f add more comment

Author: TheBlueMatt

lightning-invoice/src/utils.rs

@@ -569,7 +569,12 @@ fn filter_channels<L: Deref>(
 		match filtered_channels.entry(channel.counterparty.node_id) {
 			hash_map::Entry::Occupied(mut entry) => {
 				let current_max_capacity = entry.get().inbound_capacity_msat;
+				// If this channel is public and the previous channel is not, ensure we replace the
+				// previous channel to avoid announcing non-public channels.
 				let new_now_public = channel.is_public && !entry.get().is_public;
+				// If the public-ness of the channel has not changed (in which case simply defer to
+				// `new_now_public), and this channel has a greater capacity, prefer to announce
+				// this channel.
 				let new_higher_capacity = channel.is_public == entry.get().is_public &&
 					channel.inbound_capacity_msat > current_max_capacity;
 				if new_now_public || new_higher_capacity {