Support client_trusts_lsp on LSPS2

Author: martinsaposnic

fuzz/src/lsps_message.rs

@@ -82,6 +82,7 @@ pub fn do_test(data: &[u8]) {
 		Arc::clone(&keys_manager),
 		Arc::clone(&manager),
 		None::<Arc<dyn Filter + Send + Sync>>,
+		Arc::clone(&tx_broadcaster),
 		None,
 		None,
 		None,

lightning-background-processor/src/lib.rs

@@ -426,6 +426,8 @@ pub const NO_LIQUIDITY_MANAGER: Option<
 				C = &dyn chain::Filter,
 				TimeProvider = dyn lightning_liquidity::utils::time::TimeProvider,
 				TP = &dyn lightning_liquidity::utils::time::TimeProvider,
+				BroadcasterInterface = dyn BroadcasterInterface,
+				T = &dyn BroadcasterInterface,
 			> + Send
 			+ Sync,
 	>,
@@ -731,7 +733,7 @@ use futures_util::{dummy_waker, Joiner, OptionalSelector, Selector, SelectorOutp
 /// # type P2PGossipSync<UL> = lightning::routing::gossip::P2PGossipSync<Arc<NetworkGraph>, Arc<UL>, Arc<Logger>>;
 /// # type ChannelManager<B, F, FE> = lightning::ln::channelmanager::SimpleArcChannelManager<ChainMonitor<B, F, FE>, B, FE, Logger>;
 /// # type OnionMessenger<B, F, FE> = lightning::onion_message::messenger::OnionMessenger<Arc<lightning::sign::KeysManager>, Arc<lightning::sign::KeysManager>, Arc<Logger>, Arc<ChannelManager<B, F, FE>>, Arc<lightning::onion_message::messenger::DefaultMessageRouter<Arc<NetworkGraph>, Arc<Logger>, Arc<lightning::sign::KeysManager>>>, Arc<ChannelManager<B, F, FE>>, lightning::ln::peer_handler::IgnoringMessageHandler, lightning::ln::peer_handler::IgnoringMessageHandler, lightning::ln::peer_handler::IgnoringMessageHandler>;
-/// # type LiquidityManager<B, F, FE> = lightning_liquidity::LiquidityManager<Arc<lightning::sign::KeysManager>, Arc<lightning::sign::KeysManager>, Arc<ChannelManager<B, F, FE>>, Arc<F>, Arc<DefaultTimeProvider>>;
+/// # type LiquidityManager<B, F, FE> = lightning_liquidity::LiquidityManager<Arc<lightning::sign::KeysManager>, Arc<lightning::sign::KeysManager>, Arc<ChannelManager<B, F, FE>>, Arc<F>, Arc<DefaultTimeProvider>, Arc<B>>;
 /// # type Scorer = RwLock<lightning::routing::scoring::ProbabilisticScorer<Arc<NetworkGraph>, Arc<Logger>>>;
 /// # type PeerManager<B, F, FE, UL> = lightning::ln::peer_handler::SimpleArcPeerManager<SocketDescriptor, ChainMonitor<B, F, FE>, B, FE, Arc<UL>, Logger, F, StoreSync>;
 /// # type OutputSweeper<B, D, FE, F, O> = lightning::util::sweep::OutputSweeper<Arc<B>, Arc<D>, Arc<FE>, Arc<F>, Arc<Store>, Arc<Logger>, Arc<O>>;
@@ -1896,6 +1898,7 @@ mod tests {
 		Arc<ChannelManager>,
 		Arc<dyn Filter + Sync + Send>,
 		Arc<DefaultTimeProvider>,
+		Arc<test_utils::TestBroadcaster>,
 	>;
 
 	struct Node {
@@ -2347,6 +2350,7 @@ mod tests {
 				Arc::clone(&keys_manager),
 				Arc::clone(&manager),
 				None,
+				Arc::clone(&tx_broadcaster),
 				None,
 				None,
 				None,

lightning-liquidity/src/lsps2/msgs.rs

@@ -171,7 +171,14 @@ pub struct LSPS2BuyResponse {
 	pub jit_channel_scid: LSPS2InterceptScid,
 	/// The locktime expiry delta the lsp requires.
 	pub lsp_cltv_expiry_delta: u32,
-	/// A flag that indicates who is trusting who.
+	/// Trust model flag (default: false).
+	///
+	/// false => "LSP trusts client": LSP immediately (or as soon as safe) broadcasts the
+	///          funding transaction; client may wait for broadcast / confirmations
+	///          before revealing the preimage.
+	/// true  => "Client trusts LSP": LSP may defer broadcasting until after the client
+	///          reveals the preimage; client MUST send the preimage once HTLC(s) are
+	///          irrevocably committed.
 	#[serde(default)]
 	pub client_trusts_lsp: bool,
 }