Honor LSP trust_peer_0conf independent of supported protocols

Look up trust_peer_0conf by node id via a protocol-independent helper
that does not depend on discovery

Author: Camillarhi

src/event.rs

@@ -1327,14 +1327,15 @@ where
 				);
 				let mut allow_0conf =
 					self.config.trusted_peers_0conf.contains(&counterparty_node_id);
-				let mut channel_override_config = None;
 
 				// If the peer is a configured LSP node, additionally honor its trust_peer_0conf flag.
-				if let Some(lsp) =
-					self.liquidity_source.get_lsp_config(&counterparty_node_id, 2).await
-				{
-					allow_0conf = allow_0conf || lsp.trust_peer_0conf;
+				if self.liquidity_source.get_lsp_trust_0conf(&counterparty_node_id) == Some(true) {
+					allow_0conf = true;
+				}
+
+				let mut channel_override_config = None;
 
+				if self.liquidity_source.get_lsp_config(&counterparty_node_id, 2).await.is_some() {
 					// When we're an LSPS2 client, allow claiming underpaying HTLCs as the LSP will skim off some fee. We'll
 					// check that they don't take too much before claiming.
 					channel_override_config = Some(ChannelConfigOverrides {

src/liquidity/mod.rs

@@ -523,6 +523,15 @@ where
 			.collect()
 	}
 
+	pub(crate) fn get_lsp_trust_0conf(&self, node_id: &PublicKey) -> Option<bool> {
+		self.lsp_nodes
+			.read()
+			.expect("lock")
+			.iter()
+			.find(|n| &n.node_id == node_id)
+			.map(|n| n.trust_peer_0conf)
+	}
+
 	/// Flips the `discovery_done` watch to `true`.
 	///
 	/// Called once after the *initial* batch of LSPs configured at build time has been