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.

Author: TheBlueMatt

lightning/src/ln/channel.rs

@@ -5539,7 +5539,7 @@ 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;
@@ -5573,7 +5573,7 @@ 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()))?;

lightning/src/ln/channelmanager.rs

@@ -2650,7 +2650,7 @@ 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,

lightning/src/ln/msgs.rs

@@ -658,16 +658,17 @@ 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),

lightning/src/ln/peer_handler.rs

@@ -2160,7 +2160,7 @@ 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(_) => {

lightning/src/ln/priv_short_conf_tests.rs

@@ -506,7 +506,7 @@ 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();