f use trait

Author: TheBlueMatt

lightning/src/ln/channelmanager.rs

@@ -1031,23 +1031,12 @@ struct PersistenceNotifierGuard<'a, F: Fn() -> NotifyOption> {
 }
 
 impl<'a> PersistenceNotifierGuard<'a, fn() -> NotifyOption> { // We don't care what the concrete F is here, it's unused
-	fn notify_on_drop<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>
-		(cm: &'a ChannelManager<M, T, ES, NS, SP, F, R, L>) -> PersistenceNotifierGuard<'a, impl Fn() -> NotifyOption>
-	where
-		M::Target: chain::Watch<<SP::Target as SignerProvider>::Signer>,
-		T::Target: BroadcasterInterface,
-		ES::Target: EntropySource,
-		NS::Target: NodeSigner,
-		SP::Target: SignerProvider,
-		F::Target: FeeEstimator,
-		R::Target: Router,
-		L::Target: Logger,
-	{
-		let read_guard = cm.total_consistency_lock.read().unwrap();
-		cm.process_background_events();
+	fn notify_on_drop<C: AChannelManager>(cm: &'a C) -> PersistenceNotifierGuard<'a, impl Fn() -> NotifyOption> {
+		let read_guard = cm.get_cm().total_consistency_lock.read().unwrap();
+		cm.get_cm().process_background_events();
 
 		PersistenceNotifierGuard {
-			persistence_notifier: &cm.persistence_notifier,
+			persistence_notifier: &cm.get_cm().persistence_notifier,
 			should_persist: || -> NotifyOption { NotifyOption::DoPersist },
 			_read_guard: read_guard,
 		}
@@ -1951,7 +1940,7 @@ where
 			return Err(APIError::APIMisuseError { err: format!("Channel value must be at least 1000 satoshis. It was {}", channel_value_satoshis) });
 		}
 
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		// We want to make sure the lock is actually acquired by PersistenceNotifierGuard.
 		debug_assert!(&self.total_consistency_lock.try_write().is_err());
 
@@ -2105,7 +2094,7 @@ where
 	}
 
 	fn close_channel_internal(&self, channel_id: &[u8; 32], counterparty_node_id: &PublicKey, target_feerate_sats_per_1000_weight: Option<u32>, override_shutdown_script: Option<ShutdownScript>) -> Result<(), APIError> {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		let mut failed_htlcs: Vec<(HTLCSource, PaymentHash)>;
 		let result: Result<(), _> = loop {
@@ -2278,7 +2267,7 @@ where
 	}
 
 	fn force_close_sending_error(&self, channel_id: &[u8; 32], counterparty_node_id: &PublicKey, broadcast: bool) -> Result<(), APIError> {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		match self.force_close_channel_with_peer(channel_id, counterparty_node_id, None, broadcast) {
 			Ok(counterparty_node_id) => {
 				let per_peer_state = self.per_peer_state.read().unwrap();
@@ -2888,7 +2877,7 @@ where
 	/// [`ChannelMonitorUpdateStatus::InProgress`]: crate::chain::ChannelMonitorUpdateStatus::InProgress
 	pub fn send_payment_with_route(&self, route: &Route, payment_hash: PaymentHash, recipient_onion: RecipientOnionFields, payment_id: PaymentId) -> Result<(), PaymentSendFailure> {
 		let best_block_height = self.best_block.read().unwrap().height();
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		self.pending_outbound_payments
 			.send_payment_with_route(route, payment_hash, recipient_onion, payment_id, &self.entropy_source, &self.node_signer, best_block_height,
 				|path, payment_hash, recipient_onion, total_value, cur_height, payment_id, keysend_preimage, session_priv|
@@ -2899,7 +2888,7 @@ where
 	/// `route_params` and retry failed payment paths based on `retry_strategy`.
 	pub fn send_payment(&self, payment_hash: PaymentHash, recipient_onion: RecipientOnionFields, payment_id: PaymentId, route_params: RouteParameters, retry_strategy: Retry) -> Result<(), RetryableSendFailure> {
 		let best_block_height = self.best_block.read().unwrap().height();
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		self.pending_outbound_payments
 			.send_payment(payment_hash, recipient_onion, payment_id, retry_strategy, route_params,
 				&self.router, self.list_usable_channels(), || self.compute_inflight_htlcs(),
@@ -2912,7 +2901,7 @@ where
 	#[cfg(test)]
 	pub(super) fn test_send_payment_internal(&self, route: &Route, payment_hash: PaymentHash, recipient_onion: RecipientOnionFields, keysend_preimage: Option<PaymentPreimage>, payment_id: PaymentId, recv_value_msat: Option<u64>, onion_session_privs: Vec<[u8; 32]>) -> Result<(), PaymentSendFailure> {
 		let best_block_height = self.best_block.read().unwrap().height();
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		self.pending_outbound_payments.test_send_payment_internal(route, payment_hash, recipient_onion, keysend_preimage, payment_id, recv_value_msat, onion_session_privs, &self.node_signer, best_block_height,
 			|path, payment_hash, recipient_onion, total_value, cur_height, payment_id, keysend_preimage, session_priv|
 			self.send_payment_along_path(path, payment_hash, recipient_onion, total_value, cur_height, payment_id, keysend_preimage, session_priv))
@@ -2947,7 +2936,7 @@ where
 	/// [`Event::PaymentFailed`]: events::Event::PaymentFailed
 	/// [`Event::PaymentSent`]: events::Event::PaymentSent
 	pub fn abandon_payment(&self, payment_id: PaymentId) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		self.pending_outbound_payments.abandon_payment(payment_id, PaymentFailureReason::UserAbandoned, &self.pending_events);
 	}
 
@@ -2968,7 +2957,7 @@ where
 	/// [`send_payment`]: Self::send_payment
 	pub fn send_spontaneous_payment(&self, route: &Route, payment_preimage: Option<PaymentPreimage>, recipient_onion: RecipientOnionFields, payment_id: PaymentId) -> Result<PaymentHash, PaymentSendFailure> {
 		let best_block_height = self.best_block.read().unwrap().height();
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		self.pending_outbound_payments.send_spontaneous_payment_with_route(
 			route, payment_preimage, recipient_onion, payment_id, &self.entropy_source,
 			&self.node_signer, best_block_height,
@@ -2985,7 +2974,7 @@ where
 	/// [`PaymentParameters::for_keysend`]: crate::routing::router::PaymentParameters::for_keysend
 	pub fn send_spontaneous_payment_with_retry(&self, payment_preimage: Option<PaymentPreimage>, recipient_onion: RecipientOnionFields, payment_id: PaymentId, route_params: RouteParameters, retry_strategy: Retry) -> Result<PaymentHash, RetryableSendFailure> {
 		let best_block_height = self.best_block.read().unwrap().height();
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		self.pending_outbound_payments.send_spontaneous_payment(payment_preimage, recipient_onion,
 			payment_id, retry_strategy, route_params, &self.router, self.list_usable_channels(),
 			|| self.compute_inflight_htlcs(),  &self.entropy_source, &self.node_signer, best_block_height,
@@ -2999,7 +2988,7 @@ where
 	/// us to easily discern them from real payments.
 	pub fn send_probe(&self, path: Path) -> Result<(PaymentHash, PaymentId), PaymentSendFailure> {
 		let best_block_height = self.best_block.read().unwrap().height();
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		self.pending_outbound_payments.send_probe(path, self.probing_cookie_secret, &self.entropy_source, &self.node_signer, best_block_height,
 			|path, payment_hash, recipient_onion, total_value, cur_height, payment_id, keysend_preimage, session_priv|
 			self.send_payment_along_path(path, payment_hash, recipient_onion, total_value, cur_height, payment_id, keysend_preimage, session_priv))
@@ -3110,7 +3099,7 @@ where
 	/// [`Event::FundingGenerationReady`]: crate::events::Event::FundingGenerationReady
 	/// [`Event::ChannelClosed`]: crate::events::Event::ChannelClosed
 	pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], counterparty_node_id: &PublicKey, funding_transaction: Transaction) -> Result<(), APIError> {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		for inp in funding_transaction.input.iter() {
 			if inp.witness.is_empty() {
@@ -3190,7 +3179,7 @@ where
 			});
 		}
 
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let per_peer_state = self.per_peer_state.read().unwrap();
 		let peer_state_mutex = per_peer_state.get(counterparty_node_id)
 			.ok_or_else(|| APIError::ChannelUnavailable { err: format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id) })?;
@@ -3243,7 +3232,7 @@ where
 	// TODO: when we move to deciding the best outbound channel at forward time, only take
 	// `next_node_id` and not `next_hop_channel_id`
 	pub fn forward_intercepted_htlc(&self, intercept_id: InterceptId, next_hop_channel_id: &[u8; 32], next_node_id: PublicKey, amt_to_forward_msat: u64) -> Result<(), APIError> {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		let next_hop_scid = {
 			let peer_state_lock = self.per_peer_state.read().unwrap();
@@ -3299,7 +3288,7 @@ where
 	///
 	/// [`HTLCIntercepted`]: events::Event::HTLCIntercepted
 	pub fn fail_intercepted_htlc(&self, intercept_id: InterceptId) -> Result<(), APIError> {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		let payment = self.pending_intercepted_htlcs.lock().unwrap().remove(&intercept_id)
 			.ok_or_else(|| APIError::APIMisuseError {
@@ -3328,7 +3317,7 @@ where
 	/// Should only really ever be called in response to a PendingHTLCsForwardable event.
 	/// Will likely generate further events.
 	pub fn process_pending_htlc_forwards(&self) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		let mut new_events = VecDeque::new();
 		let mut failed_forwards = Vec::new();
@@ -4096,7 +4085,7 @@ where
 	///
 	/// See [`FailureCode`] for valid failure codes.
 	pub fn fail_htlc_backwards_with_reason(&self, payment_hash: &PaymentHash, failure_code: FailureCode) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		let removed_source = self.claimable_payments.lock().unwrap().claimable_payments.remove(payment_hash);
 		if let Some(payment) = removed_source {
@@ -4273,7 +4262,7 @@ where
 	pub fn claim_funds(&self, payment_preimage: PaymentPreimage) {
 		let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
 
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		let mut sources = {
 			let mut claimable_payments = self.claimable_payments.lock().unwrap();
@@ -4674,7 +4663,7 @@ where
 	}
 
 	fn do_accept_inbound_channel(&self, temporary_channel_id: &[u8; 32], counterparty_node_id: &PublicKey, accept_0conf: bool, user_channel_id: u128) -> Result<(), APIError> {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		let peers_without_funded_channels = self.peers_without_funded_channels(|peer| !peer.channel_by_id.is_empty());
 		let per_peer_state = self.per_peer_state.read().unwrap();
@@ -5621,7 +5610,7 @@ where
 	/// update events as a separate process method here.
 	#[cfg(fuzzing)]
 	pub fn process_monitor_events(&self) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		self.process_pending_monitor_events();
 	}
 
@@ -5776,7 +5765,7 @@ where
 
 		let payment_secret = PaymentSecret(self.entropy_source.get_secure_random_bytes());
 
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let mut payment_secrets = self.pending_inbound_payments.lock().unwrap();
 		match payment_secrets.entry(payment_hash) {
 			hash_map::Entry::Vacant(e) => {
@@ -6559,7 +6548,7 @@ where
 	L::Target: Logger,
 {
 	fn handle_open_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::OpenChannel) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_open_channel(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
@@ -6570,7 +6559,7 @@ where
 	}
 
 	fn handle_accept_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::AcceptChannel) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_accept_channel(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
@@ -6581,67 +6570,67 @@ where
 	}
 
 	fn handle_funding_created(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingCreated) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_funding_created(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_funding_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingSigned) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_funding_signed(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_channel_ready(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelReady) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_channel_ready(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_shutdown(&self, counterparty_node_id: &PublicKey, msg: &msgs::Shutdown) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_shutdown(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_closing_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::ClosingSigned) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_closing_signed(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_update_add_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_update_add_htlc(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_update_fulfill_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_update_fulfill_htlc(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_update_fail_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_update_fail_htlc(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_update_fail_malformed_htlc(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_update_fail_malformed_htlc(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_commitment_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::CommitmentSigned) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_commitment_signed(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_revoke_and_ack(&self, counterparty_node_id: &PublicKey, msg: &msgs::RevokeAndACK) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_revoke_and_ack(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_update_fee(&self, counterparty_node_id: &PublicKey, msg: &msgs::UpdateFee) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_update_fee(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn handle_announcement_signatures(&self, counterparty_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_announcement_signatures(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
@@ -6657,12 +6646,12 @@ where
 	}
 
 	fn handle_channel_reestablish(&self, counterparty_node_id: &PublicKey, msg: &msgs::ChannelReestablish) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let _ = handle_error!(self, self.internal_channel_reestablish(counterparty_node_id, msg), *counterparty_node_id);
 	}
 
 	fn peer_disconnected(&self, counterparty_node_id: &PublicKey) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 		let mut failed_channels = Vec::new();
 		let mut per_peer_state = self.per_peer_state.write().unwrap();
 		let remove_peer = {
@@ -6744,7 +6733,7 @@ where
 			return Err(());
 		}
 
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		// If we have too many peers connected which don't have funded channels, disconnect the
 		// peer immediately (as long as it doesn't have funded channels). If we have a bunch of
@@ -6827,7 +6816,7 @@ where
 	}
 
 	fn handle_error(&self, counterparty_node_id: &PublicKey, msg: &msgs::ErrorMessage) {
-		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self);
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
 
 		if msg.channel_id == [0; 32] {
 			let channel_ids: Vec<[u8; 32]> = {