Create simple ChannelMonitor-specific Err type
[rust-lightning] / src / ln / channelmonitor.rs
index 5adfe926ce278f8d7c9858f00c13823354340714..d50c73f6dcd5de61da0b82093188e722c1f39460 100644 (file)
 use bitcoin::blockdata::block::BlockHeader;
 use bitcoin::blockdata::transaction::{TxIn,TxOut,SigHashType,Transaction};
 use bitcoin::blockdata::transaction::OutPoint as BitcoinOutPoint;
-use bitcoin::blockdata::script::Script;
-use bitcoin::network::serialize;
-use bitcoin::util::hash::Sha256dHash;
+use bitcoin::blockdata::script::{Script, Builder};
+use bitcoin::blockdata::opcodes;
+use bitcoin::consensus::encode::{self, Decodable, Encodable};
+use bitcoin::util::hash::{Hash160, BitcoinHash,Sha256dHash};
 use bitcoin::util::bip143;
 
 use crypto::digest::Digest;
@@ -25,13 +26,14 @@ use secp256k1::{Secp256k1,Message,Signature};
 use secp256k1::key::{SecretKey,PublicKey};
 use secp256k1;
 
-use ln::msgs::{DecodeError, HandleError};
+use ln::msgs::DecodeError;
 use ln::chan_utils;
 use ln::chan_utils::HTLCOutputInCommitment;
 use chain::chaininterface::{ChainListener, ChainWatchInterface, BroadcasterInterface};
 use chain::transaction::OutPoint;
 use chain::keysinterface::SpendableOutputDescriptor;
-use util::ser::{Readable, Writer};
+use util::logger::Logger;
+use util::ser::{ReadableArgs, Readable, Writer, Writeable, WriterWriteAdaptor, U48};
 use util::sha2::Sha256;
 use util::{byte_utils, events};
 
@@ -72,6 +74,14 @@ pub enum ChannelMonitorUpdateErr {
        PermanentFailure,
 }
 
+/// General Err type for ChannelMonitor actions. Generally, this implies that the data provided is
+/// inconsistent with the ChannelMonitor being called. eg for ChannelMonitor::insert_combine this
+/// means you tried to merge two monitors for different channels or for a channel which was
+/// restored from a backup and then generated new commitment updates.
+/// Contains a human-readable error message.
+#[derive(Debug)]
+pub struct MonitorUpdateError(pub &'static str);
+
 /// Simple trait indicating ability to track a set of ChannelMonitors and multiplex events between
 /// them. Generally should be implemented by keeping a local SimpleManyChannelMonitor and passing
 /// events to it, while also taking any add_update_monitor events and passing them to some remote
@@ -109,15 +119,17 @@ pub struct SimpleManyChannelMonitor<Key> {
        chain_monitor: Arc<ChainWatchInterface>,
        broadcaster: Arc<BroadcasterInterface>,
        pending_events: Mutex<Vec<events::Event>>,
+       logger: Arc<Logger>,
 }
 
 impl<Key : Send + cmp::Eq + hash::Hash> ChainListener for SimpleManyChannelMonitor<Key> {
-       fn block_connected(&self, _header: &BlockHeader, height: u32, txn_matched: &[&Transaction], _indexes_of_txn_matched: &[u32]) {
+       fn block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], _indexes_of_txn_matched: &[u32]) {
+               let block_hash = header.bitcoin_hash();
                let mut new_events: Vec<events::Event> = Vec::with_capacity(0);
                {
-                       let monitors = self.monitors.lock().unwrap();
-                       for monitor in monitors.values() {
-                               let (txn_outputs, spendable_outputs) = monitor.block_connected(txn_matched, height, &*self.broadcaster);
+                       let mut monitors = self.monitors.lock().unwrap();
+                       for monitor in monitors.values_mut() {
+                               let (txn_outputs, spendable_outputs) = monitor.block_connected(txn_matched, height, &block_hash, &*self.broadcaster);
                                if spendable_outputs.len() > 0 {
                                        new_events.push(events::Event::SpendableOutputs {
                                                outputs: spendable_outputs,
@@ -140,12 +152,13 @@ impl<Key : Send + cmp::Eq + hash::Hash> ChainListener for SimpleManyChannelMonit
 impl<Key : Send + cmp::Eq + hash::Hash + 'static> SimpleManyChannelMonitor<Key> {
        /// Creates a new object which can be used to monitor several channels given the chain
        /// interface with which to register to receive notifications.
-       pub fn new(chain_monitor: Arc<ChainWatchInterface>, broadcaster: Arc<BroadcasterInterface>) -> Arc<SimpleManyChannelMonitor<Key>> {
+       pub fn new(chain_monitor: Arc<ChainWatchInterface>, broadcaster: Arc<BroadcasterInterface>, logger: Arc<Logger>) -> Arc<SimpleManyChannelMonitor<Key>> {
                let res = Arc::new(SimpleManyChannelMonitor {
                        monitors: Mutex::new(HashMap::new()),
                        chain_monitor,
                        broadcaster,
                        pending_events: Mutex::new(Vec::new()),
+                       logger,
                });
                let weak_res = Arc::downgrade(&res);
                res.chain_monitor.register_listener(weak_res);
@@ -153,15 +166,22 @@ impl<Key : Send + cmp::Eq + hash::Hash + 'static> SimpleManyChannelMonitor<Key>
        }
 
        /// Adds or udpates the monitor which monitors the channel referred to by the given key.
-       pub fn add_update_monitor_by_key(&self, key: Key, monitor: ChannelMonitor) -> Result<(), HandleError> {
+       pub fn add_update_monitor_by_key(&self, key: Key, monitor: ChannelMonitor) -> Result<(), MonitorUpdateError> {
                let mut monitors = self.monitors.lock().unwrap();
                match monitors.get_mut(&key) {
-                       Some(orig_monitor) => return orig_monitor.insert_combine(monitor),
+                       Some(orig_monitor) => {
+                               log_trace!(self, "Updating Channel Monitor for channel {}", log_funding_option!(monitor.funding_txo));
+                               return orig_monitor.insert_combine(monitor);
+                       },
                        None => {}
                };
                match &monitor.funding_txo {
-                       &None => self.chain_monitor.watch_all_txn(),
+                       &None => {
+                               log_trace!(self, "Got new Channel Monitor for no-funding-set channel (monitoring all txn!)");
+                               self.chain_monitor.watch_all_txn()
+                       },
                        &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);
                        },
@@ -208,6 +228,8 @@ enum KeyStorage {
                revocation_base_key: SecretKey,
                htlc_base_key: SecretKey,
                delayed_payment_base_key: SecretKey,
+               payment_base_key: SecretKey,
+               shutdown_pubkey: PublicKey,
                prev_latest_per_commitment_point: Option<PublicKey>,
                latest_per_commitment_point: Option<PublicKey>,
        },
@@ -239,6 +261,7 @@ const MIN_SERIALIZATION_VERSION: u8 = 1;
 ///
 /// You MUST ensure that no ChannelMonitors for a given channel anywhere contain out-of-date
 /// information and are actively monitoring the chain.
+#[derive(Clone)]
 pub struct ChannelMonitor {
        funding_txo: Option<(OutPoint, Script)>,
        commitment_transaction_number_obscure_factor: u64,
@@ -259,7 +282,7 @@ pub struct ChannelMonitor {
        /// spending. Thus, in order to claim them via revocation key, we track all the remote
        /// commitment transactions which we find on-chain, mapping them to the commitment number which
        /// can be used to derive the revocation key and claim the transactions.
-       remote_commitment_txn_on_chain: Mutex<HashMap<Sha256dHash, u64>>,
+       remote_commitment_txn_on_chain: HashMap<Sha256dHash, (u64, Vec<Script>)>,
        /// Cache used to make pruning of payment_preimages faster.
        /// Maps payment_hash values to commitment numbers for remote transactions for non-revoked
        /// remote transactions (ie should remain pretty small).
@@ -273,39 +296,22 @@ pub struct ChannelMonitor {
        prev_local_signed_commitment_tx: Option<LocalSignedTx>,
        current_local_signed_commitment_tx: Option<LocalSignedTx>,
 
+       // Used just for ChannelManager to make sure it has the latest channel data during
+       // deserialization
+       current_remote_commitment_number: u64,
+
        payment_preimages: HashMap<[u8; 32], [u8; 32]>,
 
        destination_script: Script,
-       secp_ctx: Secp256k1<secp256k1::All>, //TODO: dedup this a bit...
-}
-impl Clone for ChannelMonitor {
-       fn clone(&self) -> Self {
-               ChannelMonitor {
-                       funding_txo: self.funding_txo.clone(),
-                       commitment_transaction_number_obscure_factor: self.commitment_transaction_number_obscure_factor.clone(),
-
-                       key_storage: self.key_storage.clone(),
-                       their_htlc_base_key: self.their_htlc_base_key.clone(),
-                       their_delayed_payment_base_key: self.their_delayed_payment_base_key.clone(),
-                       their_cur_revocation_points: self.their_cur_revocation_points.clone(),
 
-                       our_to_self_delay: self.our_to_self_delay,
-                       their_to_self_delay: self.their_to_self_delay,
-
-                       old_secrets: self.old_secrets.clone(),
-                       remote_claimable_outpoints: self.remote_claimable_outpoints.clone(),
-                       remote_commitment_txn_on_chain: Mutex::new((*self.remote_commitment_txn_on_chain.lock().unwrap()).clone()),
-                       remote_hash_commitment_number: self.remote_hash_commitment_number.clone(),
-
-                       prev_local_signed_commitment_tx: self.prev_local_signed_commitment_tx.clone(),
-                       current_local_signed_commitment_tx: self.current_local_signed_commitment_tx.clone(),
-
-                       payment_preimages: self.payment_preimages.clone(),
-
-                       destination_script: self.destination_script.clone(),
-                       secp_ctx: self.secp_ctx.clone(),
-               }
-       }
+       // 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.
+       // (we do *not*, however, update them in insert_combine to ensure any local user copies keep
+       // their last_block_hash from its state and not based on updated copies that didn't run through
+       // the full block_connected).
+       pub(crate) last_block_hash: Sha256dHash,
+       secp_ctx: Secp256k1<secp256k1::All>, //TODO: dedup this a bit...
+       logger: Arc<Logger>,
 }
 
 #[cfg(any(test, feature = "fuzztarget"))]
@@ -322,8 +328,10 @@ impl PartialEq for ChannelMonitor {
                        self.our_to_self_delay != other.our_to_self_delay ||
                        self.their_to_self_delay != other.their_to_self_delay ||
                        self.remote_claimable_outpoints != other.remote_claimable_outpoints ||
+                       self.remote_commitment_txn_on_chain != other.remote_commitment_txn_on_chain ||
                        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_signed_commitment_tx != other.current_local_signed_commitment_tx ||
                        self.payment_preimages != other.payment_preimages ||
                        self.destination_script != other.destination_script
@@ -335,15 +343,13 @@ impl PartialEq for ChannelMonitor {
                                        return false
                                }
                        }
-                       let us = self.remote_commitment_txn_on_chain.lock().unwrap();
-                       let them = other.remote_commitment_txn_on_chain.lock().unwrap();
-                       *us == *them
+                       true
                }
        }
 }
 
 impl ChannelMonitor {
-       pub(super) fn new(revocation_base_key: &SecretKey, delayed_payment_base_key: &SecretKey, htlc_base_key: &SecretKey, our_to_self_delay: u16, destination_script: Script) -> ChannelMonitor {
+       pub(super) fn new(revocation_base_key: &SecretKey, delayed_payment_base_key: &SecretKey, htlc_base_key: &SecretKey, payment_base_key: &SecretKey, shutdown_pubkey: &PublicKey, our_to_self_delay: u16, destination_script: Script, logger: Arc<Logger>) -> ChannelMonitor {
                ChannelMonitor {
                        funding_txo: None,
                        commitment_transaction_number_obscure_factor: 0,
@@ -352,6 +358,8 @@ impl ChannelMonitor {
                                revocation_base_key: revocation_base_key.clone(),
                                htlc_base_key: htlc_base_key.clone(),
                                delayed_payment_base_key: delayed_payment_base_key.clone(),
+                               payment_base_key: payment_base_key.clone(),
+                               shutdown_pubkey: shutdown_pubkey.clone(),
                                prev_latest_per_commitment_point: None,
                                latest_per_commitment_point: None,
                        },
@@ -364,16 +372,19 @@ impl ChannelMonitor {
 
                        old_secrets: [([0; 32], 1 << 48); 49],
                        remote_claimable_outpoints: HashMap::new(),
-                       remote_commitment_txn_on_chain: Mutex::new(HashMap::new()),
+                       remote_commitment_txn_on_chain: HashMap::new(),
                        remote_hash_commitment_number: HashMap::new(),
 
                        prev_local_signed_commitment_tx: None,
                        current_local_signed_commitment_tx: None,
+                       current_remote_commitment_number: 1 << 48,
 
                        payment_preimages: HashMap::new(),
-
                        destination_script: destination_script,
+
+                       last_block_hash: Default::default(),
                        secp_ctx: Secp256k1::new(),
+                       logger,
                }
        }
 
@@ -402,42 +413,19 @@ impl ChannelMonitor {
                res
        }
 
-       /// Inserts a revocation secret into this channel monitor. Also optionally tracks the next
-       /// revocation point which may be required to claim HTLC outputs which we know the preimage of
-       /// in case the remote end force-closes using their latest state. Prunes old preimages if neither
+       /// Inserts a revocation secret into this channel monitor. Prunes old preimages if neither
        /// needed by local commitment transactions HTCLs nor by remote ones. Unless we haven't already seen remote
        /// commitment transaction's secret, they are de facto pruned (we can use revocation key).
-       pub(super) fn provide_secret(&mut self, idx: u64, secret: [u8; 32], their_next_revocation_point: Option<(u64, PublicKey)>) -> Result<(), HandleError> {
+       pub(super) fn provide_secret(&mut self, idx: u64, secret: [u8; 32]) -> Result<(), MonitorUpdateError> {
                let pos = ChannelMonitor::place_secret(idx);
                for i in 0..pos {
                        let (old_secret, old_idx) = self.old_secrets[i as usize];
                        if ChannelMonitor::derive_secret(secret, pos, old_idx) != old_secret {
-                               return Err(HandleError{err: "Previous secret did not match new one", action: None})
+                               return Err(MonitorUpdateError("Previous secret did not match new one"));
                        }
                }
                self.old_secrets[pos as usize] = (secret, idx);
 
-               if let Some(new_revocation_point) = their_next_revocation_point {
-                       match self.their_cur_revocation_points {
-                               Some(old_points) => {
-                                       if old_points.0 == new_revocation_point.0 + 1 {
-                                               self.their_cur_revocation_points = Some((old_points.0, old_points.1, Some(new_revocation_point.1)));
-                                       } else if old_points.0 == new_revocation_point.0 + 2 {
-                                               if let Some(old_second_point) = old_points.2 {
-                                                       self.their_cur_revocation_points = Some((old_points.0 - 1, old_second_point, Some(new_revocation_point.1)));
-                                               } else {
-                                                       self.their_cur_revocation_points = Some((new_revocation_point.0, new_revocation_point.1, None));
-                                               }
-                                       } else {
-                                               self.their_cur_revocation_points = Some((new_revocation_point.0, new_revocation_point.1, None));
-                                       }
-                               },
-                               None => {
-                                       self.their_cur_revocation_points = Some((new_revocation_point.0, new_revocation_point.1, None));
-                               }
-                       }
-               }
-
                if !self.payment_preimages.is_empty() {
                        let local_signed_commitment_tx = self.current_local_signed_commitment_tx.as_ref().expect("Channel needs at least an initial commitment tx !");
                        let prev_local_signed_commitment_tx = self.prev_local_signed_commitment_tx.as_ref();
@@ -473,6 +461,32 @@ impl ChannelMonitor {
                Ok(())
        }
 
+       /// Tracks the next revocation point which may be required to claim HTLC outputs which we know
+       /// the preimage of in case the remote end force-closes using their latest state. When called at
+       /// channel opening revocation point is the CURRENT one used for first commitment tx. Needed in case of sizeable push_msat.
+       pub(super) fn provide_their_next_revocation_point(&mut self, their_next_revocation_point: Option<(u64, PublicKey)>) {
+               if let Some(new_revocation_point) = their_next_revocation_point {
+                       match self.their_cur_revocation_points {
+                               Some(old_points) => {
+                                       if old_points.0 == new_revocation_point.0 + 1 {
+                                               self.their_cur_revocation_points = Some((old_points.0, old_points.1, Some(new_revocation_point.1)));
+                                       } else if old_points.0 == new_revocation_point.0 + 2 {
+                                               if let Some(old_second_point) = old_points.2 {
+                                                       self.their_cur_revocation_points = Some((old_points.0 - 1, old_second_point, Some(new_revocation_point.1)));
+                                               } else {
+                                                       self.their_cur_revocation_points = Some((new_revocation_point.0, new_revocation_point.1, None));
+                                               }
+                                       } else {
+                                               self.their_cur_revocation_points = Some((new_revocation_point.0, new_revocation_point.1, None));
+                                       }
+                               },
+                               None => {
+                                       self.their_cur_revocation_points = Some((new_revocation_point.0, new_revocation_point.1, None));
+                               }
+                       }
+               }
+       }
+
        /// Informs this monitor of the latest remote (ie non-broadcastable) commitment transaction.
        /// The monitor watches for it to be broadcasted and then uses the HTLC information (and
        /// possibly future revocation/preimage information) to claim outputs where possible.
@@ -486,6 +500,7 @@ impl ChannelMonitor {
                        self.remote_hash_commitment_number.insert(htlc.payment_hash, commitment_number);
                }
                self.remote_claimable_outpoints.insert(unsigned_commitment_tx.txid(), htlc_outputs);
+               self.current_remote_commitment_number = commitment_number;
        }
 
        /// Informs this monitor of the latest local (ie broadcastable) commitment transaction. The
@@ -508,11 +523,13 @@ impl ChannelMonitor {
                        feerate_per_kw,
                        htlc_outputs,
                });
-               self.key_storage = if let KeyStorage::PrivMode { ref revocation_base_key, ref htlc_base_key, ref delayed_payment_base_key, prev_latest_per_commitment_point: _, ref latest_per_commitment_point } = self.key_storage {
+               self.key_storage = if let KeyStorage::PrivMode { ref revocation_base_key, ref htlc_base_key, ref delayed_payment_base_key, ref payment_base_key, ref shutdown_pubkey, ref latest_per_commitment_point, .. } = self.key_storage {
                        KeyStorage::PrivMode {
                                revocation_base_key: *revocation_base_key,
                                htlc_base_key: *htlc_base_key,
                                delayed_payment_base_key: *delayed_payment_base_key,
+                               payment_base_key: *payment_base_key,
+                               shutdown_pubkey: *shutdown_pubkey,
                                prev_latest_per_commitment_point: *latest_per_commitment_point,
                                latest_per_commitment_point: Some(local_keys.per_commitment_point),
                        }
@@ -528,12 +545,12 @@ impl ChannelMonitor {
        /// Combines this ChannelMonitor with the information contained in the other ChannelMonitor.
        /// After a successful call this ChannelMonitor is up-to-date and is safe to use to monitor the
        /// chain for new blocks/transactions.
-       pub fn insert_combine(&mut self, mut other: ChannelMonitor) -> Result<(), HandleError> {
+       pub fn insert_combine(&mut self, mut other: ChannelMonitor) -> Result<(), MonitorUpdateError> {
                if self.funding_txo.is_some() {
                        // We should be able to compare the entire funding_txo, but in fuzztarget its trivially
                        // easy to collide the funding_txo hash and have a different scriptPubKey.
                        if other.funding_txo.is_some() && other.funding_txo.as_ref().unwrap().0 != self.funding_txo.as_ref().unwrap().0 {
-                               return Err(HandleError{err: "Funding transaction outputs are not identical!", action: None});
+                               return Err(MonitorUpdateError("Funding transaction outputs are not identical!"));
                        }
                } else {
                        self.funding_txo = other.funding_txo.take();
@@ -541,8 +558,19 @@ impl ChannelMonitor {
                let other_min_secret = other.get_min_seen_secret();
                let our_min_secret = self.get_min_seen_secret();
                if our_min_secret > other_min_secret {
-                       self.provide_secret(other_min_secret, other.get_secret(other_min_secret).unwrap(), None)?;
+                       self.provide_secret(other_min_secret, other.get_secret(other_min_secret).unwrap())?;
+               }
+               if let Some(ref local_tx) = self.current_local_signed_commitment_tx {
+                       if let Some(ref other_local_tx) = other.current_local_signed_commitment_tx {
+                               let our_commitment_number = 0xffffffffffff - ((((local_tx.tx.input[0].sequence as u64 & 0xffffff) << 3*8) | (local_tx.tx.lock_time as u64 & 0xffffff)) ^ self.commitment_transaction_number_obscure_factor);
+                               let other_commitment_number = 0xffffffffffff - ((((other_local_tx.tx.input[0].sequence as u64 & 0xffffff) << 3*8) | (other_local_tx.tx.lock_time as u64 & 0xffffff)) ^ other.commitment_transaction_number_obscure_factor);
+                               if our_commitment_number >= other_commitment_number {
+                                       self.key_storage = other.key_storage;
+                               }
+                       }
                }
+               // TODO: We should use current_remote_commitment_number and the commitment number out of
+               // local transactions to decide how to merge
                if our_min_secret >= other_min_secret {
                        self.their_cur_revocation_points = other.their_cur_revocation_points;
                        for (txid, htlcs) in other.remote_claimable_outpoints.drain() {
@@ -556,6 +584,8 @@ impl ChannelMonitor {
                        }
                        self.payment_preimages = other.payment_preimages;
                }
+
+               self.current_remote_commitment_number = cmp::min(self.current_remote_commitment_number, other.current_remote_commitment_number);
                Ok(())
        }
 
@@ -597,6 +627,20 @@ impl ChannelMonitor {
                }
        }
 
+       /// Gets the sets of all outpoints which this ChannelMonitor expects to hear about spends of.
+       /// Generally useful when deserializing as during normal operation the return values of
+       /// block_connected are sufficient to ensure all relevant outpoints are being monitored (note
+       /// that the get_funding_txo outpoint and transaction must also be monitored for!).
+       pub fn get_monitored_outpoints(&self) -> Vec<(Sha256dHash, u32, &Script)> {
+               let mut res = Vec::with_capacity(self.remote_commitment_txn_on_chain.len() * 2);
+               for (ref txid, &(_, ref outputs)) in self.remote_commitment_txn_on_chain.iter() {
+                       for (idx, output) in outputs.iter().enumerate() {
+                               res.push(((*txid).clone(), idx as u32, output));
+                       }
+               }
+               res
+       }
+
        /// Serializes into a vec, with various modes for the exposed pub fns
        fn write<W: Writer>(&self, writer: &mut W, for_local_storage: bool) -> Result<(), ::std::io::Error> {
                //TODO: We still write out all the serialization here manually instead of using the fancy
@@ -608,8 +652,7 @@ impl ChannelMonitor {
                        &Some((ref outpoint, ref script)) => {
                                writer.write_all(&outpoint.txid[..])?;
                                writer.write_all(&byte_utils::be16_to_array(outpoint.index))?;
-                               writer.write_all(&byte_utils::be64_to_array(script.len() as u64))?;
-                               writer.write_all(&script[..])?;
+                               script.write(writer)?;
                        },
                        &None => {
                                // We haven't even been initialized...not sure why anyone is serializing us, but
@@ -619,14 +662,16 @@ impl ChannelMonitor {
                }
 
                // Set in initial Channel-object creation, so should always be set by now:
-               writer.write_all(&byte_utils::be48_to_array(self.commitment_transaction_number_obscure_factor))?;
+               U48(self.commitment_transaction_number_obscure_factor).write(writer)?;
 
                match self.key_storage {
-                       KeyStorage::PrivMode { ref revocation_base_key, ref htlc_base_key, ref delayed_payment_base_key, ref prev_latest_per_commitment_point, ref latest_per_commitment_point } => {
+                       KeyStorage::PrivMode { ref revocation_base_key, ref htlc_base_key, ref delayed_payment_base_key, ref payment_base_key, ref shutdown_pubkey, ref prev_latest_per_commitment_point, ref latest_per_commitment_point } => {
                                writer.write_all(&[0; 1])?;
                                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())?;
                                if let Some(ref prev_latest_per_commitment_point) = *prev_latest_per_commitment_point {
                                        writer.write_all(&[1; 1])?;
                                        writer.write_all(&prev_latest_per_commitment_point.serialize())?;
@@ -684,7 +729,7 @@ impl ChannelMonitor {
                }
 
                writer.write_all(&byte_utils::be64_to_array(self.remote_claimable_outpoints.len() as u64))?;
-               for (txid, htlc_outputs) in self.remote_claimable_outpoints.iter() {
+               for (ref txid, ref htlc_outputs) in self.remote_claimable_outpoints.iter() {
                        writer.write_all(&txid[..])?;
                        writer.write_all(&byte_utils::be64_to_array(htlc_outputs.len() as u64))?;
                        for htlc_output in htlc_outputs.iter() {
@@ -692,19 +737,20 @@ impl ChannelMonitor {
                        }
                }
 
-               {
-                       let remote_commitment_txn_on_chain = self.remote_commitment_txn_on_chain.lock().unwrap();
-                       writer.write_all(&byte_utils::be64_to_array(remote_commitment_txn_on_chain.len() as u64))?;
-                       for (txid, commitment_number) in remote_commitment_txn_on_chain.iter() {
-                               writer.write_all(&txid[..])?;
-                               writer.write_all(&byte_utils::be48_to_array(*commitment_number))?;
+               writer.write_all(&byte_utils::be64_to_array(self.remote_commitment_txn_on_chain.len() as u64))?;
+               for (ref txid, &(commitment_number, ref txouts)) in self.remote_commitment_txn_on_chain.iter() {
+                       writer.write_all(&txid[..])?;
+                       writer.write_all(&byte_utils::be48_to_array(commitment_number))?;
+                       (txouts.len() as u64).write(writer)?;
+                       for script in txouts.iter() {
+                               script.write(writer)?;
                        }
                }
 
                if for_local_storage {
                        writer.write_all(&byte_utils::be64_to_array(self.remote_hash_commitment_number.len() as u64))?;
-                       for (payment_hash, commitment_number) in self.remote_hash_commitment_number.iter() {
-                               writer.write_all(payment_hash)?;
+                       for (ref payment_hash, commitment_number) in self.remote_hash_commitment_number.iter() {
+                               writer.write_all(*payment_hash)?;
                                writer.write_all(&byte_utils::be48_to_array(*commitment_number))?;
                        }
                } else {
@@ -713,9 +759,12 @@ impl ChannelMonitor {
 
                macro_rules! serialize_local_tx {
                        ($local_tx: expr) => {
-                               let tx_ser = serialize::serialize(&$local_tx.tx).unwrap();
-                               writer.write_all(&byte_utils::be64_to_array(tx_ser.len() as u64))?;
-                               writer.write_all(&tx_ser)?;
+                               if let Err(e) = $local_tx.tx.consensus_encode(&mut WriterWriteAdaptor(writer)) {
+                                       match e {
+                                               encode::Error::Io(e) => return Err(e),
+                                               _ => panic!("local tx must have been well-formed!"),
+                                       }
+                               }
 
                                writer.write_all(&$local_tx.revocation_key.serialize())?;
                                writer.write_all(&$local_tx.a_htlc_key.serialize())?;
@@ -746,23 +795,41 @@ impl ChannelMonitor {
                        writer.write_all(&[0; 1])?;
                }
 
+               if for_local_storage {
+                       writer.write_all(&byte_utils::be48_to_array(self.current_remote_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)?;
                }
 
-               writer.write_all(&byte_utils::be64_to_array(self.destination_script.len() as u64))?;
-               writer.write_all(&self.destination_script[..])?;
+               self.last_block_hash.write(writer)?;
+               self.destination_script.write(writer)?;
 
                Ok(())
        }
 
        /// Writes this monitor into the given writer, suitable for writing to disk.
+       ///
+       /// Note that the deserializer is only implemented for (Sha256dHash, ChannelMonitor), which
+       /// tells you the last block hash which was block_connect()ed. You MUST rescan any blocks along
+       /// the "reorg path" (ie not just starting at the same height but starting at the highest
+       /// common block that appears on your best chain as well as on the chain which contains the
+       /// last block hash returned) upon deserializing the object!
        pub fn write_for_disk<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
                self.write(writer, true)
        }
 
        /// Encodes this monitor into the given writer, suitable for sending to a remote watchtower
+       ///
+       /// Note that the deserializer is only implemented for (Sha256dHash, ChannelMonitor), which
+       /// tells you the last block hash which was block_connect()ed. You MUST rescan any blocks along
+       /// the "reorg path" (ie not just starting at the same height but starting at the highest
+       /// common block that appears on your best chain as well as on the chain which contains the
+       /// last block hash returned) upon deserializing the object!
        pub fn write_for_watchtower<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
                self.write(writer, false)
        }
@@ -771,14 +838,14 @@ impl ChannelMonitor {
        //we want to leave out (eg funding_txo, etc).
 
        /// Can only fail if idx is < get_min_seen_secret
-       pub(super) fn get_secret(&self, idx: u64) -> Result<[u8; 32], HandleError> {
+       pub(super) fn get_secret(&self, idx: u64) -> Option<[u8; 32]> {
                for i in 0..self.old_secrets.len() {
                        if (idx & (!((1 << i) - 1))) == self.old_secrets[i].1 {
-                               return Ok(ChannelMonitor::derive_secret(self.old_secrets[i].0, i as u8, idx))
+                               return Some(ChannelMonitor::derive_secret(self.old_secrets[i].0, i as u8, idx))
                        }
                }
                assert!(idx < self.get_min_seen_secret());
-               Err(HandleError{err: "idx too low", action: None})
+               None
        }
 
        pub(super) fn get_min_seen_secret(&self) -> u64 {
@@ -792,11 +859,21 @@ impl ChannelMonitor {
                min
        }
 
+       pub(super) fn get_cur_remote_commitment_number(&self) -> u64 {
+               self.current_remote_commitment_number
+       }
+
+       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.input[0].sequence as u64 & 0xffffff) << 3*8) | (local_tx.tx.lock_time as u64 & 0xffffff)) ^ self.commitment_transaction_number_obscure_factor)
+               } else { 0xffff_ffff_ffff }
+       }
+
        /// Attempts to claim a remote commitment transaction's outputs using the revocation key and
        /// data in remote_claimable_outpoints. Will directly claim any HTLC outputs which expire at a
        /// height > height + CLTV_SHARED_CLAIM_BUFFER. In any case, will install monitoring for
        /// HTLC-Success/HTLC-Timeout transactions.
-       fn check_spend_remote_transaction(&self, tx: &Transaction, height: u32) -> (Vec<Transaction>, (Sha256dHash, Vec<TxOut>), Vec<SpendableOutputDescriptor>) {
+       fn check_spend_remote_transaction(&mut self, tx: &Transaction, height: u32) -> (Vec<Transaction>, (Sha256dHash, Vec<TxOut>), Vec<SpendableOutputDescriptor>) {
                // 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 txn_to_broadcast = Vec::new();
@@ -859,7 +936,23 @@ impl ChannelMonitor {
                                        htlc_idxs.push(None);
                                        values.push(outp.value);
                                        total_value += outp.value;
-                                       break; // There can only be one of these
+                               } else if outp.script_pubkey.is_v0_p2wpkh() {
+                                       match self.key_storage {
+                                               KeyStorage::PrivMode { ref payment_base_key, .. } => {
+                                                       let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key);
+                                                       if let Ok(local_key) = chan_utils::derive_private_key(&self.secp_ctx, &per_commitment_point, &payment_base_key) {
+                                                               spendable_outputs.push(SpendableOutputDescriptor::DynamicOutputP2WPKH {
+                                                                       outpoint: BitcoinOutPoint { txid: commitment_txid, vout: idx as u32 },
+                                                                       key: local_key,
+                                                                       output: outp.clone(),
+                                                               });
+                                                       }
+                                               }
+                                               KeyStorage::SigsMode { .. } => {
+                                                       //TODO: we need to ensure an offline client will generate the event when it
+                                                       // cames back online after only the watchtower saw the transaction
+                                               }
+                                       }
                                }
                        }
 
@@ -936,7 +1029,7 @@ impl ChannelMonitor {
                        if !inputs.is_empty() || !txn_to_broadcast.is_empty() { // ie we're confident this is actually ours
                                // We're definitely a remote commitment transaction!
                                watch_outputs.append(&mut tx.output.clone());
-                               self.remote_commitment_txn_on_chain.lock().unwrap().insert(commitment_txid, commitment_number);
+                               self.remote_commitment_txn_on_chain.insert(commitment_txid, (commitment_number, tx.output.iter().map(|output| { output.script_pubkey.clone() }).collect()));
                        }
                        if inputs.is_empty() { return (txn_to_broadcast, (commitment_txid, watch_outputs), spendable_outputs); } // Nothing to be done...probably a false positive/local tx
 
@@ -973,7 +1066,7 @@ impl ChannelMonitor {
                        // not being generated by the above conditional. Thus, to be safe, we go ahead and
                        // insert it here.
                        watch_outputs.append(&mut tx.output.clone());
-                       self.remote_commitment_txn_on_chain.lock().unwrap().insert(commitment_txid, commitment_number);
+                       self.remote_commitment_txn_on_chain.insert(commitment_txid, (commitment_number, tx.output.iter().map(|output| { output.script_pubkey.clone() }).collect()));
 
                        if let Some(revocation_points) = self.their_cur_revocation_points {
                                let revocation_point_option =
@@ -997,6 +1090,28 @@ impl ChannelMonitor {
                                                Some(their_htlc_base_key) => ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, revocation_point, &their_htlc_base_key)),
                                        };
 
+
+                                       for (idx, outp) in tx.output.iter().enumerate() {
+                                               if outp.script_pubkey.is_v0_p2wpkh() {
+                                                       match self.key_storage {
+                                                               KeyStorage::PrivMode { 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(),
+                                                                               });
+                                                                       }
+                                                               }
+                                                               KeyStorage::SigsMode { .. } => {
+                                                                       //TODO: we need to ensure an offline client will generate the event when it
+                                                                       // cames back online after only the watchtower saw the transaction
+                                                               }
+                                                       }
+                                                       break; // Only to_remote ouput is claimable
+                                               }
+                                       }
+
                                        let mut total_value = 0;
                                        let mut values = Vec::new();
                                        let mut inputs = Vec::new();
@@ -1108,7 +1223,7 @@ impl ChannelMonitor {
                        };
                }
 
-               let secret = ignore_error!(self.get_secret(commitment_number));
+               let secret = if let Some(secret) = self.get_secret(commitment_number) { secret } else { return (None, None); };
                let per_commitment_key = ignore_error!(SecretKey::from_slice(&self.secp_ctx, &secret));
                let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key);
                let revocation_pubkey = match self.key_storage {
@@ -1183,6 +1298,34 @@ impl ChannelMonitor {
                let mut res = Vec::with_capacity(local_tx.htlc_outputs.len());
                let mut spendable_outputs = Vec::with_capacity(local_tx.htlc_outputs.len());
 
+               macro_rules! add_dynamic_output {
+                       ($father_tx: expr, $vout: expr) => {
+                               if let Some(ref per_commitment_point) = *per_commitment_point {
+                                       if let Some(ref delayed_payment_base_key) = *delayed_payment_base_key {
+                                               if let Ok(local_delayedkey) = chan_utils::derive_private_key(&self.secp_ctx, per_commitment_point, delayed_payment_base_key) {
+                                                       spendable_outputs.push(SpendableOutputDescriptor::DynamicOutputP2WSH {
+                                                               outpoint: BitcoinOutPoint { txid: $father_tx.txid(), vout: $vout },
+                                                               key: local_delayedkey,
+                                                               witness_script: chan_utils::get_revokeable_redeemscript(&local_tx.revocation_key, self.our_to_self_delay, &local_tx.delayed_payment_key),
+                                                               to_self_delay: self.our_to_self_delay,
+                                                               output: $father_tx.output[$vout as usize].clone(),
+                                                       });
+                                               }
+                                       }
+                               }
+                       }
+               }
+
+
+               let redeemscript = chan_utils::get_revokeable_redeemscript(&local_tx.revocation_key, self.their_to_self_delay.unwrap(), &local_tx.delayed_payment_key);
+               let revokeable_p2wsh = redeemscript.to_v0_p2wsh();
+               for (idx, output) in local_tx.tx.output.iter().enumerate() {
+                       if output.script_pubkey == revokeable_p2wsh {
+                               add_dynamic_output!(local_tx.tx, idx as u32);
+                               break;
+                       }
+               }
+
                for &(ref htlc, ref their_sig, ref our_sig) in local_tx.htlc_outputs.iter() {
                        if htlc.offered {
                                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);
@@ -1197,18 +1340,7 @@ impl ChannelMonitor {
                                htlc_timeout_tx.input[0].witness.push(Vec::new());
                                htlc_timeout_tx.input[0].witness.push(chan_utils::get_htlc_redeemscript_with_explicit_keys(htlc, &local_tx.a_htlc_key, &local_tx.b_htlc_key, &local_tx.revocation_key).into_bytes());
 
-                               if let Some(ref per_commitment_point) = *per_commitment_point {
-                                       if let Some(ref delayed_payment_base_key) = *delayed_payment_base_key {
-                                               if let Ok(local_delayedkey) = chan_utils::derive_private_key(&self.secp_ctx, per_commitment_point, delayed_payment_base_key) {
-                                                       spendable_outputs.push(SpendableOutputDescriptor::DynamicOutput {
-                                                               outpoint: BitcoinOutPoint { txid: htlc_timeout_tx.txid(), vout: 0 },
-                                                               local_delayedkey,
-                                                               witness_script: chan_utils::get_revokeable_redeemscript(&local_tx.revocation_key, self.our_to_self_delay, &local_tx.delayed_payment_key),
-                                                               to_self_delay: self.our_to_self_delay
-                                                       });
-                                               }
-                                       }
-                               }
+                               add_dynamic_output!(htlc_timeout_tx, 0);
                                res.push(htlc_timeout_tx);
                        } else {
                                if let Some(payment_preimage) = self.payment_preimages.get(&htlc.payment_hash) {
@@ -1224,18 +1356,7 @@ impl ChannelMonitor {
                                        htlc_success_tx.input[0].witness.push(payment_preimage.to_vec());
                                        htlc_success_tx.input[0].witness.push(chan_utils::get_htlc_redeemscript_with_explicit_keys(htlc, &local_tx.a_htlc_key, &local_tx.b_htlc_key, &local_tx.revocation_key).into_bytes());
 
-                                       if let Some(ref per_commitment_point) = *per_commitment_point {
-                                               if let Some(ref delayed_payment_base_key) = *delayed_payment_base_key {
-                                                       if let Ok(local_delayedkey) = chan_utils::derive_private_key(&self.secp_ctx, per_commitment_point, delayed_payment_base_key) {
-                                                               spendable_outputs.push(SpendableOutputDescriptor::DynamicOutput {
-                                                                       outpoint: BitcoinOutPoint { txid: htlc_success_tx.txid(), vout: 0 },
-                                                                       local_delayedkey,
-                                                                       witness_script: chan_utils::get_revokeable_redeemscript(&local_tx.revocation_key, self.our_to_self_delay, &local_tx.delayed_payment_key),
-                                                                       to_self_delay: self.our_to_self_delay
-                                                               });
-                                                       }
-                                               }
-                                       }
+                                       add_dynamic_output!(htlc_success_tx, 0);
                                        res.push(htlc_success_tx);
                                }
                        }
@@ -1252,7 +1373,7 @@ impl ChannelMonitor {
                if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
                        if local_tx.txid == commitment_txid {
                                match self.key_storage {
-                                       KeyStorage::PrivMode { revocation_base_key: _, htlc_base_key: _, ref delayed_payment_base_key, prev_latest_per_commitment_point: _, ref latest_per_commitment_point } => {
+                                       KeyStorage::PrivMode { ref delayed_payment_base_key, ref latest_per_commitment_point, .. } => {
                                                return self.broadcast_by_local_state(local_tx, latest_per_commitment_point, &Some(*delayed_payment_base_key));
                                        },
                                        KeyStorage::SigsMode { .. } => {
@@ -1264,7 +1385,7 @@ impl ChannelMonitor {
                if let &Some(ref local_tx) = &self.prev_local_signed_commitment_tx {
                        if local_tx.txid == commitment_txid {
                                match self.key_storage {
-                                       KeyStorage::PrivMode { revocation_base_key: _, htlc_base_key: _, ref delayed_payment_base_key, ref prev_latest_per_commitment_point, .. } => {
+                                       KeyStorage::PrivMode { ref delayed_payment_base_key, ref prev_latest_per_commitment_point, .. } => {
                                                return self.broadcast_by_local_state(local_tx, prev_latest_per_commitment_point, &Some(*delayed_payment_base_key));
                                        },
                                        KeyStorage::SigsMode { .. } => {
@@ -1276,7 +1397,49 @@ impl ChannelMonitor {
                (Vec::new(), Vec::new())
        }
 
-       fn block_connected(&self, txn_matched: &[&Transaction], height: u32, broadcaster: &BroadcasterInterface)-> (Vec<(Sha256dHash, Vec<TxOut>)>, Vec<SpendableOutputDescriptor>) {
+       /// 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.last().unwrap().len() == 71 {
+                       match self.key_storage {
+                               KeyStorage::PrivMode { ref shutdown_pubkey, .. } =>  {
+                                       let our_channel_close_key_hash = Hash160::from_data(&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(),
+                                                       });
+                                               }
+                                       }
+                               }
+                               KeyStorage::SigsMode { .. } => {
+                                       //TODO: we need to ensure an offline client will generate the event when it
+                                       // cames back online after only the watchtower saw the transaction
+                               }
+                       }
+               }
+               None
+       }
+
+       /// Used by ChannelManager deserialization to broadcast the latest local state if it's copy of
+       /// the Channel was out-of-date.
+       pub(super) fn get_latest_local_commitment_txn(&self) -> Vec<Transaction> {
+               if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
+                       let mut res = vec![local_tx.tx.clone()];
+                       match self.key_storage {
+                               KeyStorage::PrivMode { ref delayed_payment_base_key, ref prev_latest_per_commitment_point, .. } => {
+                                       res.append(&mut self.broadcast_by_local_state(local_tx, prev_latest_per_commitment_point, &Some(*delayed_payment_base_key)).0);
+                               },
+                               _ => panic!("Can only broadcast by local channelmonitor"),
+                       };
+                       res
+               } else {
+                       Vec::new()
+               }
+       }
+
+       fn block_connected(&mut self, txn_matched: &[&Transaction], height: u32, block_hash: &Sha256dHash, broadcaster: &BroadcasterInterface)-> (Vec<(Sha256dHash, Vec<TxOut>)>, Vec<SpendableOutputDescriptor>) {
                let mut watch_outputs = Vec::new();
                let mut spendable_outputs = Vec::new();
                for tx in txn_matched {
@@ -1299,10 +1462,14 @@ impl ChannelMonitor {
                                                spendable_outputs.append(&mut outputs);
                                                txn = remote_txn;
                                        }
+                                       if !self.funding_txo.is_none() && txn.is_empty() {
+                                               if let Some(spendable_output) = self.check_spend_closing_transaction(tx) {
+                                                       spendable_outputs.push(spendable_output);
+                                               }
+                                       }
                                } else {
-                                       let remote_commitment_txn_on_chain = self.remote_commitment_txn_on_chain.lock().unwrap();
-                                       if let Some(commitment_number) = remote_commitment_txn_on_chain.get(&prevout.txid) {
-                                               let (tx, spendable_output) = self.check_spend_remote_htlc(tx, *commitment_number);
+                                       if let Some(&(commitment_number, _)) = self.remote_commitment_txn_on_chain.get(&prevout.txid) {
+                                               let (tx, spendable_output) = self.check_spend_remote_htlc(tx, commitment_number);
                                                if let Some(tx) = tx {
                                                        txn.push(tx);
                                                }
@@ -1320,7 +1487,7 @@ impl ChannelMonitor {
                        if self.would_broadcast_at_height(height) {
                                broadcaster.broadcast_transaction(&cur_local_tx.tx);
                                match self.key_storage {
-                                       KeyStorage::PrivMode { revocation_base_key: _, htlc_base_key: _, ref delayed_payment_base_key, prev_latest_per_commitment_point: _, ref latest_per_commitment_point } => {
+                                       KeyStorage::PrivMode { ref delayed_payment_base_key, ref latest_per_commitment_point, .. } => {
                                                let (txs, mut outputs) = self.broadcast_by_local_state(&cur_local_tx, latest_per_commitment_point, &Some(*delayed_payment_base_key));
                                                spendable_outputs.append(&mut outputs);
                                                for tx in txs {
@@ -1337,6 +1504,7 @@ impl ChannelMonitor {
                                }
                        }
                }
+               self.last_block_hash = block_hash.clone();
                (watch_outputs, spendable_outputs)
        }
 
@@ -1373,27 +1541,10 @@ impl ChannelMonitor {
        }
 }
 
-impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
-       fn read(reader: &mut R) -> Result<Self, DecodeError> {
-               // TODO: read_to_end and then deserializing from that vector is really dumb, we should
-               // actually use the fancy serialization framework we have instead of hacking around it.
-               let mut datavec = Vec::new();
-               reader.read_to_end(&mut datavec)?;
-               let data = &datavec;
-
-               let mut read_pos = 0;
-               macro_rules! read_bytes {
-                       ($byte_count: expr) => {
-                               {
-                                       if ($byte_count as usize) > data.len() - read_pos {
-                                               return Err(DecodeError::ShortRead);
-                                       }
-                                       read_pos += $byte_count as usize;
-                                       &data[read_pos - $byte_count as usize..read_pos]
-                               }
-                       }
-               }
+const MAX_ALLOC_SIZE: usize = 64*1024;
 
+impl<R: ::std::io::Read> ReadableArgs<R, Arc<Logger>> for (Sha256dHash, ChannelMonitor) {
+       fn read(reader: &mut R, logger: Arc<Logger>) -> Result<Self, DecodeError> {
                let secp_ctx = Secp256k1::new();
                macro_rules! unwrap_obj {
                        ($key: expr) => {
@@ -1404,8 +1555,8 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                        }
                }
 
-               let _ver = read_bytes!(1)[0];
-               let min_ver = read_bytes!(1)[0];
+               let _ver: u8 = Readable::read(reader)?;
+               let min_ver: u8 = Readable::read(reader)?;
                if min_ver > SERIALIZATION_VERSION {
                        return Err(DecodeError::UnknownVersion);
                }
@@ -1413,36 +1564,35 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                // 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: Sha256dHash::from(read_bytes!(32)),
-                       index: byte_utils::slice_to_be16(read_bytes!(2)),
+                       txid: Readable::read(reader)?,
+                       index: Readable::read(reader)?,
                };
-               let script_len = byte_utils::slice_to_be64(read_bytes!(8));
-               let funding_txo = Some((outpoint, Script::from(read_bytes!(script_len).to_vec())));
-               let commitment_transaction_number_obscure_factor = byte_utils::slice_to_be48(read_bytes!(6));
+               let funding_txo = Some((outpoint, Readable::read(reader)?));
+               let commitment_transaction_number_obscure_factor = <U48 as Readable<R>>::read(reader)?.0;
 
-               let key_storage = match read_bytes!(1)[0] {
+               let key_storage = match <u8 as Readable<R>>::read(reader)? {
                        0 => {
-                               let revocation_base_key = unwrap_obj!(SecretKey::from_slice(&secp_ctx, read_bytes!(32)));
-                               let htlc_base_key = unwrap_obj!(SecretKey::from_slice(&secp_ctx, read_bytes!(32)));
-                               let delayed_payment_base_key = unwrap_obj!(SecretKey::from_slice(&secp_ctx, read_bytes!(32)));
-                               let prev_latest_per_commitment_point = match read_bytes!(1)[0] {
-                                               0 => None,
-                                               1 => {
-                                                       Some(unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33))))
-                                               },
-                                               _ => return Err(DecodeError::InvalidValue),
+                               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)?;
+                               let prev_latest_per_commitment_point = match <u8 as Readable<R>>::read(reader)? {
+                                       0 => None,
+                                       1 => Some(Readable::read(reader)?),
+                                       _ => return Err(DecodeError::InvalidValue),
                                };
-                               let latest_per_commitment_point = match read_bytes!(1)[0] {
-                                               0 => None,
-                                               1 => {
-                                                       Some(unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33))))
-                                               },
-                                               _ => return Err(DecodeError::InvalidValue),
+                               let latest_per_commitment_point = match <u8 as Readable<R>>::read(reader)? {
+                                       0 => None,
+                                       1 => Some(Readable::read(reader)?),
+                                       _ => return Err(DecodeError::InvalidValue),
                                };
                                KeyStorage::PrivMode {
                                        revocation_base_key,
                                        htlc_base_key,
                                        delayed_payment_base_key,
+                                       payment_base_key,
+                                       shutdown_pubkey,
                                        prev_latest_per_commitment_point,
                                        latest_per_commitment_point,
                                }
@@ -1450,45 +1600,41 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                        _ => return Err(DecodeError::InvalidValue),
                };
 
-               let their_htlc_base_key = Some(unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33))));
-               let their_delayed_payment_base_key = Some(unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33))));
+               let their_htlc_base_key = Some(Readable::read(reader)?);
+               let their_delayed_payment_base_key = Some(Readable::read(reader)?);
 
                let their_cur_revocation_points = {
-                       let first_idx = byte_utils::slice_to_be48(read_bytes!(6));
+                       let first_idx = <U48 as Readable<R>>::read(reader)?.0;
                        if first_idx == 0 {
                                None
                        } else {
-                               let first_point = unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33)));
-                               let second_point_slice = read_bytes!(33);
+                               let first_point = Readable::read(reader)?;
+                               let second_point_slice: [u8; 33] = Readable::read(reader)?;
                                if second_point_slice[0..32] == [0; 32] && second_point_slice[32] == 0 {
                                        Some((first_idx, first_point, None))
                                } else {
-                                       Some((first_idx, first_point, Some(unwrap_obj!(PublicKey::from_slice(&secp_ctx, second_point_slice)))))
+                                       Some((first_idx, first_point, Some(unwrap_obj!(PublicKey::from_slice(&secp_ctx, &second_point_slice)))))
                                }
                        }
                };
 
-               let our_to_self_delay = byte_utils::slice_to_be16(read_bytes!(2));
-               let their_to_self_delay = Some(byte_utils::slice_to_be16(read_bytes!(2)));
+               let our_to_self_delay: u16 = Readable::read(reader)?;
+               let their_to_self_delay: Option<u16> = Some(Readable::read(reader)?);
 
                let mut old_secrets = [([0; 32], 1 << 48); 49];
                for &mut (ref mut secret, ref mut idx) in old_secrets.iter_mut() {
-                       secret.copy_from_slice(read_bytes!(32));
-                       *idx = byte_utils::slice_to_be64(read_bytes!(8));
+                       *secret = Readable::read(reader)?;
+                       *idx = Readable::read(reader)?;
                }
 
                macro_rules! read_htlc_in_commitment {
                        () => {
                                {
-                                       let offered = match read_bytes!(1)[0] {
-                                               0 => false, 1 => true,
-                                               _ => return Err(DecodeError::InvalidValue),
-                                       };
-                                       let amount_msat = byte_utils::slice_to_be64(read_bytes!(8));
-                                       let cltv_expiry = byte_utils::slice_to_be32(read_bytes!(4));
-                                       let mut payment_hash = [0; 32];
-                                       payment_hash[..].copy_from_slice(read_bytes!(32));
-                                       let transaction_output_index = byte_utils::slice_to_be32(read_bytes!(4));
+                                       let offered: bool = Readable::read(reader)?;
+                                       let amount_msat: u64 = Readable::read(reader)?;
+                                       let cltv_expiry: u32 = Readable::read(reader)?;
+                                       let payment_hash: [u8; 32] = Readable::read(reader)?;
+                                       let transaction_output_index: u32 = Readable::read(reader)?;
 
                                        HTLCOutputInCommitment {
                                                offered, amount_msat, cltv_expiry, payment_hash, transaction_output_index
@@ -1497,14 +1643,12 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                        }
                }
 
-               let remote_claimable_outpoints_len = byte_utils::slice_to_be64(read_bytes!(8));
-               if remote_claimable_outpoints_len > data.len() as u64 / 64 { return Err(DecodeError::BadLengthDescriptor); }
-               let mut remote_claimable_outpoints = HashMap::with_capacity(remote_claimable_outpoints_len as usize);
+               let remote_claimable_outpoints_len: u64 = Readable::read(reader)?;
+               let mut remote_claimable_outpoints = HashMap::with_capacity(cmp::min(remote_claimable_outpoints_len as usize, MAX_ALLOC_SIZE / 64));
                for _ in 0..remote_claimable_outpoints_len {
-                       let txid = Sha256dHash::from(read_bytes!(32));
-                       let outputs_count = byte_utils::slice_to_be64(read_bytes!(8));
-                       if outputs_count > data.len() as u64 / 32 { return Err(DecodeError::BadLengthDescriptor); }
-                       let mut outputs = Vec::with_capacity(outputs_count as usize);
+                       let txid: Sha256dHash = Readable::read(reader)?;
+                       let outputs_count: u64 = Readable::read(reader)?;
+                       let mut outputs = Vec::with_capacity(cmp::min(outputs_count as usize, MAX_ALLOC_SIZE / 32));
                        for _ in 0..outputs_count {
                                outputs.push(read_htlc_in_commitment!());
                        }
@@ -1513,24 +1657,26 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                        }
                }
 
-               let remote_commitment_txn_on_chain_len = byte_utils::slice_to_be64(read_bytes!(8));
-               if remote_commitment_txn_on_chain_len > data.len() as u64 / 32 { return Err(DecodeError::BadLengthDescriptor); }
-               let mut remote_commitment_txn_on_chain = HashMap::with_capacity(remote_commitment_txn_on_chain_len as usize);
+               let remote_commitment_txn_on_chain_len: u64 = Readable::read(reader)?;
+               let mut remote_commitment_txn_on_chain = HashMap::with_capacity(cmp::min(remote_commitment_txn_on_chain_len as usize, MAX_ALLOC_SIZE / 32));
                for _ in 0..remote_commitment_txn_on_chain_len {
-                       let txid = Sha256dHash::from(read_bytes!(32));
-                       let commitment_number = byte_utils::slice_to_be48(read_bytes!(6));
-                       if let Some(_) = remote_commitment_txn_on_chain.insert(txid, commitment_number) {
+                       let txid: Sha256dHash = Readable::read(reader)?;
+                       let commitment_number = <U48 as Readable<R>>::read(reader)?.0;
+                       let outputs_count = <u64 as Readable<R>>::read(reader)?;
+                       let mut outputs = Vec::with_capacity(cmp::min(outputs_count as usize, MAX_ALLOC_SIZE / 8));
+                       for _ in 0..outputs_count {
+                               outputs.push(Readable::read(reader)?);
+                       }
+                       if let Some(_) = remote_commitment_txn_on_chain.insert(txid, (commitment_number, outputs)) {
                                return Err(DecodeError::InvalidValue);
                        }
                }
 
-               let remote_hash_commitment_number_len = byte_utils::slice_to_be64(read_bytes!(8));
-               if remote_hash_commitment_number_len > data.len() as u64 / 32 { return Err(DecodeError::BadLengthDescriptor); }
-               let mut remote_hash_commitment_number = HashMap::with_capacity(remote_hash_commitment_number_len as usize);
+               let remote_hash_commitment_number_len: u64 = Readable::read(reader)?;
+               let mut remote_hash_commitment_number = HashMap::with_capacity(cmp::min(remote_hash_commitment_number_len as usize, MAX_ALLOC_SIZE / 32));
                for _ in 0..remote_hash_commitment_number_len {
-                       let mut txid = [0; 32];
-                       txid[..].copy_from_slice(read_bytes!(32));
-                       let commitment_number = byte_utils::slice_to_be48(read_bytes!(6));
+                       let txid: [u8; 32] = Readable::read(reader)?;
+                       let commitment_number = <U48 as Readable<R>>::read(reader)?.0;
                        if let Some(_) = remote_hash_commitment_number.insert(txid, commitment_number) {
                                return Err(DecodeError::InvalidValue);
                        }
@@ -1539,29 +1685,29 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                macro_rules! read_local_tx {
                        () => {
                                {
-                                       let tx_len = byte_utils::slice_to_be64(read_bytes!(8));
-                                       let tx_ser = read_bytes!(tx_len);
-                                       let tx: Transaction = unwrap_obj!(serialize::deserialize(tx_ser));
-                                       if serialize::serialize(&tx).unwrap() != tx_ser {
-                                               // We check that the tx re-serializes to the same form to ensure there is
-                                               // no extra data, and as rust-bitcoin doesn't handle the 0-input ambiguity
-                                               // all that well.
+                                       let tx = match Transaction::consensus_decode(reader.by_ref()) {
+                                               Ok(tx) => tx,
+                                               Err(e) => match e {
+                                                       encode::Error::Io(ioe) => return Err(DecodeError::Io(ioe)),
+                                                       _ => return Err(DecodeError::InvalidValue),
+                                               },
+                                       };
+
+                                       if tx.input.is_empty() {
+                                               // Ensure tx didn't hit the 0-input ambiguity case.
                                                return Err(DecodeError::InvalidValue);
                                        }
 
-                                       let revocation_key = unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33)));
-                                       let a_htlc_key = unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33)));
-                                       let b_htlc_key = unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33)));
-                                       let delayed_payment_key = unwrap_obj!(PublicKey::from_slice(&secp_ctx, read_bytes!(33)));
-                                       let feerate_per_kw = byte_utils::slice_to_be64(read_bytes!(8));
+                                       let revocation_key = Readable::read(reader)?;
+                                       let a_htlc_key = Readable::read(reader)?;
+                                       let b_htlc_key = Readable::read(reader)?;
+                                       let delayed_payment_key = Readable::read(reader)?;
+                                       let feerate_per_kw: u64 = Readable::read(reader)?;
 
-                                       let htlc_outputs_len = byte_utils::slice_to_be64(read_bytes!(8));
-                                       if htlc_outputs_len > data.len() as u64 / 128 { return Err(DecodeError::BadLengthDescriptor); }
-                                       let mut htlc_outputs = Vec::with_capacity(htlc_outputs_len as usize);
+                                       let htlc_outputs_len: u64 = Readable::read(reader)?;
+                                       let mut htlc_outputs = Vec::with_capacity(cmp::min(htlc_outputs_len as usize, MAX_ALLOC_SIZE / 128));
                                        for _ in 0..htlc_outputs_len {
-                                               htlc_outputs.push((read_htlc_in_commitment!(),
-                                                               unwrap_obj!(Signature::from_compact(&secp_ctx, read_bytes!(64))),
-                                                               unwrap_obj!(Signature::from_compact(&secp_ctx, read_bytes!(64)))));
+                                               htlc_outputs.push((read_htlc_in_commitment!(), Readable::read(reader)?, Readable::read(reader)?));
                                        }
 
                                        LocalSignedTx {
@@ -1572,7 +1718,7 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                        }
                }
 
-               let prev_local_signed_commitment_tx = match read_bytes!(1)[0] {
+               let prev_local_signed_commitment_tx = match <u8 as Readable<R>>::read(reader)? {
                        0 => None,
                        1 => {
                                Some(read_local_tx!())
@@ -1580,7 +1726,7 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                        _ => return Err(DecodeError::InvalidValue),
                };
 
-               let current_local_signed_commitment_tx = match read_bytes!(1)[0] {
+               let current_local_signed_commitment_tx = match <u8 as Readable<R>>::read(reader)? {
                        0 => None,
                        1 => {
                                Some(read_local_tx!())
@@ -1588,13 +1734,13 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                        _ => return Err(DecodeError::InvalidValue),
                };
 
-               let payment_preimages_len = byte_utils::slice_to_be64(read_bytes!(8));
-               if payment_preimages_len > data.len() as u64 / 32 { return Err(DecodeError::InvalidValue); }
-               let mut payment_preimages = HashMap::with_capacity(payment_preimages_len as usize);
+               let current_remote_commitment_number = <U48 as Readable<R>>::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));
                let mut sha = Sha256::new();
                for _ in 0..payment_preimages_len {
-                       let mut preimage = [0; 32];
-                       preimage[..].copy_from_slice(read_bytes!(32));
+                       let preimage: [u8; 32] = Readable::read(reader)?;
                        sha.reset();
                        sha.input(&preimage);
                        let mut hash = [0; 32];
@@ -1604,10 +1750,10 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
                        }
                }
 
-               let destination_script_len = byte_utils::slice_to_be64(read_bytes!(8));
-               let destination_script = Script::from(read_bytes!(destination_script_len).to_vec());
+               let last_block_hash: Sha256dHash = Readable::read(reader)?;
+               let destination_script = Readable::read(reader)?;
 
-               Ok(ChannelMonitor {
+               Ok((last_block_hash.clone(), ChannelMonitor {
                        funding_txo,
                        commitment_transaction_number_obscure_factor,
 
@@ -1621,17 +1767,20 @@ impl<R: ::std::io::Read> Readable<R> for ChannelMonitor {
 
                        old_secrets,
                        remote_claimable_outpoints,
-                       remote_commitment_txn_on_chain: Mutex::new(remote_commitment_txn_on_chain),
+                       remote_commitment_txn_on_chain,
                        remote_hash_commitment_number,
 
                        prev_local_signed_commitment_tx,
                        current_local_signed_commitment_tx,
+                       current_remote_commitment_number,
 
                        payment_preimages,
 
                        destination_script,
+                       last_block_hash,
                        secp_ctx,
-               })
+                       logger,
+               }))
        }
 
 }
@@ -1645,9 +1794,11 @@ mod tests {
        use ln::channelmonitor::ChannelMonitor;
        use ln::chan_utils::{HTLCOutputInCommitment, TxCreationKeys};
        use util::sha2::Sha256;
+       use util::test_utils::TestLogger;
        use secp256k1::key::{SecretKey,PublicKey};
        use secp256k1::{Secp256k1, Signature};
        use rand::{thread_rng,Rng};
+       use std::sync::Arc;
 
        #[test]
        fn test_per_commitment_storage() {
@@ -1655,6 +1806,7 @@ mod tests {
                let mut secrets: Vec<[u8; 32]> = Vec::new();
                let mut monitor: ChannelMonitor;
                let secp_ctx = Secp256k1::new();
+               let logger = Arc::new(TestLogger::new());
 
                macro_rules! test_secrets {
                        () => {
@@ -1664,341 +1816,341 @@ mod tests {
                                        idx -= 1;
                                }
                                assert_eq!(monitor.get_min_seen_secret(), idx + 1);
-                               assert!(monitor.get_secret(idx).is_err());
+                               assert!(monitor.get_secret(idx).is_none());
                        };
                }
 
                {
                        // insert_secret correct sequence
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
-                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
-                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
-                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
-                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
-                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
-                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
-                       monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
                }
 
                {
                        // insert_secret #1 incorrect
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
-                       assert_eq!(monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap_err().err,
+                       assert_eq!(monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap_err().0,
                                        "Previous secret did not match new one");
                }
 
                {
                        // insert_secret #2 incorrect (#1 derived from incorrect)
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
-                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
-                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
-                       assert_eq!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap_err().err,
+                       assert_eq!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap_err().0,
                                        "Previous secret did not match new one");
                }
 
                {
                        // insert_secret #3 incorrect
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
-                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
-                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
-                       assert_eq!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap_err().err,
+                       assert_eq!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap_err().0,
                                        "Previous secret did not match new one");
                }
 
                {
                        // insert_secret #4 incorrect (1,2,3 derived from incorrect)
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
-                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
-                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("ba65d7b0ef55a3ba300d4e87af29868f394f8f138d78a7011669c79b37b936f4").unwrap());
-                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
-                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
-                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
-                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
-                       assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap_err().err,
+                       assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).unwrap_err().0,
                                        "Previous secret did not match new one");
                }
 
                {
                        // insert_secret #5 incorrect
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
-                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
-                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
-                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
-                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
-                       assert_eq!(monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap_err().err,
+                       assert_eq!(monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap_err().0,
                                        "Previous secret did not match new one");
                }
 
                {
                        // insert_secret #6 incorrect (5 derived from incorrect)
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
-                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
-                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
-                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
-                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("b7e76a83668bde38b373970155c868a653304308f9896692f904a23731224bb1").unwrap());
-                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
-                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
-                       assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap_err().err,
+                       assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).unwrap_err().0,
                                        "Previous secret did not match new one");
                }
 
                {
                        // insert_secret #7 incorrect
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
-                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
-                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
-                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
-                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
-                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("e7971de736e01da8ed58b94c2fc216cb1dca9e326f3a96e7194fe8ea8af6c0a3").unwrap());
-                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
-                       assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap_err().err,
+                       assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).unwrap_err().0,
                                        "Previous secret did not match new one");
                }
 
                {
                        // insert_secret #8 incorrect
-                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+                       monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                        secrets.clear();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
-                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710655, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
-                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710654, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
-                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710653, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
-                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710652, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
-                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710651, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
-                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710650, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
-                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
+                       monitor.provide_secret(281474976710649, secrets.last().unwrap().clone()).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
                        secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a7efbc61aac46d34f77778bac22c8a20c6a46ca460addc49009bda875ec88fa4").unwrap());
-                       assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap_err().err,
+                       assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone()).unwrap_err().0,
                                        "Previous secret did not match new one");
                }
        }
@@ -2006,6 +2158,7 @@ mod tests {
        #[test]
        fn test_prune_preimages() {
                let secp_ctx = Secp256k1::new();
+               let logger = Arc::new(TestLogger::new());
                let dummy_sig = Signature::from_der(&secp_ctx, &hex::decode("3045022100fa86fa9a36a8cd6a7bb8f06a541787d51371d067951a9461d5404de6b928782e02201c8b7c334c10aed8976a3a465be9a28abff4cb23acbf00022295b378ce1fa3cd").unwrap()[..]).unwrap();
 
                macro_rules! dummy_keys {
@@ -2076,7 +2229,7 @@ mod tests {
 
                // Prune with one old state and a local commitment tx holding a few overlaps with the
                // old state.
-               let mut monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), 0, Script::new());
+               let mut monitor = ChannelMonitor::new(&SecretKey::from_slice(&secp_ctx, &[42; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[43; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &SecretKey::from_slice(&secp_ctx, &[44; 32]).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &[45; 32]).unwrap()), 0, Script::new(), logger.clone());
                monitor.set_their_to_self_delay(10);
 
                monitor.provide_latest_local_commitment_tx_info(dummy_tx.clone(), dummy_keys!(), 0, preimages_to_local_htlcs!(preimages[0..10]));
@@ -2091,14 +2244,14 @@ mod tests {
                // Now provide a secret, pruning preimages 10-15
                let mut secret = [0; 32];
                secret[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
-               monitor.provide_secret(281474976710655, secret.clone(), None).unwrap();
+               monitor.provide_secret(281474976710655, secret.clone()).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 15);
                test_preimages_exist!(&preimages[0..10], monitor);
                test_preimages_exist!(&preimages[15..20], monitor);
 
                // Now provide a further secret, pruning preimages 15-17
                secret[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
-               monitor.provide_secret(281474976710654, secret.clone(), None).unwrap();
+               monitor.provide_secret(281474976710654, secret.clone()).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 13);
                test_preimages_exist!(&preimages[0..10], monitor);
                test_preimages_exist!(&preimages[17..20], monitor);
@@ -2107,7 +2260,7 @@ mod tests {
                // previous commitment tx's preimages too
                monitor.provide_latest_local_commitment_tx_info(dummy_tx.clone(), dummy_keys!(), 0, preimages_to_local_htlcs!(preimages[0..5]));
                secret[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
-               monitor.provide_secret(281474976710653, secret.clone(), None).unwrap();
+               monitor.provide_secret(281474976710653, secret.clone()).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 12);
                test_preimages_exist!(&preimages[0..10], monitor);
                test_preimages_exist!(&preimages[18..20], monitor);
@@ -2115,7 +2268,7 @@ mod tests {
                // But if we do it again, we'll prune 5-10
                monitor.provide_latest_local_commitment_tx_info(dummy_tx.clone(), dummy_keys!(), 0, preimages_to_local_htlcs!(preimages[0..3]));
                secret[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
-               monitor.provide_secret(281474976710652, secret.clone(), None).unwrap();
+               monitor.provide_secret(281474976710652, secret.clone()).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 5);
                test_preimages_exist!(&preimages[0..5], monitor);
        }