Breakup CooperativeClosure into Local/Remote initiated

Author: benthecarman

lightning/src/events/mod.rs

@@ -184,8 +184,15 @@ pub enum ClosureReason {
 	HolderForceClosed,
 	/// The channel was closed after negotiating a cooperative close and we've now broadcasted
 	/// the cooperative close transaction. Note the shutdown may have been initiated by us.
-	//TODO: split between CounterpartyInitiated/LocallyInitiated
+	// Can be removed once we disallow downgrading to 0.0.121
 	CooperativeClosure,
+	/// The channel was closed after negotiating a cooperative close and we've now broadcasted
+	/// the cooperative close transaction. This indicates that the shutdown was initiated by our
+	/// counterparty.
+	CounterpartyInitiatedCooperativeClosure,
+	/// The channel was closed after negotiating a cooperative close and we've now broadcasted
+	/// the cooperative close transaction. This indicates that the shutdown was initiated by us.
+	LocallyInitiatedCooperativeClosure,
 	/// A commitment transaction was confirmed on chain, closing the channel. Most likely this
 	/// commitment transaction came from our counterparty, but it may also have come from
 	/// a copy of our own `ChannelMonitor`.
@@ -231,6 +238,8 @@ impl core::fmt::Display for ClosureReason {
 			},
 			ClosureReason::HolderForceClosed => f.write_str("user manually force-closed the channel"),
 			ClosureReason::CooperativeClosure => f.write_str("the channel was cooperatively closed"),
+			ClosureReason::CounterpartyInitiatedCooperativeClosure => f.write_str("the channel was cooperatively closed by our peer"),
+			ClosureReason::LocallyInitiatedCooperativeClosure => f.write_str("the channel was cooperatively closed by us"),
 			ClosureReason::CommitmentTxConfirmed => f.write_str("commitment or closing transaction was confirmed on chain."),
 			ClosureReason::FundingTimedOut => write!(f, "funding transaction failed to confirm within {} blocks", FUNDING_CONF_DEADLINE_BLOCKS),
 			ClosureReason::ProcessingError { err } => {
@@ -255,7 +264,9 @@ impl_writeable_tlv_based_enum_upgradable!(ClosureReason,
 	(10, DisconnectedPeer) => {},
 	(12, OutdatedChannelManager) => {},
 	(13, CounterpartyCoopClosedUnfundedChannel) => {},
-	(15, FundingBatchClosure) => {}
+	(15, FundingBatchClosure) => {},
+	(17, CounterpartyInitiatedCooperativeClosure) => {},
+	(19, LocallyInitiatedCooperativeClosure) => {},
 );
 
 /// Intended destination of a failed HTLC as indicated in [`Event::HTLCHandlingFailed`].

lightning/src/ln/chanmon_update_fail_tests.rs

@@ -1955,8 +1955,8 @@ fn do_during_funding_monitor_fail(confirm_a_first: bool, restore_b_before_conf:
 
 	send_payment(&nodes[0], &[&nodes[1]], 8000000);
 	close_channel(&nodes[0], &nodes[1], &channel_id, funding_tx, true);
-	check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[0], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[1], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
 }
 
 #[test]
@@ -2634,8 +2634,8 @@ fn test_temporary_error_during_shutdown() {
 	assert_eq!(txn_a, txn_b);
 	assert_eq!(txn_a.len(), 1);
 	check_spends!(txn_a[0], funding_tx);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
-	check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[0], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
 }
 
 #[test]

lightning/src/ln/channel.rs

@@ -1256,6 +1256,9 @@ pub(super) struct ChannelContext<SP: Deref> where SP::Target: SignerProvider {
 	// We track whether we already emitted a `ChannelReady` event.
 	channel_ready_event_emitted: bool,
 
+	/// Some if we initiated to shut down the channel.
+	local_initiated_shutdown: Option<()>,
+
 	/// The unique identifier used to re-derive the private key material for the channel through
 	/// [`SignerProvider::derive_channel_signer`].
 	channel_keys_id: [u8; 32],
@@ -4959,11 +4962,17 @@ impl<SP: Deref> Channel<SP> where
 			}
 		}
 
+		let closure_reason = if self.initiated_shutdown() {
+			ClosureReason::LocallyInitiatedCooperativeClosure
+		} else {
+			ClosureReason::CounterpartyInitiatedCooperativeClosure
+		};
+
 		assert!(self.context.shutdown_scriptpubkey.is_some());
 		if let Some((last_fee, sig)) = self.context.last_sent_closing_fee {
 			if last_fee == msg.fee_satoshis {
 				let shutdown_result = ShutdownResult {
-					closure_reason: ClosureReason::CooperativeClosure,
+					closure_reason,
 					monitor_update: None,
 					dropped_outbound_htlcs: Vec::new(),
 					unbroadcasted_batch_funding_txid: self.context.unbroadcasted_batch_funding_txid(),
@@ -4998,7 +5007,7 @@ impl<SP: Deref> Channel<SP> where
 							.map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
 						let (signed_tx, shutdown_result) = if $new_fee == msg.fee_satoshis {
 							let shutdown_result = ShutdownResult {
-								closure_reason: ClosureReason::CooperativeClosure,
+								closure_reason,
 								monitor_update: None,
 								dropped_outbound_htlcs: Vec::new(),
 								unbroadcasted_batch_funding_txid: self.context.unbroadcasted_batch_funding_txid(),
@@ -5263,6 +5272,11 @@ impl<SP: Deref> Channel<SP> where
 		self.context.channel_state.is_local_shutdown_sent()
 	}
 
+	/// Returns true if we either initiated to shut down the channel.
+	pub fn initiated_shutdown(&self) -> bool {
+		self.context.local_initiated_shutdown.is_some()
+	}
+
 	/// Returns true if this channel is fully shut down. True here implies that no further actions
 	/// may/will be taken on this channel, and thus this object should be freed. Any future changes
 	/// will be handled appropriately by the chain monitor.
@@ -6177,6 +6191,7 @@ impl<SP: Deref> Channel<SP> where
 		// From here on out, we may not fail!
 		self.context.target_closing_feerate_sats_per_kw = target_feerate_sats_per_kw;
 		self.context.channel_state.set_local_shutdown_sent();
+		self.context.local_initiated_shutdown = Some(());
 		self.context.update_time_counter += 1;
 
 		let monitor_update = if update_shutdown_script {
@@ -6437,6 +6452,7 @@ impl<SP: Deref> OutboundV1Channel<SP> where SP::Target: SignerProvider {
 				channel_keys_id,
 
 				blocked_monitor_updates: Vec::new(),
+				local_initiated_shutdown: None,
 			},
 			unfunded_context: UnfundedChannelContext { unfunded_channel_age_ticks: 0 }
 		})
@@ -7237,6 +7253,8 @@ impl<SP: Deref> InboundV1Channel<SP> where SP::Target: SignerProvider {
 				channel_type,
 				channel_keys_id,
 
+				local_initiated_shutdown: None,
+
 				blocked_monitor_updates: Vec::new(),
 			},
 			unfunded_context: UnfundedChannelContext { unfunded_channel_age_ticks: 0 }
@@ -7811,6 +7829,7 @@ impl<SP: Deref> Writeable for Channel<SP> where SP::Target: SignerProvider {
 			(39, pending_outbound_blinding_points, optional_vec),
 			(41, holding_cell_blinding_points, optional_vec),
 			(43, malformed_htlcs, optional_vec), // Added in 0.0.119
+			(45, self.context.local_initiated_shutdown, option), // Added in 0.0.122
 		});
 
 		Ok(())
@@ -8098,6 +8117,8 @@ impl<'a, 'b, 'c, ES: Deref, SP: Deref> ReadableArgs<(&'a ES, &'b SP, u32, &'c Ch
 
 		let mut is_batch_funding: Option<()> = None;
 
+		let mut local_initiated_shutdown: Option<()> = None;
+
 		let mut pending_outbound_blinding_points_opt: Option<Vec<Option<PublicKey>>> = None;
 		let mut holding_cell_blinding_points_opt: Option<Vec<Option<PublicKey>>> = None;
 
@@ -8132,6 +8153,7 @@ impl<'a, 'b, 'c, ES: Deref, SP: Deref> ReadableArgs<(&'a ES, &'b SP, u32, &'c Ch
 			(39, pending_outbound_blinding_points_opt, optional_vec),
 			(41, holding_cell_blinding_points_opt, optional_vec),
 			(43, malformed_htlcs, optional_vec), // Added in 0.0.119
+			(45, local_initiated_shutdown, option),
 		});
 
 		let (channel_keys_id, holder_signer) = if let Some(channel_keys_id) = channel_keys_id {
@@ -8362,6 +8384,8 @@ impl<'a, 'b, 'c, ES: Deref, SP: Deref> ReadableArgs<(&'a ES, &'b SP, u32, &'c Ch
 				channel_type: channel_type.unwrap(),
 				channel_keys_id,
 
+				local_initiated_shutdown,
+
 				blocked_monitor_updates: blocked_monitor_updates.unwrap(),
 			}
 		})

lightning/src/ln/channelmanager.rs

@@ -11856,8 +11856,8 @@ mod tests {
 		}
 		let (_nodes_1_update, _none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
 
-		check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 1000000);
-		check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 1000000);
+		check_closed_event!(nodes[0], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 1000000);
+		check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 1000000);
 	}
 
 	fn check_not_connected_to_peer_error<T>(res_err: Result<T, APIError>, expected_public_key: PublicKey) {

lightning/src/ln/functional_tests.rs

@@ -871,8 +871,8 @@ fn test_update_fee_with_fundee_update_add_htlc() {
 	send_payment(&nodes[1], &vec!(&nodes[0])[..], 800000);
 	send_payment(&nodes[0], &vec!(&nodes[1])[..], 800000);
 	close_channel(&nodes[0], &nodes[1], &chan.2, chan.3, true);
-	check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[0], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[1], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
 }
 
 #[test]
@@ -985,8 +985,8 @@ fn test_update_fee() {
 	assert_eq!(get_feerate!(nodes[0], nodes[1], channel_id), feerate + 30);
 	assert_eq!(get_feerate!(nodes[1], nodes[0], channel_id), feerate + 30);
 	close_channel(&nodes[0], &nodes[1], &chan.2, chan.3, true);
-	check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[0], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[1], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
 }
 
 #[test]
@@ -1104,17 +1104,17 @@ fn fake_network_test() {
 
 	// Close down the channels...
 	close_channel(&nodes[0], &nodes[1], &chan_1.2, chan_1.3, true);
-	check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[0], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[1], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
 	close_channel(&nodes[1], &nodes[2], &chan_2.2, chan_2.3, false);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[2].node.get_our_node_id()], 100000);
-	check_closed_event!(nodes[2], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[1], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[2].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[2], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
 	close_channel(&nodes[2], &nodes[3], &chan_3.2, chan_3.3, true);
-	check_closed_event!(nodes[2], 1, ClosureReason::CooperativeClosure, [nodes[3].node.get_our_node_id()], 100000);
-	check_closed_event!(nodes[3], 1, ClosureReason::CooperativeClosure, [nodes[2].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[2], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[3].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[3], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[2].node.get_our_node_id()], 100000);
 	close_channel(&nodes[1], &nodes[3], &chan_4.2, chan_4.3, false);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[3].node.get_our_node_id()], 100000);
-	check_closed_event!(nodes[3], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[1], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[3].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[3], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
 }
 
 #[test]
@@ -5619,15 +5619,15 @@ fn test_static_output_closing_tx() {
 	let closing_tx = close_channel(&nodes[0], &nodes[1], &chan.2, chan.3, true).2;
 
 	mine_transaction(&nodes[0], &closing_tx);
-	check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[0], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
 	connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 
 	let spend_txn = check_spendable_outputs!(nodes[0], node_cfgs[0].keys_manager);
 	assert_eq!(spend_txn.len(), 1);
 	check_spends!(spend_txn[0], closing_tx);
 
 	mine_transaction(&nodes[1], &closing_tx);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
+	check_closed_event!(nodes[1], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
 	connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 
 	let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);

lightning/src/ln/monitor_tests.rs

@@ -257,8 +257,8 @@ fn do_chanmon_claim_value_coop_close(anchors: bool) {
 		spendable_outputs_b
 	);
 
-	check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 1000000);
-	check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 1000000);
+	check_closed_event!(nodes[0], 1, ClosureReason::LocallyInitiatedCooperativeClosure, [nodes[1].node.get_our_node_id()], 1000000);
+	check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyInitiatedCooperativeClosure, [nodes[0].node.get_our_node_id()], 1000000);
 }
 
 #[test]