X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Fchannelmonitor.rs;h=e88dd33395c7ca58f0e1c08c2b66d42cfe458960;hb=b49e63b1bc759d49a203a1cd503cace86736e704;hp=70e41ea58dd6f5b9cf5500e4958ef1d5b9f7b1a4;hpb=a2bdadaeedf93df5ffa5e211335ae457b1cfcc70;p=rust-lightning

diff --git a/lightning/src/ln/channelmonitor.rs b/lightning/src/ln/channelmonitor.rs
index 70e41ea5..e88dd333 100644
--- a/lightning/src/ln/channelmonitor.rs
+++ b/lightning/src/ln/channelmonitor.rs
@@ -290,22 +290,15 @@ impl<Key : Send + cmp::Eq + hash::Hash + 'static, ChanSigner: ChannelKeys, T: De
 			hash_map::Entry::Occupied(_) => return Err(MonitorUpdateError("Channel monitor for given key is already present")),
 			hash_map::Entry::Vacant(e) => e,
 		};
-		match monitor.key_storage {
-			Storage::Local { ref funding_info, .. } => {
-				match funding_info {
-					&None => {
-						return Err(MonitorUpdateError("Try to update a useless monitor without funding_txo !"));
-					},
-					&Some((ref outpoint, ref script)) => {
-						log_trace!(self, "Got new Channel Monitor for channel {}", log_bytes!(outpoint.to_channel_id()[..]));
-						self.chain_monitor.install_watch_tx(&outpoint.txid, script);
-						self.chain_monitor.install_watch_outpoint((outpoint.txid, outpoint.index as u32), script);
-					},
-				}
+		match monitor.funding_info {
+			None => {
+				return Err(MonitorUpdateError("Try to update a useless monitor without funding_txo !"));
+			},
+			Some((ref outpoint, ref script)) => {
+				log_trace!(self, "Got new Channel Monitor for channel {}", log_bytes!(outpoint.to_channel_id()[..]));
+				self.chain_monitor.install_watch_tx(&outpoint.txid, script);
+				self.chain_monitor.install_watch_outpoint((outpoint.txid, outpoint.index as u32), script);
 			},
-			Storage::Watchtower { .. } => {
-				self.chain_monitor.watch_all_txn();
-			}
 		}
 		for (txid, outputs) in monitor.get_outputs_to_watch().iter() {
 			for (idx, script) in outputs.iter().enumerate() {
@@ -321,7 +314,7 @@ impl<Key : Send + cmp::Eq + hash::Hash + 'static, ChanSigner: ChannelKeys, T: De
 		let mut monitors = self.monitors.lock().unwrap();
 		match monitors.get_mut(&key) {
 			Some(orig_monitor) => {
-				log_trace!(self, "Updating Channel Monitor for channel {}", log_funding_info!(orig_monitor.key_storage));
+				log_trace!(self, "Updating Channel Monitor for channel {}", log_funding_info!(orig_monitor));
 				orig_monitor.update_monitor(update, &self.broadcaster)
 			},
 			None => Err(MonitorUpdateError("No such monitor registered"))
@@ -398,53 +391,10 @@ pub(crate) const LATENCY_GRACE_PERIOD_BLOCKS: u32 = 3;
 /// keeping bumping another claim tx to solve the outpoint.
 pub(crate) const ANTI_REORG_DELAY: u32 = 6;
 
-enum Storage<ChanSigner: ChannelKeys> {
-	Local {
-		keys: ChanSigner,
-		funding_key: SecretKey,
-		revocation_base_key: SecretKey,
-		htlc_base_key: SecretKey,
-		delayed_payment_base_key: SecretKey,
-		payment_base_key: SecretKey,
-		shutdown_pubkey: PublicKey,
-		funding_info: Option<(OutPoint, Script)>,
-		current_remote_commitment_txid: Option<Sha256dHash>,
-		prev_remote_commitment_txid: Option<Sha256dHash>,
-	},
-	Watchtower {
-		revocation_base_key: PublicKey,
-		htlc_base_key: PublicKey,
-	}
-}
-
-#[cfg(any(test, feature = "fuzztarget"))]
-impl<ChanSigner: ChannelKeys> PartialEq for Storage<ChanSigner> {
-	fn eq(&self, other: &Self) -> bool {
-		match *self {
-			Storage::Local { ref keys, .. } => {
-				let k = keys;
-				match *other {
-					Storage::Local { ref keys, .. } => keys.pubkeys() == k.pubkeys(),
-					Storage::Watchtower { .. } => false,
-				}
-			},
-			Storage::Watchtower {ref revocation_base_key, ref htlc_base_key} => {
-				let (rbk, hbk) = (revocation_base_key, htlc_base_key);
-				match *other {
-					Storage::Local { .. } => false,
-					Storage::Watchtower {ref revocation_base_key, ref htlc_base_key} =>
-						revocation_base_key == rbk && htlc_base_key == hbk,
-				}
-			},
-		}
-	}
-}
-
 #[derive(Clone, PartialEq)]
 struct LocalSignedTx {
 	/// txid of the transaction in tx, just used to make comparison faster
 	txid: Sha256dHash,
-	tx: LocalCommitmentTransaction,
 	revocation_key: PublicKey,
 	a_htlc_key: PublicKey,
 	b_htlc_key: PublicKey,
@@ -474,10 +424,11 @@ pub(crate) enum InputMaterial {
 		locktime: u32,
 	},
 	LocalHTLC {
-		witness_script: Script,
-		sigs: (Signature, Signature),
 		preimage: Option<PaymentPreimage>,
 		amount: u64,
+	},
+	Funding {
+		channel_value: u64,
 	}
 }
 
@@ -500,13 +451,14 @@ impl Writeable for InputMaterial  {
 				writer.write_all(&byte_utils::be64_to_array(*amount))?;
 				writer.write_all(&byte_utils::be32_to_array(*locktime))?;
 			},
-			&InputMaterial::LocalHTLC { ref witness_script, ref sigs, ref preimage, ref amount } => {
+			&InputMaterial::LocalHTLC { ref preimage, ref amount } => {
 				writer.write_all(&[2; 1])?;
-				witness_script.write(writer)?;
-				sigs.0.write(writer)?;
-				sigs.1.write(writer)?;
 				preimage.write(writer)?;
 				writer.write_all(&byte_utils::be64_to_array(*amount))?;
+			},
+			&InputMaterial::Funding { ref channel_value } => {
+				writer.write_all(&[3; 1])?;
+				channel_value.write(writer)?;
 			}
 		}
 		Ok(())
@@ -545,16 +497,17 @@ impl Readable for InputMaterial {
 				}
 			},
 			2 => {
-				let witness_script = Readable::read(reader)?;
-				let their_sig = Readable::read(reader)?;
-				let our_sig = Readable::read(reader)?;
 				let preimage = Readable::read(reader)?;
 				let amount = Readable::read(reader)?;
 				InputMaterial::LocalHTLC {
-					witness_script,
-					sigs: (their_sig, our_sig),
 					preimage,
-					amount
+					amount,
+				}
+			},
+			3 => {
+				let channel_value = Readable::read(reader)?;
+				InputMaterial::Funding {
+					channel_value
 				}
 			}
 			_ => return Err(DecodeError::InvalidValue),
@@ -595,6 +548,9 @@ enum OnchainEvent {
 	HTLCUpdate {
 		htlc_update: (HTLCSource, PaymentHash),
 	},
+	MaturingOutput {
+		descriptor: SpendableOutputDescriptor,
+	},
 }
 
 const SERIALIZATION_VERSION: u8 = 1;
@@ -761,8 +717,14 @@ pub struct ChannelMonitor<ChanSigner: ChannelKeys> {
 
 	destination_script: Script,
 	broadcasted_local_revokable_script: Option<(Script, SecretKey, Script)>,
+	broadcasted_remote_payment_script: Option<(Script, SecretKey)>,
+	shutdown_script: Script,
+
+	keys: ChanSigner,
+	funding_info: Option<(OutPoint, Script)>,
+	current_remote_commitment_txid: Option<Sha256dHash>,
+	prev_remote_commitment_txid: Option<Sha256dHash>,
 
-	key_storage: Storage<ChanSigner>,
 	their_htlc_base_key: Option<PublicKey>,
 	their_delayed_payment_base_key: Option<PublicKey>,
 	funding_redeemscript: Option<Script>,
@@ -797,17 +759,15 @@ pub struct ChannelMonitor<ChanSigner: ChannelKeys> {
 	// Used just for ChannelManager to make sure it has the latest channel data during
 	// deserialization
 	current_remote_commitment_number: u64,
+	// Used just for ChannelManager to make sure it has the latest channel data during
+	// deserialization
+	current_local_commitment_number: u64,
 
 	payment_preimages: HashMap<PaymentHash, PaymentPreimage>,
 
 	pending_htlcs_updated: Vec<HTLCUpdate>,
 	pending_events: Vec<events::Event>,
 
-	// Thanks to data loss protection, we may be able to claim our non-htlc funds
-	// back, this is the script we have to spend from but we need to
-	// scan every commitment transaction for that
-	to_remote_rescue: Option<(Script, SecretKey)>,
-
 	// Used to track onchain events, i.e transactions parts of channels confirmed on chain, on which
 	// we have to take actions once they reach enough confs. Key is a block height timer, i.e we enforce
 	// actions when we receive a block with given height. Actions depend on OnchainEvent type.
@@ -820,9 +780,12 @@ pub struct ChannelMonitor<ChanSigner: ChannelKeys> {
 	outputs_to_watch: HashMap<Sha256dHash, Vec<Script>>,
 
 	#[cfg(test)]
-	pub onchain_tx_handler: OnchainTxHandler,
+	pub onchain_tx_handler: OnchainTxHandler<ChanSigner>,
 	#[cfg(not(test))]
-	onchain_tx_handler: OnchainTxHandler,
+	onchain_tx_handler: OnchainTxHandler<ChanSigner>,
+
+	// Used to detect programming bug due to unsafe monitor update sequence { ChannelForceClosed, LatestLocalCommitmentTXInfo }
+	lockdown_from_offchain: bool,
 
 	// We simply modify last_block_hash in Channel's block_connected so that serialization is
 	// consistent but hopefully the users' copy handles block_connected in a consistent way.
@@ -843,7 +806,11 @@ impl<ChanSigner: ChannelKeys> PartialEq for ChannelMonitor<ChanSigner> {
 			self.commitment_transaction_number_obscure_factor != other.commitment_transaction_number_obscure_factor ||
 			self.destination_script != other.destination_script ||
 			self.broadcasted_local_revokable_script != other.broadcasted_local_revokable_script ||
-			self.key_storage != other.key_storage ||
+			self.broadcasted_remote_payment_script != other.broadcasted_remote_payment_script ||
+			self.keys.pubkeys() != other.keys.pubkeys() ||
+			self.funding_info != other.funding_info ||
+			self.current_remote_commitment_txid != other.current_remote_commitment_txid ||
+			self.prev_remote_commitment_txid != other.prev_remote_commitment_txid ||
 			self.their_htlc_base_key != other.their_htlc_base_key ||
 			self.their_delayed_payment_base_key != other.their_delayed_payment_base_key ||
 			self.funding_redeemscript != other.funding_redeemscript ||
@@ -857,11 +824,11 @@ impl<ChanSigner: ChannelKeys> PartialEq for ChannelMonitor<ChanSigner> {
 			self.remote_hash_commitment_number != other.remote_hash_commitment_number ||
 			self.prev_local_signed_commitment_tx != other.prev_local_signed_commitment_tx ||
 			self.current_remote_commitment_number != other.current_remote_commitment_number ||
+			self.current_local_commitment_number != other.current_local_commitment_number ||
 			self.current_local_signed_commitment_tx != other.current_local_signed_commitment_tx ||
 			self.payment_preimages != other.payment_preimages ||
 			self.pending_htlcs_updated != other.pending_htlcs_updated ||
 			self.pending_events.len() != other.pending_events.len() || // We trust events to round-trip properly
-			self.to_remote_rescue != other.to_remote_rescue ||
 			self.onchain_events_waiting_threshold_conf != other.onchain_events_waiting_threshold_conf ||
 			self.outputs_to_watch != other.outputs_to_watch
 		{
@@ -895,31 +862,28 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
 			writer.write_all(&[1; 1])?;
 		}
 
-		match self.key_storage {
-			Storage::Local { ref keys, ref funding_key, ref revocation_base_key, ref htlc_base_key, ref delayed_payment_base_key, ref payment_base_key, ref shutdown_pubkey, ref funding_info, ref current_remote_commitment_txid, ref prev_remote_commitment_txid } => {
-				writer.write_all(&[0; 1])?;
-				keys.write(writer)?;
-				writer.write_all(&funding_key[..])?;
-				writer.write_all(&revocation_base_key[..])?;
-				writer.write_all(&htlc_base_key[..])?;
-				writer.write_all(&delayed_payment_base_key[..])?;
-				writer.write_all(&payment_base_key[..])?;
-				writer.write_all(&shutdown_pubkey.serialize())?;
-				match funding_info  {
-					&Some((ref outpoint, ref script)) => {
-						writer.write_all(&outpoint.txid[..])?;
-						writer.write_all(&byte_utils::be16_to_array(outpoint.index))?;
-						script.write(writer)?;
-					},
-					&None => {
-						debug_assert!(false, "Try to serialize a useless Local monitor !");
-					},
-				}
-				current_remote_commitment_txid.write(writer)?;
-				prev_remote_commitment_txid.write(writer)?;
+		if let Some(ref broadcasted_remote_payment_script) = self.broadcasted_remote_payment_script {
+			writer.write_all(&[0; 1])?;
+			broadcasted_remote_payment_script.0.write(writer)?;
+			broadcasted_remote_payment_script.1.write(writer)?;
+		} else {
+			writer.write_all(&[1; 1])?;
+		}
+		self.shutdown_script.write(writer)?;
+
+		self.keys.write(writer)?;
+		match self.funding_info  {
+			Some((ref outpoint, ref script)) => {
+				writer.write_all(&outpoint.txid[..])?;
+				writer.write_all(&byte_utils::be16_to_array(outpoint.index))?;
+				script.write(writer)?;
+			},
+			None => {
+				debug_assert!(false, "Try to serialize a useless Local monitor !");
 			},
-			Storage::Watchtower { .. } => unimplemented!(),
 		}
+		self.current_remote_commitment_txid.write(writer)?;
+		self.prev_remote_commitment_txid.write(writer)?;
 
 		writer.write_all(&self.their_htlc_base_key.as_ref().unwrap().serialize())?;
 		writer.write_all(&self.their_delayed_payment_base_key.as_ref().unwrap().serialize())?;
@@ -991,7 +955,7 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
 
 		macro_rules! serialize_local_tx {
 			($local_tx: expr) => {
-				$local_tx.tx.write(writer)?;
+				$local_tx.txid.write(writer)?;
 				writer.write_all(&$local_tx.revocation_key.serialize())?;
 				writer.write_all(&$local_tx.a_htlc_key.serialize())?;
 				writer.write_all(&$local_tx.b_htlc_key.serialize())?;
@@ -1033,6 +997,12 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
 			writer.write_all(&byte_utils::be48_to_array(0))?;
 		}
 
+		if for_local_storage {
+			writer.write_all(&byte_utils::be48_to_array(self.current_local_commitment_number))?;
+		} else {
+			writer.write_all(&byte_utils::be48_to_array(0))?;
+		}
+
 		writer.write_all(&byte_utils::be64_to_array(self.payment_preimages.len() as u64))?;
 		for payment_preimage in self.payment_preimages.values() {
 			writer.write_all(&payment_preimage.0[..])?;
@@ -1049,13 +1019,6 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
 		}
 
 		self.last_block_hash.write(writer)?;
-		if let Some((ref to_remote_script, ref local_key)) = self.to_remote_rescue {
-			writer.write_all(&[1; 1])?;
-			to_remote_script.write(writer)?;
-			local_key.write(writer)?;
-		} else {
-			writer.write_all(&[0; 1])?;
-		}
 
 		writer.write_all(&byte_utils::be64_to_array(self.onchain_events_waiting_threshold_conf.len() as u64))?;
 		for (ref target, ref events) in self.onchain_events_waiting_threshold_conf.iter() {
@@ -1068,6 +1031,10 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
 						htlc_update.0.write(writer)?;
 						htlc_update.1.write(writer)?;
 					},
+					OnchainEvent::MaturingOutput { ref descriptor } => {
+						1u8.write(writer)?;
+						descriptor.write(writer)?;
+					},
 				}
 			}
 		}
@@ -1082,6 +1049,8 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
 		}
 		self.onchain_tx_handler.write(writer)?;
 
+		self.lockdown_from_offchain.write(writer)?;
+
 		Ok(())
 	}
 
@@ -1117,33 +1086,26 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 			logger: Arc<Logger>) -> ChannelMonitor<ChanSigner> {
 
 		assert!(commitment_transaction_number_obscure_factor <= (1 << 48));
-		let funding_key = keys.funding_key().clone();
-		let revocation_base_key = keys.revocation_base_key().clone();
-		let htlc_base_key = keys.htlc_base_key().clone();
-		let delayed_payment_base_key = keys.delayed_payment_base_key().clone();
-		let payment_base_key = keys.payment_base_key().clone();
+		let our_channel_close_key_hash = Hash160::hash(&shutdown_pubkey.serialize());
+		let shutdown_script = Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script();
+
 		ChannelMonitor {
 			latest_update_id: 0,
 			commitment_transaction_number_obscure_factor,
 
 			destination_script: destination_script.clone(),
 			broadcasted_local_revokable_script: None,
+			broadcasted_remote_payment_script: None,
+			shutdown_script,
+
+			keys: keys.clone(),
+			funding_info: Some(funding_info),
+			current_remote_commitment_txid: None,
+			prev_remote_commitment_txid: None,
 
-			key_storage: Storage::Local {
-				keys,
-				funding_key,
-				revocation_base_key,
-				htlc_base_key,
-				delayed_payment_base_key,
-				payment_base_key,
-				shutdown_pubkey: shutdown_pubkey.clone(),
-				funding_info: Some(funding_info),
-				current_remote_commitment_txid: None,
-				prev_remote_commitment_txid: None,
-			},
 			their_htlc_base_key: Some(their_htlc_base_key.clone()),
 			their_delayed_payment_base_key: Some(their_delayed_payment_base_key.clone()),
-			funding_redeemscript: Some(funding_redeemscript),
+			funding_redeemscript: Some(funding_redeemscript.clone()),
 			channel_value_satoshis: Some(channel_value_satoshis),
 			their_cur_revocation_points: None,
 
@@ -1158,17 +1120,18 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 			prev_local_signed_commitment_tx: None,
 			current_local_signed_commitment_tx: None,
 			current_remote_commitment_number: 1 << 48,
+			current_local_commitment_number: 0xffff_ffff_ffff,
 
 			payment_preimages: HashMap::new(),
 			pending_htlcs_updated: Vec::new(),
 			pending_events: Vec::new(),
 
-			to_remote_rescue: None,
-
 			onchain_events_waiting_threshold_conf: HashMap::new(),
 			outputs_to_watch: HashMap::new(),
 
-			onchain_tx_handler: OnchainTxHandler::new(destination_script.clone(), logger.clone()),
+			onchain_tx_handler: OnchainTxHandler::new(destination_script.clone(), keys, funding_redeemscript, their_to_self_delay, logger.clone()),
+
+			lockdown_from_offchain: false,
 
 			last_block_hash: Default::default(),
 			secp_ctx: Secp256k1::new(),
@@ -1186,11 +1149,9 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 
 		// Prune HTLCs from the previous remote commitment tx so we don't generate failure/fulfill
 		// events for now-revoked/fulfilled HTLCs.
-		if let Storage::Local { ref mut prev_remote_commitment_txid, .. } = self.key_storage {
-			if let Some(txid) = prev_remote_commitment_txid.take() {
-				for &mut (_, ref mut source) in self.remote_claimable_outpoints.get_mut(&txid).unwrap() {
-					*source = None;
-				}
+		if let Some(txid) = self.prev_remote_commitment_txid.take() {
+			for &mut (_, ref mut source) in self.remote_claimable_outpoints.get_mut(&txid).unwrap() {
+				*source = None;
 			}
 		}
 
@@ -1245,10 +1206,8 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 		let new_txid = unsigned_commitment_tx.txid();
 		log_trace!(self, "Tracking new remote commitment transaction with txid {} at commitment number {} with {} HTLC outputs", new_txid, commitment_number, htlc_outputs.len());
 		log_trace!(self, "New potential remote commitment transaction: {}", encode::serialize_hex(unsigned_commitment_tx));
-		if let Storage::Local { ref mut current_remote_commitment_txid, ref mut prev_remote_commitment_txid, .. } = self.key_storage {
-			*prev_remote_commitment_txid = current_remote_commitment_txid.take();
-			*current_remote_commitment_txid = Some(new_txid);
-		}
+		self.prev_remote_commitment_txid = self.current_remote_commitment_txid.take();
+		self.current_remote_commitment_txid = Some(new_txid);
 		self.remote_claimable_outpoints.insert(new_txid, htlc_outputs);
 		self.current_remote_commitment_number = commitment_number;
 		//TODO: Merge this into the other per-remote-transaction output storage stuff
@@ -1273,18 +1232,13 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 	}
 
 	pub(super) fn provide_rescue_remote_commitment_tx_info(&mut self, their_revocation_point: PublicKey) {
-		match self.key_storage {
-			Storage::Local { ref payment_base_key, ref keys, .. } => {
-				if let Ok(payment_key) = chan_utils::derive_public_key(&self.secp_ctx, &their_revocation_point, &keys.pubkeys().payment_basepoint) {
-					let to_remote_script =  Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0)
-						.push_slice(&Hash160::hash(&payment_key.serialize())[..])
-						.into_script();
-					if let Ok(to_remote_key) = chan_utils::derive_private_key(&self.secp_ctx, &their_revocation_point, &payment_base_key) {
-						self.to_remote_rescue = Some((to_remote_script, to_remote_key));
-					}
-				}
-			},
-			Storage::Watchtower { .. } => {}
+		if let Ok(payment_key) = chan_utils::derive_public_key(&self.secp_ctx, &their_revocation_point, &self.keys.pubkeys().payment_basepoint) {
+			let to_remote_script =  Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0)
+				.push_slice(&Hash160::hash(&payment_key.serialize())[..])
+				.into_script();
+			if let Ok(to_remote_key) = chan_utils::derive_private_key(&self.secp_ctx, &their_revocation_point, &self.keys.payment_base_key()) {
+				self.broadcasted_remote_payment_script = Some((to_remote_script, to_remote_key));
+			}
 		}
 	}
 
@@ -1293,21 +1247,39 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 	/// is important that any clones of this channel monitor (including remote clones) by kept
 	/// up-to-date as our local commitment transaction is updated.
 	/// Panics if set_their_to_self_delay has never been called.
-	pub(super) fn provide_latest_local_commitment_tx_info(&mut self, commitment_tx: LocalCommitmentTransaction, local_keys: chan_utils::TxCreationKeys, feerate_per_kw: u64, htlc_outputs: Vec<(HTLCOutputInCommitment, Option<Signature>, Option<HTLCSource>)>) -> Result<(), MonitorUpdateError> {
+	pub(super) fn provide_latest_local_commitment_tx_info(&mut self, mut commitment_tx: LocalCommitmentTransaction, local_keys: chan_utils::TxCreationKeys, feerate_per_kw: u64, htlc_outputs: Vec<(HTLCOutputInCommitment, Option<Signature>, Option<HTLCSource>)>) -> Result<(), MonitorUpdateError> {
 		if self.their_to_self_delay.is_none() {
 			return Err(MonitorUpdateError("Got a local commitment tx info update before we'd set basic information about the channel"));
 		}
+		let txid = commitment_tx.txid();
+		let sequence = commitment_tx.without_valid_witness().input[0].sequence as u64;
+		let locktime = commitment_tx.without_valid_witness().lock_time as u64;
+		let mut htlcs = Vec::with_capacity(htlc_outputs.len());
+		for htlc in htlc_outputs.clone() {
+			if let Some(_) = htlc.0.transaction_output_index {
+				htlcs.push((htlc.0, htlc.1, None));
+			}
+		}
+		commitment_tx.set_htlc_cache(local_keys.clone(), feerate_per_kw, htlcs);
+		// Returning a monitor error before updating tracking points means in case of using
+		// a concurrent watchtower implementation for same channel, if this one doesn't
+		// reject update as we do, you MAY have the latest local valid commitment tx onchain
+		// for which you want to spend outputs. We're NOT robust again this scenario right
+		// now but we should consider it later.
+		if let Err(_) = self.onchain_tx_handler.provide_latest_local_tx(commitment_tx) {
+			return Err(MonitorUpdateError("Local commitment signed has already been signed, no further update of LOCAL commitment transaction is allowed"));
+		}
+		self.current_local_commitment_number = 0xffff_ffff_ffff - ((((sequence & 0xffffff) << 3*8) | (locktime as u64 & 0xffffff)) ^ self.commitment_transaction_number_obscure_factor);
 		self.prev_local_signed_commitment_tx = self.current_local_signed_commitment_tx.take();
 		self.current_local_signed_commitment_tx = Some(LocalSignedTx {
-			txid: commitment_tx.txid(),
-			tx: commitment_tx,
+			txid,
 			revocation_key: local_keys.revocation_key,
 			a_htlc_key: local_keys.a_htlc_key,
 			b_htlc_key: local_keys.b_htlc_key,
 			delayed_payment_key: local_keys.a_delayed_payment_key,
 			per_commitment_point: local_keys.per_commitment_point,
 			feerate_per_kw,
-			htlc_outputs,
+			htlc_outputs: htlc_outputs,
 		});
 		Ok(())
 	}
@@ -1330,8 +1302,10 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 	pub(super) fn update_monitor_ooo(&mut self, mut updates: ChannelMonitorUpdate) -> Result<(), MonitorUpdateError> {
 		for update in updates.updates.drain(..) {
 			match update {
-				ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { commitment_tx, local_keys, feerate_per_kw, htlc_outputs } =>
-					self.provide_latest_local_commitment_tx_info(commitment_tx, local_keys, feerate_per_kw, htlc_outputs)?,
+				ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { commitment_tx, local_keys, feerate_per_kw, htlc_outputs } => {
+					if self.lockdown_from_offchain { panic!(); }
+					self.provide_latest_local_commitment_tx_info(commitment_tx, local_keys, feerate_per_kw, htlc_outputs)?
+				},
 				ChannelMonitorUpdateStep::LatestRemoteCommitmentTXInfo { unsigned_commitment_tx, htlc_outputs, commitment_number, their_revocation_point } =>
 					self.provide_latest_remote_commitment_tx_info(&unsigned_commitment_tx, htlc_outputs, commitment_number, their_revocation_point),
 				ChannelMonitorUpdateStep::PaymentPreimage { payment_preimage } =>
@@ -1359,8 +1333,10 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 		}
 		for update in updates.updates.drain(..) {
 			match update {
-				ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { commitment_tx, local_keys, feerate_per_kw, htlc_outputs } =>
-					self.provide_latest_local_commitment_tx_info(commitment_tx, local_keys, feerate_per_kw, htlc_outputs)?,
+				ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { commitment_tx, local_keys, feerate_per_kw, htlc_outputs } => {
+					if self.lockdown_from_offchain { panic!(); }
+					self.provide_latest_local_commitment_tx_info(commitment_tx, local_keys, feerate_per_kw, htlc_outputs)?
+				},
 				ChannelMonitorUpdateStep::LatestRemoteCommitmentTXInfo { unsigned_commitment_tx, htlc_outputs, commitment_number, their_revocation_point } =>
 					self.provide_latest_remote_commitment_tx_info(&unsigned_commitment_tx, htlc_outputs, commitment_number, their_revocation_point),
 				ChannelMonitorUpdateStep::PaymentPreimage { payment_preimage } =>
@@ -1370,6 +1346,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 				ChannelMonitorUpdateStep::RescueRemoteCommitmentTXInfo { their_current_per_commitment_point } =>
 					self.provide_rescue_remote_commitment_tx_info(their_current_per_commitment_point),
 				ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast } => {
+					self.lockdown_from_offchain = true;
 					if should_broadcast {
 						self.broadcast_latest_local_commitment_txn(broadcaster);
 					} else {
@@ -1390,17 +1367,10 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 
 	/// Gets the funding transaction outpoint of the channel this ChannelMonitor is monitoring for.
 	pub fn get_funding_txo(&self) -> Option<OutPoint> {
-		match self.key_storage {
-			Storage::Local { ref funding_info, .. } => {
-				match funding_info {
-					&Some((outpoint, _)) => Some(outpoint),
-					&None => None
-				}
-			},
-			Storage::Watchtower { .. } => {
-				return None;
-			}
+		if let Some((outp, _)) = self.funding_info {
+			return Some(outp)
 		}
+		None
 	}
 
 	/// Gets a list of txids, with their output scripts (in the order they appear in the
@@ -1457,9 +1427,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 	}
 
 	pub(super) fn get_cur_local_commitment_number(&self) -> u64 {
-		if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
-			0xffff_ffff_ffff - ((((local_tx.tx.without_valid_witness().input[0].sequence as u64 & 0xffffff) << 3*8) | (local_tx.tx.without_valid_witness().lock_time as u64 & 0xffffff)) ^ self.commitment_transaction_number_obscure_factor)
-		} else { 0xffff_ffff_ffff }
+		self.current_local_commitment_number
 	}
 
 	/// Attempts to claim a remote commitment transaction's outputs using the revocation key and
@@ -1468,12 +1436,11 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 	/// HTLC-Success/HTLC-Timeout transactions.
 	/// Return updates for HTLC pending in the channel and failed automatically by the broadcast of
 	/// revoked remote commitment tx
-	fn check_spend_remote_transaction(&mut self, tx: &Transaction, height: u32) -> (Vec<ClaimRequest>, (Sha256dHash, Vec<TxOut>), Vec<SpendableOutputDescriptor>) {
+	fn check_spend_remote_transaction(&mut self, tx: &Transaction, height: u32) -> (Vec<ClaimRequest>, (Sha256dHash, Vec<TxOut>)) {
 		// Most secp and related errors trying to create keys means we have no hope of constructing
 		// a spend transaction...so we return no transactions to broadcast
 		let mut claimable_outpoints = Vec::new();
 		let mut watch_outputs = Vec::new();
-		let mut spendable_outputs = Vec::new();
 
 		let commitment_txid = tx.txid(); //TODO: This is gonna be a performance bottleneck for watchtowers!
 		let per_commitment_option = self.remote_claimable_outpoints.get(&commitment_txid);
@@ -1482,7 +1449,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 			( $thing : expr ) => {
 				match $thing {
 					Ok(a) => a,
-					Err(_) => return (claimable_outpoints, (commitment_txid, watch_outputs), spendable_outputs)
+					Err(_) => return (claimable_outpoints, (commitment_txid, watch_outputs))
 				}
 			};
 		}
@@ -1491,45 +1458,32 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 		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));
-			let (revocation_pubkey, revocation_key, b_htlc_key, local_payment_key) = match self.key_storage {
-				Storage::Local { ref keys, ref revocation_base_key, ref payment_base_key, .. } => {
-					let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key);
-					(ignore_error!(chan_utils::derive_public_revocation_key(&self.secp_ctx, &per_commitment_point, &keys.pubkeys().revocation_basepoint)),
-					ignore_error!(chan_utils::derive_private_revocation_key(&self.secp_ctx, &per_commitment_key, &revocation_base_key)),
-					ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &per_commitment_point, &keys.pubkeys().htlc_basepoint)),
-					Some(ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, &per_commitment_point, &payment_base_key))))
-				},
-				Storage::Watchtower { .. } => {
-					unimplemented!()
-				},
-			};
+			let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key);
+			let revocation_pubkey = ignore_error!(chan_utils::derive_public_revocation_key(&self.secp_ctx, &per_commitment_point, &self.keys.pubkeys().revocation_basepoint));
+			let revocation_key = ignore_error!(chan_utils::derive_private_revocation_key(&self.secp_ctx, &per_commitment_key, &self.keys.revocation_base_key()));
+			let b_htlc_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &per_commitment_point, &self.keys.pubkeys().htlc_basepoint));
+			let local_payment_key = ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, &per_commitment_point, &self.keys.payment_base_key()));
 			let delayed_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key), &self.their_delayed_payment_base_key.unwrap()));
 			let a_htlc_key = match self.their_htlc_base_key {
-				None => return (claimable_outpoints, (commitment_txid, watch_outputs), spendable_outputs),
+				None => return (claimable_outpoints, (commitment_txid, watch_outputs)),
 				Some(their_htlc_base_key) => ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key), &their_htlc_base_key)),
 			};
 
 			let revokeable_redeemscript = chan_utils::get_revokeable_redeemscript(&revocation_pubkey, self.our_to_self_delay, &delayed_key);
 			let revokeable_p2wsh = revokeable_redeemscript.to_v0_p2wsh();
 
-			let local_payment_p2wpkh = if let Some(payment_key) = local_payment_key {
+			self.broadcasted_remote_payment_script = {
 				// Note that the Network here is ignored as we immediately drop the address for the
-				// script_pubkey version.
-				let payment_hash160 = Hash160::hash(&PublicKey::from_secret_key(&self.secp_ctx, &payment_key).serialize());
-				Some(Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&payment_hash160[..]).into_script())
-			} else { None };
+				// script_pubkey version
+				let payment_hash160 = Hash160::hash(&PublicKey::from_secret_key(&self.secp_ctx, &local_payment_key).serialize());
+				Some((Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&payment_hash160[..]).into_script(), local_payment_key))
+			};
 
 			// First, process non-htlc outputs (to_local & to_remote)
 			for (idx, outp) in tx.output.iter().enumerate() {
 				if outp.script_pubkey == revokeable_p2wsh {
 					let witness_data = InputMaterial::Revoked { witness_script: revokeable_redeemscript.clone(), pubkey: Some(revocation_pubkey), key: revocation_key, is_htlc: false, amount: outp.value };
 					claimable_outpoints.push(ClaimRequest { absolute_timelock: height + self.our_to_self_delay as u32, aggregable: true, outpoint: BitcoinOutPoint { txid: commitment_txid, vout: idx as u32 }, witness_data});
-				} else if Some(&outp.script_pubkey) == local_payment_p2wpkh.as_ref() {
-					spendable_outputs.push(SpendableOutputDescriptor::DynamicOutputP2WPKH {
-						outpoint: BitcoinOutPoint { txid: commitment_txid, vout: idx as u32 },
-						key: local_payment_key.unwrap(),
-						output: outp.clone(),
-					});
 				}
 			}
 
@@ -1541,7 +1495,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 						if transaction_output_index as usize >= tx.output.len() ||
 								tx.output[transaction_output_index as usize].value != htlc.amount_msat / 1000 ||
 								tx.output[transaction_output_index as usize].script_pubkey != expected_script.to_v0_p2wsh() {
-							return (claimable_outpoints, (commitment_txid, watch_outputs), spendable_outputs); // Corrupted per_commitment_data, fuck this user
+							return (claimable_outpoints, (commitment_txid, watch_outputs)); // Corrupted per_commitment_data, fuck this user
 						}
 						let witness_data = InputMaterial::Revoked { witness_script: expected_script, pubkey: Some(revocation_pubkey), key: revocation_key, is_htlc: true, amount: tx.output[transaction_output_index as usize].value };
 						claimable_outpoints.push(ClaimRequest { absolute_timelock: htlc.cltv_expiry, aggregable: true, outpoint: BitcoinOutPoint { txid: commitment_txid, vout: transaction_output_index }, witness_data });
@@ -1570,6 +1524,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 													OnchainEvent::HTLCUpdate { ref htlc_update } => {
 														return htlc_update.0 != **source
 													},
+													_ => true
 												}
 											});
 											e.push(OnchainEvent::HTLCUpdate { htlc_update: ((**source).clone(), htlc.payment_hash.clone())});
@@ -1583,13 +1538,11 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 						}
 					}
 				}
-				if let Storage::Local { ref current_remote_commitment_txid, ref prev_remote_commitment_txid, .. } = self.key_storage {
-					if let &Some(ref txid) = current_remote_commitment_txid {
-						check_htlc_fails!(txid, "current");
-					}
-					if let &Some(ref txid) = prev_remote_commitment_txid {
-						check_htlc_fails!(txid, "remote");
-					}
+				if let Some(ref txid) = self.current_remote_commitment_txid {
+					check_htlc_fails!(txid, "current");
+				}
+				if let Some(ref txid) = self.prev_remote_commitment_txid {
+					check_htlc_fails!(txid, "remote");
 				}
 				// No need to check local commitment txn, symmetric HTLCSource must be present as per-htlc data on remote commitment tx
 			}
@@ -1634,6 +1587,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 												OnchainEvent::HTLCUpdate { ref htlc_update } => {
 													return htlc_update.0 != **source
 												},
+												_ => true
 											}
 										});
 										e.push(OnchainEvent::HTLCUpdate { htlc_update: ((**source).clone(), htlc.payment_hash.clone())});
@@ -1647,13 +1601,11 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 					}
 				}
 			}
-			if let Storage::Local { ref current_remote_commitment_txid, ref prev_remote_commitment_txid, .. } = self.key_storage {
-				if let &Some(ref txid) = current_remote_commitment_txid {
-					check_htlc_fails!(txid, "current", 'current_loop);
-				}
-				if let &Some(ref txid) = prev_remote_commitment_txid {
-					check_htlc_fails!(txid, "previous", 'prev_loop);
-				}
+			if let Some(ref txid) = self.current_remote_commitment_txid {
+				check_htlc_fails!(txid, "current", 'current_loop);
+			}
+			if let Some(ref txid) = self.prev_remote_commitment_txid {
+				check_htlc_fails!(txid, "previous", 'prev_loop);
 			}
 
 			if let Some(revocation_points) = self.their_cur_revocation_points {
@@ -1663,37 +1615,21 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 						if revocation_points.0 == commitment_number + 1 { Some(point) } else { None }
 					} else { None };
 				if let Some(revocation_point) = revocation_point_option {
-					let (revocation_pubkey, b_htlc_key, htlc_privkey) = match self.key_storage {
-						Storage::Local { ref keys, ref htlc_base_key, .. } => {
-							(ignore_error!(chan_utils::derive_public_revocation_key(&self.secp_ctx, revocation_point, &keys.pubkeys().revocation_basepoint)),
-							ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, revocation_point, &keys.pubkeys().htlc_basepoint)),
-							ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, revocation_point, &htlc_base_key)))
-						},
-						Storage::Watchtower { .. } => { unimplemented!() }
-					};
+					let revocation_pubkey = ignore_error!(chan_utils::derive_public_revocation_key(&self.secp_ctx, revocation_point, &self.keys.pubkeys().revocation_basepoint));
+					let b_htlc_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, revocation_point, &self.keys.pubkeys().htlc_basepoint));
+					let htlc_privkey = ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, revocation_point, &self.keys.htlc_base_key()));
 					let a_htlc_key = match self.their_htlc_base_key {
-						None => return (claimable_outpoints, (commitment_txid, watch_outputs), spendable_outputs),
+						None => return (claimable_outpoints, (commitment_txid, watch_outputs)),
 						Some(their_htlc_base_key) => ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, revocation_point, &their_htlc_base_key)),
 					};
+					let local_payment_key = ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, revocation_point, &self.keys.payment_base_key()));
 
-					// First, mark as spendable our to_remote output
-					for (idx, outp) in tx.output.iter().enumerate() {
-						if outp.script_pubkey.is_v0_p2wpkh() {
-							match self.key_storage {
-								Storage::Local { ref payment_base_key, .. } => {
-									if let Ok(local_key) = chan_utils::derive_private_key(&self.secp_ctx, &revocation_point, &payment_base_key) {
-										spendable_outputs.push(SpendableOutputDescriptor::DynamicOutputP2WPKH {
-											outpoint: BitcoinOutPoint { txid: commitment_txid, vout: idx as u32 },
-											key: local_key,
-											output: outp.clone(),
-										});
-									}
-								},
-								Storage::Watchtower { .. } => {}
-							}
-							break; // Only to_remote ouput is claimable
-						}
-					}
+					self.broadcasted_remote_payment_script = {
+						// Note that the Network here is ignored as we immediately drop the address for the
+						// script_pubkey version
+						let payment_hash160 = Hash160::hash(&PublicKey::from_secret_key(&self.secp_ctx, &local_payment_key).serialize());
+						Some((Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&payment_hash160[..]).into_script(), local_payment_key))
+					};
 
 					// Then, try to find htlc outputs
 					for (_, &(ref htlc, _)) in per_commitment_data.iter().enumerate() {
@@ -1702,7 +1638,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 							if transaction_output_index as usize >= tx.output.len() ||
 									tx.output[transaction_output_index as usize].value != htlc.amount_msat / 1000 ||
 									tx.output[transaction_output_index as usize].script_pubkey != expected_script.to_v0_p2wsh() {
-								return (claimable_outpoints, (commitment_txid, watch_outputs), spendable_outputs); // Corrupted per_commitment_data, fuck this user
+								return (claimable_outpoints, (commitment_txid, watch_outputs)); // Corrupted per_commitment_data, fuck this user
 							}
 							let preimage = if htlc.offered { if let Some(p) = self.payment_preimages.get(&htlc.payment_hash) { Some(*p) } else { None } } else { None };
 							let aggregable = if !htlc.offered { false } else { true };
@@ -1714,18 +1650,8 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 					}
 				}
 			}
-		} else if let Some((ref to_remote_rescue, ref local_key)) = self.to_remote_rescue {
-			for (idx, outp) in tx.output.iter().enumerate() {
-				if to_remote_rescue == &outp.script_pubkey {
-					spendable_outputs.push(SpendableOutputDescriptor::DynamicOutputP2WPKH {
-						outpoint: BitcoinOutPoint { txid: commitment_txid, vout: idx as u32 },
-						key: local_key.clone(),
-						output: outp.clone(),
-					});
-				}
-			}
 		}
-		(claimable_outpoints, (commitment_txid, watch_outputs), spendable_outputs)
+		(claimable_outpoints, (commitment_txid, watch_outputs))
 	}
 
 	/// Attempts to claim a remote HTLC-Success/HTLC-Timeout's outputs using the revocation key
@@ -1747,13 +1673,8 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 		let secret = if let Some(secret) = self.get_secret(commitment_number) { secret } else { return (Vec::new(), None); };
 		let per_commitment_key = ignore_error!(SecretKey::from_slice(&secret));
 		let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key);
-		let (revocation_pubkey, revocation_key) = match self.key_storage {
-			Storage::Local { ref keys, ref revocation_base_key, .. } => {
-				(ignore_error!(chan_utils::derive_public_revocation_key(&self.secp_ctx, &per_commitment_point, &keys.pubkeys().revocation_basepoint)),
-				ignore_error!(chan_utils::derive_private_revocation_key(&self.secp_ctx, &per_commitment_key, revocation_base_key)))
-			},
-			Storage::Watchtower { .. } => { unimplemented!() }
-		};
+		let revocation_pubkey = ignore_error!(chan_utils::derive_public_revocation_key(&self.secp_ctx, &per_commitment_point, &self.keys.pubkeys().revocation_basepoint));
+		let revocation_key = ignore_error!(chan_utils::derive_private_revocation_key(&self.secp_ctx, &per_commitment_key, &self.keys.revocation_base_key()));
 		let delayed_key = match self.their_delayed_payment_base_key {
 			None => return (Vec::new(), None),
 			Some(their_delayed_payment_base_key) => ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &per_commitment_point, &their_delayed_payment_base_key)),
@@ -1766,65 +1687,32 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 		(claimable_outpoints, Some((htlc_txid, tx.output.clone())))
 	}
 
-	fn broadcast_by_local_state(&self, local_tx: &LocalSignedTx, delayed_payment_base_key: &SecretKey) -> (Vec<Transaction>, Vec<TxOut>, Option<(Script, SecretKey, Script)>) {
-		let mut res = Vec::with_capacity(local_tx.htlc_outputs.len());
+	fn broadcast_by_local_state(&self, commitment_tx: &Transaction, local_tx: &LocalSignedTx) -> (Vec<ClaimRequest>, Vec<TxOut>, Option<(Script, SecretKey, Script)>) {
+		let mut claim_requests = Vec::with_capacity(local_tx.htlc_outputs.len());
 		let mut watch_outputs = Vec::with_capacity(local_tx.htlc_outputs.len());
 
 		let redeemscript = chan_utils::get_revokeable_redeemscript(&local_tx.revocation_key, self.their_to_self_delay.unwrap(), &local_tx.delayed_payment_key);
-		let broadcasted_local_revokable_script = if let Ok(local_delayedkey) = chan_utils::derive_private_key(&self.secp_ctx, &local_tx.per_commitment_point, delayed_payment_base_key) {
+		let broadcasted_local_revokable_script = if let Ok(local_delayedkey) = chan_utils::derive_private_key(&self.secp_ctx, &local_tx.per_commitment_point, self.keys.delayed_payment_base_key()) {
 			Some((redeemscript.to_v0_p2wsh(), local_delayedkey, redeemscript))
 		} else { None };
 
-		if let &Storage::Local { ref htlc_base_key, .. } = &self.key_storage {
-			for &(ref htlc, ref sigs, _) in local_tx.htlc_outputs.iter() {
-				if let Some(transaction_output_index) = htlc.transaction_output_index {
-					if let &Some(ref their_sig) = sigs {
-						if htlc.offered {
-							log_trace!(self, "Broadcasting HTLC-Timeout transaction against local commitment transactions");
-							let mut htlc_timeout_tx = chan_utils::build_htlc_transaction(&local_tx.txid, local_tx.feerate_per_kw, self.their_to_self_delay.unwrap(), htlc, &local_tx.delayed_payment_key, &local_tx.revocation_key);
-							let (our_sig, htlc_script) = match
-									chan_utils::sign_htlc_transaction(&mut htlc_timeout_tx, their_sig, &None, htlc, &local_tx.a_htlc_key, &local_tx.b_htlc_key, &local_tx.revocation_key, &local_tx.per_commitment_point, htlc_base_key, &self.secp_ctx) {
-								Ok(res) => res,
-								Err(_) => continue,
-							};
-
-							let mut per_input_material = HashMap::with_capacity(1);
-							per_input_material.insert(htlc_timeout_tx.input[0].previous_output, InputMaterial::LocalHTLC { witness_script: htlc_script, sigs: (*their_sig, our_sig), preimage: None, amount: htlc.amount_msat / 1000});
-							//TODO: with option_simplified_commitment track outpoint too
-							log_trace!(self, "Outpoint {}:{} is being being claimed", htlc_timeout_tx.input[0].previous_output.vout, htlc_timeout_tx.input[0].previous_output.txid);
-							res.push(htlc_timeout_tx);
-						} else {
-							if let Some(payment_preimage) = self.payment_preimages.get(&htlc.payment_hash) {
-								log_trace!(self, "Broadcasting HTLC-Success transaction against local commitment transactions");
-								let mut htlc_success_tx = chan_utils::build_htlc_transaction(&local_tx.txid, local_tx.feerate_per_kw, self.their_to_self_delay.unwrap(), htlc, &local_tx.delayed_payment_key, &local_tx.revocation_key);
-								let (our_sig, htlc_script) = match
-										chan_utils::sign_htlc_transaction(&mut htlc_success_tx, their_sig, &Some(*payment_preimage), htlc, &local_tx.a_htlc_key, &local_tx.b_htlc_key, &local_tx.revocation_key, &local_tx.per_commitment_point, htlc_base_key, &self.secp_ctx) {
-									Ok(res) => res,
-									Err(_) => continue,
-								};
-
-								let mut per_input_material = HashMap::with_capacity(1);
-								per_input_material.insert(htlc_success_tx.input[0].previous_output, InputMaterial::LocalHTLC { witness_script: htlc_script, sigs: (*their_sig, our_sig), preimage: Some(*payment_preimage), amount: htlc.amount_msat / 1000});
-								//TODO: with option_simplified_commitment track outpoint too
-								log_trace!(self, "Outpoint {}:{} is being being claimed", htlc_success_tx.input[0].previous_output.vout, htlc_success_tx.input[0].previous_output.txid);
-								res.push(htlc_success_tx);
-							}
-						}
-						watch_outputs.push(local_tx.tx.without_valid_witness().output[transaction_output_index as usize].clone());
-					} else { panic!("Should have sigs for non-dust local tx outputs!") }
-				}
+		for &(ref htlc, _, _) in local_tx.htlc_outputs.iter() {
+			if let Some(transaction_output_index) = htlc.transaction_output_index {
+				let preimage = if let Some(preimage) = self.payment_preimages.get(&htlc.payment_hash) { Some(*preimage) } else { None };
+				claim_requests.push(ClaimRequest { absolute_timelock: ::std::u32::MAX, aggregable: false, outpoint: BitcoinOutPoint { txid: local_tx.txid, vout: transaction_output_index as u32 }, witness_data: InputMaterial::LocalHTLC { preimage, amount: htlc.amount_msat / 1000 }});
+				watch_outputs.push(commitment_tx.output[transaction_output_index as usize].clone());
 			}
 		}
 
-		(res, watch_outputs, broadcasted_local_revokable_script)
+		(claim_requests, watch_outputs, broadcasted_local_revokable_script)
 	}
 
 	/// Attempts to claim any claimable HTLCs in a commitment transaction which was not (yet)
 	/// revoked using data in local_claimable_outpoints.
 	/// Should not be used if check_spend_revoked_transaction succeeds.
-	fn check_spend_local_transaction(&mut self, tx: &Transaction, height: u32) -> (Vec<Transaction>, (Sha256dHash, Vec<TxOut>)) {
+	fn check_spend_local_transaction(&mut self, tx: &Transaction, height: u32) -> (Vec<ClaimRequest>, (Sha256dHash, Vec<TxOut>)) {
 		let commitment_txid = tx.txid();
-		let mut local_txn = Vec::new();
+		let mut claim_requests = Vec::new();
 		let mut watch_outputs = Vec::new();
 
 		macro_rules! wait_threshold_conf {
@@ -1838,6 +1726,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 								OnchainEvent::HTLCUpdate { ref htlc_update } => {
 									return htlc_update.0 != $source
 								},
+								_ => true
 							}
 						});
 						e.push(OnchainEvent::HTLCUpdate { htlc_update: ($source, $payment_hash)});
@@ -1851,7 +1740,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 
 		macro_rules! append_onchain_update {
 			($updates: expr) => {
-				local_txn.append(&mut $updates.0);
+				claim_requests = $updates.0;
 				watch_outputs.append(&mut $updates.1);
 				self.broadcasted_local_revokable_script = $updates.2;
 			}
@@ -1860,52 +1749,20 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 		// HTLCs set may differ between last and previous local commitment txn, in case of one them hitting chain, ensure we cancel all HTLCs backward
 		let mut is_local_tx = false;
 
-		if let &mut Some(ref mut local_tx) = &mut self.current_local_signed_commitment_tx {
-			if local_tx.txid == commitment_txid {
-				match self.key_storage {
-					Storage::Local { ref funding_key, .. } => {
-						local_tx.tx.add_local_sig(funding_key, self.funding_redeemscript.as_ref().unwrap(), self.channel_value_satoshis.unwrap(), &self.secp_ctx);
-					},
-					_ => {},
-				}
-			}
-		}
 		if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
 			if local_tx.txid == commitment_txid {
 				is_local_tx = true;
 				log_trace!(self, "Got latest local commitment tx broadcast, searching for available HTLCs to claim");
-				assert!(local_tx.tx.has_local_sig());
-				match self.key_storage {
-					Storage::Local { ref delayed_payment_base_key, .. } => {
-						let mut res = self.broadcast_by_local_state(local_tx, delayed_payment_base_key);
-						append_onchain_update!(res);
-					},
-					Storage::Watchtower { .. } => { }
-				}
-			}
-		}
-		if let &mut Some(ref mut local_tx) = &mut self.prev_local_signed_commitment_tx {
-			if local_tx.txid == commitment_txid {
-				match self.key_storage {
-					Storage::Local { ref funding_key, .. } => {
-						local_tx.tx.add_local_sig(funding_key, self.funding_redeemscript.as_ref().unwrap(), self.channel_value_satoshis.unwrap(), &self.secp_ctx);
-					},
-					_ => {},
-				}
+				let mut res = self.broadcast_by_local_state(tx, local_tx);
+				append_onchain_update!(res);
 			}
 		}
 		if let &Some(ref local_tx) = &self.prev_local_signed_commitment_tx {
 			if local_tx.txid == commitment_txid {
 				is_local_tx = true;
 				log_trace!(self, "Got previous local commitment tx broadcast, searching for available HTLCs to claim");
-				assert!(local_tx.tx.has_local_sig());
-				match self.key_storage {
-					Storage::Local { ref delayed_payment_base_key, .. } => {
-						let mut res = self.broadcast_by_local_state(local_tx, delayed_payment_base_key);
-						append_onchain_update!(res);
-					},
-					Storage::Watchtower { .. } => { }
-				}
+				let mut res = self.broadcast_by_local_state(tx, local_tx);
+				append_onchain_update!(res);
 			}
 		}
 
@@ -1930,32 +1787,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 			}
 		}
 
-		(local_txn, (commitment_txid, watch_outputs))
-	}
-
-	/// Generate a spendable output event when closing_transaction get registered onchain.
-	fn check_spend_closing_transaction(&self, tx: &Transaction) -> Option<SpendableOutputDescriptor> {
-		if tx.input[0].sequence == 0xFFFFFFFF && !tx.input[0].witness.is_empty() && tx.input[0].witness.last().unwrap().len() == 71 {
-			match self.key_storage {
-				Storage::Local { ref shutdown_pubkey, .. } =>  {
-					let our_channel_close_key_hash = Hash160::hash(&shutdown_pubkey.serialize());
-					let shutdown_script = Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script();
-					for (idx, output) in tx.output.iter().enumerate() {
-						if shutdown_script == output.script_pubkey {
-							return Some(SpendableOutputDescriptor::StaticOutput {
-								outpoint: BitcoinOutPoint { txid: tx.txid(), vout: idx as u32 },
-								output: output.clone(),
-							});
-						}
-					}
-				}
-				Storage::Watchtower { .. } => {
-					//TODO: we need to ensure an offline client will generate the event when it
-					// comes back online after only the watchtower saw the transaction
-				}
-			}
-		}
-		None
+		(claim_requests, (commitment_txid, watch_outputs))
 	}
 
 	/// Used by ChannelManager deserialization to broadcast the latest local state if its copy of
@@ -1968,32 +1800,49 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 	/// out-of-band the other node operator to coordinate with him if option is available to you.
 	/// In any-case, choice is up to the user.
 	pub fn get_latest_local_commitment_txn(&mut self) -> Vec<Transaction> {
-		// TODO: We should likely move all of the logic in here into OnChainTxHandler and unify it
-		// to ensure add_local_sig is only ever called once no matter what. This likely includes
-		// tracking state and panic!()ing if we get an update after force-closure/local-tx signing.
 		log_trace!(self, "Getting signed latest local commitment transaction!");
-		if let &mut Some(ref mut local_tx) = &mut self.current_local_signed_commitment_tx {
-			match self.key_storage {
-				Storage::Local { ref funding_key, .. } => {
-					local_tx.tx.add_local_sig(funding_key, self.funding_redeemscript.as_ref().unwrap(), self.channel_value_satoshis.unwrap(), &self.secp_ctx);
-				},
-				_ => {},
+		if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_local_tx(self.channel_value_satoshis.unwrap()) {
+			let txid = commitment_tx.txid();
+			let mut res = vec![commitment_tx];
+			if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
+				for htlc in local_tx.htlc_outputs.iter() {
+					if let Some(htlc_index) = htlc.0.transaction_output_index {
+						let preimage = if let Some(preimage) = self.payment_preimages.get(&htlc.0.payment_hash) { Some(*preimage) } else { None };
+						if let Some(htlc_tx) = self.onchain_tx_handler.get_fully_signed_htlc_tx(txid, htlc_index, preimage) {
+							res.push(htlc_tx);
+						}
+					}
+				}
+				// We throw away the generated waiting_first_conf data as we aren't (yet) confirmed and we don't actually know what the caller wants to do.
+				// The data will be re-generated and tracked in check_spend_local_transaction if we get a confirmation.
 			}
+			return res
 		}
-		if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
-			let mut res = vec![local_tx.tx.with_valid_witness().clone()];
-			match self.key_storage {
-				Storage::Local { ref delayed_payment_base_key, .. } => {
-					res.append(&mut self.broadcast_by_local_state(local_tx, delayed_payment_base_key).0);
-					// We throw away the generated waiting_first_conf data as we aren't (yet) confirmed and we don't actually know what the caller wants to do.
-					// The data will be re-generated and tracked in check_spend_local_transaction if we get a confirmation.
-				},
-				_ => panic!("Can only broadcast by local channelmonitor"),
-			};
-			res
-		} else {
-			Vec::new()
+		Vec::new()
+	}
+
+	/// Unsafe test-only version of get_latest_local_commitment_txn used by our test framework
+	/// to bypass LocalCommitmentTransaction state update lockdown after signature and generate
+	/// revoked commitment transaction.
+	#[cfg(test)]
+	pub fn unsafe_get_latest_local_commitment_txn(&mut self) -> Vec<Transaction> {
+		log_trace!(self, "Getting signed copy of latest local commitment transaction!");
+		if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_copy_local_tx(self.channel_value_satoshis.unwrap()) {
+			let txid = commitment_tx.txid();
+			let mut res = vec![commitment_tx];
+			if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
+				for htlc in local_tx.htlc_outputs.iter() {
+					if let Some(htlc_index) = htlc.0.transaction_output_index {
+						let preimage = if let Some(preimage) = self.payment_preimages.get(&htlc.0.payment_hash) { Some(*preimage) } else { None };
+						if let Some(htlc_tx) = self.onchain_tx_handler.get_fully_signed_htlc_tx(txid, htlc_index, preimage) {
+							res.push(htlc_tx);
+						}
+					}
+				}
+			}
+			return res
 		}
+		Vec::new()
 	}
 
 	/// Called by SimpleManyChannelMonitor::block_connected, which implements
@@ -2016,7 +1865,6 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 
 		log_trace!(self, "Block {} at height {} connected with {} txn matched", block_hash, height, txn_matched.len());
 		let mut watch_outputs = Vec::new();
-		let mut spendable_outputs = Vec::new();
 		let mut claimable_outpoints = Vec::new();
 		for tx in txn_matched {
 			if tx.input.len() == 1 {
@@ -2025,38 +1873,22 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 				// which is an easy way to filter out any potential non-matching txn for lazy
 				// filters.
 				let prevout = &tx.input[0].previous_output;
-				let funding_txo = match self.key_storage {
-					Storage::Local { ref funding_info, .. } => {
-						funding_info.clone()
-					}
-					Storage::Watchtower { .. } => {
-						unimplemented!();
-					}
-				};
+				let funding_txo = self.funding_info.clone();
 				if funding_txo.is_none() || (prevout.txid == funding_txo.as_ref().unwrap().0.txid && prevout.vout == funding_txo.as_ref().unwrap().0.index as u32) {
 					if (tx.input[0].sequence >> 8*3) as u8 == 0x80 && (tx.lock_time >> 8*3) as u8 == 0x20 {
-						let (mut new_outpoints, new_outputs, mut spendable_output) = self.check_spend_remote_transaction(&tx, height);
-						spendable_outputs.append(&mut spendable_output);
+						let (mut new_outpoints, new_outputs) = self.check_spend_remote_transaction(&tx, height);
 						if !new_outputs.1.is_empty() {
 							watch_outputs.push(new_outputs);
 						}
 						if new_outpoints.is_empty() {
-							let (local_txn, new_outputs) = self.check_spend_local_transaction(&tx, height);
-							for tx in local_txn.iter() {
-								log_trace!(self, "Broadcast onchain {}", log_tx!(tx));
-								broadcaster.broadcast_transaction(tx);
-							}
+							let (mut new_outpoints, new_outputs) = self.check_spend_local_transaction(&tx, height);
 							if !new_outputs.1.is_empty() {
 								watch_outputs.push(new_outputs);
 							}
+							claimable_outpoints.append(&mut new_outpoints);
 						}
 						claimable_outpoints.append(&mut new_outpoints);
 					}
-					if !funding_txo.is_none() && claimable_outpoints.is_empty() {
-						if let Some(spendable_output) = self.check_spend_closing_transaction(&tx) {
-							spendable_outputs.push(spendable_output);
-						}
-					}
 				} else {
 					if let Some(&(commitment_number, _)) = self.remote_commitment_txn_on_chain.get(&prevout.txid) {
 						let (mut new_outpoints, new_outputs_option) = self.check_spend_remote_htlc(&tx, commitment_number, height);
@@ -2072,39 +1904,22 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 			// we call is_resolving_htlc_output here outside of the tx.input.len() == 1 check.
 			self.is_resolving_htlc_output(&tx, height);
 
-			if let Some(spendable_output) = self.is_paying_spendable_output(&tx) {
-				spendable_outputs.push(spendable_output);
-			}
+			self.is_paying_spendable_output(&tx, height);
 		}
 		let should_broadcast = if let Some(_) = self.current_local_signed_commitment_tx {
 			self.would_broadcast_at_height(height)
 		} else { false };
-		if let Some(ref mut cur_local_tx) = self.current_local_signed_commitment_tx {
-			if should_broadcast {
-				match self.key_storage {
-					Storage::Local { ref funding_key, .. } => {
-						cur_local_tx.tx.add_local_sig(funding_key, self.funding_redeemscript.as_ref().unwrap(), self.channel_value_satoshis.unwrap(), &self.secp_ctx);
-					},
-					_ => {}
-				}
-			}
+		if should_broadcast {
+			claimable_outpoints.push(ClaimRequest { absolute_timelock: height, aggregable: false, outpoint: BitcoinOutPoint { txid: self.funding_info.as_ref().unwrap().0.txid.clone(), vout: self.funding_info.as_ref().unwrap().0.index as u32 }, witness_data: InputMaterial::Funding { channel_value: self.channel_value_satoshis.unwrap() }});
 		}
 		if let Some(ref cur_local_tx) = self.current_local_signed_commitment_tx {
 			if should_broadcast {
-				log_trace!(self, "Broadcast onchain {}", log_tx!(cur_local_tx.tx.with_valid_witness()));
-				broadcaster.broadcast_transaction(&cur_local_tx.tx.with_valid_witness());
-				match self.key_storage {
-					Storage::Local { ref delayed_payment_base_key, .. } => {
-						let (txs, new_outputs, _) = self.broadcast_by_local_state(&cur_local_tx, delayed_payment_base_key);
-						if !new_outputs.is_empty() {
-							watch_outputs.push((cur_local_tx.txid.clone(), new_outputs));
-						}
-						for tx in txs {
-							log_trace!(self, "Broadcast onchain {}", log_tx!(tx));
-							broadcaster.broadcast_transaction(&tx);
-						}
-					},
-					Storage::Watchtower { .. } => { },
+				if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_local_tx(self.channel_value_satoshis.unwrap()) {
+					let (mut new_outpoints, new_outputs, _) = self.broadcast_by_local_state(&commitment_tx, cur_local_tx);
+					if !new_outputs.is_empty() {
+						watch_outputs.push((cur_local_tx.txid.clone(), new_outputs));
+					}
+					claimable_outpoints.append(&mut new_outpoints);
 				}
 			}
 		}
@@ -2119,6 +1934,12 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 							source: htlc_update.0,
 						});
 					},
+					OnchainEvent::MaturingOutput { descriptor } => {
+						log_trace!(self, "Descriptor {} has got enough confirmations to be passed upstream", log_spendable!(descriptor));
+						self.pending_events.push(events::Event::SpendableOutputs {
+							outputs: vec![descriptor]
+						});
+					}
 				}
 			}
 		}
@@ -2129,16 +1950,6 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 			self.outputs_to_watch.insert(txid.clone(), output_scripts.iter().map(|o| o.script_pubkey.clone()).collect());
 		}
 
-		for spend in spendable_outputs.iter() {
-			log_trace!(self, "Announcing spendable output to user: {}", log_spendable!(spend));
-		}
-
-		if spendable_outputs.len() > 0 {
-			self.pending_events.push(events::Event::SpendableOutputs {
-				outputs: spendable_outputs,
-			});
-		}
-
 		watch_outputs
 	}
 
@@ -2150,6 +1961,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 		if let Some(_) = self.onchain_events_waiting_threshold_conf.remove(&(height + ANTI_REORG_DELAY - 1)) {
 			//We may discard:
 			//- htlc update there as failure-trigger tx (revoked commitment tx, non-revoked commitment tx, HTLC-timeout tx) has been disconnected
+			//- maturing spendable output has transaction paying us has been disconnected
 		}
 
 		self.onchain_tx_handler.block_disconnected(height, broadcaster, fee_estimator);
@@ -2208,16 +2020,14 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 			scan_commitment!(cur_local_tx.htlc_outputs.iter().map(|&(ref a, _, _)| a), true);
 		}
 
-		if let Storage::Local { ref current_remote_commitment_txid, ref prev_remote_commitment_txid, .. } = self.key_storage {
-			if let &Some(ref txid) = current_remote_commitment_txid {
-				if let Some(ref htlc_outputs) = self.remote_claimable_outpoints.get(txid) {
-					scan_commitment!(htlc_outputs.iter().map(|&(ref a, _)| a), false);
-				}
+		if let Some(ref txid) = self.current_remote_commitment_txid {
+			if let Some(ref htlc_outputs) = self.remote_claimable_outpoints.get(txid) {
+				scan_commitment!(htlc_outputs.iter().map(|&(ref a, _)| a), false);
 			}
-			if let &Some(ref txid) = prev_remote_commitment_txid {
-				if let Some(ref htlc_outputs) = self.remote_claimable_outpoints.get(txid) {
-					scan_commitment!(htlc_outputs.iter().map(|&(ref a, _)| a), false);
-				}
+		}
+		if let Some(ref txid) = self.prev_remote_commitment_txid {
+			if let Some(ref htlc_outputs) = self.remote_claimable_outpoints.get(txid) {
+				scan_commitment!(htlc_outputs.iter().map(|&(ref a, _)| a), false);
 			}
 		}
 
@@ -2258,7 +2068,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 
 			macro_rules! check_htlc_valid_remote {
 				($remote_txid: expr, $htlc_output: expr) => {
-					if let &Some(txid) = $remote_txid {
+					if let Some(txid) = $remote_txid {
 						for &(ref pending_htlc, ref pending_source) in self.remote_claimable_outpoints.get(&txid).unwrap() {
 							if pending_htlc.payment_hash == $htlc_output.payment_hash && pending_htlc.amount_msat == $htlc_output.amount_msat {
 								if let &Some(ref source) = pending_source {
@@ -2285,13 +2095,9 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 								// resolve the source HTLC with the original sender.
 								payment_data = Some(((*source).clone(), htlc_output.payment_hash));
 							} else if !$local_tx {
-								if let Storage::Local { ref current_remote_commitment_txid, .. } = self.key_storage {
-									check_htlc_valid_remote!(current_remote_commitment_txid, htlc_output);
-								}
+									check_htlc_valid_remote!(self.current_remote_commitment_txid, htlc_output);
 								if payment_data.is_none() {
-									if let Storage::Local { ref prev_remote_commitment_txid, .. } = self.key_storage {
-										check_htlc_valid_remote!(prev_remote_commitment_txid, htlc_output);
-									}
+									check_htlc_valid_remote!(self.prev_remote_commitment_txid, htlc_output);
 								}
 							}
 							if payment_data.is_none() {
@@ -2352,6 +2158,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 									OnchainEvent::HTLCUpdate { ref htlc_update } => {
 										return htlc_update.0 != source
 									},
+									_ => true
 								}
 							});
 							e.push(OnchainEvent::HTLCUpdate { htlc_update: (source, payment_hash)});
@@ -2366,26 +2173,54 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
 	}
 
 	/// Check if any transaction broadcasted is paying fund back to some address we can assume to own
-	fn is_paying_spendable_output(&self, tx: &Transaction) -> Option<SpendableOutputDescriptor> {
+	fn is_paying_spendable_output(&mut self, tx: &Transaction, height: u32) {
+		let mut spendable_output = None;
 		for (i, outp) in tx.output.iter().enumerate() { // There is max one spendable output for any channel tx, including ones generated by us
 			if outp.script_pubkey == self.destination_script {
-				return Some(SpendableOutputDescriptor::StaticOutput {
+				spendable_output =  Some(SpendableOutputDescriptor::StaticOutput {
 					outpoint: BitcoinOutPoint { txid: tx.txid(), vout: i as u32 },
 					output: outp.clone(),
 				});
+				break;
 			} else if let Some(ref broadcasted_local_revokable_script) = self.broadcasted_local_revokable_script {
 				if broadcasted_local_revokable_script.0 == outp.script_pubkey {
-					return Some(SpendableOutputDescriptor::DynamicOutputP2WSH {
+					spendable_output =  Some(SpendableOutputDescriptor::DynamicOutputP2WSH {
 						outpoint: BitcoinOutPoint { txid: tx.txid(), vout: i as u32 },
 						key: broadcasted_local_revokable_script.1,
 						witness_script: broadcasted_local_revokable_script.2.clone(),
 						to_self_delay: self.their_to_self_delay.unwrap(),
 						output: outp.clone(),
 					});
+					break;
+				}
+			} else if let Some(ref broadcasted_remote_payment_script) = self.broadcasted_remote_payment_script {
+				if broadcasted_remote_payment_script.0 == outp.script_pubkey {
+					spendable_output = Some(SpendableOutputDescriptor::DynamicOutputP2WPKH {
+						outpoint: BitcoinOutPoint { txid: tx.txid(), vout: i as u32 },
+						key: broadcasted_remote_payment_script.1,
+						output: outp.clone(),
+					});
+					break;
+				}
+			} else if outp.script_pubkey == self.shutdown_script {
+				spendable_output = Some(SpendableOutputDescriptor::StaticOutput {
+					outpoint: BitcoinOutPoint { txid: tx.txid(), vout: i as u32 },
+					output: outp.clone(),
+				});
+			}
+		}
+		if let Some(spendable_output) = spendable_output {
+			log_trace!(self, "Maturing {} until {}", log_spendable!(spendable_output), height + ANTI_REORG_DELAY - 1);
+			match self.onchain_events_waiting_threshold_conf.entry(height + ANTI_REORG_DELAY - 1) {
+				hash_map::Entry::Occupied(mut entry) => {
+					let e = entry.get_mut();
+					e.push(OnchainEvent::MaturingOutput { descriptor: spendable_output });
+				}
+				hash_map::Entry::Vacant(entry) => {
+					entry.insert(vec![OnchainEvent::MaturingOutput { descriptor: spendable_output }]);
 				}
 			}
 		}
-		None
 	}
 }
 
@@ -2422,40 +2257,27 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
 			1 => { None },
 			_ => return Err(DecodeError::InvalidValue),
 		};
-
-		let key_storage = match <u8 as Readable>::read(reader)? {
+		let broadcasted_remote_payment_script = match <u8 as Readable>::read(reader)? {
 			0 => {
-				let keys = Readable::read(reader)?;
-				let funding_key = Readable::read(reader)?;
-				let revocation_base_key = Readable::read(reader)?;
-				let htlc_base_key = Readable::read(reader)?;
-				let delayed_payment_base_key = Readable::read(reader)?;
-				let payment_base_key = Readable::read(reader)?;
-				let shutdown_pubkey = Readable::read(reader)?;
-				// Technically this can fail and serialize fail a round-trip, but only for serialization of
-				// barely-init'd ChannelMonitors that we can't do anything with.
-				let outpoint = OutPoint {
-					txid: Readable::read(reader)?,
-					index: Readable::read(reader)?,
-				};
-				let funding_info = Some((outpoint, Readable::read(reader)?));
-				let current_remote_commitment_txid = Readable::read(reader)?;
-				let prev_remote_commitment_txid = Readable::read(reader)?;
-				Storage::Local {
-					keys,
-					funding_key,
-					revocation_base_key,
-					htlc_base_key,
-					delayed_payment_base_key,
-					payment_base_key,
-					shutdown_pubkey,
-					funding_info,
-					current_remote_commitment_txid,
-					prev_remote_commitment_txid,
-				}
+				let payment_address = Readable::read(reader)?;
+				let payment_key = Readable::read(reader)?;
+				Some((payment_address, payment_key))
 			},
+			1 => { None },
 			_ => return Err(DecodeError::InvalidValue),
 		};
+		let shutdown_script = Readable::read(reader)?;
+
+		let keys = Readable::read(reader)?;
+		// Technically this can fail and serialize fail a round-trip, but only for serialization of
+		// barely-init'd ChannelMonitors that we can't do anything with.
+		let outpoint = OutPoint {
+			txid: Readable::read(reader)?,
+			index: Readable::read(reader)?,
+		};
+		let funding_info = Some((outpoint, Readable::read(reader)?));
+		let current_remote_commitment_txid = Readable::read(reader)?;
+		let prev_remote_commitment_txid = Readable::read(reader)?;
 
 		let their_htlc_base_key = Some(Readable::read(reader)?);
 		let their_delayed_payment_base_key = Some(Readable::read(reader)?);
@@ -2540,7 +2362,7 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
 		macro_rules! read_local_tx {
 			() => {
 				{
-					let tx = <LocalCommitmentTransaction as Readable>::read(reader)?;
+					let txid = Readable::read(reader)?;
 					let revocation_key = Readable::read(reader)?;
 					let a_htlc_key = Readable::read(reader)?;
 					let b_htlc_key = Readable::read(reader)?;
@@ -2561,8 +2383,8 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
 					}
 
 					LocalSignedTx {
-						txid: tx.txid(),
-						tx, revocation_key, a_htlc_key, b_htlc_key, delayed_payment_key, per_commitment_point, feerate_per_kw,
+						txid,
+						revocation_key, a_htlc_key, b_htlc_key, delayed_payment_key, per_commitment_point, feerate_per_kw,
 						htlc_outputs: htlcs
 					}
 				}
@@ -2586,6 +2408,7 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
 		};
 
 		let current_remote_commitment_number = <U48 as Readable>::read(reader)?.0;
+		let current_local_commitment_number = <U48 as Readable>::read(reader)?.0;
 
 		let payment_preimages_len: u64 = Readable::read(reader)?;
 		let mut payment_preimages = HashMap::with_capacity(cmp::min(payment_preimages_len as usize, MAX_ALLOC_SIZE / 32));
@@ -2612,15 +2435,6 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
 		}
 
 		let last_block_hash: Sha256dHash = Readable::read(reader)?;
-		let to_remote_rescue = match <u8 as Readable>::read(reader)? {
-			0 => None,
-			1 => {
-				let to_remote_script = Readable::read(reader)?;
-				let local_key = Readable::read(reader)?;
-				Some((to_remote_script, local_key))
-			}
-			_ => return Err(DecodeError::InvalidValue),
-		};
 
 		let waiting_threshold_conf_len: u64 = Readable::read(reader)?;
 		let mut onchain_events_waiting_threshold_conf = HashMap::with_capacity(cmp::min(waiting_threshold_conf_len as usize, MAX_ALLOC_SIZE / 128));
@@ -2637,6 +2451,12 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
 							htlc_update: (htlc_source, hash)
 						}
 					},
+					1 => {
+						let descriptor = Readable::read(reader)?;
+						OnchainEvent::MaturingOutput {
+							descriptor
+						}
+					},
 					_ => return Err(DecodeError::InvalidValue),
 				};
 				events.push(ev);
@@ -2659,14 +2479,22 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
 		}
 		let onchain_tx_handler = ReadableArgs::read(reader, logger.clone())?;
 
+		let lockdown_from_offchain = Readable::read(reader)?;
+
 		Ok((last_block_hash.clone(), ChannelMonitor {
 			latest_update_id,
 			commitment_transaction_number_obscure_factor,
 
 			destination_script,
 			broadcasted_local_revokable_script,
+			broadcasted_remote_payment_script,
+			shutdown_script,
+
+			keys,
+			funding_info,
+			current_remote_commitment_txid,
+			prev_remote_commitment_txid,
 
-			key_storage,
 			their_htlc_base_key,
 			their_delayed_payment_base_key,
 			funding_redeemscript,
@@ -2684,18 +2512,19 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
 			prev_local_signed_commitment_tx,
 			current_local_signed_commitment_tx,
 			current_remote_commitment_number,
+			current_local_commitment_number,
 
 			payment_preimages,
 			pending_htlcs_updated,
 			pending_events,
 
-			to_remote_rescue,
-
 			onchain_events_waiting_threshold_conf,
 			outputs_to_watch,
 
 			onchain_tx_handler,
 
+			lockdown_from_offchain,
+
 			last_block_hash,
 			secp_ctx: Secp256k1::new(),
 			logger,
@@ -2926,7 +2755,7 @@ mod tests {
 		for (idx, inp) in claim_tx.input.iter_mut().zip(inputs_des.iter()).enumerate() {
 			sign_input!(sighash_parts, inp.0, idx as u32, 0, inp.1, sum_actual_sigs);
 		}
-		assert_eq!(base_weight + OnchainTxHandler::get_witnesses_weight(&inputs_des[..]),  claim_tx.get_weight() + /* max_length_sig */ (73 * inputs_des.len() - sum_actual_sigs));
+		assert_eq!(base_weight + OnchainTxHandler::<InMemoryChannelKeys>::get_witnesses_weight(&inputs_des[..]),  claim_tx.get_weight() + /* max_length_sig */ (73 * inputs_des.len() - sum_actual_sigs));
 
 		// Claim tx with 1 offered HTLCs, 3 received HTLCs
 		claim_tx.input.clear();
@@ -2948,7 +2777,7 @@ mod tests {
 		for (idx, inp) in claim_tx.input.iter_mut().zip(inputs_des.iter()).enumerate() {
 			sign_input!(sighash_parts, inp.0, idx as u32, 0, inp.1, sum_actual_sigs);
 		}
-		assert_eq!(base_weight + OnchainTxHandler::get_witnesses_weight(&inputs_des[..]),  claim_tx.get_weight() + /* max_length_sig */ (73 * inputs_des.len() - sum_actual_sigs));
+		assert_eq!(base_weight + OnchainTxHandler::<InMemoryChannelKeys>::get_witnesses_weight(&inputs_des[..]),  claim_tx.get_weight() + /* max_length_sig */ (73 * inputs_des.len() - sum_actual_sigs));
 
 		// Justice tx with 1 revoked HTLC-Success tx output
 		claim_tx.input.clear();
@@ -2968,7 +2797,7 @@ mod tests {
 		for (idx, inp) in claim_tx.input.iter_mut().zip(inputs_des.iter()).enumerate() {
 			sign_input!(sighash_parts, inp.0, idx as u32, 0, inp.1, sum_actual_sigs);
 		}
-		assert_eq!(base_weight + OnchainTxHandler::get_witnesses_weight(&inputs_des[..]), claim_tx.get_weight() + /* max_length_isg */ (73 * inputs_des.len() - sum_actual_sigs));
+		assert_eq!(base_weight + OnchainTxHandler::<InMemoryChannelKeys>::get_witnesses_weight(&inputs_des[..]), claim_tx.get_weight() + /* max_length_isg */ (73 * inputs_des.len() - sum_actual_sigs));
 	}
 
 	// Further testing is done in the ChannelManager integration tests.