Bound Persister's WriteableScore by Deref

This makes the trait marginally more flexible, but more importantly
matches our normal structure which makes the bindings generator a
bit happier.

Author: TheBlueMatt

lightning-background-processor/src/lib.rs

@@ -935,7 +935,7 @@ impl BackgroundProcessor {
 		F::Target: 'static + FeeEstimator,
 		L::Target: 'static + Logger,
 		P::Target: 'static + Persist<<CM::Target as AChannelManager>::Signer>,
-		PS::Target: 'static + Persister<'a, CM, L, SC>,
+		PS::Target: 'static + Persister<'a, CM, L, S>,
 		CM::Target: AChannelManager + Send + Sync,
 		OM::Target: AOnionMessenger + Send + Sync,
 		PM::Target: APeerManager + Send + Sync,

lightning/src/util/persist.rs

@@ -157,10 +157,11 @@ pub trait KVStore {
 /// Trait that handles persisting a [`ChannelManager`], [`NetworkGraph`], and [`WriteableScore`] to disk.
 ///
 /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
-pub trait Persister<'a, CM: Deref, L: Deref, S: WriteableScore<'a>>
+pub trait Persister<'a, CM: Deref, L: Deref, S: Deref>
 where
 	CM::Target: 'static + AChannelManager,
 	L::Target: 'static + Logger,
+	S::Target: WriteableScore<'a>,
 {
 	/// Persist the given ['ChannelManager'] to disk, returning an error if persistence failed.
 	///
@@ -175,10 +176,11 @@ where
 }
 
 
-impl<'a, A: KVStore + ?Sized, CM: Deref, L: Deref, S: WriteableScore<'a>> Persister<'a, CM, L, S> for A
+impl<'a, A: KVStore + ?Sized, CM: Deref, L: Deref, S: Deref> Persister<'a, CM, L, S> for A
 where
 	CM::Target: 'static + AChannelManager,
 	L::Target: 'static + Logger,
+	S::Target: WriteableScore<'a>,
 {
 	fn persist_manager(&self, channel_manager: &CM) -> Result<(), io::Error> {
 		self.write(CHANNEL_MANAGER_PERSISTENCE_PRIMARY_NAMESPACE,