Merge pull request #1057 from TheBlueMatt/2021-08-invoice-fails

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

diff --git a/lightning/src/ln/features.rs b/lightning/src/ln/features.rs
index e78fa3d50d2d05c5bfcafe1fd58eb1b654c167f7..d1f6b89db4f87e968e3624289331c00c476875fe 100644 (file)
--- a/lightning/src/ln/features.rs
+++ b/lightning/src/ln/features.rs
@@ -25,6 +25,7 @@
 use io;
 use prelude::*;
 use core::{cmp, fmt};
+use core::hash::{Hash, Hasher};
 use core::marker::PhantomData;
 
 use bitcoin::bech32;
@@ -362,6 +363,11 @@ impl<T: sealed::Context> Clone for Features<T> {
                }
        }
 }
+impl<T: sealed::Context> Hash for Features<T> {
+       fn hash<H: Hasher>(&self, hasher: &mut H) {
+               self.flags.hash(hasher);
+       }
+}
 impl<T: sealed::Context> PartialEq for Features<T> {
        fn eq(&self, o: &Self) -> bool {
                self.flags.eq(&o.flags)
@@ -548,7 +554,9 @@ impl<T: sealed::Context> Features<T> {
                &self.flags
        }
 
-       pub(crate) fn requires_unknown_bits(&self) -> bool {
+       /// Returns true if this `Features` object contains unknown feature flags which are set as
+       /// "required".
+       pub fn requires_unknown_bits(&self) -> bool {
                // Bitwise AND-ing with all even bits set except for known features will select required
                // unknown features.
                let byte_count = T::KNOWN_FEATURE_MASK.len();