f Account for new MaxDustHTLCExposure enum

bindings/ldk_node.udl

@@ -62,7 +62,7 @@ interface LDKNode {
 	[Throws=NodeError]
 	void close_channel([ByRef]ChannelId channel_id, PublicKey counterparty_node_id);
 	[Throws=NodeError]
-	void update_channel_config([ByRef]ChannelId channel_id, PublicKey counterparty_node_id, [ByRef]ChannelConfig channel_config);
+	void update_channel_config([ByRef]ChannelId channel_id, PublicKey counterparty_node_id, ChannelConfig channel_config);
 	[Throws=NodeError]
 	void sync_wallets();
 	[Throws=NodeError]
@@ -203,11 +203,18 @@ dictionary ChannelConfig {
 	u32 forwarding_fee_proportional_millionths = 0;
 	u32 forwarding_fee_base_msat = 1000;
 	u16 cltv_expiry_delta = 72;
-	u64 max_dust_htlc_exposure_msat = 5000000;
+	MaxDustHTLCExposure max_dust_htlc_exposure;
 	u64 force_close_avoidance_max_fee_satoshis = 1000;
 	boolean accept_underpaying_htlcs = false;
 };
 
+interface MaxDustHTLCExposure {
+	[Name=from_fixed_limit]
+	constructor(u64 limit);
+	[Name=from_fee_multiplier]
+	constructor(u64 multiplier);
+};
+
 enum LogLevel {
 	"Gossip",
 	"Trace",

src/lib.rs

@@ -100,6 +100,7 @@ use error::Error;
 
 pub use event::Event;
 pub use types::NetAddress;
+pub use types::ChannelConfig;
 
 pub use io::utils::generate_entropy_mnemonic;
 
@@ -119,7 +120,7 @@ use payment_store::PaymentStore;
 pub use payment_store::{PaymentDetails, PaymentDirection, PaymentStatus};
 use peer_store::{PeerInfo, PeerStore};
 use types::{ChainMonitor, ChannelManager, KeysManager, NetworkGraph, PeerManager, Scorer};
-pub use types::{ChannelDetails, ChannelId, PeerDetails, UserChannelId};
+pub use types::{ChannelDetails, ChannelId, PeerDetails, UserChannelId, MaxDustHTLCExposure};
 use wallet::Wallet;
 
 use logger::{log_error, log_info, log_trace, FilesystemLogger, Logger};
@@ -129,7 +130,7 @@ use lightning::ln::channelmanager::{self, PaymentId, RecipientOnionFields, Retry
 use lightning::ln::{PaymentHash, PaymentPreimage};
 use lightning::sign::EntropySource;
 
-use lightning::util::config::{ChannelConfig, ChannelHandshakeConfig, UserConfig};
+use lightning::util::config::{ChannelHandshakeConfig, UserConfig};
 pub use lightning::util::logger::Level as LogLevel;
 
 use lightning_background_processor::process_events_async;
@@ -924,7 +925,7 @@ impl<K: KVStore + Sync + Send + 'static> Node<K> {
 				announced_channel: announce_channel,
 				..Default::default()
 			},
-			channel_config: channel_config.unwrap_or_default(),
+			channel_config: channel_config.unwrap_or_default().into(),
 			..Default::default()
 		};
 
@@ -1028,10 +1029,10 @@ impl<K: KVStore + Sync + Send + 'static> Node<K> {
 	/// Update the config for a previously opened channel.
 	pub fn update_channel_config(
 		&self, channel_id: &ChannelId, counterparty_node_id: PublicKey,
-		channel_config: &ChannelConfig,
+		channel_config: ChannelConfig,
 	) -> Result<(), Error> {
 		self.channel_manager
-			.update_channel_config(&counterparty_node_id, &[channel_id.0], channel_config)
+			.update_channel_config(&counterparty_node_id, &[channel_id.0], &channel_config.into())
 			.map_err(|_| Error::ChannelConfigUpdateFailed)
 	}
 

src/types.rs

@@ -11,8 +11,9 @@ use lightning::routing::router::DefaultRouter;
 use lightning::routing::scoring::{ProbabilisticScorer, ProbabilisticScoringFeeParameters};
 use lightning::sign::InMemorySigner;
 use lightning::util::ser::{Hostname, Readable, Writeable, Writer};
-use lightning_net_tokio::SocketDescriptor;
-use lightning_transaction_sync::EsploraSyncClient;
+use lightning::util::config::ChannelConfig as LdkChannelConfig;
+use lightning::util::config::MaxDustHTLCExposure as LdkMaxDustHTLCExposure;
+use lightning_net_tokio::SocketDescriptor; use lightning_transaction_sync::EsploraSyncClient;
 
 use bitcoin::secp256k1::PublicKey;
 use bitcoin::OutPoint;
@@ -393,3 +394,68 @@ impl Readable for NetAddress {
 		Ok(Self(addr))
 	}
 }
+
+/// Options which apply on a per-channel basis.
+pub struct ChannelConfig {
+	/// See documentation of [`LdkChannelConfig::forwarding_fee_proportional_millionths`].
+	pub forwarding_fee_proportional_millionths: u32,
+	/// See documentation of [`LdkChannelConfig::forwarding_fee_base_msat`].
+	pub forwarding_fee_base_msat: u32,
+	/// See documentation of [`LdkChannelConfig::cltv_expiry_delta`].
+	pub cltv_expiry_delta: u16,
+	/// See documentation of [`LdkChannelConfig::max_dust_htlc_exposure`].
+	pub max_dust_htlc_exposure: Arc<MaxDustHTLCExposure>,
+	/// See documentation of [`LdkChannelConfig::force_close_avoidance_max_fee_satoshis`].
+	pub force_close_avoidance_max_fee_satoshis: u64,
+	/// See documentation of [`LdkChannelConfig::accept_underpaying_htlcs`].
+	pub accept_underpaying_htlcs: bool,
+}
+
+impl From<LdkChannelConfig> for ChannelConfig {
+	fn from(value: LdkChannelConfig) -> Self {
+		Self {
+			forwarding_fee_proportional_millionths: value.forwarding_fee_proportional_millionths,
+			forwarding_fee_base_msat: value.forwarding_fee_base_msat,
+			cltv_expiry_delta: value.cltv_expiry_delta,
+			max_dust_htlc_exposure: Arc::new(MaxDustHTLCExposure(value.max_dust_htlc_exposure)),
+			force_close_avoidance_max_fee_satoshis: value.force_close_avoidance_max_fee_satoshis,
+			accept_underpaying_htlcs: value.accept_underpaying_htlcs,
+		}
+	}
+}
+
+impl From<ChannelConfig> for LdkChannelConfig {
+	fn from(value: ChannelConfig) -> Self {
+		Self {
+			forwarding_fee_proportional_millionths: value.forwarding_fee_proportional_millionths,
+			forwarding_fee_base_msat: value.forwarding_fee_base_msat,
+			cltv_expiry_delta: value.cltv_expiry_delta,
+			max_dust_htlc_exposure: value.max_dust_htlc_exposure.0.clone(),
+			force_close_avoidance_max_fee_satoshis: value.force_close_avoidance_max_fee_satoshis,
+			accept_underpaying_htlcs: value.accept_underpaying_htlcs,
+		}
+	}
+}
+
+impl Default for ChannelConfig {
+	fn default() -> Self {
+		LdkChannelConfig::default().into()
+	}
+}
+
+/// Options for how to set the max dust HTLC exposure allowed on a channel.
+///
+/// See documentation of [`LdkMaxDustHTLCExposure`] for details.
+pub struct MaxDustHTLCExposure (pub LdkMaxDustHTLCExposure);
+
+impl MaxDustHTLCExposure {
+	/// See documentation of [`LdkMaxDustHTLCExposure::FixedLimitMsat`] for details.
+	pub fn from_fixed_limit(limit_msat: u64) -> Self {
+		Self ( LdkMaxDustHTLCExposure::FixedLimitMsat(limit_msat) )
+	}
+
+	/// See documentation of [`LdkMaxDustHTLCExposure::FeeRateMultiplier`] for details.
+	pub fn from_fee_multiplier(multiplier: u64) -> Self {
+		Self ( LdkMaxDustHTLCExposure::FeeRateMultiplier(multiplier) )
+	}
+}