Merge pull request #651 from naumenkogs/2020-06-routing-data-improvements

[rust-lightning] / lightning / src / ln / channel.rs

diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs
index fc3b4fd81746f7dc878a0bf138735ee805026c01..c416c676d78c514723c19e93a77446233ad5a810 100644 (file)
--- a/lightning/src/ln/channel.rs
+++ b/lightning/src/ln/channel.rs
@@ -3128,6 +3128,18 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                self.our_htlc_minimum_msat
        }
 
+       /// Allowed in any state (including after shutdown)
+       pub fn get_announced_htlc_max_msat(&self) -> u64 {
+               return cmp::min(
+                       // Upper bound by capacity. We make it a bit less than full capacity to prevent attempts
+                       // to use full capacity. This is an effort to reduce routing failures, because in many cases
+                       // channel might have been used to route very small values (either by honest users or as DoS).
+                       self.channel_value_satoshis * 9 / 10,
+
+                       Channel::<ChanSigner>::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis)
+               );
+       }
+
        /// Allowed in any state (including after shutdown)
        pub fn get_their_htlc_minimum_msat(&self) -> u64 {
                self.our_htlc_minimum_msat