From 5019b31b286398ecdee773afe203a5417a97bd65 Mon Sep 17 00:00:00 2001
From: Max Fang <protonmail.com@maxfa.ng>
Date: Tue, 19 Jul 2022 21:57:12 -0700
Subject: [PATCH] lightning-net-tokio: Allow custom smart pointers

---
 lightning-net-tokio/src/lib.rs | 76 +++++++++++++++++++++++-----------
 1 file changed, 51 insertions(+), 25 deletions(-)

diff --git a/lightning-net-tokio/src/lib.rs b/lightning-net-tokio/src/lib.rs
index 2ac10762b..645a7434e 100644
--- a/lightning-net-tokio/src/lib.rs
+++ b/lightning-net-tokio/src/lib.rs
@@ -84,6 +84,7 @@ use lightning::ln::peer_handler::CustomMessageHandler;
 use lightning::ln::msgs::{ChannelMessageHandler, RoutingMessageHandler, NetAddress};
 use lightning::util::logger::Logger;
 
+use std::ops::Deref;
 use std::task;
 use std::net::SocketAddr;
 use std::net::TcpStream as StdTcpStream;
@@ -120,11 +121,16 @@ struct Connection {
 	id: u64,
 }
 impl Connection {
-	async fn poll_event_process<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, mut event_receiver: mpsc::Receiver<()>) where
-			CMH: ChannelMessageHandler + 'static + Send + Sync,
-			RMH: RoutingMessageHandler + 'static + Send + Sync,
-			L: Logger + 'static + ?Sized + Send + Sync,
-			UMH: CustomMessageHandler + 'static + Send + Sync {
+	async fn poll_event_process<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, L, UMH>>, mut event_receiver: mpsc::Receiver<()>) where
+			CMH: Deref + 'static + Send + Sync,
+			RMH: Deref + 'static + Send + Sync,
+			L: Deref + 'static + Send + Sync,
+			UMH: Deref + 'static + Send + Sync,
+			CMH::Target: ChannelMessageHandler + Send + Sync,
+			RMH::Target: RoutingMessageHandler + Send + Sync,
+			L::Target: Logger + Send + Sync,
+			UMH::Target: CustomMessageHandler + Send + Sync,
+    {
 		loop {
 			if event_receiver.recv().await.is_none() {
 				return;
@@ -133,11 +139,16 @@ impl Connection {
 		}
 	}
 
-	async fn schedule_read<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, us: Arc<Mutex<Self>>, mut reader: io::ReadHalf<TcpStream>, mut read_wake_receiver: mpsc::Receiver<()>, mut write_avail_receiver: mpsc::Receiver<()>) where
-			CMH: ChannelMessageHandler + 'static + Send + Sync,
-			RMH: RoutingMessageHandler + 'static + Send + Sync,
-			L: Logger + 'static + ?Sized + Send + Sync,
-			UMH: CustomMessageHandler + 'static + Send + Sync {
+	async fn schedule_read<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, L, UMH>>, us: Arc<Mutex<Self>>, mut reader: io::ReadHalf<TcpStream>, mut read_wake_receiver: mpsc::Receiver<()>, mut write_avail_receiver: mpsc::Receiver<()>) where
+			CMH: Deref + 'static + Send + Sync,
+			RMH: Deref + 'static + Send + Sync,
+			L: Deref + 'static + Send + Sync,
+			UMH: Deref + 'static + Send + Sync,
+			CMH::Target: ChannelMessageHandler + 'static + Send + Sync,
+			RMH::Target: RoutingMessageHandler + 'static + Send + Sync,
+			L::Target: Logger + 'static + Send + Sync,
+			UMH::Target: CustomMessageHandler + 'static + Send + Sync,
+        {
 		// Create a waker to wake up poll_event_process, above
 		let (event_waker, event_receiver) = mpsc::channel(1);
 		tokio::spawn(Self::poll_event_process(Arc::clone(&peer_manager), event_receiver));
@@ -255,11 +266,16 @@ fn get_addr_from_stream(stream: &StdTcpStream) -> Option<NetAddress> {
 /// The returned future will complete when the peer is disconnected and associated handling
 /// futures are freed, though, because all processing futures are spawned with tokio::spawn, you do
 /// not need to poll the provided future in order to make progress.
-pub fn setup_inbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
-		CMH: ChannelMessageHandler + 'static + Send + Sync,
-		RMH: RoutingMessageHandler + 'static + Send + Sync,
-		L: Logger + 'static + ?Sized + Send + Sync,
-		UMH: CustomMessageHandler + 'static + Send + Sync {
+pub fn setup_inbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, L, UMH>>, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
+		CMH: Deref + 'static + Send + Sync,
+		RMH: Deref + 'static + Send + Sync,
+		L: Deref + 'static + Send + Sync,
+		UMH: Deref + 'static + Send + Sync,
+		CMH::Target: ChannelMessageHandler + Send + Sync,
+		RMH::Target: RoutingMessageHandler + Send + Sync,
+		L::Target: Logger + Send + Sync,
+		UMH::Target: CustomMessageHandler + Send + Sync,
+{
 	let remote_addr = get_addr_from_stream(&stream);
 	let (reader, write_receiver, read_receiver, us) = Connection::new(stream);
 	#[cfg(debug_assertions)]
@@ -297,11 +313,16 @@ pub fn setup_inbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManag
 /// The returned future will complete when the peer is disconnected and associated handling
 /// futures are freed, though, because all processing futures are spawned with tokio::spawn, you do
 /// not need to poll the provided future in order to make progress.
-pub fn setup_outbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, their_node_id: PublicKey, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
-		CMH: ChannelMessageHandler + 'static + Send + Sync,
-		RMH: RoutingMessageHandler + 'static + Send + Sync,
-		L: Logger + 'static + ?Sized + Send + Sync,
-		UMH: CustomMessageHandler + 'static + Send + Sync {
+pub fn setup_outbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, L, UMH>>, their_node_id: PublicKey, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
+		CMH: Deref + 'static + Send + Sync,
+		RMH: Deref + 'static + Send + Sync,
+		L: Deref + 'static + Send + Sync,
+		UMH: Deref + 'static + Send + Sync,
+		CMH::Target: ChannelMessageHandler + Send + Sync,
+		RMH::Target: RoutingMessageHandler + Send + Sync,
+		L::Target: Logger + Send + Sync,
+		UMH::Target: CustomMessageHandler + Send + Sync,
+{
 	let remote_addr = get_addr_from_stream(&stream);
 	let (reader, mut write_receiver, read_receiver, us) = Connection::new(stream);
 	#[cfg(debug_assertions)]
@@ -368,11 +389,16 @@ pub fn setup_outbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerMana
 /// disconnected and associated handling futures are freed, though, because all processing in said
 /// futures are spawned with tokio::spawn, you do not need to poll the second future in order to
 /// make progress.
-pub async fn connect_outbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, their_node_id: PublicKey, addr: SocketAddr) -> Option<impl std::future::Future<Output=()>> where
-		CMH: ChannelMessageHandler + 'static + Send + Sync,
-		RMH: RoutingMessageHandler + 'static + Send + Sync,
-		L: Logger + 'static + ?Sized + Send + Sync,
-		UMH: CustomMessageHandler + 'static + Send + Sync {
+pub async fn connect_outbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, L, UMH>>, their_node_id: PublicKey, addr: SocketAddr) -> Option<impl std::future::Future<Output=()>> where
+		CMH: Deref + 'static + Send + Sync,
+		RMH: Deref + 'static + Send + Sync,
+		L: Deref + 'static + Send + Sync,
+		UMH: Deref + 'static + Send + Sync,
+		CMH::Target: ChannelMessageHandler + Send + Sync,
+		RMH::Target: RoutingMessageHandler + Send + Sync,
+		L::Target: Logger + Send + Sync,
+		UMH::Target: CustomMessageHandler + Send + Sync,
+{
 	if let Ok(Ok(stream)) = time::timeout(Duration::from_secs(10), async { TcpStream::connect(&addr).await.map(|s| s.into_std().unwrap()) }).await {
 		Some(setup_outbound(peer_manager, their_node_id, stream))
 	} else { None }
-- 
2.39.5