Add experimental LSPS2 support.

Author: G8XSU

ldk-server/Cargo.toml

@@ -18,3 +18,7 @@ hex = { package = "hex-conservative", version = "0.2.1", default-features = fals
 rusqlite = { version = "0.31.0", features = ["bundled"] }
 rand = { version = "0.8.5", default-features = false }
 async-trait = { version = "0.1.85", default-features = false }
+
+[features]
+default = []
+experimental-lsps2-support = []

ldk-server/src/main.rs

@@ -26,6 +26,7 @@ use crate::util::proto_adapter::{forwarded_payment_to_proto, payment_to_proto};
 use hex::DisplayHex;
 use ldk_node::config::Config;
 use ldk_node::lightning::ln::channelmanager::PaymentId;
+use ldk_node::liquidity::LSPS2ServiceConfig;
 use ldk_node::logger::LogLevel;
 use ldk_server_protos::events;
 use ldk_server_protos::events::{event_envelope, EventEnvelope};
@@ -76,6 +77,21 @@ fn main() {
 		config_file.bitcoind_rpc_password,
 	);
 
+	// LSPS2 support is highly experimental and for testing only,
+	// we don't support configuring these parameters yet.
+	#[cfg(feature = "experimental-lsps2-support")]
+	builder.set_liquidity_provider_lsps2(LSPS2ServiceConfig {
+		require_token: None,
+		advertise_service: true,
+		channel_opening_fee_ppm: 1000,            // 0.1% fee
+		channel_over_provisioning_ppm: 500_000,   // 50% extra capacity
+		min_channel_opening_fee_msat: 10_000_000, // 10,000 satoshis
+		min_channel_lifetime: 4320,               // ~30 days
+		max_client_to_self_delay: 1440,           // ~10 days
+		min_payment_size_msat: 10_000_000,        // 10,000 satoshis
+		max_payment_size_msat: 25_000_000_000,    // 0.25 BTC
+	});
+
 	let runtime = match tokio::runtime::Builder::new_multi_thread().enable_all().build() {
 		Ok(runtime) => Arc::new(runtime),
 		Err(e) => {