X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fchain%2Fchannelmonitor.rs;h=5cd031143be5db9e5bbd915173d662f29f31c128;hb=9115f66dbc3824b2d655eb5440d122bdd1282eff;hp=6492ba176e8f43877615d99fd6f202a02a772e51;hpb=5c06d1d9c8549c04188bee2b60f8224bce26e8bc;p=rust-lightning

diff --git a/lightning/src/chain/channelmonitor.rs b/lightning/src/chain/channelmonitor.rs
index 6492ba17..5cd03114 100644
--- a/lightning/src/chain/channelmonitor.rs
+++ b/lightning/src/chain/channelmonitor.rs
@@ -40,7 +40,7 @@ use ln::chan_utils::{CounterpartyCommitmentSecrets, HTLCOutputInCommitment, HTLC
 use ln::channelmanager::HTLCSource;
 use chain;
 use chain::{BestBlock, WatchedOutput};
-use chain::chaininterface::{BroadcasterInterface, FeeEstimator};
+use chain::chaininterface::{BroadcasterInterface, FeeEstimator, LowerBoundedFeeEstimator};
 use chain::transaction::{OutPoint, TransactionData};
 use chain::keysinterface::{SpendableOutputDescriptor, StaticPaymentOutputDescriptor, DelayedPaymentOutputDescriptor, Sign, KeysInterface};
 use chain::onchaintx::OnchainTxHandler;
@@ -315,6 +315,7 @@ struct OnchainEventEntry {
 	txid: Txid,
 	height: u32,
 	event: OnchainEvent,
+	transaction: Option<Transaction>, // Added as optional, but always filled in, in LDK 0.0.110
 }
 
 impl OnchainEventEntry {
@@ -395,6 +396,7 @@ impl Writeable for OnchainEventEntry {
 	fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
 		write_tlv_fields!(writer, {
 			(0, self.txid, required),
+			(1, self.transaction, option),
 			(2, self.height, required),
 			(4, self.event, required),
 		});
@@ -404,16 +406,18 @@ impl Writeable for OnchainEventEntry {
 
 impl MaybeReadable for OnchainEventEntry {
 	fn read<R: io::Read>(reader: &mut R) -> Result<Option<Self>, DecodeError> {
-		let mut txid = Default::default();
+		let mut txid = Txid::all_zeros();
+		let mut transaction = None;
 		let mut height = 0;
 		let mut event = None;
 		read_tlv_fields!(reader, {
 			(0, txid, required),
+			(1, transaction, option),
 			(2, height, required),
 			(4, event, ignorable),
 		});
 		if let Some(ev) = event {
-			Ok(Some(Self { txid, height, event: ev }))
+			Ok(Some(Self { txid, transaction, height, event: ev }))
 		} else {
 			Ok(None)
 		}
@@ -965,6 +969,13 @@ impl<Signer: Sign> Writeable for ChannelMonitorImpl<Signer> {
 }
 
 impl<Signer: Sign> ChannelMonitor<Signer> {
+	/// For lockorder enforcement purposes, we need to have a single site which constructs the
+	/// `inner` mutex, otherwise cases where we lock two monitors at the same time (eg in our
+	/// PartialEq implementation) we may decide a lockorder violation has occurred.
+	fn from_impl(imp: ChannelMonitorImpl<Signer>) -> Self {
+		ChannelMonitor { inner: Mutex::new(imp) }
+	}
+
 	pub(crate) fn new(secp_ctx: Secp256k1<secp256k1::All>, keys: Signer, shutdown_script: Option<Script>,
 	                  on_counterparty_tx_csv: u16, destination_script: &Script, funding_info: (OutPoint, Script),
 	                  channel_parameters: &ChannelTransactionParameters,
@@ -1012,60 +1023,58 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		let mut outputs_to_watch = HashMap::new();
 		outputs_to_watch.insert(funding_info.0.txid, vec![(funding_info.0.index as u32, funding_info.1.clone())]);
 
-		ChannelMonitor {
-			inner: Mutex::new(ChannelMonitorImpl {
-				latest_update_id: 0,
-				commitment_transaction_number_obscure_factor,
+		Self::from_impl(ChannelMonitorImpl {
+			latest_update_id: 0,
+			commitment_transaction_number_obscure_factor,
 
-				destination_script: destination_script.clone(),
-				broadcasted_holder_revokable_script: None,
-				counterparty_payment_script,
-				shutdown_script,
+			destination_script: destination_script.clone(),
+			broadcasted_holder_revokable_script: None,
+			counterparty_payment_script,
+			shutdown_script,
 
-				channel_keys_id,
-				holder_revocation_basepoint,
-				funding_info,
-				current_counterparty_commitment_txid: None,
-				prev_counterparty_commitment_txid: None,
+			channel_keys_id,
+			holder_revocation_basepoint,
+			funding_info,
+			current_counterparty_commitment_txid: None,
+			prev_counterparty_commitment_txid: None,
 
-				counterparty_commitment_params,
-				funding_redeemscript,
-				channel_value_satoshis,
-				their_cur_per_commitment_points: None,
+			counterparty_commitment_params,
+			funding_redeemscript,
+			channel_value_satoshis,
+			their_cur_per_commitment_points: None,
 
-				on_holder_tx_csv: counterparty_channel_parameters.selected_contest_delay,
+			on_holder_tx_csv: counterparty_channel_parameters.selected_contest_delay,
 
-				commitment_secrets: CounterpartyCommitmentSecrets::new(),
-				counterparty_claimable_outpoints: HashMap::new(),
-				counterparty_commitment_txn_on_chain: HashMap::new(),
-				counterparty_hash_commitment_number: HashMap::new(),
+			commitment_secrets: CounterpartyCommitmentSecrets::new(),
+			counterparty_claimable_outpoints: HashMap::new(),
+			counterparty_commitment_txn_on_chain: HashMap::new(),
+			counterparty_hash_commitment_number: HashMap::new(),
 
-				prev_holder_signed_commitment_tx: None,
-				current_holder_commitment_tx: holder_commitment_tx,
-				current_counterparty_commitment_number: 1 << 48,
-				current_holder_commitment_number,
+			prev_holder_signed_commitment_tx: None,
+			current_holder_commitment_tx: holder_commitment_tx,
+			current_counterparty_commitment_number: 1 << 48,
+			current_holder_commitment_number,
 
-				payment_preimages: HashMap::new(),
-				pending_monitor_events: Vec::new(),
-				pending_events: Vec::new(),
+			payment_preimages: HashMap::new(),
+			pending_monitor_events: Vec::new(),
+			pending_events: Vec::new(),
 
-				onchain_events_awaiting_threshold_conf: Vec::new(),
-				outputs_to_watch,
+			onchain_events_awaiting_threshold_conf: Vec::new(),
+			outputs_to_watch,
 
-				onchain_tx_handler,
+			onchain_tx_handler,
 
-				lockdown_from_offchain: false,
-				holder_tx_signed: false,
-				funding_spend_seen: false,
-				funding_spend_confirmed: None,
-				htlcs_resolved_on_chain: Vec::new(),
+			lockdown_from_offchain: false,
+			holder_tx_signed: false,
+			funding_spend_seen: false,
+			funding_spend_confirmed: None,
+			htlcs_resolved_on_chain: Vec::new(),
 
-				best_block,
-				counterparty_node_id: Some(counterparty_node_id),
+			best_block,
+			counterparty_node_id: Some(counterparty_node_id),
 
-				secp_ctx,
-			}),
-		}
+			secp_ctx,
+		})
 	}
 
 	#[cfg(test)]
@@ -1104,7 +1113,7 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		payment_hash: &PaymentHash,
 		payment_preimage: &PaymentPreimage,
 		broadcaster: &B,
-		fee_estimator: &F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: &L,
 	) where
 		B::Target: BroadcasterInterface,
@@ -1134,7 +1143,7 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		&self,
 		updates: &ChannelMonitorUpdate,
 		broadcaster: &B,
-		fee_estimator: &F,
+		fee_estimator: F,
 		logger: &L,
 	) -> Result<(), ()>
 	where
@@ -1209,6 +1218,14 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		self.inner.lock().unwrap().get_cur_holder_commitment_number()
 	}
 
+	/// Gets the `node_id` of the counterparty for this channel.
+	///
+	/// Will be `None` for channels constructed on LDK versions prior to 0.0.110 and always `Some`
+	/// otherwise.
+	pub fn get_counterparty_node_id(&self) -> Option<PublicKey> {
+		self.inner.lock().unwrap().counterparty_node_id
+	}
+
 	/// Used by ChannelManager deserialization to broadcast the latest holder state if its copy of
 	/// the Channel was out-of-date. You may use it to get a broadcastable holder toxic tx in case of
 	/// fallen-behind, i.e when receiving a channel_reestablish with a proof that our counterparty side knows
@@ -1300,8 +1317,9 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		F::Target: FeeEstimator,
 		L::Target: Logger,
 	{
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
 		self.inner.lock().unwrap().transactions_confirmed(
-			header, txdata, height, broadcaster, fee_estimator, logger)
+			header, txdata, height, broadcaster, &bounded_fee_estimator, logger)
 	}
 
 	/// Processes a transaction that was reorganized out of the chain.
@@ -1321,8 +1339,9 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		F::Target: FeeEstimator,
 		L::Target: Logger,
 	{
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
 		self.inner.lock().unwrap().transaction_unconfirmed(
-			txid, broadcaster, fee_estimator, logger);
+			txid, broadcaster, &bounded_fee_estimator, logger);
 	}
 
 	/// Updates the monitor with the current best chain tip, returning new outputs to watch. See
@@ -1345,8 +1364,9 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 		F::Target: FeeEstimator,
 		L::Target: Logger,
 	{
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
 		self.inner.lock().unwrap().best_block_updated(
-			header, height, broadcaster, fee_estimator, logger)
+			header, height, broadcaster, &bounded_fee_estimator, logger)
 	}
 
 	/// Returns the set of txids that should be monitored for re-organization out of the chain.
@@ -1667,8 +1687,10 @@ impl<Signer: Sign> ChannelMonitor<Signer> {
 /// as long as we examine both the current counterparty commitment transaction and, if it hasn't
 /// been revoked yet, the previous one, we we will never "forget" to resolve an HTLC.
 macro_rules! fail_unbroadcast_htlcs {
-	($self: expr, $commitment_tx_type: expr, $commitment_txid_confirmed: expr,
+	($self: expr, $commitment_tx_type: expr, $commitment_txid_confirmed: expr, $commitment_tx_confirmed: expr,
 	 $commitment_tx_conf_height: expr, $confirmed_htlcs_list: expr, $logger: expr) => { {
+		debug_assert_eq!($commitment_tx_confirmed.txid(), $commitment_txid_confirmed);
+
 		macro_rules! check_htlc_fails {
 			($txid: expr, $commitment_tx: expr) => {
 				if let Some(ref latest_outpoints) = $self.counterparty_claimable_outpoints.get($txid) {
@@ -1708,6 +1730,7 @@ macro_rules! fail_unbroadcast_htlcs {
 							});
 							let entry = OnchainEventEntry {
 								txid: $commitment_txid_confirmed,
+								transaction: Some($commitment_tx_confirmed.clone()),
 								height: $commitment_tx_conf_height,
 								event: OnchainEvent::HTLCUpdate {
 									source: (**source).clone(),
@@ -1740,12 +1763,12 @@ macro_rules! fail_unbroadcast_htlcs {
 
 #[cfg(test)]
 pub fn deliberately_bogus_accepted_htlc_witness_program() -> Vec<u8> {
-	let mut ret = [opcodes::all::OP_NOP.into_u8(); 136];
-	ret[131] = opcodes::all::OP_DROP.into_u8();
-	ret[132] = opcodes::all::OP_DROP.into_u8();
-	ret[133] = opcodes::all::OP_DROP.into_u8();
-	ret[134] = opcodes::all::OP_DROP.into_u8();
-	ret[135] = opcodes::OP_TRUE.into_u8();
+	let mut ret = [opcodes::all::OP_NOP.to_u8(); 136];
+	ret[131] = opcodes::all::OP_DROP.to_u8();
+	ret[132] = opcodes::all::OP_DROP.to_u8();
+	ret[133] = opcodes::all::OP_DROP.to_u8();
+	ret[134] = opcodes::all::OP_DROP.to_u8();
+	ret[135] = opcodes::OP_TRUE.to_u8();
 	Vec::from(&ret[..])
 }
 
@@ -1882,7 +1905,9 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 
 	/// Provides a payment_hash->payment_preimage mapping. Will be automatically pruned when all
 	/// commitment_tx_infos which contain the payment hash have been revoked.
-	fn provide_payment_preimage<B: Deref, F: Deref, L: Deref>(&mut self, payment_hash: &PaymentHash, payment_preimage: &PaymentPreimage, broadcaster: &B, fee_estimator: &F, logger: &L)
+	fn provide_payment_preimage<B: Deref, F: Deref, L: Deref>(
+		&mut self, payment_hash: &PaymentHash, payment_preimage: &PaymentPreimage, broadcaster: &B,
+		fee_estimator: &LowerBoundedFeeEstimator<F>, logger: &L)
 	where B::Target: BroadcasterInterface,
 		    F::Target: FeeEstimator,
 		    L::Target: Logger,
@@ -1939,10 +1964,10 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		self.pending_monitor_events.push(MonitorEvent::CommitmentTxConfirmed(self.funding_info.0));
 	}
 
-	pub fn update_monitor<B: Deref, F: Deref, L: Deref>(&mut self, updates: &ChannelMonitorUpdate, broadcaster: &B, fee_estimator: &F, logger: &L) -> Result<(), ()>
+	pub fn update_monitor<B: Deref, F: Deref, L: Deref>(&mut self, updates: &ChannelMonitorUpdate, broadcaster: &B, fee_estimator: F, logger: &L) -> Result<(), ()>
 	where B::Target: BroadcasterInterface,
-		    F::Target: FeeEstimator,
-		    L::Target: Logger,
+		F::Target: FeeEstimator,
+		L::Target: Logger,
 	{
 		log_info!(logger, "Applying update to monitor {}, bringing update_id from {} to {} with {} changes.",
 			log_funding_info!(self), self.latest_update_id, updates.update_id, updates.updates.len());
@@ -1980,7 +2005,8 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 				},
 				ChannelMonitorUpdateStep::PaymentPreimage { payment_preimage } => {
 					log_trace!(logger, "Updating ChannelMonitor with payment preimage");
-					self.provide_payment_preimage(&PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner()), &payment_preimage, broadcaster, fee_estimator, logger)
+					let bounded_fee_estimator = LowerBoundedFeeEstimator::new(&*fee_estimator);
+					self.provide_payment_preimage(&PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner()), &payment_preimage, broadcaster, &bounded_fee_estimator, logger)
 				},
 				ChannelMonitorUpdateStep::CommitmentSecret { idx, secret } => {
 					log_trace!(logger, "Updating ChannelMonitor with commitment secret");
@@ -2091,7 +2117,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 			};
 		}
 
-		let commitment_number = 0xffffffffffff - ((((tx.input[0].sequence as u64 & 0xffffff) << 3*8) | (tx.lock_time as u64 & 0xffffff)) ^ self.commitment_transaction_number_obscure_factor);
+		let commitment_number = 0xffffffffffff - ((((tx.input[0].sequence.0 as u64 & 0xffffff) << 3*8) | (tx.lock_time.0 as u64 & 0xffffff)) ^ self.commitment_transaction_number_obscure_factor);
 		if commitment_number >= self.get_min_seen_secret() {
 			let secret = self.get_secret(commitment_number).unwrap();
 			let per_commitment_key = ignore_error!(SecretKey::from_slice(&secret));
@@ -2136,13 +2162,13 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 				self.counterparty_commitment_txn_on_chain.insert(commitment_txid, commitment_number);
 
 				if let Some(per_commitment_data) = per_commitment_option {
-					fail_unbroadcast_htlcs!(self, "revoked_counterparty", commitment_txid, height,
+					fail_unbroadcast_htlcs!(self, "revoked_counterparty", commitment_txid, tx, height,
 						per_commitment_data.iter().map(|(htlc, htlc_source)|
 							(htlc, htlc_source.as_ref().map(|htlc_source| htlc_source.as_ref()))
 						), logger);
 				} else {
 					debug_assert!(false, "We should have per-commitment option for any recognized old commitment txn");
-					fail_unbroadcast_htlcs!(self, "revoked counterparty", commitment_txid, height,
+					fail_unbroadcast_htlcs!(self, "revoked counterparty", commitment_txid, tx, height,
 						[].iter().map(|reference| *reference), logger);
 				}
 			}
@@ -2160,7 +2186,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 			self.counterparty_commitment_txn_on_chain.insert(commitment_txid, commitment_number);
 
 			log_info!(logger, "Got broadcast of non-revoked counterparty commitment transaction {}", commitment_txid);
-			fail_unbroadcast_htlcs!(self, "counterparty", commitment_txid, height,
+			fail_unbroadcast_htlcs!(self, "counterparty", commitment_txid, tx, height,
 				per_commitment_data.iter().map(|(htlc, htlc_source)|
 					(htlc, htlc_source.as_ref().map(|htlc_source| htlc_source.as_ref()))
 				), logger);
@@ -2319,7 +2345,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 			let res = self.get_broadcasted_holder_claims(&self.current_holder_commitment_tx, height);
 			let mut to_watch = self.get_broadcasted_holder_watch_outputs(&self.current_holder_commitment_tx, tx);
 			append_onchain_update!(res, to_watch);
-			fail_unbroadcast_htlcs!(self, "latest holder", commitment_txid, height,
+			fail_unbroadcast_htlcs!(self, "latest holder", commitment_txid, tx, height,
 				self.current_holder_commitment_tx.htlc_outputs.iter()
 				.map(|(htlc, _, htlc_source)| (htlc, htlc_source.as_ref())), logger);
 		} else if let &Some(ref holder_tx) = &self.prev_holder_signed_commitment_tx {
@@ -2329,7 +2355,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 				let res = self.get_broadcasted_holder_claims(holder_tx, height);
 				let mut to_watch = self.get_broadcasted_holder_watch_outputs(holder_tx, tx);
 				append_onchain_update!(res, to_watch);
-				fail_unbroadcast_htlcs!(self, "previous holder", commitment_txid, height,
+				fail_unbroadcast_htlcs!(self, "previous holder", commitment_txid, tx, height,
 					holder_tx.htlc_outputs.iter().map(|(htlc, _, htlc_source)| (htlc, htlc_source.as_ref())),
 					logger);
 			}
@@ -2406,7 +2432,8 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		let block_hash = header.block_hash();
 		self.best_block = BestBlock::new(block_hash, height);
 
-		self.transactions_confirmed(header, txdata, height, broadcaster, fee_estimator, logger)
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
+		self.transactions_confirmed(header, txdata, height, broadcaster, &bounded_fee_estimator, logger)
 	}
 
 	fn best_block_updated<B: Deref, F: Deref, L: Deref>(
@@ -2414,7 +2441,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		header: &BlockHeader,
 		height: u32,
 		broadcaster: B,
-		fee_estimator: F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: L,
 	) -> Vec<TransactionOutputs>
 	where
@@ -2441,7 +2468,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		txdata: &TransactionData,
 		height: u32,
 		broadcaster: B,
-		fee_estimator: F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: L,
 	) -> Vec<TransactionOutputs>
 	where
@@ -2475,7 +2502,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 					log_info!(logger, "Channel {} closed by funding output spend in txid {}.",
 						log_bytes!(self.funding_info.0.to_channel_id()), tx.txid());
 					self.funding_spend_seen = true;
-					if (tx.input[0].sequence >> 8*3) as u8 == 0x80 && (tx.lock_time >> 8*3) as u8 == 0x20 {
+					if (tx.input[0].sequence.0 >> 8*3) as u8 == 0x80 && (tx.lock_time.0 >> 8*3) as u8 == 0x20 {
 						let (mut new_outpoints, new_outputs) = self.check_spend_counterparty_transaction(&tx, height, &logger);
 						if !new_outputs.1.is_empty() {
 							watch_outputs.push(new_outputs);
@@ -2494,6 +2521,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 					let txid = tx.txid();
 					self.onchain_events_awaiting_threshold_conf.push(OnchainEventEntry {
 						txid,
+						transaction: Some((*tx).clone()),
 						height: height,
 						event: OnchainEvent::FundingSpendConfirmation {
 							on_local_output_csv: balance_spendable_csv,
@@ -2538,7 +2566,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		mut watch_outputs: Vec<TransactionOutputs>,
 		mut claimable_outpoints: Vec<PackageTemplate>,
 		broadcaster: &B,
-		fee_estimator: &F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: &L,
 	) -> Vec<TransactionOutputs>
 	where
@@ -2676,7 +2704,8 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		//- maturing spendable output has transaction paying us has been disconnected
 		self.onchain_events_awaiting_threshold_conf.retain(|ref entry| entry.height < height);
 
-		self.onchain_tx_handler.block_disconnected(height, broadcaster, fee_estimator, logger);
+		let bounded_fee_estimator = LowerBoundedFeeEstimator::new(fee_estimator);
+		self.onchain_tx_handler.block_disconnected(height, broadcaster, &bounded_fee_estimator, logger);
 
 		self.best_block = BestBlock::new(header.prev_blockhash, height - 1);
 	}
@@ -2685,7 +2714,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		&mut self,
 		txid: &Txid,
 		broadcaster: B,
-		fee_estimator: F,
+		fee_estimator: &LowerBoundedFeeEstimator<F>,
 		logger: L,
 	) where
 		B::Target: BroadcasterInterface,
@@ -2911,7 +2940,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 								let outbound_htlc = $holder_tx == htlc_output.offered;
 								if !outbound_htlc || revocation_sig_claim {
 									self.onchain_events_awaiting_threshold_conf.push(OnchainEventEntry {
-										txid: tx.txid(), height,
+										txid: tx.txid(), height, transaction: Some(tx.clone()),
 										event: OnchainEvent::HTLCSpendConfirmation {
 											commitment_tx_output_idx: input.previous_output.vout,
 											preimage: if accepted_preimage_claim || offered_preimage_claim {
@@ -2963,6 +2992,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 						self.onchain_events_awaiting_threshold_conf.push(OnchainEventEntry {
 							txid: tx.txid(),
 							height,
+							transaction: Some(tx.clone()),
 							event: OnchainEvent::HTLCSpendConfirmation {
 								commitment_tx_output_idx: input.previous_output.vout,
 								preimage: Some(payment_preimage),
@@ -2983,6 +3013,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 						} else { false }) {
 						self.onchain_events_awaiting_threshold_conf.push(OnchainEventEntry {
 							txid: tx.txid(),
+							transaction: Some(tx.clone()),
 							height,
 							event: OnchainEvent::HTLCSpendConfirmation {
 								commitment_tx_output_idx: input.previous_output.vout,
@@ -3009,6 +3040,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 					});
 					let entry = OnchainEventEntry {
 						txid: tx.txid(),
+						transaction: Some(tx.clone()),
 						height,
 						event: OnchainEvent::HTLCUpdate {
 							source, payment_hash,
@@ -3082,6 +3114,7 @@ impl<Signer: Sign> ChannelMonitorImpl<Signer> {
 		if let Some(spendable_output) = spendable_output {
 			let entry = OnchainEventEntry {
 				txid: tx.txid(),
+				transaction: Some(tx.clone()),
 				height: height,
 				event: OnchainEvent::MaturingOutput { descriptor: spendable_output.clone() },
 			};
@@ -3353,60 +3386,58 @@ impl<'a, Signer: Sign, K: KeysInterface<Signer = Signer>> ReadableArgs<&'a K>
 		let mut secp_ctx = Secp256k1::new();
 		secp_ctx.seeded_randomize(&keys_manager.get_secure_random_bytes());
 
-		Ok((best_block.block_hash(), ChannelMonitor {
-			inner: Mutex::new(ChannelMonitorImpl {
-				latest_update_id,
-				commitment_transaction_number_obscure_factor,
+		Ok((best_block.block_hash(), ChannelMonitor::from_impl(ChannelMonitorImpl {
+			latest_update_id,
+			commitment_transaction_number_obscure_factor,
 
-				destination_script,
-				broadcasted_holder_revokable_script,
-				counterparty_payment_script,
-				shutdown_script,
+			destination_script,
+			broadcasted_holder_revokable_script,
+			counterparty_payment_script,
+			shutdown_script,
 
-				channel_keys_id,
-				holder_revocation_basepoint,
-				funding_info,
-				current_counterparty_commitment_txid,
-				prev_counterparty_commitment_txid,
+			channel_keys_id,
+			holder_revocation_basepoint,
+			funding_info,
+			current_counterparty_commitment_txid,
+			prev_counterparty_commitment_txid,
 
-				counterparty_commitment_params,
-				funding_redeemscript,
-				channel_value_satoshis,
-				their_cur_per_commitment_points,
+			counterparty_commitment_params,
+			funding_redeemscript,
+			channel_value_satoshis,
+			their_cur_per_commitment_points,
 
-				on_holder_tx_csv,
+			on_holder_tx_csv,
 
-				commitment_secrets,
-				counterparty_claimable_outpoints,
-				counterparty_commitment_txn_on_chain,
-				counterparty_hash_commitment_number,
+			commitment_secrets,
+			counterparty_claimable_outpoints,
+			counterparty_commitment_txn_on_chain,
+			counterparty_hash_commitment_number,
 
-				prev_holder_signed_commitment_tx,
-				current_holder_commitment_tx,
-				current_counterparty_commitment_number,
-				current_holder_commitment_number,
+			prev_holder_signed_commitment_tx,
+			current_holder_commitment_tx,
+			current_counterparty_commitment_number,
+			current_holder_commitment_number,
 
-				payment_preimages,
-				pending_monitor_events: pending_monitor_events.unwrap(),
-				pending_events,
+			payment_preimages,
+			pending_monitor_events: pending_monitor_events.unwrap(),
+			pending_events,
 
-				onchain_events_awaiting_threshold_conf,
-				outputs_to_watch,
+			onchain_events_awaiting_threshold_conf,
+			outputs_to_watch,
 
-				onchain_tx_handler,
+			onchain_tx_handler,
 
-				lockdown_from_offchain,
-				holder_tx_signed,
-				funding_spend_seen: funding_spend_seen.unwrap(),
-				funding_spend_confirmed,
-				htlcs_resolved_on_chain: htlcs_resolved_on_chain.unwrap(),
+			lockdown_from_offchain,
+			holder_tx_signed,
+			funding_spend_seen: funding_spend_seen.unwrap(),
+			funding_spend_confirmed,
+			htlcs_resolved_on_chain: htlcs_resolved_on_chain.unwrap(),
 
-				best_block,
-				counterparty_node_id,
+			best_block,
+			counterparty_node_id,
 
-				secp_ctx,
-			}),
-		}))
+			secp_ctx,
+		})))
 	}
 }
 
@@ -3428,6 +3459,8 @@ mod tests {
 
 	use hex;
 
+	use crate::chain::chaininterface::LowerBoundedFeeEstimator;
+
 	use super::ChannelMonitorUpdateStep;
 	use ::{check_added_monitors, check_closed_broadcast, check_closed_event, check_spends, get_local_commitment_txn, get_monitor, get_route_and_payment_hash, unwrap_send_err};
 	use chain::{BestBlock, Confirm};
@@ -3448,7 +3481,7 @@ mod tests {
 	use util::ser::{ReadableArgs, Writeable};
 	use sync::{Arc, Mutex};
 	use io;
-	use bitcoin::Witness;
+	use bitcoin::{PackedLockTime, Sequence, TxMerkleNode, Witness};
 	use prelude::*;
 
 	fn do_test_funding_spend_refuses_updates(use_local_txn: bool) {
@@ -3492,7 +3525,7 @@ mod tests {
 		let new_header = BlockHeader {
 			version: 2, time: 0, bits: 0, nonce: 0,
 			prev_blockhash: nodes[0].best_block_info().0,
-			merkle_root: Default::default() };
+			merkle_root: TxMerkleNode::all_zeros() };
 		let conf_height = nodes[0].best_block_info().1 + 1;
 		nodes[1].chain_monitor.chain_monitor.transactions_confirmed(&new_header,
 			&[(0, broadcast_tx)], conf_height);
@@ -3524,7 +3557,7 @@ mod tests {
 
 		let broadcaster = TestBroadcaster::new(Arc::clone(&nodes[1].blocks));
 		assert!(
-			pre_update_monitor.update_monitor(&replay_update, &&broadcaster, &&chanmon_cfgs[1].fee_estimator, &nodes[1].logger)
+			pre_update_monitor.update_monitor(&replay_update, &&broadcaster, &chanmon_cfgs[1].fee_estimator, &nodes[1].logger)
 			.is_err());
 		// Even though we error'd on the first update, we should still have generated an HTLC claim
 		// transaction
@@ -3549,10 +3582,10 @@ mod tests {
 		let secp_ctx = Secp256k1::new();
 		let logger = Arc::new(TestLogger::new());
 		let broadcaster = Arc::new(TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new()), blocks: Arc::new(Mutex::new(Vec::new()))});
-		let fee_estimator = Arc::new(TestFeeEstimator { sat_per_kw: Mutex::new(253) });
+		let fee_estimator = TestFeeEstimator { sat_per_kw: Mutex::new(253) };
 
 		let dummy_key = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
-		let dummy_tx = Transaction { version: 0, lock_time: 0, input: Vec::new(), output: Vec::new() };
+		let dummy_tx = Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() };
 
 		let mut preimages = Vec::new();
 		{
@@ -3618,7 +3651,7 @@ mod tests {
 			delayed_payment_basepoint: PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[47; 32]).unwrap()),
 			htlc_basepoint: PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[48; 32]).unwrap())
 		};
-		let funding_outpoint = OutPoint { txid: Default::default(), index: u16::max_value() };
+		let funding_outpoint = OutPoint { txid: Txid::all_zeros(), index: u16::max_value() };
 		let channel_parameters = ChannelTransactionParameters {
 			holder_pubkeys: keys.holder_channel_pubkeys.clone(),
 			holder_selected_contest_delay: 66,
@@ -3648,7 +3681,8 @@ mod tests {
 		monitor.provide_latest_counterparty_commitment_tx(dummy_txid, preimages_slice_to_htlc_outputs!(preimages[17..20]), 281474976710653, dummy_key, &logger);
 		monitor.provide_latest_counterparty_commitment_tx(dummy_txid, preimages_slice_to_htlc_outputs!(preimages[18..20]), 281474976710652, dummy_key, &logger);
 		for &(ref preimage, ref hash) in preimages.iter() {
-			monitor.provide_payment_preimage(hash, preimage, &broadcaster, &fee_estimator, &logger);
+			let bounded_fee_estimator = LowerBoundedFeeEstimator::new(&fee_estimator);
+			monitor.provide_payment_preimage(hash, preimage, &broadcaster, &bounded_fee_estimator, &logger);
 		}
 
 		// Now provide a secret, pruning preimages 10-15
@@ -3731,7 +3765,7 @@ mod tests {
 
 		// Justice tx with 1 to_holder, 2 revoked offered HTLCs, 1 revoked received HTLCs
 		for &opt_anchors in [false, true].iter() {
-			let mut claim_tx = Transaction { version: 0, lock_time: 0, input: Vec::new(), output: Vec::new() };
+			let mut claim_tx = Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() };
 			let mut sum_actual_sigs = 0;
 			for i in 0..4 {
 				claim_tx.input.push(TxIn {
@@ -3740,7 +3774,7 @@ mod tests {
 						vout: i,
 					},
 					script_sig: Script::new(),
-					sequence: 0xfffffffd,
+					sequence: Sequence::ENABLE_RBF_NO_LOCKTIME,
 					witness: Witness::new(),
 				});
 			}
@@ -3763,7 +3797,7 @@ mod tests {
 
 		// Claim tx with 1 offered HTLCs, 3 received HTLCs
 		for &opt_anchors in [false, true].iter() {
-			let mut claim_tx = Transaction { version: 0, lock_time: 0, input: Vec::new(), output: Vec::new() };
+			let mut claim_tx = Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() };
 			let mut sum_actual_sigs = 0;
 			for i in 0..4 {
 				claim_tx.input.push(TxIn {
@@ -3772,7 +3806,7 @@ mod tests {
 						vout: i,
 					},
 					script_sig: Script::new(),
-					sequence: 0xfffffffd,
+					sequence: Sequence::ENABLE_RBF_NO_LOCKTIME,
 					witness: Witness::new(),
 				});
 			}
@@ -3795,7 +3829,7 @@ mod tests {
 
 		// Justice tx with 1 revoked HTLC-Success tx output
 		for &opt_anchors in [false, true].iter() {
-			let mut claim_tx = Transaction { version: 0, lock_time: 0, input: Vec::new(), output: Vec::new() };
+			let mut claim_tx = Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() };
 			let mut sum_actual_sigs = 0;
 			claim_tx.input.push(TxIn {
 				previous_output: BitcoinOutPoint {
@@ -3803,7 +3837,7 @@ mod tests {
 					vout: 0,
 				},
 				script_sig: Script::new(),
-				sequence: 0xfffffffd,
+				sequence: Sequence::ENABLE_RBF_NO_LOCKTIME,
 				witness: Witness::new(),
 			});
 			claim_tx.output.push(TxOut {