Ensure `Event::BumpTransaction` is forwards-compatible

`Event`s with an odd type are ignored by older versions of LDK,
however they rely on the `write_tlv_fields` call to know how many
bytes to read and discard. We were missing that call in our writing
of `Event::BumpTransaction`, which we add here.

diff --git a/lightning/src/util/events.rs b/lightning/src/util/events.rs
index 2c7e5413dafff9d9f027eab116d0967faae6ed2e..375174f6f6afa86c556c6804586adfa52020844a 100644 (file)
--- a/lightning/src/util/events.rs
+++ b/lightning/src/util/events.rs
@@ -1125,6 +1125,7 @@ impl Writeable for Event {
                                        BumpTransactionEvent::ChannelClose { .. } => {}
                                        BumpTransactionEvent::HTLCResolution { .. } => {}
                                }
+                               write_tlv_fields!(writer, {}); // Write a length field for forwards compat
                        }
                        &Event::ChannelReady { ref channel_id, ref user_channel_id, ref counterparty_node_id, ref channel_type } => {
                                29u8.write(writer)?;