Add HTLC/extra data in LocalCommitmentTransaction from construction
[rust-lightning] / lightning / src / ln / channelmonitor.rs
index e88dd33395c7ca58f0e1c08c2b66d42cfe458960..3c86d7564d0111d8b0f84d2cfad6e7496bb66bd5 100644 (file)
@@ -290,16 +290,9 @@ impl<Key : Send + cmp::Eq + hash::Hash + 'static, ChanSigner: ChannelKeys, T: De
                        hash_map::Entry::Occupied(_) => return Err(MonitorUpdateError("Channel monitor for given key is already present")),
                        hash_map::Entry::Vacant(e) => e,
                };
-               match monitor.funding_info {
-                       None => {
-                               return Err(MonitorUpdateError("Try to update a useless monitor without funding_txo !"));
-                       },
-                       Some((ref outpoint, ref script)) => {
-                               log_trace!(self, "Got new Channel Monitor for channel {}", log_bytes!(outpoint.to_channel_id()[..]));
-                               self.chain_monitor.install_watch_tx(&outpoint.txid, script);
-                               self.chain_monitor.install_watch_outpoint((outpoint.txid, outpoint.index as u32), script);
-                       },
-               }
+               log_trace!(self, "Got new Channel Monitor for channel {}", log_bytes!(monitor.funding_info.0.to_channel_id()[..]));
+               self.chain_monitor.install_watch_tx(&monitor.funding_info.0.txid, &monitor.funding_info.1);
+               self.chain_monitor.install_watch_outpoint((monitor.funding_info.0.txid, monitor.funding_info.0.index as u32), &monitor.funding_info.1);
                for (txid, outputs) in monitor.get_outputs_to_watch().iter() {
                        for (idx, script) in outputs.iter().enumerate() {
                                self.chain_monitor.install_watch_outpoint((*txid, idx as u32), script);
@@ -560,12 +553,7 @@ const MIN_SERIALIZATION_VERSION: u8 = 1;
 #[derive(Clone)]
 pub(super) enum ChannelMonitorUpdateStep {
        LatestLocalCommitmentTXInfo {
-               // TODO: We really need to not be generating a fully-signed transaction in Channel and
-               // passing it here, we need to hold off so that the ChanSigner can enforce a
-               // only-sign-local-state-for-broadcast once invariant:
                commitment_tx: LocalCommitmentTransaction,
-               local_keys: chan_utils::TxCreationKeys,
-               feerate_per_kw: u64,
                htlc_outputs: Vec<(HTLCOutputInCommitment, Option<Signature>, Option<HTLCSource>)>,
        },
        LatestRemoteCommitmentTXInfo {
@@ -598,11 +586,9 @@ pub(super) enum ChannelMonitorUpdateStep {
 impl Writeable for ChannelMonitorUpdateStep {
        fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
                match self {
-                       &ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { ref commitment_tx, ref local_keys, ref feerate_per_kw, ref htlc_outputs } => {
+                       &ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { ref commitment_tx, ref htlc_outputs } => {
                                0u8.write(w)?;
                                commitment_tx.write(w)?;
-                               local_keys.write(w)?;
-                               feerate_per_kw.write(w)?;
                                (htlc_outputs.len() as u64).write(w)?;
                                for &(ref output, ref signature, ref source) in htlc_outputs.iter() {
                                        output.write(w)?;
@@ -648,8 +634,6 @@ impl Readable for ChannelMonitorUpdateStep {
                        0u8 => {
                                Ok(ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo {
                                        commitment_tx: Readable::read(r)?,
-                                       local_keys: Readable::read(r)?,
-                                       feerate_per_kw: Readable::read(r)?,
                                        htlc_outputs: {
                                                let len: u64 = Readable::read(r)?;
                                                let mut res = Vec::new();
@@ -721,19 +705,19 @@ pub struct ChannelMonitor<ChanSigner: ChannelKeys> {
        shutdown_script: Script,
 
        keys: ChanSigner,
-       funding_info: Option<(OutPoint, Script)>,
+       funding_info: (OutPoint, Script),
        current_remote_commitment_txid: Option<Sha256dHash>,
        prev_remote_commitment_txid: Option<Sha256dHash>,
 
-       their_htlc_base_key: Option<PublicKey>,
-       their_delayed_payment_base_key: Option<PublicKey>,
-       funding_redeemscript: Option<Script>,
-       channel_value_satoshis: Option<u64>,
+       their_htlc_base_key: PublicKey,
+       their_delayed_payment_base_key: PublicKey,
+       funding_redeemscript: Script,
+       channel_value_satoshis: u64,
        // first is the idx of the first of the two revocation points
        their_cur_revocation_points: Option<(u64, PublicKey, Option<PublicKey>)>,
 
        our_to_self_delay: u16,
-       their_to_self_delay: Option<u16>,
+       their_to_self_delay: u16,
 
        commitment_secrets: CounterpartyCommitmentSecrets,
        remote_claimable_outpoints: HashMap<Sha256dHash, Vec<(HTLCOutputInCommitment, Option<Box<HTLCSource>>)>>,
@@ -840,8 +824,14 @@ impl<ChanSigner: ChannelKeys> PartialEq for ChannelMonitor<ChanSigner> {
 }
 
 impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
-       /// 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> {
+       /// 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 disconnecting blocks until you find a common ancestor from both the
+       /// returned block hash and the the current chain and then reconnecting blocks to get to the
+       /// best chain) upon deserializing the object!
+       pub fn write_for_disk<W: Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
                //TODO: We still write out all the serialization here manually instead of using the fancy
                //serialization framework we have, we should migrate things over to it.
                writer.write_all(&[SERIALIZATION_VERSION; 1])?;
@@ -872,23 +862,16 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
                self.shutdown_script.write(writer)?;
 
                self.keys.write(writer)?;
-               match self.funding_info  {
-                       Some((ref outpoint, ref script)) => {
-                               writer.write_all(&outpoint.txid[..])?;
-                               writer.write_all(&byte_utils::be16_to_array(outpoint.index))?;
-                               script.write(writer)?;
-                       },
-                       None => {
-                               debug_assert!(false, "Try to serialize a useless Local monitor !");
-                       },
-               }
+               writer.write_all(&self.funding_info.0.txid[..])?;
+               writer.write_all(&byte_utils::be16_to_array(self.funding_info.0.index))?;
+               self.funding_info.1.write(writer)?;
                self.current_remote_commitment_txid.write(writer)?;
                self.prev_remote_commitment_txid.write(writer)?;
 
-               writer.write_all(&self.their_htlc_base_key.as_ref().unwrap().serialize())?;
-               writer.write_all(&self.their_delayed_payment_base_key.as_ref().unwrap().serialize())?;
-               self.funding_redeemscript.as_ref().unwrap().write(writer)?;
-               self.channel_value_satoshis.unwrap().write(writer)?;
+               writer.write_all(&self.their_htlc_base_key.serialize())?;
+               writer.write_all(&self.their_delayed_payment_base_key.serialize())?;
+               self.funding_redeemscript.write(writer)?;
+               self.channel_value_satoshis.write(writer)?;
 
                match self.their_cur_revocation_points {
                        Some((idx, pubkey, second_option)) => {
@@ -909,7 +892,7 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
                }
 
                writer.write_all(&byte_utils::be16_to_array(self.our_to_self_delay))?;
-               writer.write_all(&byte_utils::be16_to_array(self.their_to_self_delay.unwrap()))?;
+               writer.write_all(&byte_utils::be16_to_array(self.their_to_self_delay))?;
 
                self.commitment_secrets.write(writer)?;
 
@@ -943,14 +926,10 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
                        }
                }
 
-               if for_local_storage {
-                       writer.write_all(&byte_utils::be64_to_array(self.remote_hash_commitment_number.len() as u64))?;
-                       for (ref payment_hash, commitment_number) in self.remote_hash_commitment_number.iter() {
-                               writer.write_all(&payment_hash.0[..])?;
-                               writer.write_all(&byte_utils::be48_to_array(*commitment_number))?;
-                       }
-               } else {
-                       writer.write_all(&byte_utils::be64_to_array(0))?;
+               writer.write_all(&byte_utils::be64_to_array(self.remote_hash_commitment_number.len() as u64))?;
+               for (ref payment_hash, commitment_number) in self.remote_hash_commitment_number.iter() {
+                       writer.write_all(&payment_hash.0[..])?;
+                       writer.write_all(&byte_utils::be48_to_array(*commitment_number))?;
                }
 
                macro_rules! serialize_local_tx {
@@ -991,17 +970,8 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
                        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))?;
-               }
-
-               if for_local_storage {
-                       writer.write_all(&byte_utils::be48_to_array(self.current_local_commitment_number))?;
-               } else {
-                       writer.write_all(&byte_utils::be48_to_array(0))?;
-               }
+               writer.write_all(&byte_utils::be48_to_array(self.current_remote_commitment_number))?;
+               writer.write_all(&byte_utils::be48_to_array(self.current_local_commitment_number))?;
 
                writer.write_all(&byte_utils::be64_to_array(self.payment_preimages.len() as u64))?;
                for payment_preimage in self.payment_preimages.values() {
@@ -1053,28 +1023,6 @@ impl<ChanSigner: ChannelKeys + Writeable> ChannelMonitor<ChanSigner> {
 
                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)
-       }
 }
 
 impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
@@ -1099,18 +1047,18 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                        shutdown_script,
 
                        keys: keys.clone(),
-                       funding_info: Some(funding_info),
+                       funding_info,
                        current_remote_commitment_txid: None,
                        prev_remote_commitment_txid: None,
 
-                       their_htlc_base_key: Some(their_htlc_base_key.clone()),
-                       their_delayed_payment_base_key: Some(their_delayed_payment_base_key.clone()),
-                       funding_redeemscript: Some(funding_redeemscript.clone()),
-                       channel_value_satoshis: Some(channel_value_satoshis),
+                       their_htlc_base_key: their_htlc_base_key.clone(),
+                       their_delayed_payment_base_key: their_delayed_payment_base_key.clone(),
+                       funding_redeemscript: funding_redeemscript.clone(),
+                       channel_value_satoshis: channel_value_satoshis,
                        their_cur_revocation_points: None,
 
-                       our_to_self_delay: our_to_self_delay,
-                       their_to_self_delay: Some(their_to_self_delay),
+                       our_to_self_delay,
+                       their_to_self_delay,
 
                        commitment_secrets: CounterpartyCommitmentSecrets::new(),
                        remote_claimable_outpoints: HashMap::new(),
@@ -1129,7 +1077,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                        onchain_events_waiting_threshold_conf: HashMap::new(),
                        outputs_to_watch: HashMap::new(),
 
-                       onchain_tx_handler: OnchainTxHandler::new(destination_script.clone(), keys, funding_redeemscript, their_to_self_delay, logger.clone()),
+                       onchain_tx_handler: OnchainTxHandler::new(destination_script.clone(), keys, their_to_self_delay, logger.clone()),
 
                        lockdown_from_offchain: false,
 
@@ -1247,20 +1195,20 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
        /// is important that any clones of this channel monitor (including remote clones) by kept
        /// up-to-date as our local commitment transaction is updated.
        /// Panics if set_their_to_self_delay has never been called.
-       pub(super) fn provide_latest_local_commitment_tx_info(&mut self, mut commitment_tx: LocalCommitmentTransaction, local_keys: chan_utils::TxCreationKeys, feerate_per_kw: u64, htlc_outputs: Vec<(HTLCOutputInCommitment, Option<Signature>, Option<HTLCSource>)>) -> Result<(), MonitorUpdateError> {
-               if self.their_to_self_delay.is_none() {
-                       return Err(MonitorUpdateError("Got a local commitment tx info update before we'd set basic information about the channel"));
-               }
+       pub(super) fn provide_latest_local_commitment_tx_info(&mut self, commitment_tx: LocalCommitmentTransaction, htlc_outputs: Vec<(HTLCOutputInCommitment, Option<Signature>, Option<HTLCSource>)>) -> Result<(), MonitorUpdateError> {
                let txid = commitment_tx.txid();
                let sequence = commitment_tx.without_valid_witness().input[0].sequence as u64;
                let locktime = commitment_tx.without_valid_witness().lock_time as u64;
-               let mut htlcs = Vec::with_capacity(htlc_outputs.len());
-               for htlc in htlc_outputs.clone() {
-                       if let Some(_) = htlc.0.transaction_output_index {
-                               htlcs.push((htlc.0, htlc.1, None));
-                       }
-               }
-               commitment_tx.set_htlc_cache(local_keys.clone(), feerate_per_kw, htlcs);
+               let new_local_signed_commitment_tx = LocalSignedTx {
+                       txid,
+                       revocation_key: commitment_tx.local_keys.revocation_key,
+                       a_htlc_key: commitment_tx.local_keys.a_htlc_key,
+                       b_htlc_key: commitment_tx.local_keys.b_htlc_key,
+                       delayed_payment_key: commitment_tx.local_keys.a_delayed_payment_key,
+                       per_commitment_point: commitment_tx.local_keys.per_commitment_point,
+                       feerate_per_kw: commitment_tx.feerate_per_kw,
+                       htlc_outputs: htlc_outputs,
+               };
                // Returning a monitor error before updating tracking points means in case of using
                // a concurrent watchtower implementation for same channel, if this one doesn't
                // reject update as we do, you MAY have the latest local valid commitment tx onchain
@@ -1271,16 +1219,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                }
                self.current_local_commitment_number = 0xffff_ffff_ffff - ((((sequence & 0xffffff) << 3*8) | (locktime as u64 & 0xffffff)) ^ self.commitment_transaction_number_obscure_factor);
                self.prev_local_signed_commitment_tx = self.current_local_signed_commitment_tx.take();
-               self.current_local_signed_commitment_tx = Some(LocalSignedTx {
-                       txid,
-                       revocation_key: local_keys.revocation_key,
-                       a_htlc_key: local_keys.a_htlc_key,
-                       b_htlc_key: local_keys.b_htlc_key,
-                       delayed_payment_key: local_keys.a_delayed_payment_key,
-                       per_commitment_point: local_keys.per_commitment_point,
-                       feerate_per_kw,
-                       htlc_outputs: htlc_outputs,
-               });
+               self.current_local_signed_commitment_tx = Some(new_local_signed_commitment_tx);
                Ok(())
        }
 
@@ -1302,9 +1241,9 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
        pub(super) fn update_monitor_ooo(&mut self, mut updates: ChannelMonitorUpdate) -> Result<(), MonitorUpdateError> {
                for update in updates.updates.drain(..) {
                        match update {
-                               ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { commitment_tx, local_keys, feerate_per_kw, htlc_outputs } => {
+                               ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { commitment_tx, htlc_outputs } => {
                                        if self.lockdown_from_offchain { panic!(); }
-                                       self.provide_latest_local_commitment_tx_info(commitment_tx, local_keys, feerate_per_kw, htlc_outputs)?
+                                       self.provide_latest_local_commitment_tx_info(commitment_tx, htlc_outputs)?
                                },
                                ChannelMonitorUpdateStep::LatestRemoteCommitmentTXInfo { unsigned_commitment_tx, htlc_outputs, commitment_number, their_revocation_point } =>
                                        self.provide_latest_remote_commitment_tx_info(&unsigned_commitment_tx, htlc_outputs, commitment_number, their_revocation_point),
@@ -1333,9 +1272,9 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                }
                for update in updates.updates.drain(..) {
                        match update {
-                               ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { commitment_tx, local_keys, feerate_per_kw, htlc_outputs } => {
+                               ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo { commitment_tx, htlc_outputs } => {
                                        if self.lockdown_from_offchain { panic!(); }
-                                       self.provide_latest_local_commitment_tx_info(commitment_tx, local_keys, feerate_per_kw, htlc_outputs)?
+                                       self.provide_latest_local_commitment_tx_info(commitment_tx, htlc_outputs)?
                                },
                                ChannelMonitorUpdateStep::LatestRemoteCommitmentTXInfo { unsigned_commitment_tx, htlc_outputs, commitment_number, their_revocation_point } =>
                                        self.provide_latest_remote_commitment_tx_info(&unsigned_commitment_tx, htlc_outputs, commitment_number, their_revocation_point),
@@ -1366,11 +1305,8 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
        }
 
        /// Gets the funding transaction outpoint of the channel this ChannelMonitor is monitoring for.
-       pub fn get_funding_txo(&self) -> Option<OutPoint> {
-               if let Some((outp, _)) = self.funding_info {
-                       return Some(outp)
-               }
-               None
+       pub fn get_funding_txo(&self) -> OutPoint {
+               self.funding_info.0
        }
 
        /// Gets a list of txids, with their output scripts (in the order they appear in the
@@ -1463,11 +1399,8 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                        let revocation_key = ignore_error!(chan_utils::derive_private_revocation_key(&self.secp_ctx, &per_commitment_key, &self.keys.revocation_base_key()));
                        let b_htlc_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &per_commitment_point, &self.keys.pubkeys().htlc_basepoint));
                        let local_payment_key = ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, &per_commitment_point, &self.keys.payment_base_key()));
-                       let delayed_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key), &self.their_delayed_payment_base_key.unwrap()));
-                       let a_htlc_key = match self.their_htlc_base_key {
-                               None => return (claimable_outpoints, (commitment_txid, watch_outputs)),
-                               Some(their_htlc_base_key) => ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key), &their_htlc_base_key)),
-                       };
+                       let delayed_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key), &self.their_delayed_payment_base_key));
+                       let a_htlc_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key), &self.their_htlc_base_key));
 
                        let revokeable_redeemscript = chan_utils::get_revokeable_redeemscript(&revocation_pubkey, self.our_to_self_delay, &delayed_key);
                        let revokeable_p2wsh = revokeable_redeemscript.to_v0_p2wsh();
@@ -1618,10 +1551,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                                        let revocation_pubkey = ignore_error!(chan_utils::derive_public_revocation_key(&self.secp_ctx, revocation_point, &self.keys.pubkeys().revocation_basepoint));
                                        let b_htlc_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, revocation_point, &self.keys.pubkeys().htlc_basepoint));
                                        let htlc_privkey = ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, revocation_point, &self.keys.htlc_base_key()));
-                                       let a_htlc_key = match self.their_htlc_base_key {
-                                               None => return (claimable_outpoints, (commitment_txid, watch_outputs)),
-                                               Some(their_htlc_base_key) => ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, revocation_point, &their_htlc_base_key)),
-                                       };
+                                       let a_htlc_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, revocation_point, &self.their_htlc_base_key));
                                        let local_payment_key = ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, revocation_point, &self.keys.payment_base_key()));
 
                                        self.broadcasted_remote_payment_script = {
@@ -1675,10 +1605,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &per_commitment_key);
                let revocation_pubkey = ignore_error!(chan_utils::derive_public_revocation_key(&self.secp_ctx, &per_commitment_point, &self.keys.pubkeys().revocation_basepoint));
                let revocation_key = ignore_error!(chan_utils::derive_private_revocation_key(&self.secp_ctx, &per_commitment_key, &self.keys.revocation_base_key()));
-               let delayed_key = match self.their_delayed_payment_base_key {
-                       None => return (Vec::new(), None),
-                       Some(their_delayed_payment_base_key) => ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &per_commitment_point, &their_delayed_payment_base_key)),
-               };
+               let delayed_key = ignore_error!(chan_utils::derive_public_key(&self.secp_ctx, &per_commitment_point, &self.their_delayed_payment_base_key));
                let redeemscript = chan_utils::get_revokeable_redeemscript(&revocation_pubkey, self.our_to_self_delay, &delayed_key);
 
                log_trace!(self, "Remote HTLC broadcast {}:{}", htlc_txid, 0);
@@ -1691,7 +1618,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                let mut claim_requests = Vec::with_capacity(local_tx.htlc_outputs.len());
                let mut watch_outputs = Vec::with_capacity(local_tx.htlc_outputs.len());
 
-               let redeemscript = chan_utils::get_revokeable_redeemscript(&local_tx.revocation_key, self.their_to_self_delay.unwrap(), &local_tx.delayed_payment_key);
+               let redeemscript = chan_utils::get_revokeable_redeemscript(&local_tx.revocation_key, self.their_to_self_delay, &local_tx.delayed_payment_key);
                let broadcasted_local_revokable_script = if let Ok(local_delayedkey) = chan_utils::derive_private_key(&self.secp_ctx, &local_tx.per_commitment_point, self.keys.delayed_payment_base_key()) {
                        Some((redeemscript.to_v0_p2wsh(), local_delayedkey, redeemscript))
                } else { None };
@@ -1801,7 +1728,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
        /// In any-case, choice is up to the user.
        pub fn get_latest_local_commitment_txn(&mut self) -> Vec<Transaction> {
                log_trace!(self, "Getting signed latest local commitment transaction!");
-               if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_local_tx(self.channel_value_satoshis.unwrap()) {
+               if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_local_tx() {
                        let txid = commitment_tx.txid();
                        let mut res = vec![commitment_tx];
                        if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
@@ -1827,7 +1754,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
        #[cfg(test)]
        pub fn unsafe_get_latest_local_commitment_txn(&mut self) -> Vec<Transaction> {
                log_trace!(self, "Getting signed copy of latest local commitment transaction!");
-               if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_copy_local_tx(self.channel_value_satoshis.unwrap()) {
+               if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_copy_local_tx() {
                        let txid = commitment_tx.txid();
                        let mut res = vec![commitment_tx];
                        if let &Some(ref local_tx) = &self.current_local_signed_commitment_tx {
@@ -1873,8 +1800,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                                // which is an easy way to filter out any potential non-matching txn for lazy
                                // filters.
                                let prevout = &tx.input[0].previous_output;
-                               let funding_txo = self.funding_info.clone();
-                               if funding_txo.is_none() || (prevout.txid == funding_txo.as_ref().unwrap().0.txid && prevout.vout == funding_txo.as_ref().unwrap().0.index as u32) {
+                               if prevout.txid == self.funding_info.0.txid && prevout.vout == self.funding_info.0.index as u32 {
                                        if (tx.input[0].sequence >> 8*3) as u8 == 0x80 && (tx.lock_time >> 8*3) as u8 == 0x20 {
                                                let (mut new_outpoints, new_outputs) = self.check_spend_remote_transaction(&tx, height);
                                                if !new_outputs.1.is_empty() {
@@ -1910,11 +1836,11 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                        self.would_broadcast_at_height(height)
                } else { false };
                if should_broadcast {
-                       claimable_outpoints.push(ClaimRequest { absolute_timelock: height, aggregable: false, outpoint: BitcoinOutPoint { txid: self.funding_info.as_ref().unwrap().0.txid.clone(), vout: self.funding_info.as_ref().unwrap().0.index as u32 }, witness_data: InputMaterial::Funding { channel_value: self.channel_value_satoshis.unwrap() }});
+                       claimable_outpoints.push(ClaimRequest { absolute_timelock: height, aggregable: false, outpoint: BitcoinOutPoint { txid: self.funding_info.0.txid.clone(), vout: self.funding_info.0.index as u32 }, witness_data: InputMaterial::Funding { channel_value: self.channel_value_satoshis }});
                }
                if let Some(ref cur_local_tx) = self.current_local_signed_commitment_tx {
                        if should_broadcast {
-                               if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_local_tx(self.channel_value_satoshis.unwrap()) {
+                               if let Some(commitment_tx) = self.onchain_tx_handler.get_fully_signed_local_tx() {
                                        let (mut new_outpoints, new_outputs, _) = self.broadcast_by_local_state(&commitment_tx, cur_local_tx);
                                        if !new_outputs.is_empty() {
                                                watch_outputs.push((cur_local_tx.txid.clone(), new_outputs));
@@ -2188,7 +2114,7 @@ impl<ChanSigner: ChannelKeys> ChannelMonitor<ChanSigner> {
                                                outpoint: BitcoinOutPoint { txid: tx.txid(), vout: i as u32 },
                                                key: broadcasted_local_revokable_script.1,
                                                witness_script: broadcasted_local_revokable_script.2.clone(),
-                                               to_self_delay: self.their_to_self_delay.unwrap(),
+                                               to_self_delay: self.their_to_self_delay,
                                                output: outp.clone(),
                                        });
                                        break;
@@ -2275,14 +2201,14 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
                        txid: Readable::read(reader)?,
                        index: Readable::read(reader)?,
                };
-               let funding_info = Some((outpoint, Readable::read(reader)?));
+               let funding_info = (outpoint, Readable::read(reader)?);
                let current_remote_commitment_txid = Readable::read(reader)?;
                let prev_remote_commitment_txid = Readable::read(reader)?;
 
-               let their_htlc_base_key = Some(Readable::read(reader)?);
-               let their_delayed_payment_base_key = Some(Readable::read(reader)?);
-               let funding_redeemscript = Some(Readable::read(reader)?);
-               let channel_value_satoshis = Some(Readable::read(reader)?);
+               let their_htlc_base_key = Readable::read(reader)?;
+               let their_delayed_payment_base_key = Readable::read(reader)?;
+               let funding_redeemscript = Readable::read(reader)?;
+               let channel_value_satoshis = Readable::read(reader)?;
 
                let their_cur_revocation_points = {
                        let first_idx = <U48 as Readable>::read(reader)?.0;
@@ -2300,7 +2226,7 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for (Sha256dH
                };
 
                let our_to_self_delay: u16 = Readable::read(reader)?;
-               let their_to_self_delay: Option<u16> = Some(Readable::read(reader)?);
+               let their_to_self_delay: u16 = Readable::read(reader)?;
 
                let commitment_secrets = Readable::read(reader)?;
 
@@ -2549,7 +2475,7 @@ mod tests {
        use ln::channelmonitor::ChannelMonitor;
        use ln::onchaintx::{OnchainTxHandler, InputDescriptors};
        use ln::chan_utils;
-       use ln::chan_utils::{HTLCOutputInCommitment, TxCreationKeys, LocalCommitmentTransaction};
+       use ln::chan_utils::{HTLCOutputInCommitment, LocalCommitmentTransaction};
        use util::test_utils::TestLogger;
        use secp256k1::key::{SecretKey,PublicKey};
        use secp256k1::Secp256k1;
@@ -2563,20 +2489,6 @@ mod tests {
                let logger = Arc::new(TestLogger::new());
 
                let dummy_key = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
-               macro_rules! dummy_keys {
-                       () => {
-                               {
-                                       TxCreationKeys {
-                                               per_commitment_point: dummy_key.clone(),
-                                               revocation_key: dummy_key.clone(),
-                                               a_htlc_key: dummy_key.clone(),
-                                               b_htlc_key: dummy_key.clone(),
-                                               a_delayed_payment_key: dummy_key.clone(),
-                                               b_payment_key: dummy_key.clone(),
-                                       }
-                               }
-                       }
-               }
                let dummy_tx = Transaction { version: 0, lock_time: 0, input: Vec::new(), output: Vec::new() };
 
                let mut preimages = Vec::new();
@@ -2643,11 +2555,9 @@ mod tests {
                        (OutPoint { txid: Sha256dHash::from_slice(&[43; 32]).unwrap(), index: 0 }, Script::new()),
                        &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[44; 32]).unwrap()),
                        &PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[45; 32]).unwrap()),
-                       0, Script::new(), 46, 0, logger.clone());
-
-               monitor.their_to_self_delay = Some(10);
+                       10, Script::new(), 46, 0, logger.clone());
 
-               monitor.provide_latest_local_commitment_tx_info(LocalCommitmentTransaction::dummy(), dummy_keys!(), 0, preimages_to_local_htlcs!(preimages[0..10])).unwrap();
+               monitor.provide_latest_local_commitment_tx_info(LocalCommitmentTransaction::dummy(), preimages_to_local_htlcs!(preimages[0..10])).unwrap();
                monitor.provide_latest_remote_commitment_tx_info(&dummy_tx, preimages_slice_to_htlc_outputs!(preimages[5..15]), 281474976710655, dummy_key);
                monitor.provide_latest_remote_commitment_tx_info(&dummy_tx, preimages_slice_to_htlc_outputs!(preimages[15..20]), 281474976710654, dummy_key);
                monitor.provide_latest_remote_commitment_tx_info(&dummy_tx, preimages_slice_to_htlc_outputs!(preimages[17..20]), 281474976710653, dummy_key);
@@ -2673,7 +2583,7 @@ mod tests {
 
                // Now update local commitment tx info, pruning only element 18 as we still care about the
                // previous commitment tx's preimages too
-               monitor.provide_latest_local_commitment_tx_info(LocalCommitmentTransaction::dummy(), dummy_keys!(), 0, preimages_to_local_htlcs!(preimages[0..5])).unwrap();
+               monitor.provide_latest_local_commitment_tx_info(LocalCommitmentTransaction::dummy(), preimages_to_local_htlcs!(preimages[0..5])).unwrap();
                secret[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
                monitor.provide_secret(281474976710653, secret.clone()).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 12);
@@ -2681,7 +2591,7 @@ mod tests {
                test_preimages_exist!(&preimages[18..20], monitor);
 
                // But if we do it again, we'll prune 5-10
-               monitor.provide_latest_local_commitment_tx_info(LocalCommitmentTransaction::dummy(), dummy_keys!(), 0, preimages_to_local_htlcs!(preimages[0..3])).unwrap();
+               monitor.provide_latest_local_commitment_tx_info(LocalCommitmentTransaction::dummy(), preimages_to_local_htlcs!(preimages[0..3])).unwrap();
                secret[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                monitor.provide_secret(281474976710652, secret.clone()).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 5);