From: Matt Corallo <git@bluematt.me>
Date: Sun, 5 Mar 2023 20:38:42 +0000 (+0000)
Subject: Avoid enums containing references with lifetimes
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=5938e6379cd00216e73fe46f8ce9f4e6c03f051c;p=rust-lightning

Avoid enums containing references with lifetimes

Having struct fields with references to other structs is tough in
our bindings logic, but even worse if the fields are in an enum.
Its simplest to just take the clone penalty here.
---

diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs
index ec4f26664..ffac09b75 100644
--- a/lightning/src/ln/channel.rs
+++ b/lightning/src/ln/channel.rs
@@ -5604,7 +5604,7 @@ impl<SP: Deref> Channel<SP> where
 				return None;
 			}
 		};
-		let our_node_sig = match node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelAnnouncement(&announcement)) {
+		let our_node_sig = match node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelAnnouncement(announcement.clone())) {
 			Err(_) => {
 				log_error!(logger, "Failed to generate node signature for channel_announcement. Channel will not be announced!");
 				return None;
@@ -5650,7 +5650,7 @@ impl<SP: Deref> Channel<SP> where
 				.map_err(|_| ChannelError::Ignore("Signer failed to retrieve own public key".to_owned()))?);
 			let were_node_one = announcement.node_id_1 == our_node_key;
 
-			let our_node_sig = node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelAnnouncement(&announcement))
+			let our_node_sig = node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelAnnouncement(announcement.clone()))
 				.map_err(|_| ChannelError::Ignore("Failed to generate node signature for channel_announcement".to_owned()))?;
 			match &self.context.holder_signer {
 				ChannelSignerType::Ecdsa(ecdsa) => {
diff --git a/lightning/src/ln/channelmanager.rs b/lightning/src/ln/channelmanager.rs
index 817fb0c63..7d1cd12b2 100644
--- a/lightning/src/ln/channelmanager.rs
+++ b/lightning/src/ln/channelmanager.rs
@@ -3332,7 +3332,7 @@ where
 		// If we returned an error and the `node_signer` cannot provide a signature for whatever
 		// reason`, we wouldn't be able to receive inbound payments through the corresponding
 		// channel.
-		let sig = self.node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelUpdate(&unsigned)).unwrap();
+		let sig = self.node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelUpdate(unsigned.clone())).unwrap();
 
 		Ok(msgs::ChannelUpdate {
 			signature: sig,
diff --git a/lightning/src/ln/msgs.rs b/lightning/src/ln/msgs.rs
index d39f1a608..e833e3ebf 100644
--- a/lightning/src/ln/msgs.rs
+++ b/lightning/src/ln/msgs.rs
@@ -1132,16 +1132,17 @@ impl FromStr for SocketAddress {
 }
 
 /// Represents the set of gossip messages that require a signature from a node's identity key.
-pub enum UnsignedGossipMessage<'a> {
+#[derive(Clone)]
+pub enum UnsignedGossipMessage {
 	/// An unsigned channel announcement.
-	ChannelAnnouncement(&'a UnsignedChannelAnnouncement),
+	ChannelAnnouncement(UnsignedChannelAnnouncement),
 	/// An unsigned channel update.
-	ChannelUpdate(&'a UnsignedChannelUpdate),
+	ChannelUpdate(UnsignedChannelUpdate),
 	/// An unsigned node announcement.
-	NodeAnnouncement(&'a UnsignedNodeAnnouncement)
+	NodeAnnouncement(UnsignedNodeAnnouncement)
 }
 
-impl<'a> Writeable for UnsignedGossipMessage<'a> {
+impl Writeable for UnsignedGossipMessage {
 	fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
 		match self {
 			UnsignedGossipMessage::ChannelAnnouncement(ref msg) => msg.write(writer),
diff --git a/lightning/src/ln/peer_handler.rs b/lightning/src/ln/peer_handler.rs
index c3a50fd24..77208921c 100644
--- a/lightning/src/ln/peer_handler.rs
+++ b/lightning/src/ln/peer_handler.rs
@@ -2542,7 +2542,7 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, OM: Deref, L: Deref, CM
 			excess_data: Vec::new(),
 		};
 		let node_announce_sig = match self.node_signer.sign_gossip_message(
-			msgs::UnsignedGossipMessage::NodeAnnouncement(&announcement)
+			msgs::UnsignedGossipMessage::NodeAnnouncement(announcement.clone())
 		) {
 			Ok(sig) => sig,
 			Err(_) => {
diff --git a/lightning/src/ln/priv_short_conf_tests.rs b/lightning/src/ln/priv_short_conf_tests.rs
index 85e757204..beb9ba49e 100644
--- a/lightning/src/ln/priv_short_conf_tests.rs
+++ b/lightning/src/ln/priv_short_conf_tests.rs
@@ -516,7 +516,7 @@ fn test_scid_alias_returned() {
 		fee_proportional_millionths: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_proportional_millionths,
 		excess_data: Vec::new(),
 	};
-	let signature = nodes[1].keys_manager.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelUpdate(&contents)).unwrap();
+	let signature = nodes[1].keys_manager.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelUpdate(contents.clone())).unwrap();
 	let msg = msgs::ChannelUpdate { signature, contents };
 
 	let mut err_data = Vec::new();