Expose set_paths_to_static_invoice_server

Author: joostjager

src/builder.rs

@@ -38,6 +38,7 @@ use crate::wallet::persist::KVStoreWalletPersister;
 use crate::wallet::Wallet;
 use crate::{Node, NodeMetrics};
 
+use lightning::blinded_path::message::BlindedMessagePath;
 use lightning::chain::{chainmonitor, BestBlock, Watch};
 use lightning::io::Cursor;
 use lightning::ln::channelmanager::{self, ChainParameters, ChannelManagerReadArgs};
@@ -169,6 +170,8 @@ pub enum BuildError {
 	InvalidAnnouncementAddresses,
 	/// The provided alias is invalid.
 	InvalidNodeAlias,
+	/// The provided static invoice server paths are invalid.
+	InvalidStaticInvoiceServerPaths,
 	/// An attempt to setup a runtime has failed.
 	RuntimeSetupFailed,
 	/// We failed to read data from the [`KVStore`].
@@ -219,6 +222,9 @@ impl fmt::Display for BuildError {
 			Self::NetworkMismatch => {
 				write!(f, "Given network does not match the node's previously configured network.")
 			},
+			Self::InvalidStaticInvoiceServerPaths => {
+				write!(f, "Given static invoice server paths are invalid.")
+			},
 		}
 	}
 }
@@ -544,6 +550,15 @@ impl NodeBuilder {
 		Ok(self)
 	}
 
+	/// Sets the [`BlindedMessagePath`]s that we will use as an async recipient to interactively build [`Offer`]s with a
+	/// static invoice server, so the server can serve [`StaticInvoice`]s to payers on our behalf when we're offline.
+	pub fn set_paths_to_static_invoice_server(
+		&mut self, paths: Vec<BlindedMessagePath>,
+	) -> Result<&mut Self, BuildError> {
+		self.config.static_invoice_server_paths = Some(paths);
+		Ok(self)
+	}
+
 	/// Builds a [`Node`] instance with a [`SqliteStore`] backend and according to the options
 	/// previously configured.
 	pub fn build(&self) -> Result<Node, BuildError> {
@@ -1441,6 +1456,13 @@ fn build_with_store_internal(
 
 	let channel_manager = Arc::new(channel_manager);
 
+	// Configure static invoice server.
+	if let Some(paths) = config.static_invoice_server_paths.as_ref() {
+		channel_manager
+			.set_paths_to_static_invoice_server(paths.clone())
+			.map_err(|_| BuildError::InvalidStaticInvoiceServerPaths)?;
+	}
+
 	// Give ChannelMonitors to ChainMonitor
 	for (_blockhash, channel_monitor) in channel_monitors.into_iter() {
 		let channel_id = channel_monitor.channel_id();

src/config.rs

@@ -9,6 +9,7 @@
 
 use crate::logger::LogLevel;
 
+use lightning::blinded_path::message::BlindedMessagePath;
 use lightning::ln::msgs::SocketAddress;
 use lightning::routing::gossip::NodeAlias;
 use lightning::routing::router::RouteParametersConfig;
@@ -179,6 +180,10 @@ pub struct Config {
 	/// **Note:** If unset, default parameters will be used, and you will be able to override the
 	/// parameters on a per-payment basis in the corresponding method calls.
 	pub route_parameters: Option<RouteParametersConfig>,
+
+	/// The [`BlindedMessagePath`]s that we will use as an async recipient to interactively build [`Offer`]s with a
+	/// static invoice server, so the server can serve [`StaticInvoice`]s to payers on our behalf when we're offline.
+	pub static_invoice_server_paths: Option<Vec<BlindedMessagePath>>,
 }
 
 impl Default for Config {
@@ -193,6 +198,7 @@ impl Default for Config {
 			anchor_channels_config: Some(AnchorChannelsConfig::default()),
 			route_parameters: None,
 			node_alias: None,
+			static_invoice_server_paths: None,
 		}
 	}
 }