Merge pull request #4134 from TheBlueMatt/2025-09-async-misc

Misc async API fixes

Author: tnull

lightning/src/sign/mod.rs

@@ -1041,7 +1041,7 @@ pub trait ChangeDestinationSource {
 	///
 	/// This method should return a different value each time it is called, to avoid linking
 	/// on-chain funds controlled to the same user.
-	fn get_change_destination_script<'a>(&self) -> AsyncResult<'a, ScriptBuf>;
+	fn get_change_destination_script<'a>(&'a self) -> AsyncResult<'a, ScriptBuf>;
 }
 
 /// A synchronous helper trait that describes an on-chain wallet capable of returning a (change) destination script.
@@ -1073,7 +1073,7 @@ impl<T: Deref> ChangeDestinationSource for ChangeDestinationSourceSyncWrapper<T>
 where
 	T::Target: ChangeDestinationSourceSync,
 {
-	fn get_change_destination_script<'a>(&self) -> AsyncResult<'a, ScriptBuf> {
+	fn get_change_destination_script<'a>(&'a self) -> AsyncResult<'a, ScriptBuf> {
 		let script = self.0.get_change_destination_script();
 		Box::pin(async move { script })
 	}

lightning/src/util/async_poll.rs

@@ -92,25 +92,29 @@ pub(crate) fn dummy_waker() -> Waker {
 	unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &DUMMY_WAKER_VTABLE)) }
 }
 
-/// A type alias for a future that returns a result of type T.
 #[cfg(feature = "std")]
+/// A type alias for a future that returns a result of type T.
 pub type AsyncResult<'a, T> = Pin<Box<dyn Future<Output = Result<T, ()>> + 'a + Send>>;
 #[cfg(not(feature = "std"))]
+/// A type alias for a future that returns a result of type T.
 pub type AsyncResult<'a, T> = Pin<Box<dyn Future<Output = Result<T, ()>> + 'a>>;
 
-// Marker trait to optionally implement `Sync` under std.
+/// Marker trait to optionally implement `Sync` under std.
 #[cfg(feature = "std")]
 pub use core::marker::Sync as MaybeSync;
 
 #[cfg(not(feature = "std"))]
+/// Marker trait to optionally implement `Sync` under std.
 pub trait MaybeSync {}
 #[cfg(not(feature = "std"))]
 impl<T> MaybeSync for T where T: ?Sized {}
 
-// Marker trait to optionally implement `Send` under std.
+/// Marker trait to optionally implement `Send` under std.
 #[cfg(feature = "std")]
 pub use core::marker::Send as MaybeSend;
+
 #[cfg(not(feature = "std"))]
+/// Marker trait to optionally implement `Send` under std.
 pub trait MaybeSend {}
 #[cfg(not(feature = "std"))]
 impl<T> MaybeSend for T where T: ?Sized {}

lightning/src/util/mod.rs

@@ -20,6 +20,7 @@ pub mod mut_global;
 
 pub mod anchor_channel_reserves;
 
+pub mod async_poll;
 #[cfg(fuzzing)]
 pub mod base32;
 #[cfg(not(fuzzing))]
@@ -33,7 +34,6 @@ pub mod ser;
 pub mod sweep;
 pub mod wakers;
 
-pub(crate) mod async_poll;
 pub(crate) mod atomic_counter;
 pub(crate) mod byte_utils;
 pub mod hash_tables;