From: Matt Corallo <git@bluematt.me>
Date: Sun, 14 Oct 2018 20:37:21 +0000 (+0900)
Subject: Ensure channel is live, not usable for sending fee updates
X-Git-Tag: v0.0.12~292^2~2
X-Git-Url: http://git.bitcoin.ninja/?a=commitdiff_plain;h=df88525d44563e44201bbfd745ffc57614f14c30;p=rust-lightning

Ensure channel is live, not usable for sending fee updates

+ a freebie TODO removal
---

diff --git a/src/ln/channel.rs b/src/ln/channel.rs
index 5c861b2ea..1b7db97d3 100644
--- a/src/ln/channel.rs
+++ b/src/ln/channel.rs
@@ -1960,10 +1960,12 @@ impl Channel {
 		if !self.channel_outbound {
 			panic!("Cannot send fee from inbound channel");
 		}
-
 		if !self.is_usable() {
 			panic!("Cannot update fee until channel is fully established and we haven't started shutting down");
 		}
+		if !self.is_live() {
+			panic!("Cannot update fee while peer is disconnected (ChannelManager should have caught this)");
+		}
 
 		if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
 			self.holding_cell_update_fee = Some(feerate_per_kw);
diff --git a/src/ln/channelmanager.rs b/src/ln/channelmanager.rs
index b967a6774..d0df159e2 100644
--- a/src/ln/channelmanager.rs
+++ b/src/ln/channelmanager.rs
@@ -1000,7 +1000,7 @@ impl ChannelManager {
 		};
 
 		let msg_hash = Sha256dHash::from_data(&unsigned.encode()[..]);
-		let sig = self.secp_ctx.sign(&Message::from_slice(&msg_hash[..]).unwrap(), &self.our_network_key); //TODO Can we unwrap here?
+		let sig = self.secp_ctx.sign(&Message::from_slice(&msg_hash[..]).unwrap(), &self.our_network_key);
 
 		Ok(msgs::ChannelUpdate {
 			signature: sig,
@@ -1105,7 +1105,6 @@ impl ChannelManager {
 	/// May panic if the funding_txo is duplicative with some other channel (note that this should
 	/// be trivially prevented by using unique funding transaction keys per-channel).
 	pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], funding_txo: OutPoint) {
-
 		macro_rules! add_pending_event {
 			($event: expr) => {
 				{
@@ -2001,7 +2000,7 @@ impl ChannelManager {
 		match channel_state.by_id.get_mut(&channel_id) {
 			None => return Err(APIError::APIMisuseError{err: "Failed to find corresponding channel"}),
 			Some(chan) => {
-				if !chan.is_usable() {
+				if !chan.is_live() {
 					return Err(APIError::APIMisuseError{err: "Channel is not in usuable state"});
 				}
 				if !chan.is_outbound() {