Add test for duplicate keysend payment

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

diff --git a/lightning/src/ln/features.rs b/lightning/src/ln/features.rs
index 7d4b86f5acabf6ae81d5f0df9b13f3090fb11d29..d24d32ba0fa039dd9356621ec66839b2c59ffc28 100644 (file)
--- a/lightning/src/ln/features.rs
+++ b/lightning/src/ln/features.rs
@@ -533,11 +533,17 @@ impl InvoiceFeatures {
        /// [`PaymentParameters::for_keysend`], thus omitting the need for payers to manually construct an
        /// `InvoiceFeatures` for [`find_route`].
        ///
+       /// MPP keysend is not widely supported yet, so we parameterize support to allow the user to
+       /// choose whether their router should find multi-part routes.
+       ///
        /// [`PaymentParameters::for_keysend`]: crate::routing::router::PaymentParameters::for_keysend
        /// [`find_route`]: crate::routing::router::find_route
-       pub(crate) fn for_keysend() -> InvoiceFeatures {
+       pub(crate) fn for_keysend(allow_mpp: bool) -> InvoiceFeatures {
                let mut res = InvoiceFeatures::empty();
                res.set_variable_length_onion_optional();
+               if allow_mpp {
+                       res.set_basic_mpp_optional();
+               }
                res
        }
 }