Pass counterparty_node_id to accept_inbound_channel

Author: ViktorT-11

lightning/src/ln/channelmanager.rs

@@ -4112,15 +4112,17 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
 	/// Called to accept a request to open a channel after [`Event::OpenChannelRequest`] has been
 	/// triggered.
 	///
-	/// The `temporary_channel_id` parameter indicates which inbound channel should be accepted.
+	/// The `temporary_channel_id` parameter indicates which inbound channel should be accepted,
+	/// and the `counterparty_node_id` parameter is the id of the peer which has requested to open
+	/// the channel.
 	///
 	/// For inbound channels, the `user_channel_id` parameter will be provided back in
 	/// [`Event::ChannelClosed::user_channel_id`] to allow tracking of which events correspond
 	/// with which `accept_inbound_channel` call.
 	///
 	/// [`Event::OpenChannelRequest`]: events::Event::OpenChannelRequest
 	/// [`Event::ChannelClosed::user_channel_id`]: events::Event::ChannelClosed::user_channel_id
-	pub fn accept_inbound_channel(&self, temporary_channel_id: &[u8; 32], user_channel_id: u64) -> Result<(), APIError> {
+	pub fn accept_inbound_channel(&self, temporary_channel_id: &[u8; 32], counterparty_node_id: &PublicKey, user_channel_id: u64) -> Result<(), APIError> {
 		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
 
 		let mut channel_state_lock = self.channel_state.lock().unwrap();
@@ -4130,6 +4132,9 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
 				if !channel.get().inbound_is_awaiting_accept() {
 					return Err(APIError::APIMisuseError { err: "The channel isn't currently awaiting to be accepted.".to_owned() });
 				}
+				if *counterparty_node_id != channel.get().get_counterparty_node_id() {
+					return Err(APIError::APIMisuseError { err: "The passed counterparty_node_id doesn't match the channel's counterparty node_id".to_owned() });
+				}
 				channel_state.pending_msg_events.push(events::MessageSendEvent::SendAcceptChannel {
 					node_id: channel.get().get_counterparty_node_id(),
 					msg: channel.get_mut().accept_inbound_channel(user_channel_id),

lightning/src/ln/functional_tests.rs

@@ -8283,7 +8283,7 @@ fn test_manually_accept_inbound_channel_request() {
 	let events = nodes[1].node.get_and_clear_pending_events();
 	match events[0] {
 		Event::OpenChannelRequest { temporary_channel_id, .. } => {
-			nodes[1].node.accept_inbound_channel(&temporary_channel_id, 23).unwrap();
+			nodes[1].node.accept_inbound_channel(&temporary_channel_id, &nodes[0].node.get_our_node_id(), 23).unwrap();
 		}
 		_ => panic!("Unexpected event"),
 	}
@@ -8433,8 +8433,8 @@ fn test_can_not_accept_inbound_channel_twice() {
 	let events = nodes[1].node.get_and_clear_pending_events();
 	match events[0] {
 		Event::OpenChannelRequest { temporary_channel_id, .. } => {
-			nodes[1].node.accept_inbound_channel(&temporary_channel_id, 0).unwrap();
-			let api_res = nodes[1].node.accept_inbound_channel(&temporary_channel_id, 0);
+			nodes[1].node.accept_inbound_channel(&temporary_channel_id, &nodes[0].node.get_our_node_id(), 0).unwrap();
+			let api_res = nodes[1].node.accept_inbound_channel(&temporary_channel_id, &nodes[0].node.get_our_node_id(), 0);
 			match api_res {
 				Err(APIError::APIMisuseError { err }) => {
 					assert_eq!(err, "The channel isn't currently awaiting to be accepted.");
@@ -8460,13 +8460,13 @@ fn test_can_not_accept_inbound_channel_twice() {
 
 #[test]
 fn test_can_not_accept_unknown_inbound_channel() {
-	let chanmon_cfg = create_chanmon_cfgs(1);
-	let node_cfg = create_node_cfgs(1, &chanmon_cfg);
-	let node_chanmgr = create_node_chanmgrs(1, &node_cfg, &[None]);
-	let node = create_network(1, &node_cfg, &node_chanmgr)[0].node;
+	let chanmon_cfg = create_chanmon_cfgs(2);
+	let node_cfg = create_node_cfgs(2, &chanmon_cfg);
+	let node_chanmgr = create_node_chanmgrs(2, &node_cfg, &[None, None]);
+	let nodes = create_network(2, &node_cfg, &node_chanmgr);
 
 	let unknown_channel_id = [0; 32];
-	let api_res = node.accept_inbound_channel(&unknown_channel_id, 0);
+	let api_res = nodes[0].node.accept_inbound_channel(&unknown_channel_id, &nodes[1].node.get_our_node_id(), 0);
 	match api_res {
 		Err(APIError::ChannelUnavailable { err }) => {
 			assert_eq!(err, "Can't accept a channel that doesn't exist");