is invalid."),
 			Self::InvalidSocketAddress => write!(f, "The given network address is invalid."),

src/fee_estimator.rs

@@ -1,3 +1,4 @@
+use crate::config::FEE_RATE_CACHE_UPDATE_TIMEOUT_SECS;
 use crate::logger::{log_error, log_trace, Logger};
 use crate::{Config, Error};
 
@@ -14,6 +15,7 @@ use bitcoin::Network;
 use std::collections::HashMap;
 use std::ops::Deref;
 use std::sync::{Arc, RwLock};
+use std::time::Duration;
 
 pub(crate) struct OnchainFeeEstimator<L: Deref>
 where
@@ -55,7 +57,21 @@ where
 				ConfirmationTarget::OutputSpendingFee => 12,
 			};
 
-			let estimates = self.esplora_client.get_fee_estimates().await.map_err(|e| {
+			let estimates = tokio::time::timeout(
+				Duration::from_secs(FEE_RATE_CACHE_UPDATE_TIMEOUT_SECS),
+				self.esplora_client.get_fee_estimates(),
+			)
+			.await
+			.map_err(|e| {
+				log_error!(
+					self.logger,
+					"Updating fee rate estimates for {:?} timed out: {}",
+					target,
+					e
+				);
+				Error::FeerateEstimationUpdateTimeout
+			})?
+			.map_err(|e| {
 				log_error!(
 					self.logger,
 					"Failed to retrieve fee rate estimates for {:?}: {}",

src/gossip.rs

@@ -1,3 +1,4 @@
+use crate::config::RGS_SYNC_TIMEOUT_SECS;
 use crate::logger::{log_trace, FilesystemLogger, Logger};
 use crate::types::{GossipSync, Graph, P2PGossipSync, RapidGossipSync};
 use crate::Error;
@@ -6,6 +7,7 @@ use lightning::routing::utxo::UtxoLookup;
 
 use std::sync::atomic::{AtomicU32, Ordering};
 use std::sync::Arc;
+use std::time::Duration;
 
 pub(crate) enum GossipSource {
 	P2PNetwork {
@@ -55,7 +57,17 @@ impl GossipSource {
 			Self::RapidGossipSync { gossip_sync, server_url, latest_sync_timestamp, logger } => {
 				let query_timestamp = latest_sync_timestamp.load(Ordering::Acquire);
 				let query_url = format!("{}/{}", server_url, query_timestamp);
-				let response = reqwest::get(query_url).await.map_err(|e| {
+
+				let response = tokio::time::timeout(
+					Duration::from_secs(RGS_SYNC_TIMEOUT_SECS),
+					reqwest::get(query_url),
+				)
+				.await
+				.map_err(|e| {
+					log_trace!(logger, "Retrieving RGS gossip update timed out: {}", e);
+					Error::GossipUpdateTimeout
+				})?
+				.map_err(|e| {
 					log_trace!(logger, "Failed to retrieve RGS gossip update: {}", e);
 					Error::GossipUpdateFailed
 				})?;