Address custom HTLC TLV fixups

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

diff --git a/lightning/src/ln/msgs.rs b/lightning/src/ln/msgs.rs
index b6ec022dc14fed1b62281e3b4358677245f78e33..515dcbba2d2e136846697dc990d582270e07e1d4 100644 (file)
--- a/lightning/src/ln/msgs.rs
+++ b/lightning/src/ln/msgs.rs
@@ -1987,10 +1987,8 @@ impl Writeable for OutboundOnionPayload {
                                // We need to update [`ln::outbound_payment::RecipientOnionFields::with_custom_tlvs`]
                                // to reject any reserved types in the experimental range if new ones are ever
                                // standardized.
-                               let preimage = if let Some(ref preimage) = keysend_preimage {
-                                       Some((5482373484, preimage.encode()))
-                               } else { None };
-                               let mut custom_tlvs: Vec<&(u64, Vec<u8>)> = custom_tlvs.iter().chain(preimage.iter()).collect();
+                               let keysend_tlv = keysend_preimage.map(|preimage| (5482373484, preimage.encode()));
+                               let mut custom_tlvs: Vec<&(u64, Vec<u8>)> = custom_tlvs.iter().chain(keysend_tlv.iter()).collect();
                                custom_tlvs.sort_unstable_by_key(|(typ, _)| *typ);
                                _encode_varint_length_prefixed_tlv!(w, {
                                        (2, HighZeroBytesDroppedBigSize(*amt_msat), required),