Peer storage feature

lightning-background-processor/src/lib.rs

@@ -1098,7 +1098,7 @@ mod tests {
 	use lightning::routing::gossip::{NetworkGraph, P2PGossipSync};
 	use lightning::routing::router::{CandidateRouteHop, DefaultRouter, Path, RouteHop};
 	use lightning::routing::scoring::{ChannelUsage, LockableScore, ScoreLookUp, ScoreUpdate};
-	use lightning::sign::{ChangeDestinationSource, InMemorySigner, KeysManager};
+	use lightning::sign::{ChangeDestinationSource, InMemorySigner, KeysManager, NodeSigner};
 	use lightning::util::config::UserConfig;
 	use lightning::util::persist::{
 		KVStore, CHANNEL_MANAGER_PERSISTENCE_KEY, CHANNEL_MANAGER_PERSISTENCE_PRIMARY_NAMESPACE,
@@ -1219,6 +1219,7 @@ mod tests {
 				Arc<test_utils::TestLogger>,
 				IgnoringMessageHandler,
 				Arc<KeysManager>,
+				IgnoringMessageHandler,
 			>,
 		>,
 		chain_monitor: Arc<ChainMonitor>,
@@ -1579,6 +1580,7 @@ mod tests {
 				logger.clone(),
 				fee_estimator.clone(),
 				kv_store.clone(),
+				keys_manager.get_peer_storage_key(),
 			));
 			let best_block = BestBlock::from_network(network);
 			let params = ChainParameters { network, best_block };
@@ -1632,6 +1634,7 @@ mod tests {
 				route_handler: Arc::new(test_utils::TestRoutingMessageHandler::new()),
 				onion_message_handler: messenger.clone(),
 				custom_message_handler: IgnoringMessageHandler {},
+				send_only_message_handler: IgnoringMessageHandler {},
 			};
 			let peer_manager = Arc::new(PeerManager::new(
 				msg_handler,

lightning-net-tokio/src/lib.rs

@@ -760,6 +760,8 @@ mod tests {
 		fn handle_tx_init_rbf(&self, _their_node_id: PublicKey, _msg: &TxInitRbf) {}
 		fn handle_tx_ack_rbf(&self, _their_node_id: PublicKey, _msg: &TxAckRbf) {}
 		fn handle_tx_abort(&self, _their_node_id: PublicKey, _msg: &TxAbort) {}
+		fn handle_peer_storage(&self, _their_node_id: PublicKey, _msg: &PeerStorageMessage) {}
+		fn handle_your_peer_storage(&self, _their_node_id: PublicKey, _msg: &YourPeerStorageMessage) {}
 		fn peer_disconnected(&self, their_node_id: PublicKey) {
 			if their_node_id == self.expected_pubkey {
 				self.disconnected_flag.store(true, Ordering::SeqCst);
@@ -835,6 +837,7 @@ mod tests {
 			route_handler: Arc::clone(&a_handler),
 			onion_message_handler: Arc::new(IgnoringMessageHandler {}),
 			custom_message_handler: Arc::new(IgnoringMessageHandler {}),
+			send_only_message_handler: Arc::new(IgnoringMessageHandler {}),
 		};
 		let a_manager = Arc::new(PeerManager::new(
 			a_msg_handler,
@@ -858,6 +861,7 @@ mod tests {
 			route_handler: Arc::clone(&b_handler),
 			onion_message_handler: Arc::new(IgnoringMessageHandler {}),
 			custom_message_handler: Arc::new(IgnoringMessageHandler {}),
+			send_only_message_handler: Arc::new(IgnoringMessageHandler {}),
 		};
 		let b_manager = Arc::new(PeerManager::new(
 			b_msg_handler,
@@ -920,6 +924,7 @@ mod tests {
 			onion_message_handler: Arc::new(IgnoringMessageHandler {}),
 			route_handler: Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler {}),
 			custom_message_handler: Arc::new(IgnoringMessageHandler {}),
+			send_only_message_handler: Arc::new(IgnoringMessageHandler {}),
 		};
 		let a_manager = Arc::new(PeerManager::new(
 			a_msg_handler,

lightning-types/src/features.rs

@@ -70,6 +70,8 @@
 //!     (see the [`Trampoline` feature proposal](https://github.com/lightning/bolts/pull/836) for more information).
 //! - `DnsResolver` - supports resolving DNS names to TXT DNSSEC proofs for BIP 353 payments
 //!     (see [bLIP 32](https://github.com/lightning/blips/blob/master/blip-0032.md) for more information).
+//! - `ProvidePeerBackupStorage` - Indicates that we offer the capability to store data of our peers
+//! 	(see https://github.com/lightning/bolts/pull/1110 for more info).
 //!
 //! LDK knows about the following features, but does not support them:
 //! - `AnchorsNonzeroFeeHtlcTx` - the initial version of anchor outputs, which was later found to be
@@ -150,7 +152,7 @@ mod sealed {
 			// Byte 4
 			OnionMessages,
 			// Byte 5
-			ChannelType | SCIDPrivacy,
+			ProvidePeerBackupStorage | ChannelType | SCIDPrivacy,
 			// Byte 6
 			ZeroConf,
 			// Byte 7
@@ -171,7 +173,7 @@ mod sealed {
 			// Byte 4
 			OnionMessages,
 			// Byte 5
-			ChannelType | SCIDPrivacy,
+			ProvidePeerBackupStorage | ChannelType | SCIDPrivacy,
 			// Byte 6
 			ZeroConf | Keysend,
 			// Byte 7
@@ -522,6 +524,16 @@ mod sealed {
 		supports_onion_messages,
 		requires_onion_messages
 	);
+	define_feature!(
+		43,
+		ProvidePeerBackupStorage,
+		[InitContext, NodeContext],
+		"Feature flags for `provide_peer_backup_storage`.",
+		set_provide_peer_backup_storage_optional,
+		set_provide_peer_backup_storage_required,
+		supports_provide_peer_storage,
+		requires_provide_peer_storage
+	);
 	define_feature!(
 		45,
 		ChannelType,
@@ -1104,6 +1116,14 @@ mod tests {
 		assert!(!features1.requires_unknown_bits_from(&features2));
 		assert!(!features2.requires_unknown_bits_from(&features1));
 
+		features1.set_provide_peer_backup_storage_required();
+		assert!(features1.requires_unknown_bits_from(&features2));
+		assert!(!features2.requires_unknown_bits_from(&features1));
+
+		features2.set_provide_peer_backup_storage_optional();
+		assert!(!features1.requires_unknown_bits_from(&features2));
+		assert!(!features2.requires_unknown_bits_from(&features1));
+
 		features1.set_data_loss_protect_required();
 		assert!(features1.requires_unknown_bits_from(&features2));
 		assert!(!features2.requires_unknown_bits_from(&features1));