From: Matt Corallo <git@bluematt.me>
Date: Thu, 10 Feb 2022 21:33:26 +0000 (+0000)
Subject: Correct default value for A* heuristic for non-public nodes
X-Git-Tag: v0.0.105^2~2^2
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=bd1b761655f549daee6b5d2920227ab7bd493b89;p=rust-lightning

Correct default value for A* heuristic for non-public nodes

This doesn't (appear) to change behavior, however if we have a
non-public node, we assign an A* heuristic of max-u32 fees, which
may result in us de-prioritizing the path in some rare cases around
multi-hop route hints which compete with public nodes.
---

diff --git a/lightning/src/routing/router.rs b/lightning/src/routing/router.rs
index c3b042825..ff430a288 100644
--- a/lightning/src/routing/router.rs
+++ b/lightning/src/routing/router.rs
@@ -876,8 +876,8 @@ where L::Target: Logger {
 							// semi-dummy record just to compute the fees to reach the source node.
 							// This will affect our decision on selecting short_channel_id
 							// as a way to reach the $dest_node_id.
-							let mut fee_base_msat = u32::max_value();
-							let mut fee_proportional_millionths = u32::max_value();
+							let mut fee_base_msat = 0;
+							let mut fee_proportional_millionths = 0;
 							if let Some(Some(fees)) = network_nodes.get(&$src_node_id).map(|node| node.lowest_inbound_channel_fees) {
 								fee_base_msat = fees.base_msat;
 								fee_proportional_millionths = fees.proportional_millionths;