X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Fmsgs.rs;h=01a4378456498d7c20706784da60ea13790e3d26;hb=65e588fd927d06110e4c1efdd20e1f95d2041027;hp=9fb3a069570424cad1c5fcf6ed2db4cba19ef1b4;hpb=8ec5429f0f9405634726c4388e34ef4acfbbf7eb;p=rust-lightning

diff --git a/lightning/src/ln/msgs.rs b/lightning/src/ln/msgs.rs
index 9fb3a069..01a43784 100644
--- a/lightning/src/ln/msgs.rs
+++ b/lightning/src/ln/msgs.rs
@@ -543,7 +543,14 @@ pub struct UnsignedChannelUpdate {
 	pub timestamp: u32,
 	/// Channel flags
 	pub flags: u8,
-	/// The number of blocks to subtract from incoming HTLC cltv_expiry values
+	/// The number of blocks such that if:
+	/// `incoming_htlc.cltv_expiry < outgoing_htlc.cltv_expiry + cltv_expiry_delta`
+	/// then we need to fail the HTLC backwards. When forwarding an HTLC, cltv_expiry_delta determines
+	/// the outgoing HTLC's minimum cltv_expiry value -- so, if an incoming HTLC comes in with a
+	/// cltv_expiry of 100000, and the node we're forwarding to has a cltv_expiry_delta value of 10,
+	/// then we'll check that the outgoing HTLC's cltv_expiry value is at least 100010 before
+	/// forwarding. Note that the HTLC sender is the one who originally sets this value when
+	/// constructing the route.
 	pub cltv_expiry_delta: u16,
 	/// The minimum HTLC size incoming to sender, in milli-satoshi
 	pub htlc_minimum_msat: u64,
@@ -789,6 +796,9 @@ pub trait ChannelMessageHandler : MessageSendEventsProvider + Send + Sync {
 	/// Handle an incoming channel_reestablish message from the given peer.
 	fn handle_channel_reestablish(&self, their_node_id: &PublicKey, msg: &ChannelReestablish);
 
+	/// Handle an incoming channel update from the given peer.
+	fn handle_channel_update(&self, their_node_id: &PublicKey, msg: &ChannelUpdate);
+
 	// Error:
 	/// Handle an incoming error message from the given peer.
 	fn handle_error(&self, their_node_id: &PublicKey, msg: &ErrorMessage);
@@ -1690,7 +1700,7 @@ impl QueryChannelRange {
 	pub fn end_blocknum(&self) -> u32 {
 		match self.first_blocknum.checked_add(self.number_of_blocks) {
 			Some(block) => block,
-			None => 0xffffffff,
+			None => u32::max_value(),
 		}
 	}
 }