Introduce SendOnlyMessageHandler trait
#3922
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I've assigned @joostjager as a reviewer! |
joostjager
reviewed
Jul 10, 2025
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👋 The first review has been submitted! Do you think this PR is ready for a second reviewer? If so, click here to assign a second reviewer. |
joostjager
reviewed
Jul 10, 2025
Previously, we introduced a new `send_only_message_handler: BaseMessageHandler` field to `MessageHandler`, which we expect to only ever be implemented by `ChainMonitor`. However, given that more objects implement `BaseMessageHandler`, the API allowed to plugin different objects, such as `ChannelManager`, resulting in unexpected behavior. Here, we resolve this by introducing a new super trait `SendOnlyMessageHandler` that is only implemented by `ChainMonitor`.
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Force-pushed the following fixup: > git diff-tree -U2 3da136849 1e99cdbdd
diff --git a/lightning/src/ln/msgs.rs b/lightning/src/ln/msgs.rs
index 8a7febe4c..da5cdf7c9 100644
--- a/lightning/src/ln/msgs.rs
+++ b/lightning/src/ln/msgs.rs
@@ -2180,5 +2180,5 @@ pub trait OnionMessageHandler: BaseMessageHandler {
/// A handler which can only be used to send messages.
///
-/// This is mostly implemented by [`ChainMonitor`].
+/// This is implemented by [`ChainMonitor`].
///
/// [`ChainMonitor`]: crate::chain::chainmonitor::ChainMonitor |
joostjager
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Jul 10, 2025
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Given we recently decided to more often merge with 1 review for simple changes, I'm going to land this. |
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Previously, we introduced a new
send_only_message_handler: BaseMessageHandlerfield toMessageHandler, which we expect to only ever be implemented byChainMonitor.However, given that more objects implement
BaseMessageHandler, the API allowed to plugin different objects, such asChannelManager, resulting in unexpected behavior.Here, we resolve this by introducing a new super trait
SendOnlyMessageHandlerthat is only implemented byChainMonitor.(cc @adi2011)