From b3af216c1444562a8393024db77eacc1fbb9adba Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Sun, 5 Mar 2023 20:38:42 +0000
Subject: [PATCH] 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.
---
 lightning/src/ln/channel.rs        |  4 ++--
 lightning/src/ln/channelmanager.rs |  2 +-
 lightning/src/ln/msgs.rs           | 11 ++++++-----
 lightning/src/ln/peer_handler.rs   |  2 +-
 4 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs
index 9af0f6379..49fed3fcc 100644
--- a/lightning/src/ln/channel.rs
+++ b/lightning/src/ln/channel.rs
@@ -5471,7 +5471,7 @@ impl<Signer: WriteableEcdsaChannelSigner> Channel<Signer> {
 				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;
@@ -5505,7 +5505,7 @@ impl<Signer: WriteableEcdsaChannelSigner> Channel<Signer> {
 				.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()))?;
 			let our_bitcoin_sig = self.holder_signer.sign_channel_announcement_with_funding_key(&announcement, &self.secp_ctx)
 				.map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
diff --git a/lightning/src/ln/channelmanager.rs b/lightning/src/ln/channelmanager.rs
index 150b94d7c..5681aeaf8 100644
--- a/lightning/src/ln/channelmanager.rs
+++ b/lightning/src/ln/channelmanager.rs
@@ -2432,7 +2432,7 @@ 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 6e49a46f0..be8f0852e 100644
--- a/lightning/src/ln/msgs.rs
+++ b/lightning/src/ln/msgs.rs
@@ -635,16 +635,17 @@ impl Readable for NetAddress {
 }
 
 /// 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 41bbf5b49..2716d619a 100644
--- a/lightning/src/ln/peer_handler.rs
+++ b/lightning/src/ln/peer_handler.rs
@@ -2157,7 +2157,7 @@ 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(_) => {
-- 
2.39.5