Switch to chain monitor deferred writes mode

Patch LDK dependencies to use the chain-mon-internal-deferred-writes
branch and enable deferred writes by passing `true` to the
ChainMonitor constructor.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: joostjager

Cargo.toml

@@ -39,17 +39,17 @@ default = []
 #lightning-liquidity = { version = "0.2.0", features = ["std"] }
 #lightning-macros = { version = "0.2.0" }
 
-lightning = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953", features = ["std"] }
-lightning-types = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953" }
-lightning-invoice = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953", features = ["std"] }
-lightning-net-tokio = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953" }
-lightning-persister = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953", features = ["tokio"] }
-lightning-background-processor = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953" }
-lightning-rapid-gossip-sync = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953" }
-lightning-block-sync = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953", features = ["rest-client", "rpc-client", "tokio"] }
-lightning-transaction-sync = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953", features = ["esplora-async-https", "time", "electrum-rustls-ring"] }
-lightning-liquidity = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953", features = ["std"] }
-lightning-macros = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953" }
+lightning = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7", features = ["std"] }
+lightning-types = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7" }
+lightning-invoice = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7", features = ["std"] }
+lightning-net-tokio = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7" }
+lightning-persister = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7", features = ["tokio"] }
+lightning-background-processor = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7" }
+lightning-rapid-gossip-sync = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7" }
+lightning-block-sync = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7", features = ["rest-client", "rpc-client", "tokio"] }
+lightning-transaction-sync = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7", features = ["esplora-async-https", "time", "electrum-rustls-ring"] }
+lightning-liquidity = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7", features = ["std"] }
+lightning-macros = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7" }
 
 bdk_chain = { version = "0.23.0", default-features = false, features = ["std"] }
 bdk_esplora = { version = "0.22.0", default-features = false, features = ["async-https-rustls", "tokio"]}
@@ -79,13 +79,13 @@ async-trait = { version = "0.1", default-features = false }
 vss-client = { package = "vss-client-ng", version = "0.5" }
 prost = { version = "0.11.6", default-features = false}
 #bitcoin-payment-instructions = { version = "0.6" }
-bitcoin-payment-instructions = { git = "https://github.com/tnull/bitcoin-payment-instructions", rev = "e9d7c07d7affc7714b023c853a65771e45277467" }
+bitcoin-payment-instructions = { git = "https://github.com/joostjager/bitcoin-payment-instructions", branch = "ldk-dcf0c203e166da2348bef12b2e5eff4a250cdec7" }
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3", features = ["winbase"] }
 
 [dev-dependencies]
-lightning = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "49912057895ddfbd69d503de67c80d5576c09953", features = ["std", "_test_utils"] }
+lightning = { git = "https://github.com/lightningdevkit/rust-lightning", rev = "dcf0c203e166da2348bef12b2e5eff4a250cdec7", features = ["std", "_test_utils"] }
 rand = { version = "0.9.2", default-features = false, features = ["std", "thread_rng", "os_rng"] }
 proptest = "1.0.0"
 regex = "1.5.6"

src/builder.rs

@@ -1547,6 +1547,7 @@ fn build_with_store_internal(
 		Arc::clone(&persister),
 		Arc::clone(&keys_manager),
 		peer_storage_key,
+		true,
 	));
 
 	// Initialize the network graph, scorer, and router

src/lib.rs

@@ -775,6 +775,12 @@ impl Node {
 		}
 	}
 
+	/// Returns the number of pending deferred chain monitor operations that have not
+	/// been flushed yet by the background processor.
+	pub fn pending_monitor_operation_count(&self) -> usize {
+		self.chain_monitor.pending_operation_count()
+	}
+
 	/// Returns the config with which the [`Node`] was initialized.
 	pub fn config(&self) -> Config {
 		self.config.as_ref().clone()

tests/common/mod.rs

@@ -1264,8 +1264,13 @@ pub(crate) async fn do_channel_full_cycle<E: ElectrumApi>(
 	);
 
 	println!("\nB close_channel (force: {})", force_close);
+	// Wait for the background processor to flush deferred monitor writes so that
+	// the channel state no longer has monitor_update_in_progress set.
+	exponential_backoff_poll(|| (node_a.pending_monitor_operation_count() == 0).then_some(()))
+		.await;
+	exponential_backoff_poll(|| (node_b.pending_monitor_operation_count() == 0).then_some(()))
+		.await;
 	if force_close {
-		tokio::time::sleep(Duration::from_secs(1)).await;
 		node_a.force_close_channel(&user_channel_id_a, node_b.node_id(), None).unwrap();
 	} else {
 		node_a.close_channel(&user_channel_id_a, node_b.node_id()).unwrap();