Fix max fee_satoshis constant to be 21 million, not 2.1 million.
[rust-lightning] / lightning / src / ln / channel.rs
index 740f67584deceaad3c2463687a8ccef24520f841..407c9adbce55d8aa094736e545a2f81c5e1b448e 100644 (file)
@@ -1,41 +1,48 @@
+// This file is Copyright its original authors, visible in version control
+// history.
+//
+// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
+// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
+// You may not use this file except in accordance with one or both of these
+// licenses.
+
 use bitcoin::blockdata::block::BlockHeader;
 use bitcoin::blockdata::script::{Script,Builder};
 use bitcoin::blockdata::transaction::{TxIn, TxOut, Transaction, SigHashType};
 use bitcoin::blockdata::opcodes;
-use bitcoin::util::hash::BitcoinHash;
 use bitcoin::util::bip143;
 use bitcoin::consensus::encode;
 
-use bitcoin_hashes::{Hash, HashEngine};
-use bitcoin_hashes::sha256::Hash as Sha256;
-use bitcoin_hashes::hash160::Hash as Hash160;
-use bitcoin_hashes::sha256d::Hash as Sha256dHash;
+use bitcoin::hashes::{Hash, HashEngine};
+use bitcoin::hashes::sha256::Hash as Sha256;
+use bitcoin::hash_types::{Txid, BlockHash, WPubkeyHash};
 
-use secp256k1::key::{PublicKey,SecretKey};
-use secp256k1::{Secp256k1,Signature};
-use secp256k1;
+use bitcoin::secp256k1::key::{PublicKey,SecretKey};
+use bitcoin::secp256k1::{Secp256k1,Signature};
+use bitcoin::secp256k1;
 
 use ln::features::{ChannelFeatures, InitFeatures};
 use ln::msgs;
 use ln::msgs::{DecodeError, OptionalField, DataLossProtect};
-use ln::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateStep, HTLC_FAIL_BACK_BUFFER};
 use ln::channelmanager::{PendingHTLCStatus, HTLCSource, HTLCFailReason, HTLCFailureMsg, PendingHTLCInfo, RAACommitmentOrder, PaymentPreimage, PaymentHash, BREAKDOWN_TIMEOUT, MAX_LOCAL_BREAKDOWN_TIMEOUT};
-use ln::chan_utils::{CounterpartyCommitmentSecrets, LocalCommitmentTransaction, TxCreationKeys, HTLCOutputInCommitment, HTLC_SUCCESS_TX_WEIGHT, HTLC_TIMEOUT_TX_WEIGHT, make_funding_redeemscript, ChannelPublicKeys};
+use ln::chan_utils::{CounterpartyCommitmentSecrets, HolderCommitmentTransaction, TxCreationKeys, HTLCOutputInCommitment, HTLC_SUCCESS_TX_WEIGHT, HTLC_TIMEOUT_TX_WEIGHT, make_funding_redeemscript, ChannelPublicKeys, PreCalculatedTxCreationKeys};
 use ln::chan_utils;
 use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
-use chain::transaction::OutPoint;
+use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateStep, HTLC_FAIL_BACK_BUFFER};
+use chain::transaction::{OutPoint, TransactionData};
 use chain::keysinterface::{ChannelKeys, KeysInterface};
 use util::transaction_utils;
-use util::ser::{Readable, ReadableArgs, Writeable, Writer};
-use util::logger::{Logger, LogHolder};
+use util::ser::{Readable, Writeable, Writer};
+use util::logger::Logger;
 use util::errors::APIError;
 use util::config::{UserConfig,ChannelConfig};
 
 use std;
 use std::default::Default;
 use std::{cmp,mem,fmt};
-use std::sync::{Arc};
 use std::ops::Deref;
+use bitcoin::hashes::hex::ToHex;
 
 #[cfg(test)]
 pub struct ChannelValueStat {
@@ -45,7 +52,8 @@ pub struct ChannelValueStat {
        pub pending_outbound_htlcs_amount_msat: u64,
        pub pending_inbound_htlcs_amount_msat: u64,
        pub holding_cell_outbound_amount_msat: u64,
-       pub their_max_htlc_value_in_flight_msat: u64, // outgoing
+       pub counterparty_max_htlc_value_in_flight_msat: u64, // outgoing
+       pub counterparty_dust_limit_msat: u64,
 }
 
 enum InboundHTLCRemovalReason {
@@ -55,19 +63,43 @@ enum InboundHTLCRemovalReason {
 }
 
 enum InboundHTLCState {
-       /// Added by remote, to be included in next local commitment tx.
+       /// Offered by remote, to be included in next local commitment tx. I.e., the remote sent an
+       /// update_add_htlc message for this HTLC.
        RemoteAnnounced(PendingHTLCStatus),
-       /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
-       /// the remote side hasn't yet revoked their previous state, which we need them to do before we
-       /// accept this HTLC. Implies AwaitingRemoteRevoke.
-       /// We also have not yet included this HTLC in a commitment_signed message, and are waiting on
-       /// a remote revoke_and_ack on a previous state before we can do so.
+       /// Included in a received commitment_signed message (implying we've
+       /// revoke_and_ack'd it), but the remote hasn't yet revoked their previous
+       /// state (see the example below). We have not yet included this HTLC in a
+       /// commitment_signed message because we are waiting on the remote's
+       /// aforementioned state revocation. One reason this missing remote RAA
+       /// (revoke_and_ack) blocks us from constructing a commitment_signed message
+       /// is because every time we create a new "state", i.e. every time we sign a
+       /// new commitment tx (see [BOLT #2]), we need a new per_commitment_point,
+       /// which are provided one-at-a-time in each RAA. E.g., the last RAA they
+       /// sent provided the per_commitment_point for our current commitment tx.
+       /// The other reason we should not send a commitment_signed without their RAA
+       /// is because their RAA serves to ACK our previous commitment_signed.
+       ///
+       /// Here's an example of how an HTLC could come to be in this state:
+       /// remote --> update_add_htlc(prev_htlc)   --> local
+       /// remote --> commitment_signed(prev_htlc) --> local
+       /// remote <-- revoke_and_ack               <-- local
+       /// remote <-- commitment_signed(prev_htlc) <-- local
+       /// [note that here, the remote does not respond with a RAA]
+       /// remote --> update_add_htlc(this_htlc)   --> local
+       /// remote --> commitment_signed(prev_htlc, this_htlc) --> local
+       /// Now `this_htlc` will be assigned this state. It's unable to be officially
+       /// accepted, i.e. included in a commitment_signed, because we're missing the
+       /// RAA that provides our next per_commitment_point. The per_commitment_point
+       /// is used to derive commitment keys, which are used to construct the
+       /// signatures in a commitment_signed message.
+       /// Implies AwaitingRemoteRevoke.
+       /// [BOLT #2]: https://github.com/lightningnetwork/lightning-rfc/blob/master/02-peer-protocol.md
        AwaitingRemoteRevokeToAnnounce(PendingHTLCStatus),
-       /// Included in a received commitment_signed message (implying we've revoke_and_ack'ed it), but
-       /// the remote side hasn't yet revoked their previous state, which we need them to do before we
-       /// accept this HTLC. Implies AwaitingRemoteRevoke.
-       /// We have included this HTLC in our latest commitment_signed and are now just waiting on a
-       /// revoke_and_ack.
+       /// Included in a received commitment_signed message (implying we've revoke_and_ack'd it).
+       /// We have also included this HTLC in our latest commitment_signed and are now just waiting
+       /// on the remote's revoke_and_ack to make this HTLC an irrevocable part of the state of the
+       /// channel (before it can then get forwarded and/or removed).
+       /// Implies AwaitingRemoteRevoke.
        AwaitingAnnouncedRemoteRevoke(PendingHTLCStatus),
        Committed,
        /// Removed by us and a new commitment_signed was sent (if we were AwaitingRemoteRevoke when we
@@ -161,9 +193,9 @@ enum HTLCUpdateAwaitingACK {
 /// move on to ShutdownComplete, at which point most calls into this channel are disallowed.
 enum ChannelState {
        /// Implies we have (or are prepared to) send our open_channel/accept_channel message
-       OurInitSent = (1 << 0),
+       OurInitSent = 1 << 0,
        /// Implies we have received their open_channel/accept_channel message
-       TheirInitSent = (1 << 1),
+       TheirInitSent = 1 << 1,
        /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent.
        /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed
        /// upon receipt of funding_created, so simply skip this state.
@@ -174,35 +206,35 @@ enum ChannelState {
        FundingSent = 8,
        /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message.
        /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
-       TheirFundingLocked = (1 << 4),
+       TheirFundingLocked = 1 << 4,
        /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message.
        /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded.
-       OurFundingLocked = (1 << 5),
+       OurFundingLocked = 1 << 5,
        ChannelFunded = 64,
        /// Flag which is set on ChannelFunded and FundingSent indicating remote side is considered
        /// "disconnected" and no updates are allowed until after we've done a channel_reestablish
        /// dance.
-       PeerDisconnected = (1 << 7),
+       PeerDisconnected = 1 << 7,
        /// Flag which is set on ChannelFunded, FundingCreated, and FundingSent indicating the user has
        /// told us they failed to update our ChannelMonitor somewhere and we should pause sending any
        /// outbound messages until they've managed to do so.
-       MonitorUpdateFailed = (1 << 8),
+       MonitorUpdateFailed = 1 << 8,
        /// Flag which implies that we have sent a commitment_signed but are awaiting the responding
        /// revoke_and_ack message. During this time period, we can't generate new commitment_signed
        /// messages as then we will be unable to determine which HTLCs they included in their
        /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent
        /// later.
        /// Flag is set on ChannelFunded.
-       AwaitingRemoteRevoke = (1 << 9),
+       AwaitingRemoteRevoke = 1 << 9,
        /// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
        /// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
        /// to respond with our own shutdown message when possible.
-       RemoteShutdownSent = (1 << 10),
+       RemoteShutdownSent = 1 << 10,
        /// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
        /// point, we may not add any new HTLCs to the channel.
        /// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
        /// us their shutdown.
-       LocalShutdownSent = (1 << 11),
+       LocalShutdownSent = 1 << 11,
        /// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
        /// to drop us, but we store this anyway.
        ShutdownComplete = 4096,
@@ -230,6 +262,9 @@ enum UpdateStatus {
 // has been completed, and then turn into a Channel to get compiler-time enforcement of things like
 // calling channel_id() before we're set up or things like get_outbound_funding_signed on an
 // inbound channel.
+//
+// Holder designates channel data owned for the benefice of the user client.
+// Counterparty designates channel data owned by the another channel participant entity.
 pub(super) struct Channel<ChanSigner: ChannelKeys> {
        config: ChannelConfig,
 
@@ -244,9 +279,9 @@ pub(super) struct Channel<ChanSigner: ChannelKeys> {
        latest_monitor_update_id: u64,
 
        #[cfg(not(test))]
-       local_keys: ChanSigner,
+       holder_keys: ChanSigner,
        #[cfg(test)]
-       pub(super) local_keys: ChanSigner,
+       pub(super) holder_keys: ChanSigner,
        shutdown_pubkey: PublicKey,
        destination_script: Script,
 
@@ -254,8 +289,8 @@ pub(super) struct Channel<ChanSigner: ChannelKeys> {
        // generation start at 0 and count up...this simplifies some parts of implementation at the
        // cost of others, but should really just be changed.
 
-       cur_local_commitment_transaction_number: u64,
-       cur_remote_commitment_transaction_number: u64,
+       cur_holder_commitment_transaction_number: u64,
+       cur_counterparty_commitment_transaction_number: u64,
        value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees
        pending_inbound_htlcs: Vec<InboundHTLCOutput>,
        pending_outbound_htlcs: Vec<OutboundHTLCOutput>,
@@ -287,25 +322,25 @@ pub(super) struct Channel<ChanSigner: ChannelKeys> {
        // revoke_and_ack is received and new commitment_signed is generated to be
        // sent to the funder. Otherwise, the pending value is removed when receiving
        // commitment_signed.
-       pending_update_fee: Option<u64>,
+       pending_update_fee: Option<u32>,
        // update_fee() during ChannelState::AwaitingRemoteRevoke is hold in
        // holdina_cell_update_fee then moved to pending_udpate_fee when revoke_and_ack
        // is received. holding_cell_update_fee is updated when there are additional
        // update_fee() during ChannelState::AwaitingRemoteRevoke.
-       holding_cell_update_fee: Option<u64>,
-       next_local_htlc_id: u64,
-       next_remote_htlc_id: u64,
+       holding_cell_update_fee: Option<u32>,
+       next_holder_htlc_id: u64,
+       next_counterparty_htlc_id: u64,
        update_time_counter: u32,
-       feerate_per_kw: u64,
+       feerate_per_kw: u32,
 
        #[cfg(debug_assertions)]
        /// Max to_local and to_remote outputs in a locally-generated commitment transaction
-       max_commitment_tx_output_local: ::std::sync::Mutex<(u64, u64)>,
+       holder_max_commitment_tx_output: ::std::sync::Mutex<(u64, u64)>,
        #[cfg(debug_assertions)]
        /// Max to_local and to_remote outputs in a remote-generated commitment transaction
-       max_commitment_tx_output_remote: ::std::sync::Mutex<(u64, u64)>,
+       counterparty_max_commitment_tx_output: ::std::sync::Mutex<(u64, u64)>,
 
-       last_sent_closing_fee: Option<(u64, u64, Signature)>, // (feerate, fee, our_sig)
+       last_sent_closing_fee: Option<(u32, u64, Signature)>, // (feerate, fee, holder_sig)
 
        funding_txo: Option<OutPoint>,
 
@@ -313,54 +348,49 @@ pub(super) struct Channel<ChanSigner: ChannelKeys> {
        /// to detect unconfirmation after a serialize-unserialize roundtrip where we may not see a full
        /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
        /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
-       funding_tx_confirmed_in: Option<Sha256dHash>,
+       funding_tx_confirmed_in: Option<BlockHash>,
        short_channel_id: Option<u64>,
        /// Used to deduplicate block_connected callbacks, also used to verify consistency during
        /// ChannelManager deserialization (hence pub(super))
-       pub(super) last_block_connected: Sha256dHash,
+       pub(super) last_block_connected: BlockHash,
        funding_tx_confirmations: u64,
 
-       their_dust_limit_satoshis: u64,
+       counterparty_dust_limit_satoshis: u64,
        #[cfg(test)]
-       pub(super) our_dust_limit_satoshis: u64,
+       pub(super) holder_dust_limit_satoshis: u64,
        #[cfg(not(test))]
-       our_dust_limit_satoshis: u64,
+       holder_dust_limit_satoshis: u64,
        #[cfg(test)]
-       pub(super) their_max_htlc_value_in_flight_msat: u64,
+       pub(super) counterparty_max_htlc_value_in_flight_msat: u64,
        #[cfg(not(test))]
-       their_max_htlc_value_in_flight_msat: u64,
-       //get_our_max_htlc_value_in_flight_msat(): u64,
-       /// minimum channel reserve for **self** to maintain - set by them.
-       their_channel_reserve_satoshis: u64,
-       //get_our_channel_reserve_satoshis(): u64,
-       their_htlc_minimum_msat: u64,
-       our_htlc_minimum_msat: u64,
-       their_to_self_delay: u16,
-       our_to_self_delay: u16,
+       counterparty_max_htlc_value_in_flight_msat: u64,
+       //get_holder_max_htlc_value_in_flight_msat(): u64,
+       /// minimum channel reserve for self to maintain - set by them.
+       counterparty_selected_channel_reserve_satoshis: u64,
+       // get_holder_selected_channel_reserve_satoshis(channel_value_sats: u64): u64
+       counterparty_htlc_minimum_msat: u64,
+       holder_htlc_minimum_msat: u64,
+       counterparty_selected_contest_delay: u16,
+       holder_selected_contest_delay: u16,
        #[cfg(test)]
-       pub their_max_accepted_htlcs: u16,
+       pub counterparty_max_accepted_htlcs: u16,
        #[cfg(not(test))]
-       their_max_accepted_htlcs: u16,
-       //implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16,
+       counterparty_max_accepted_htlcs: u16,
+       //implied by OUR_MAX_HTLCS: max_accepted_htlcs: u16,
        minimum_depth: u32,
 
-       their_pubkeys: Option<ChannelPublicKeys>,
+       counterparty_pubkeys: Option<ChannelPublicKeys>,
 
-       their_cur_commitment_point: Option<PublicKey>,
+       counterparty_cur_commitment_point: Option<PublicKey>,
 
-       their_prev_commitment_point: Option<PublicKey>,
-       their_node_id: PublicKey,
+       counterparty_prev_commitment_point: Option<PublicKey>,
+       counterparty_node_id: PublicKey,
 
-       their_shutdown_scriptpubkey: Option<Script>,
+       counterparty_shutdown_scriptpubkey: Option<Script>,
 
-       /// Used exclusively to broadcast the latest local state, mostly a historical quirk that this
-       /// is here:
-       channel_monitor: Option<ChannelMonitor<ChanSigner>>,
        commitment_secrets: CounterpartyCommitmentSecrets,
 
        network_sync: UpdateStatus,
-
-       logger: Arc<Logger>,
 }
 
 pub const OUR_MAX_HTLCS: u16 = 50; //TODO
@@ -388,20 +418,17 @@ pub const MAX_FUNDING_SATOSHIS: u64 = 1 << 24;
 /// msgs::ErrorAction::SendErrorMessage or msgs::ErrorAction::IgnoreError as appropriate with our
 /// channel_id in ChannelManager.
 pub(super) enum ChannelError {
-       Ignore(&'static str),
-       Close(&'static str),
-       CloseDelayBroadcast {
-               msg: &'static str,
-               update: ChannelMonitorUpdate,
-       },
+       Ignore(String),
+       Close(String),
+       CloseDelayBroadcast(String),
 }
 
 impl fmt::Debug for ChannelError {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
                match self {
-                       &ChannelError::Ignore(e) => write!(f, "Ignore : {}", e),
-                       &ChannelError::Close(e) => write!(f, "Close : {}", e),
-                       &ChannelError::CloseDelayBroadcast { msg, .. } => write!(f, "CloseDelayBroadcast : {}", msg)
+                       &ChannelError::Ignore(ref e) => write!(f, "Ignore : {}", e),
+                       &ChannelError::Close(ref e) => write!(f, "Close : {}", e),
+                       &ChannelError::CloseDelayBroadcast(ref e) => write!(f, "CloseDelayBroadcast : {}", e)
                }
        }
 }
@@ -417,43 +444,43 @@ macro_rules! secp_check {
 
 impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        // Convert constants + channel value to limits:
-       fn get_our_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
+       fn get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 {
                channel_value_satoshis * 1000 / 10 //TODO
        }
 
-       /// Returns a minimum channel reserve value **they** need to maintain
+       /// Returns a minimum channel reserve value the remote needs to maintain,
+       /// required by us.
        ///
        /// Guaranteed to return a value no larger than channel_value_satoshis
-       pub(crate) fn get_our_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
+       pub(crate) fn get_holder_selected_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 {
                let (q, _) = channel_value_satoshis.overflowing_div(100);
                cmp::min(channel_value_satoshis, cmp::max(q, 1000)) //TODO
        }
 
-       fn derive_our_dust_limit_satoshis(at_open_background_feerate: u64) -> u64 {
-               cmp::max(at_open_background_feerate * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000, 546) //TODO
+       fn derive_holder_dust_limit_satoshis(at_open_background_feerate: u32) -> u64 {
+               cmp::max(at_open_background_feerate as u64 * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT / 1000, 546) //TODO
        }
 
        // Constructors:
-       pub fn new_outbound<K: Deref, F: Deref>(fee_estimator: &F, keys_provider: &K, their_node_id: PublicKey, channel_value_satoshis: u64, push_msat: u64, user_id: u64, logger: Arc<Logger>, config: &UserConfig) -> Result<Channel<ChanSigner>, APIError>
+       pub fn new_outbound<K: Deref, F: Deref>(fee_estimator: &F, keys_provider: &K, counterparty_node_id: PublicKey, channel_value_satoshis: u64, push_msat: u64, user_id: u64, config: &UserConfig) -> Result<Channel<ChanSigner>, APIError>
        where K::Target: KeysInterface<ChanKeySigner = ChanSigner>,
              F::Target: FeeEstimator,
        {
+               let holder_selected_contest_delay = config.own_channel_config.our_to_self_delay;
                let chan_keys = keys_provider.get_channel_keys(false, channel_value_satoshis);
 
                if channel_value_satoshis >= MAX_FUNDING_SATOSHIS {
-                       return Err(APIError::APIMisuseError{err: "funding value > 2^24"});
+                       return Err(APIError::APIMisuseError{err: format!("funding_value must be smaller than {}, it was {}", MAX_FUNDING_SATOSHIS, channel_value_satoshis)});
                }
-
-               if push_msat > channel_value_satoshis * 1000 {
-                       return Err(APIError::APIMisuseError{err: "push value > channel value"});
+               let channel_value_msat = channel_value_satoshis * 1000;
+               if push_msat > channel_value_msat {
+                       return Err(APIError::APIMisuseError { err: format!("Push value ({}) was larger than channel_value ({})", push_msat, channel_value_msat) });
                }
-               if config.own_channel_config.our_to_self_delay < BREAKDOWN_TIMEOUT {
-                       return Err(APIError::APIMisuseError{err: "Configured with an unreasonable our_to_self_delay putting user funds at risks"});
+               if holder_selected_contest_delay < BREAKDOWN_TIMEOUT {
+                       return Err(APIError::APIMisuseError {err: format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks", holder_selected_contest_delay)});
                }
-
-
                let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
-               if Channel::<ChanSigner>::get_our_channel_reserve_satoshis(channel_value_satoshis) < Channel::<ChanSigner>::derive_our_dust_limit_satoshis(background_feerate) {
+               if Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(channel_value_satoshis) < Channel::<ChanSigner>::derive_holder_dust_limit_satoshis(background_feerate) {
                        return Err(APIError::FeeRateTooHigh{err: format!("Not enough reserve above dust limit can be found at current fee rate({})", background_feerate), feerate: background_feerate});
                }
 
@@ -463,7 +490,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        user_id: user_id,
                        config: config.channel_options.clone(),
 
-                       channel_id: keys_provider.get_channel_id(),
+                       channel_id: keys_provider.get_secure_random_bytes(),
                        channel_state: ChannelState::OurInitSent as u32,
                        channel_outbound: true,
                        secp_ctx: Secp256k1::new(),
@@ -471,12 +498,12 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
                        latest_monitor_update_id: 0,
 
-                       local_keys: chan_keys,
+                       holder_keys: chan_keys,
                        shutdown_pubkey: keys_provider.get_shutdown_pubkey(),
                        destination_script: keys_provider.get_destination_script(),
 
-                       cur_local_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
-                       cur_remote_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
+                       cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
+                       cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
                        value_to_self_msat: channel_value_satoshis * 1000 - push_msat,
 
                        pending_inbound_htlcs: Vec::new(),
@@ -484,8 +511,8 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        holding_cell_htlc_updates: Vec::new(),
                        pending_update_fee: None,
                        holding_cell_update_fee: None,
-                       next_local_htlc_id: 0,
-                       next_remote_htlc_id: 0,
+                       next_holder_htlc_id: 0,
+                       next_counterparty_htlc_id: 0,
                        update_time_counter: 1,
 
                        resend_order: RAACommitmentOrder::CommitmentFirst,
@@ -497,9 +524,9 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        monitor_pending_failures: Vec::new(),
 
                        #[cfg(debug_assertions)]
-                       max_commitment_tx_output_local: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
+                       holder_max_commitment_tx_output: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
                        #[cfg(debug_assertions)]
-                       max_commitment_tx_output_remote: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
+                       counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
 
                        last_sent_closing_fee: None,
 
@@ -510,160 +537,163 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        funding_tx_confirmations: 0,
 
                        feerate_per_kw: feerate,
-                       their_dust_limit_satoshis: 0,
-                       our_dust_limit_satoshis: Channel::<ChanSigner>::derive_our_dust_limit_satoshis(background_feerate),
-                       their_max_htlc_value_in_flight_msat: 0,
-                       their_channel_reserve_satoshis: 0,
-                       their_htlc_minimum_msat: 0,
-                       our_htlc_minimum_msat: if config.own_channel_config.our_htlc_minimum_msat == 0 { 1 } else { config.own_channel_config.our_htlc_minimum_msat },
-                       their_to_self_delay: 0,
-                       our_to_self_delay: config.own_channel_config.our_to_self_delay,
-                       their_max_accepted_htlcs: 0,
+                       counterparty_dust_limit_satoshis: 0,
+                       holder_dust_limit_satoshis: Channel::<ChanSigner>::derive_holder_dust_limit_satoshis(background_feerate),
+                       counterparty_max_htlc_value_in_flight_msat: 0,
+                       counterparty_selected_channel_reserve_satoshis: 0,
+                       counterparty_htlc_minimum_msat: 0,
+                       holder_htlc_minimum_msat: if config.own_channel_config.our_htlc_minimum_msat == 0 { 1 } else { config.own_channel_config.our_htlc_minimum_msat },
+                       counterparty_selected_contest_delay: 0,
+                       holder_selected_contest_delay,
+                       counterparty_max_accepted_htlcs: 0,
                        minimum_depth: 0, // Filled in in accept_channel
 
-                       their_pubkeys: None,
-                       their_cur_commitment_point: None,
+                       counterparty_pubkeys: None,
+                       counterparty_cur_commitment_point: None,
 
-                       their_prev_commitment_point: None,
-                       their_node_id: their_node_id,
+                       counterparty_prev_commitment_point: None,
+                       counterparty_node_id,
 
-                       their_shutdown_scriptpubkey: None,
+                       counterparty_shutdown_scriptpubkey: None,
 
-                       channel_monitor: None,
                        commitment_secrets: CounterpartyCommitmentSecrets::new(),
 
                        network_sync: UpdateStatus::Fresh,
-
-                       logger,
                })
        }
 
        fn check_remote_fee<F: Deref>(fee_estimator: &F, feerate_per_kw: u32) -> Result<(), ChannelError>
                where F::Target: FeeEstimator
        {
-               if (feerate_per_kw as u64) < fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) {
-                       return Err(ChannelError::Close("Peer's feerate much too low"));
+               let lower_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
+               if feerate_per_kw < lower_limit {
+                       return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {}", feerate_per_kw, lower_limit)));
                }
-               if (feerate_per_kw as u64) > fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * 2 {
-                       return Err(ChannelError::Close("Peer's feerate much too high"));
+               let upper_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) as u64  * 2;
+               if feerate_per_kw as u64 > upper_limit {
+                       return Err(ChannelError::Close(format!("Peer's feerate much too high. Actual: {}. Our expected upper limit: {}", feerate_per_kw, upper_limit)));
                }
                Ok(())
        }
 
        /// Creates a new channel from a remote sides' request for one.
        /// Assumes chain_hash has already been checked and corresponds with what we expect!
-       pub fn new_from_req<K: Deref, F: Deref>(fee_estimator: &F, keys_provider: &K, their_node_id: PublicKey, their_features: InitFeatures, msg: &msgs::OpenChannel, user_id: u64, logger: Arc<Logger>, config: &UserConfig) -> Result<Channel<ChanSigner>, ChannelError>
+       pub fn new_from_req<K: Deref, F: Deref>(fee_estimator: &F, keys_provider: &K, counterparty_node_id: PublicKey, their_features: InitFeatures, msg: &msgs::OpenChannel, user_id: u64, config: &UserConfig) -> Result<Channel<ChanSigner>, ChannelError>
                where K::Target: KeysInterface<ChanKeySigner = ChanSigner>,
           F::Target: FeeEstimator
        {
                let mut chan_keys = keys_provider.get_channel_keys(true, msg.funding_satoshis);
-               let their_pubkeys = ChannelPublicKeys {
+               let counterparty_pubkeys = ChannelPublicKeys {
                        funding_pubkey: msg.funding_pubkey,
                        revocation_basepoint: msg.revocation_basepoint,
-                       payment_basepoint: msg.payment_basepoint,
+                       payment_point: msg.payment_point,
                        delayed_payment_basepoint: msg.delayed_payment_basepoint,
                        htlc_basepoint: msg.htlc_basepoint
                };
-               chan_keys.set_remote_channel_pubkeys(&their_pubkeys);
+               chan_keys.on_accept(&counterparty_pubkeys, msg.to_self_delay, config.own_channel_config.our_to_self_delay);
                let mut local_config = (*config).channel_options.clone();
 
                if config.own_channel_config.our_to_self_delay < BREAKDOWN_TIMEOUT {
-                       return Err(ChannelError::Close("Configured with an unreasonable our_to_self_delay putting user funds at risks"));
+                       return Err(ChannelError::Close(format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks. It must be greater than {}", config.own_channel_config.our_to_self_delay, BREAKDOWN_TIMEOUT)));
                }
 
                // Check sanity of message fields:
                if msg.funding_satoshis >= MAX_FUNDING_SATOSHIS {
-                       return Err(ChannelError::Close("funding value > 2^24"));
+                       return Err(ChannelError::Close(format!("Funding must be smaller than {}. It was {}", MAX_FUNDING_SATOSHIS, msg.funding_satoshis)));
                }
                if msg.channel_reserve_satoshis > msg.funding_satoshis {
-                       return Err(ChannelError::Close("Bogus channel_reserve_satoshis"));
+                       return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must be not greater than funding_satoshis: {}", msg.channel_reserve_satoshis, msg.funding_satoshis)));
                }
-               if msg.push_msat > (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
-                       return Err(ChannelError::Close("push_msat larger than funding value"));
+               let funding_value = (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000;
+               if msg.push_msat > funding_value {
+                       return Err(ChannelError::Close(format!("push_msat {} was larger than funding value {}", msg.push_msat, funding_value)));
                }
                if msg.dust_limit_satoshis > msg.funding_satoshis {
-                       return Err(ChannelError::Close("Peer never wants payout outputs?"));
+                       return Err(ChannelError::Close(format!("dust_limit_satoshis {} was larger than funding_satoshis {}. Peer never wants payout outputs?", msg.dust_limit_satoshis, msg.funding_satoshis)));
                }
                if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
-                       return Err(ChannelError::Close("Bogus; channel reserve is less than dust limit"));
+                       return Err(ChannelError::Close(format!("Bogus; channel reserve ({}) is less than dust limit ({})", msg.channel_reserve_satoshis, msg.dust_limit_satoshis)));
                }
-               if msg.htlc_minimum_msat >= (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 {
-                       return Err(ChannelError::Close("Minimum htlc value is full channel value"));
+               let full_channel_value_msat = (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000;
+               if msg.htlc_minimum_msat >= full_channel_value_msat {
+                       return Err(ChannelError::Close(format!("Minimum htlc value ({}) was larger than full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
                }
                Channel::<ChanSigner>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
 
-               if msg.to_self_delay > config.peer_channel_config_limits.their_to_self_delay || msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
-                       return Err(ChannelError::Close("They wanted our payments to be delayed by a needlessly long period"));
+               let max_counterparty_selected_contest_delay = u16::min(config.peer_channel_config_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
+               if msg.to_self_delay > max_counterparty_selected_contest_delay {
+                       return Err(ChannelError::Close(format!("They wanted our payments to be delayed by a needlessly long period. Upper limit: {}. Actual: {}", max_counterparty_selected_contest_delay, msg.to_self_delay)));
                }
                if msg.max_accepted_htlcs < 1 {
-                       return Err(ChannelError::Close("0 max_accpted_htlcs makes for a useless channel"));
+                       return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
                }
                if msg.max_accepted_htlcs > 483 {
-                       return Err(ChannelError::Close("max_accpted_htlcs > 483"));
+                       return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than 483", msg.max_accepted_htlcs)));
                }
 
                // Now check against optional parameters as set by config...
                if msg.funding_satoshis < config.peer_channel_config_limits.min_funding_satoshis {
-                       return Err(ChannelError::Close("funding satoshis is less than the user specified limit"));
+                       return Err(ChannelError::Close(format!("Funding satoshis ({}) is less than the user specified limit ({})", msg.funding_satoshis, config.peer_channel_config_limits.min_funding_satoshis)));
                }
                if msg.htlc_minimum_msat > config.peer_channel_config_limits.max_htlc_minimum_msat {
-                       return Err(ChannelError::Close("htlc minimum msat is higher than the user specified limit"));
+                       return Err(ChannelError::Close(format!("htlc_minimum_msat ({}) is higher than the user specified limit ({})", msg.htlc_minimum_msat,  config.peer_channel_config_limits.max_htlc_minimum_msat)));
                }
                if msg.max_htlc_value_in_flight_msat < config.peer_channel_config_limits.min_max_htlc_value_in_flight_msat {
-                       return Err(ChannelError::Close("max htlc value in flight msat is less than the user specified limit"));
+                       return Err(ChannelError::Close(format!("max_htlc_value_in_flight_msat ({}) is less than the user specified limit ({})", msg.max_htlc_value_in_flight_msat, config.peer_channel_config_limits.min_max_htlc_value_in_flight_msat)));
                }
                if msg.channel_reserve_satoshis > config.peer_channel_config_limits.max_channel_reserve_satoshis {
-                       return Err(ChannelError::Close("channel reserve satoshis is higher than the user specified limit"));
+                       return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is higher than the user specified limit ({})", msg.channel_reserve_satoshis, config.peer_channel_config_limits.max_channel_reserve_satoshis)));
                }
                if msg.max_accepted_htlcs < config.peer_channel_config_limits.min_max_accepted_htlcs {
-                       return Err(ChannelError::Close("max accepted htlcs is less than the user specified limit"));
+                       return Err(ChannelError::Close(format!("max_accepted_htlcs ({}) is less than the user specified limit ({})", msg.max_accepted_htlcs, config.peer_channel_config_limits.min_max_accepted_htlcs)));
                }
                if msg.dust_limit_satoshis < config.peer_channel_config_limits.min_dust_limit_satoshis {
-                       return Err(ChannelError::Close("dust limit satoshis is less than the user specified limit"));
+                       return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the user specified limit ({})", msg.dust_limit_satoshis, config.peer_channel_config_limits.min_dust_limit_satoshis)));
                }
                if msg.dust_limit_satoshis > config.peer_channel_config_limits.max_dust_limit_satoshis {
-                       return Err(ChannelError::Close("dust limit satoshis is greater than the user specified limit"));
+                       return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the user specified limit ({})", msg.dust_limit_satoshis, config.peer_channel_config_limits.max_dust_limit_satoshis)));
                }
 
                // Convert things into internal flags and prep our state:
 
-               let their_announce = if (msg.channel_flags & 1) == 1 { true } else { false };
+               let announce = if (msg.channel_flags & 1) == 1 { true } else { false };
                if config.peer_channel_config_limits.force_announced_channel_preference {
-                       if local_config.announced_channel != their_announce {
-                               return Err(ChannelError::Close("Peer tried to open channel but their announcement preference is different from ours"));
+                       if local_config.announced_channel != announce {
+                               return Err(ChannelError::Close("Peer tried to open channel but their announcement preference is different from ours".to_owned()));
                        }
                }
                // we either accept their preference or the preferences match
-               local_config.announced_channel = their_announce;
+               local_config.announced_channel = announce;
 
                let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
 
-               let our_dust_limit_satoshis = Channel::<ChanSigner>::derive_our_dust_limit_satoshis(background_feerate);
-               let our_channel_reserve_satoshis = Channel::<ChanSigner>::get_our_channel_reserve_satoshis(msg.funding_satoshis);
-               if our_channel_reserve_satoshis < our_dust_limit_satoshis {
-                       return Err(ChannelError::Close("Suitable channel reserve not found. aborting"));
+               let holder_dust_limit_satoshis = Channel::<ChanSigner>::derive_holder_dust_limit_satoshis(background_feerate);
+               let holder_selected_channel_reserve_satoshis = Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(msg.funding_satoshis);
+               if holder_selected_channel_reserve_satoshis < holder_dust_limit_satoshis {
+                       return Err(ChannelError::Close(format!("Suitable channel reserve not found. remote_channel_reserve was ({}). dust_limit_satoshis is ({}).", holder_selected_channel_reserve_satoshis, holder_dust_limit_satoshis)));
                }
-               if msg.channel_reserve_satoshis < our_dust_limit_satoshis {
-                       return Err(ChannelError::Close("channel_reserve_satoshis too small"));
+               if msg.channel_reserve_satoshis < holder_dust_limit_satoshis {
+                       return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is smaller than our dust limit ({})", msg.channel_reserve_satoshis, holder_dust_limit_satoshis)));
                }
-               if our_channel_reserve_satoshis < msg.dust_limit_satoshis {
-                       return Err(ChannelError::Close("Dust limit too high for our channel reserve"));
+               if holder_selected_channel_reserve_satoshis < msg.dust_limit_satoshis {
+                       return Err(ChannelError::Close(format!("Dust limit ({}) too high for the channel reserve we require the remote to keep ({})", msg.dust_limit_satoshis, holder_selected_channel_reserve_satoshis)));
                }
 
                // check if the funder's amount for the initial commitment tx is sufficient
                // for full fee payment
                let funders_amount_msat = msg.funding_satoshis * 1000 - msg.push_msat;
-               if funders_amount_msat < background_feerate * COMMITMENT_TX_BASE_WEIGHT {
-                       return Err(ChannelError::Close("Insufficient funding amount for initial commitment"));
+               let lower_limit = background_feerate as u64 * COMMITMENT_TX_BASE_WEIGHT;
+               if funders_amount_msat < lower_limit {
+                       return Err(ChannelError::Close(format!("Insufficient funding amount ({}) for initial commitment. Must be at least {}", funders_amount_msat, lower_limit)));
                }
 
                let to_local_msat = msg.push_msat;
-               let to_remote_msat = funders_amount_msat - background_feerate * COMMITMENT_TX_BASE_WEIGHT;
-               if to_local_msat <= msg.channel_reserve_satoshis * 1000 && to_remote_msat <= our_channel_reserve_satoshis * 1000 {
-                       return Err(ChannelError::Close("Insufficient funding amount for initial commitment"));
+               let to_remote_msat = funders_amount_msat - background_feerate as u64 * COMMITMENT_TX_BASE_WEIGHT;
+               if to_local_msat <= msg.channel_reserve_satoshis * 1000 && to_remote_msat <= holder_selected_channel_reserve_satoshis * 1000 {
+                       return Err(ChannelError::Close("Insufficient funding amount for initial commitment".to_owned()));
                }
 
-               let their_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
+               let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
                        match &msg.shutdown_scriptpubkey {
                                &OptionalField::Present(ref script) => {
                                        // Peer is signaling upfront_shutdown and has provided a non-accepted scriptpubkey format. We enforce it while receiving shutdown msg
@@ -674,12 +704,12 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                                None
                                        // Peer is signaling upfront_shutdown and has provided a non-accepted scriptpubkey format. Fail the channel
                                        } else {
-                                               return Err(ChannelError::Close("Peer is signaling upfront_shutdown but has provided a non-accepted scriptpubkey format"));
+                                               return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided a non-accepted scriptpubkey format. script: ({})", script.to_bytes().to_hex())));
                                        }
                                },
                                // Peer is signaling upfront shutdown but don't opt-out with correct mechanism (a.k.a 0-length script). Peer looks buggy, we fail the channel
                                &OptionalField::Absent => {
-                                       return Err(ChannelError::Close("Peer is signaling upfront_shutdown but we don't get any script. Use 0-length script to opt-out"));
+                                       return Err(ChannelError::Close("Peer is signaling upfront_shutdown but we don't get any script. Use 0-length script to opt-out".to_owned()));
                                }
                        }
                } else { None };
@@ -695,12 +725,12 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
                        latest_monitor_update_id: 0,
 
-                       local_keys: chan_keys,
+                       holder_keys: chan_keys,
                        shutdown_pubkey: keys_provider.get_shutdown_pubkey(),
                        destination_script: keys_provider.get_destination_script(),
 
-                       cur_local_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
-                       cur_remote_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
+                       cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
+                       cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
                        value_to_self_msat: msg.push_msat,
 
                        pending_inbound_htlcs: Vec::new(),
@@ -708,8 +738,8 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        holding_cell_htlc_updates: Vec::new(),
                        pending_update_fee: None,
                        holding_cell_update_fee: None,
-                       next_local_htlc_id: 0,
-                       next_remote_htlc_id: 0,
+                       next_holder_htlc_id: 0,
+                       next_counterparty_htlc_id: 0,
                        update_time_counter: 1,
 
                        resend_order: RAACommitmentOrder::CommitmentFirst,
@@ -721,9 +751,9 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        monitor_pending_failures: Vec::new(),
 
                        #[cfg(debug_assertions)]
-                       max_commitment_tx_output_local: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
+                       holder_max_commitment_tx_output: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
                        #[cfg(debug_assertions)]
-                       max_commitment_tx_output_remote: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
+                       counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((msg.push_msat, msg.funding_satoshis * 1000 - msg.push_msat)),
 
                        last_sent_closing_fee: None,
 
@@ -733,58 +763,47 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        last_block_connected: Default::default(),
                        funding_tx_confirmations: 0,
 
-                       feerate_per_kw: msg.feerate_per_kw as u64,
+                       feerate_per_kw: msg.feerate_per_kw,
                        channel_value_satoshis: msg.funding_satoshis,
-                       their_dust_limit_satoshis: msg.dust_limit_satoshis,
-                       our_dust_limit_satoshis: our_dust_limit_satoshis,
-                       their_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
-                       their_channel_reserve_satoshis: msg.channel_reserve_satoshis,
-                       their_htlc_minimum_msat: msg.htlc_minimum_msat,
-                       our_htlc_minimum_msat: if config.own_channel_config.our_htlc_minimum_msat == 0 { 1 } else { config.own_channel_config.our_htlc_minimum_msat },
-                       their_to_self_delay: msg.to_self_delay,
-                       our_to_self_delay: config.own_channel_config.our_to_self_delay,
-                       their_max_accepted_htlcs: msg.max_accepted_htlcs,
+                       counterparty_dust_limit_satoshis: msg.dust_limit_satoshis,
+                       holder_dust_limit_satoshis: holder_dust_limit_satoshis,
+                       counterparty_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
+                       counterparty_selected_channel_reserve_satoshis: msg.channel_reserve_satoshis,
+                       counterparty_htlc_minimum_msat: msg.htlc_minimum_msat,
+                       holder_htlc_minimum_msat: if config.own_channel_config.our_htlc_minimum_msat == 0 { 1 } else { config.own_channel_config.our_htlc_minimum_msat },
+                       counterparty_selected_contest_delay: msg.to_self_delay,
+                       holder_selected_contest_delay: config.own_channel_config.our_to_self_delay,
+                       counterparty_max_accepted_htlcs: msg.max_accepted_htlcs,
                        minimum_depth: config.own_channel_config.minimum_depth,
 
-                       their_pubkeys: Some(their_pubkeys),
-                       their_cur_commitment_point: Some(msg.first_per_commitment_point),
+                       counterparty_pubkeys: Some(counterparty_pubkeys),
+                       counterparty_cur_commitment_point: Some(msg.first_per_commitment_point),
 
-                       their_prev_commitment_point: None,
-                       their_node_id: their_node_id,
+                       counterparty_prev_commitment_point: None,
+                       counterparty_node_id,
 
-                       their_shutdown_scriptpubkey,
+                       counterparty_shutdown_scriptpubkey,
 
-                       channel_monitor: None,
                        commitment_secrets: CounterpartyCommitmentSecrets::new(),
 
                        network_sync: UpdateStatus::Fresh,
-
-                       logger,
                };
 
                Ok(chan)
        }
 
-       // Utilities to derive keys:
-
-       fn build_local_commitment_secret(&self, idx: u64) -> SecretKey {
-               let res = chan_utils::build_commitment_secret(self.local_keys.commitment_seed(), idx);
-               SecretKey::from_slice(&res).unwrap()
-       }
-
        // Utilities to build transactions:
 
        fn get_commitment_transaction_number_obscure_factor(&self) -> u64 {
                let mut sha = Sha256::engine();
-               let our_payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.payment_base_key());
 
-               let their_payment_basepoint = &self.their_pubkeys.as_ref().unwrap().payment_basepoint.serialize();
+               let counterparty_payment_point = &self.counterparty_pubkeys.as_ref().unwrap().payment_point.serialize();
                if self.channel_outbound {
-                       sha.input(&our_payment_basepoint.serialize());
-                       sha.input(their_payment_basepoint);
+                       sha.input(&self.holder_keys.pubkeys().payment_point.serialize());
+                       sha.input(counterparty_payment_point);
                } else {
-                       sha.input(their_payment_basepoint);
-                       sha.input(&our_payment_basepoint.serialize());
+                       sha.input(counterparty_payment_point);
+                       sha.input(&self.holder_keys.pubkeys().payment_point.serialize());
                }
                let res = Sha256::from_engine(sha).into_inner();
 
@@ -814,7 +833,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// Note that below-dust HTLCs are included in the third return value, but not the second, and
        /// sources are provided only for outbound HTLCs in the third return value.
        #[inline]
-       fn build_commitment_transaction(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool, feerate_per_kw: u64) -> (Transaction, usize, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>) {
+       fn build_commitment_transaction<L: Deref>(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool, feerate_per_kw: u32, logger: &L) -> (Transaction, usize, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>) where L::Target: Logger {
                let obscured_commitment_transaction_number = self.get_commitment_transaction_number_obscure_factor() ^ (INITIAL_COMMITMENT_NUMBER - commitment_number);
 
                let txins = {
@@ -831,12 +850,12 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                let mut txouts: Vec<(TxOut, Option<(HTLCOutputInCommitment, Option<&HTLCSource>)>)> = Vec::with_capacity(self.pending_inbound_htlcs.len() + self.pending_outbound_htlcs.len() + 2);
                let mut included_dust_htlcs: Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)> = Vec::new();
 
-               let dust_limit_satoshis = if local { self.our_dust_limit_satoshis } else { self.their_dust_limit_satoshis };
+               let broadcaster_dust_limit_satoshis = if local { self.holder_dust_limit_satoshis } else { self.counterparty_dust_limit_satoshis };
                let mut remote_htlc_total_msat = 0;
                let mut local_htlc_total_msat = 0;
                let mut value_to_self_msat_offset = 0;
 
-               log_trace!(self, "Building commitment transaction number {} (really {} xor {}) for {}, generated by {} with fee {}...", commitment_number, (INITIAL_COMMITMENT_NUMBER - commitment_number), self.get_commitment_transaction_number_obscure_factor(), if local { "us" } else { "remote" }, if generated_by_local { "us" } else { "remote" }, feerate_per_kw);
+               log_trace!(logger, "Building commitment transaction number {} (really {} xor {}) for {}, generated by {} with fee {}...", commitment_number, (INITIAL_COMMITMENT_NUMBER - commitment_number), self.get_commitment_transaction_number_obscure_factor(), if local { "us" } else { "remote" }, if generated_by_local { "us" } else { "remote" }, feerate_per_kw);
 
                macro_rules! get_htlc_in_commitment {
                        ($htlc: expr, $offered: expr) => {
@@ -854,26 +873,26 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        ($htlc: expr, $outbound: expr, $source: expr, $state_name: expr) => {
                                if $outbound == local { // "offered HTLC output"
                                        let htlc_in_tx = get_htlc_in_commitment!($htlc, true);
-                                       if $htlc.amount_msat / 1000 >= dust_limit_satoshis + (feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
-                                               log_trace!(self, "   ...including {} {} HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
+                                       if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + (feerate_per_kw as u64 * HTLC_TIMEOUT_TX_WEIGHT / 1000) {
+                                               log_trace!(logger, "   ...including {} {} HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
                                                txouts.push((TxOut {
                                                        script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
                                                        value: $htlc.amount_msat / 1000
                                                }, Some((htlc_in_tx, $source))));
                                        } else {
-                                               log_trace!(self, "   ...including {} {} dust HTLC {} (hash {}) with value {} due to dust limit", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
+                                               log_trace!(logger, "   ...including {} {} dust HTLC {} (hash {}) with value {} due to dust limit", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
                                                included_dust_htlcs.push((htlc_in_tx, $source));
                                        }
                                } else {
                                        let htlc_in_tx = get_htlc_in_commitment!($htlc, false);
-                                       if $htlc.amount_msat / 1000 >= dust_limit_satoshis + (feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000) {
-                                               log_trace!(self, "   ...including {} {} HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
+                                       if $htlc.amount_msat / 1000 >= broadcaster_dust_limit_satoshis + (feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000) {
+                                               log_trace!(logger, "   ...including {} {} HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
                                                txouts.push((TxOut { // "received HTLC output"
                                                        script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys).to_v0_p2wsh(),
                                                        value: $htlc.amount_msat / 1000
                                                }, Some((htlc_in_tx, $source))));
                                        } else {
-                                               log_trace!(self, "   ...including {} {} dust HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
+                                               log_trace!(logger, "   ...including {} {} dust HTLC {} (hash {}) with value {}", if $outbound { "outbound" } else { "inbound" }, $state_name, $htlc.htlc_id, log_bytes!($htlc.payment_hash.0), $htlc.amount_msat);
                                                included_dust_htlcs.push((htlc_in_tx, $source));
                                        }
                                }
@@ -893,7 +912,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                add_htlc_output!(htlc, false, None, state_name);
                                remote_htlc_total_msat += htlc.amount_msat;
                        } else {
-                               log_trace!(self, "   ...not including inbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, log_bytes!(htlc.payment_hash.0), htlc.amount_msat, state_name);
+                               log_trace!(logger, "   ...not including inbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, log_bytes!(htlc.payment_hash.0), htlc.amount_msat, state_name);
                                match &htlc.state {
                                        &InboundHTLCState::LocalRemoved(ref reason) => {
                                                if generated_by_local {
@@ -920,7 +939,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                add_htlc_output!(htlc, true, Some(&htlc.source), state_name);
                                local_htlc_total_msat += htlc.amount_msat;
                        } else {
-                               log_trace!(self, "   ...not including outbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, log_bytes!(htlc.payment_hash.0), htlc.amount_msat, state_name);
+                               log_trace!(logger, "   ...not including outbound HTLC {} (hash {}) with value {} due to state ({})", htlc.htlc_id, log_bytes!(htlc.payment_hash.0), htlc.amount_msat, state_name);
                                match htlc.state {
                                        OutboundHTLCState::AwaitingRemoteRevokeToRemove(None)|OutboundHTLCState::AwaitingRemovedRemoteRevoke(None) => {
                                                value_to_self_msat_offset -= htlc.amount_msat as i64;
@@ -948,18 +967,18 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                {
                        // Make sure that the to_self/to_remote is always either past the appropriate
                        // channel_reserve *or* it is making progress towards it.
-                       let mut max_commitment_tx_output = if generated_by_local {
-                               self.max_commitment_tx_output_local.lock().unwrap()
+                       let mut broadcaster_max_commitment_tx_output = if generated_by_local {
+                               self.holder_max_commitment_tx_output.lock().unwrap()
                        } else {
-                               self.max_commitment_tx_output_remote.lock().unwrap()
+                               self.counterparty_max_commitment_tx_output.lock().unwrap()
                        };
-                       debug_assert!(max_commitment_tx_output.0 <= value_to_self_msat as u64 || value_to_self_msat / 1000 >= self.their_channel_reserve_satoshis as i64);
-                       max_commitment_tx_output.0 = cmp::max(max_commitment_tx_output.0, value_to_self_msat as u64);
-                       debug_assert!(max_commitment_tx_output.1 <= value_to_remote_msat as u64 || value_to_remote_msat / 1000 >= Channel::<ChanSigner>::get_our_channel_reserve_satoshis(self.channel_value_satoshis) as i64);
-                       max_commitment_tx_output.1 = cmp::max(max_commitment_tx_output.1, value_to_remote_msat as u64);
+                       debug_assert!(broadcaster_max_commitment_tx_output.0 <= value_to_self_msat as u64 || value_to_self_msat / 1000 >= self.counterparty_selected_channel_reserve_satoshis as i64);
+                       broadcaster_max_commitment_tx_output.0 = cmp::max(broadcaster_max_commitment_tx_output.0, value_to_self_msat as u64);
+                       debug_assert!(broadcaster_max_commitment_tx_output.1 <= value_to_remote_msat as u64 || value_to_remote_msat / 1000 >= Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis) as i64);
+                       broadcaster_max_commitment_tx_output.1 = cmp::max(broadcaster_max_commitment_tx_output.1, value_to_remote_msat as u64);
                }
 
-               let total_fee: u64 = feerate_per_kw * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
+               let total_fee = feerate_per_kw as u64 * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
                let (value_to_self, value_to_remote) = if self.channel_outbound {
                        (value_to_self_msat / 1000 - total_fee as i64, value_to_remote_msat / 1000)
                } else {
@@ -969,21 +988,26 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                let value_to_a = if local { value_to_self } else { value_to_remote };
                let value_to_b = if local { value_to_remote } else { value_to_self };
 
-               if value_to_a >= (dust_limit_satoshis as i64) {
-                       log_trace!(self, "   ...including {} output with value {}", if local { "to_local" } else { "to_remote" }, value_to_a);
+               if value_to_a >= (broadcaster_dust_limit_satoshis as i64) {
+                       log_trace!(logger, "   ...including {} output with value {}", if local { "to_local" } else { "to_remote" }, value_to_a);
                        txouts.push((TxOut {
                                script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key,
-                                                                                      if local { self.their_to_self_delay } else { self.our_to_self_delay },
-                                                                                      &keys.a_delayed_payment_key).to_v0_p2wsh(),
+                                                                                      if local { self.counterparty_selected_contest_delay } else { self.holder_selected_contest_delay },
+                                                                                      &keys.broadcaster_delayed_payment_key).to_v0_p2wsh(),
                                value: value_to_a as u64
                        }, None));
                }
 
-               if value_to_b >= (dust_limit_satoshis as i64) {
-                       log_trace!(self, "   ...including {} output with value {}", if local { "to_remote" } else { "to_local" }, value_to_b);
+               if value_to_b >= (broadcaster_dust_limit_satoshis as i64) {
+                       log_trace!(logger, "   ...including {} output with value {}", if local { "to_remote" } else { "to_local" }, value_to_b);
+                       let static_payment_pk = if local {
+                               self.counterparty_pubkeys.as_ref().unwrap().payment_point
+                       } else {
+                               self.holder_keys.pubkeys().payment_point
+                       }.serialize();
                        txouts.push((TxOut {
                                script_pubkey: Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0)
-                                                            .push_slice(&Hash160::hash(&keys.b_payment_key.serialize())[..])
+                                                            .push_slice(&WPubkeyHash::hash(&static_payment_pk)[..])
                                                             .into_script(),
                                value: value_to_b as u64
                        }, None));
@@ -1025,8 +1049,8 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
        #[inline]
        fn get_closing_scriptpubkey(&self) -> Script {
-               let our_channel_close_key_hash = Hash160::hash(&self.shutdown_pubkey.serialize());
-               Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script()
+               let channel_close_key_hash = WPubkeyHash::hash(&self.shutdown_pubkey.serialize());
+               Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&channel_close_key_hash[..]).into_script()
        }
 
        #[inline]
@@ -1063,14 +1087,14 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        total_fee_satoshis += (-value_to_remote) as u64;
                }
 
-               if !skip_remote_output && value_to_remote as u64 > self.our_dust_limit_satoshis {
+               if !skip_remote_output && value_to_remote as u64 > self.holder_dust_limit_satoshis {
                        txouts.push((TxOut {
-                               script_pubkey: self.their_shutdown_scriptpubkey.clone().unwrap(),
+                               script_pubkey: self.counterparty_shutdown_scriptpubkey.clone().unwrap(),
                                value: value_to_remote as u64
                        }, ()));
                }
 
-               if value_to_self as u64 > self.our_dust_limit_satoshis {
+               if value_to_self as u64 > self.holder_dust_limit_satoshis {
                        txouts.push((TxOut {
                                script_pubkey: self.get_closing_scriptpubkey(),
                                value: value_to_self as u64
@@ -1096,15 +1120,15 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// Creates a set of keys for build_commitment_transaction to generate a transaction which our
        /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
        /// our counterparty!)
-       /// The result is a transaction which we can revoke ownership of (ie a "local" transaction)
+       /// The result is a transaction which we can revoke broadcastership of (ie a "local" transaction)
        /// TODO Some magic rust shit to compile-time check this?
-       fn build_local_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, ChannelError> {
-               let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(commitment_number));
-               let delayed_payment_base = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.delayed_payment_base_key());
-               let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.htlc_base_key());
-               let their_pubkeys = self.their_pubkeys.as_ref().unwrap();
+       fn build_holder_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, ChannelError> {
+               let per_commitment_point = self.holder_keys.get_per_commitment_point(commitment_number, &self.secp_ctx);
+               let delayed_payment_base = &self.holder_keys.pubkeys().delayed_payment_basepoint;
+               let htlc_basepoint = &self.holder_keys.pubkeys().htlc_basepoint;
+               let counterparty_pubkeys = self.counterparty_pubkeys.as_ref().unwrap();
 
-               Ok(secp_check!(TxCreationKeys::new(&self.secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &their_pubkeys.revocation_basepoint, &their_pubkeys.payment_basepoint, &their_pubkeys.htlc_basepoint), "Local tx keys generation got bogus keys"))
+               Ok(secp_check!(TxCreationKeys::derive_new(&self.secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint), "Local tx keys generation got bogus keys".to_owned()))
        }
 
        #[inline]
@@ -1114,27 +1138,25 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, ChannelError> {
                //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
                //may see payments to it!
-               let payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.payment_base_key());
-               let revocation_basepoint = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.revocation_base_key());
-               let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.htlc_base_key());
-               let their_pubkeys = self.their_pubkeys.as_ref().unwrap();
+               let revocation_basepoint = &self.holder_keys.pubkeys().revocation_basepoint;
+               let htlc_basepoint = &self.holder_keys.pubkeys().htlc_basepoint;
+               let counterparty_pubkeys = self.counterparty_pubkeys.as_ref().unwrap();
 
-               Ok(secp_check!(TxCreationKeys::new(&self.secp_ctx, &self.their_cur_commitment_point.unwrap(), &their_pubkeys.delayed_payment_basepoint, &their_pubkeys.htlc_basepoint, &revocation_basepoint, &payment_basepoint, &htlc_basepoint), "Remote tx keys generation got bogus keys"))
+               Ok(secp_check!(TxCreationKeys::derive_new(&self.secp_ctx, &self.counterparty_cur_commitment_point.unwrap(), &counterparty_pubkeys.delayed_payment_basepoint, &counterparty_pubkeys.htlc_basepoint, revocation_basepoint, htlc_basepoint), "Remote tx keys generation got bogus keys".to_owned()))
        }
 
        /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
        /// pays to get_funding_redeemscript().to_v0_p2wsh()).
        /// Panics if called before accept_channel/new_from_req
        pub fn get_funding_redeemscript(&self) -> Script {
-               let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.funding_key());
-               make_funding_redeemscript(&our_funding_key, self.their_funding_pubkey())
+               make_funding_redeemscript(&self.holder_keys.pubkeys().funding_pubkey, self.counterparty_funding_pubkey())
        }
 
        /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
        /// @local is used only to convert relevant internal structures which refer to remote vs local
        /// to decide value of outputs and direction of HTLCs.
-       fn build_htlc_transaction(&self, prev_hash: &Sha256dHash, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys, feerate_per_kw: u64) -> Transaction {
-               chan_utils::build_htlc_transaction(prev_hash, feerate_per_kw, if local { self.their_to_self_delay } else { self.our_to_self_delay }, htlc, &keys.a_delayed_payment_key, &keys.revocation_key)
+       fn build_htlc_transaction(&self, prev_hash: &Txid, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys, feerate_per_kw: u32) -> Transaction {
+               chan_utils::build_htlc_transaction(prev_hash, feerate_per_kw, if local { self.counterparty_selected_contest_delay } else { self.holder_selected_contest_delay }, htlc, &keys.broadcaster_delayed_payment_key, &keys.revocation_key)
        }
 
        /// Per HTLC, only one get_update_fail_htlc or get_update_fulfill_htlc call may be made.
@@ -1143,7 +1165,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        ///
        /// Note that it is still possible to hit these assertions in case we find a preimage on-chain
        /// but then have a reorg which settles on an HTLC-failure on chain.
-       fn get_update_fulfill_htlc(&mut self, htlc_id_arg: u64, payment_preimage_arg: PaymentPreimage) -> Result<(Option<msgs::UpdateFulfillHTLC>, Option<ChannelMonitorUpdate>), ChannelError> {
+       fn get_update_fulfill_htlc<L: Deref>(&mut self, htlc_id_arg: u64, payment_preimage_arg: PaymentPreimage, logger: &L) -> Result<(Option<msgs::UpdateFulfillHTLC>, Option<ChannelMonitorUpdate>), ChannelError> where L::Target: Logger {
                // Either ChannelFunded got set (which means it won't be unset) or there is no way any
                // caller thought we could have something claimed (cause we wouldn't have accepted in an
                // incoming HTLC anyway). If we got to ShutdownComplete, callers aren't allowed to call us,
@@ -1168,7 +1190,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                        InboundHTLCState::LocalRemoved(ref reason) => {
                                                if let &InboundHTLCRemovalReason::Fulfill(_) = reason {
                                                } else {
-                                                       log_warn!(self, "Have preimage and want to fulfill HTLC with payment hash {} we already failed against channel {}", log_bytes!(htlc.payment_hash.0), log_bytes!(self.channel_id()));
+                                                       log_warn!(logger, "Have preimage and want to fulfill HTLC with payment hash {} we already failed against channel {}", log_bytes!(htlc.payment_hash.0), log_bytes!(self.channel_id()));
                                                }
                                                debug_assert!(false, "Tried to fulfill an HTLC that was already fail/fulfilled");
                                                return Ok((None, None));
@@ -1183,7 +1205,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        }
                }
                if pending_idx == std::usize::MAX {
-                       return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID"));
+                       return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
                }
 
                // Now update local state:
@@ -1197,7 +1219,6 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                payment_preimage: payment_preimage_arg.clone(),
                        }],
                };
-               self.channel_monitor.as_mut().unwrap().update_monitor_ooo(monitor_update.clone()).unwrap();
 
                if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
                        for pending_update in self.holding_cell_htlc_updates.iter() {
@@ -1212,7 +1233,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                        },
                                        &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
                                                if htlc_id_arg == htlc_id {
-                                                       log_warn!(self, "Have preimage and want to fulfill HTLC with pending failure against channel {}", log_bytes!(self.channel_id()));
+                                                       log_warn!(logger, "Have preimage and want to fulfill HTLC with pending failure against channel {}", log_bytes!(self.channel_id()));
                                                        // TODO: We may actually be able to switch to a fulfill here, though its
                                                        // rare enough it may not be worth the complexity burden.
                                                        debug_assert!(false, "Tried to fulfill an HTLC that was already failed");
@@ -1222,7 +1243,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                        _ => {}
                                }
                        }
-                       log_trace!(self, "Adding HTLC claim to holding_cell! Current state: {}", self.channel_state);
+                       log_trace!(logger, "Adding HTLC claim to holding_cell! Current state: {}", self.channel_state);
                        self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::ClaimHTLC {
                                payment_preimage: payment_preimage_arg, htlc_id: htlc_id_arg,
                        });
@@ -1236,7 +1257,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
                                return Ok((None, Some(monitor_update)));
                        }
-                       log_trace!(self, "Upgrading HTLC {} to LocalRemoved with a Fulfill!", log_bytes!(htlc.payment_hash.0));
+                       log_trace!(logger, "Upgrading HTLC {} to LocalRemoved with a Fulfill!", log_bytes!(htlc.payment_hash.0));
                        htlc.state = InboundHTLCState::LocalRemoved(InboundHTLCRemovalReason::Fulfill(payment_preimage_arg.clone()));
                }
 
@@ -1247,10 +1268,10 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                }), Some(monitor_update)))
        }
 
-       pub fn get_update_fulfill_htlc_and_commit(&mut self, htlc_id: u64, payment_preimage: PaymentPreimage) -> Result<(Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>, Option<ChannelMonitorUpdate>), ChannelError> {
-               match self.get_update_fulfill_htlc(htlc_id, payment_preimage)? {
+       pub fn get_update_fulfill_htlc_and_commit<L: Deref>(&mut self, htlc_id: u64, payment_preimage: PaymentPreimage, logger: &L) -> Result<(Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)>, Option<ChannelMonitorUpdate>), ChannelError> where L::Target: Logger {
+               match self.get_update_fulfill_htlc(htlc_id, payment_preimage, logger)? {
                        (Some(update_fulfill_htlc), Some(mut monitor_update)) => {
-                               let (commitment, mut additional_update) = self.send_commitment_no_status_check()?;
+                               let (commitment, mut additional_update) = self.send_commitment_no_status_check(logger)?;
                                // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
                                // strictly increasing by one, so decrement it here.
                                self.latest_monitor_update_id = monitor_update.update_id;
@@ -1258,7 +1279,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
                        },
                        (Some(update_fulfill_htlc), None) => {
-                               let (commitment, monitor_update) = self.send_commitment_no_status_check()?;
+                               let (commitment, monitor_update) = self.send_commitment_no_status_check(logger)?;
                                Ok((Some((update_fulfill_htlc, commitment)), Some(monitor_update)))
                        },
                        (None, Some(monitor_update)) => Ok((None, Some(monitor_update))),
@@ -1293,14 +1314,14 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                        },
                                        _ => {
                                                debug_assert!(false, "Have an inbound HTLC we tried to claim before it was fully committed to");
-                                               return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID"));
+                                               return Err(ChannelError::Ignore(format!("Unable to find a pending HTLC which matched the given HTLC ID ({})", htlc.htlc_id)));
                                        }
                                }
                                pending_idx = idx;
                        }
                }
                if pending_idx == std::usize::MAX {
-                       return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID"));
+                       return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
                }
 
                // Now update local state:
@@ -1310,13 +1331,13 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                        &HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
                                                if htlc_id_arg == htlc_id {
                                                        debug_assert!(false, "Tried to fail an HTLC that was already fulfilled");
-                                                       return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID"));
+                                                       return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
                                                }
                                        },
                                        &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, .. } => {
                                                if htlc_id_arg == htlc_id {
                                                        debug_assert!(false, "Tried to fail an HTLC that was already failed");
-                                                       return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID"));
+                                                       return Err(ChannelError::Ignore("Unable to find a pending HTLC which matched the given HTLC ID".to_owned()));
                                                }
                                        },
                                        _ => {}
@@ -1346,63 +1367,66 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel, config: &UserConfig, their_features: InitFeatures) -> Result<(), ChannelError> {
                // Check sanity of message fields:
                if !self.channel_outbound {
-                       return Err(ChannelError::Close("Got an accept_channel message from an inbound peer"));
+                       return Err(ChannelError::Close("Got an accept_channel message from an inbound peer".to_owned()));
                }
                if self.channel_state != ChannelState::OurInitSent as u32 {
-                       return Err(ChannelError::Close("Got an accept_channel message at a strange time"));
+                       return Err(ChannelError::Close("Got an accept_channel message at a strange time".to_owned()));
                }
                if msg.dust_limit_satoshis > 21000000 * 100000000 {
-                       return Err(ChannelError::Close("Peer never wants payout outputs?"));
+                       return Err(ChannelError::Close(format!("Peer never wants payout outputs? dust_limit_satoshis was {}", msg.dust_limit_satoshis)));
                }
                if msg.channel_reserve_satoshis > self.channel_value_satoshis {
-                       return Err(ChannelError::Close("Bogus channel_reserve_satoshis"));
+                       return Err(ChannelError::Close(format!("Bogus channel_reserve_satoshis ({}). Must not be greater than ({})", msg.channel_reserve_satoshis, self.channel_value_satoshis)));
                }
                if msg.dust_limit_satoshis > msg.channel_reserve_satoshis {
-                       return Err(ChannelError::Close("Bogus channel_reserve and dust_limit"));
+                       return Err(ChannelError::Close(format!("Bogus channel_reserve ({}) and dust_limit ({})", msg.channel_reserve_satoshis, msg.dust_limit_satoshis)));
                }
-               if msg.channel_reserve_satoshis < self.our_dust_limit_satoshis {
-                       return Err(ChannelError::Close("Peer never wants payout outputs?"));
+               if msg.channel_reserve_satoshis < self.holder_dust_limit_satoshis {
+                       return Err(ChannelError::Close(format!("Peer never wants payout outputs? channel_reserve_satoshis was ({}). dust_limit is ({})", msg.channel_reserve_satoshis, self.holder_dust_limit_satoshis)));
                }
-               if msg.dust_limit_satoshis > Channel::<ChanSigner>::get_our_channel_reserve_satoshis(self.channel_value_satoshis) {
-                       return Err(ChannelError::Close("Dust limit is bigger than our channel reverse"));
+               let remote_reserve = Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
+               if msg.dust_limit_satoshis > remote_reserve {
+                       return Err(ChannelError::Close(format!("Dust limit ({}) is bigger than our channel reserve ({})", msg.dust_limit_satoshis, remote_reserve)));
                }
-               if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 {
-                       return Err(ChannelError::Close("Minimum htlc value is full channel value"));
+               let full_channel_value_msat = (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000;
+               if msg.htlc_minimum_msat >= full_channel_value_msat {
+                       return Err(ChannelError::Close(format!("Minimum htlc value ({}) is full channel value ({})", msg.htlc_minimum_msat, full_channel_value_msat)));
                }
-               if msg.to_self_delay > config.peer_channel_config_limits.their_to_self_delay || msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
-                       return Err(ChannelError::Close("They wanted our payments to be delayed by a needlessly long period"));
+               let max_delay_acceptable = u16::min(config.peer_channel_config_limits.their_to_self_delay, MAX_LOCAL_BREAKDOWN_TIMEOUT);
+               if msg.to_self_delay > max_delay_acceptable {
+                       return Err(ChannelError::Close(format!("They wanted our payments to be delayed by a needlessly long period. Upper limit: {}. Actual: {}", max_delay_acceptable, msg.to_self_delay)));
                }
                if msg.max_accepted_htlcs < 1 {
-                       return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel"));
+                       return Err(ChannelError::Close("0 max_accepted_htlcs makes for a useless channel".to_owned()));
                }
                if msg.max_accepted_htlcs > 483 {
-                       return Err(ChannelError::Close("max_accepted_htlcs > 483"));
+                       return Err(ChannelError::Close(format!("max_accepted_htlcs was {}. It must not be larger than 483", msg.max_accepted_htlcs)));
                }
 
                // Now check against optional parameters as set by config...
                if msg.htlc_minimum_msat > config.peer_channel_config_limits.max_htlc_minimum_msat {
-                       return Err(ChannelError::Close("htlc minimum msat is higher than the user specified limit"));
+                       return Err(ChannelError::Close(format!("htlc_minimum_msat ({}) is higher than the user specified limit ({})", msg.htlc_minimum_msat, config.peer_channel_config_limits.max_htlc_minimum_msat)));
                }
                if msg.max_htlc_value_in_flight_msat < config.peer_channel_config_limits.min_max_htlc_value_in_flight_msat {
-                       return Err(ChannelError::Close("max htlc value in flight msat is less than the user specified limit"));
+                       return Err(ChannelError::Close(format!("max_htlc_value_in_flight_msat ({}) is less than the user specified limit ({})", msg.max_htlc_value_in_flight_msat, config.peer_channel_config_limits.min_max_htlc_value_in_flight_msat)));
                }
                if msg.channel_reserve_satoshis > config.peer_channel_config_limits.max_channel_reserve_satoshis {
-                       return Err(ChannelError::Close("channel reserve satoshis is higher than the user specified limit"));
+                       return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is higher than the user specified limit ({})", msg.channel_reserve_satoshis, config.peer_channel_config_limits.max_channel_reserve_satoshis)));
                }
                if msg.max_accepted_htlcs < config.peer_channel_config_limits.min_max_accepted_htlcs {
-                       return Err(ChannelError::Close("max accepted htlcs is less than the user specified limit"));
+                       return Err(ChannelError::Close(format!("max_accepted_htlcs ({}) is less than the user specified limit ({})", msg.max_accepted_htlcs, config.peer_channel_config_limits.min_max_accepted_htlcs)));
                }
                if msg.dust_limit_satoshis < config.peer_channel_config_limits.min_dust_limit_satoshis {
-                       return Err(ChannelError::Close("dust limit satoshis is less than the user specified limit"));
+                       return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the user specified limit ({})", msg.dust_limit_satoshis, config.peer_channel_config_limits.min_dust_limit_satoshis)));
                }
                if msg.dust_limit_satoshis > config.peer_channel_config_limits.max_dust_limit_satoshis {
-                       return Err(ChannelError::Close("dust limit satoshis is greater than the user specified limit"));
+                       return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the user specified limit ({})", msg.dust_limit_satoshis, config.peer_channel_config_limits.max_dust_limit_satoshis)));
                }
                if msg.minimum_depth > config.peer_channel_config_limits.max_minimum_depth {
-                       return Err(ChannelError::Close("We consider the minimum depth to be unreasonably large"));
+                       return Err(ChannelError::Close(format!("We consider the minimum depth to be unreasonably large. Expected minimum: ({}). Actual: ({})", config.peer_channel_config_limits.max_minimum_depth, msg.minimum_depth)));
                }
 
-               let their_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
+               let counterparty_shutdown_scriptpubkey = if their_features.supports_upfront_shutdown_script() {
                        match &msg.shutdown_scriptpubkey {
                                &OptionalField::Present(ref script) => {
                                        // Peer is signaling upfront_shutdown and has provided a non-accepted scriptpubkey format. We enforce it while receiving shutdown msg
@@ -1413,88 +1437,90 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                                None
                                        // Peer is signaling upfront_shutdown and has provided a non-accepted scriptpubkey format. Fail the channel
                                        } else {
-                                               return Err(ChannelError::Close("Peer is signaling upfront_shutdown but has provided a non-accepted scriptpubkey format"));
+                                               return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided a non-accepted scriptpubkey format. scriptpubkey: ({})", script.to_bytes().to_hex())));
                                        }
                                },
                                // Peer is signaling upfront shutdown but don't opt-out with correct mechanism (a.k.a 0-length script). Peer looks buggy, we fail the channel
                                &OptionalField::Absent => {
-                                       return Err(ChannelError::Close("Peer is signaling upfront_shutdown but we don't get any script. Use 0-length script to opt-out"));
+                                       return Err(ChannelError::Close("Peer is signaling upfront_shutdown but we don't get any script. Use 0-length script to opt-out".to_owned()));
                                }
                        }
                } else { None };
 
-               self.their_dust_limit_satoshis = msg.dust_limit_satoshis;
-               self.their_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
-               self.their_channel_reserve_satoshis = msg.channel_reserve_satoshis;
-               self.their_htlc_minimum_msat = msg.htlc_minimum_msat;
-               self.their_to_self_delay = msg.to_self_delay;
-               self.their_max_accepted_htlcs = msg.max_accepted_htlcs;
+               self.counterparty_dust_limit_satoshis = msg.dust_limit_satoshis;
+               self.counterparty_max_htlc_value_in_flight_msat = cmp::min(msg.max_htlc_value_in_flight_msat, self.channel_value_satoshis * 1000);
+               self.counterparty_selected_channel_reserve_satoshis = msg.channel_reserve_satoshis;
+               self.counterparty_htlc_minimum_msat = msg.htlc_minimum_msat;
+               self.counterparty_selected_contest_delay = msg.to_self_delay;
+               self.counterparty_max_accepted_htlcs = msg.max_accepted_htlcs;
                self.minimum_depth = msg.minimum_depth;
 
-               let their_pubkeys = ChannelPublicKeys {
+               let counterparty_pubkeys = ChannelPublicKeys {
                        funding_pubkey: msg.funding_pubkey,
                        revocation_basepoint: msg.revocation_basepoint,
-                       payment_basepoint: msg.payment_basepoint,
+                       payment_point: msg.payment_point,
                        delayed_payment_basepoint: msg.delayed_payment_basepoint,
                        htlc_basepoint: msg.htlc_basepoint
                };
 
-               self.local_keys.set_remote_channel_pubkeys(&their_pubkeys);
-               self.their_pubkeys = Some(their_pubkeys);
+               self.holder_keys.on_accept(&counterparty_pubkeys, msg.to_self_delay, self.holder_selected_contest_delay);
+               self.counterparty_pubkeys = Some(counterparty_pubkeys);
 
-               self.their_cur_commitment_point = Some(msg.first_per_commitment_point);
-               self.their_shutdown_scriptpubkey = their_shutdown_scriptpubkey;
+               self.counterparty_cur_commitment_point = Some(msg.first_per_commitment_point);
+               self.counterparty_shutdown_scriptpubkey = counterparty_shutdown_scriptpubkey;
 
                self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32;
 
                Ok(())
        }
 
-       fn funding_created_signature(&mut self, sig: &Signature) -> Result<(Transaction, LocalCommitmentTransaction, Signature), ChannelError> {
+       fn funding_created_signature<L: Deref>(&mut self, sig: &Signature, logger: &L) -> Result<(Transaction, HolderCommitmentTransaction, Signature), ChannelError> where L::Target: Logger {
                let funding_script = self.get_funding_redeemscript();
 
-               let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
-               let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, self.feerate_per_kw).0;
-               let local_sighash = hash_to_message!(&bip143::SighashComponents::new(&local_initial_commitment_tx).sighash_all(&local_initial_commitment_tx.input[0], &funding_script, self.channel_value_satoshis)[..]);
+               let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
+               let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, self.feerate_per_kw, logger).0;
+               let sighash = hash_to_message!(&bip143::SigHashCache::new(&initial_commitment_tx).signature_hash(0, &funding_script, self.channel_value_satoshis, SigHashType::All)[..]);
 
-               // They sign the "local" commitment transaction...
-               secp_check!(self.secp_ctx.verify(&local_sighash, &sig, self.their_funding_pubkey()), "Invalid funding_created signature from peer");
+               // They sign the "our" commitment transaction...
+               log_trace!(logger, "Checking funding_created tx signature {} by key {} against tx {} (sighash {}) with redeemscript {}", log_bytes!(sig.serialize_compact()[..]), log_bytes!(self.counterparty_funding_pubkey().serialize()), encode::serialize_hex(&initial_commitment_tx), log_bytes!(sighash[..]), encode::serialize_hex(&funding_script));
+               secp_check!(self.secp_ctx.verify(&sighash, &sig, self.counterparty_funding_pubkey()), "Invalid funding_created signature from peer".to_owned());
 
-               let localtx = LocalCommitmentTransaction::new_missing_local_sig(local_initial_commitment_tx, sig, &PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.funding_key()), self.their_funding_pubkey(), local_keys, self.feerate_per_kw, Vec::new());
+               let tx = HolderCommitmentTransaction::new_missing_holder_sig(initial_commitment_tx, sig.clone(), &self.holder_keys.pubkeys().funding_pubkey, self.counterparty_funding_pubkey(), keys, self.feerate_per_kw, Vec::new());
 
-               let remote_keys = self.build_remote_transaction_keys()?;
-               let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false, self.feerate_per_kw).0;
-               let remote_signature = self.local_keys.sign_remote_commitment(self.feerate_per_kw, &remote_initial_commitment_tx, &remote_keys, &Vec::new(), self.our_to_self_delay, &self.secp_ctx)
-                               .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed"))?.0;
+               let counterparty_keys = self.build_remote_transaction_keys()?;
+               let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, self.feerate_per_kw, logger).0;
+               let pre_remote_keys = PreCalculatedTxCreationKeys::new(counterparty_keys);
+               let counterparty_signature = self.holder_keys.sign_counterparty_commitment(self.feerate_per_kw, &counterparty_initial_commitment_tx, &pre_remote_keys, &Vec::new(), &self.secp_ctx)
+                               .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0;
 
-               // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish.
-               Ok((remote_initial_commitment_tx, localtx, remote_signature))
+               // We sign "counterparty" commitment transaction, allowing them to broadcast the tx if they wish.
+               Ok((counterparty_initial_commitment_tx, tx, counterparty_signature))
        }
 
-       fn their_funding_pubkey(&self) -> &PublicKey {
-               &self.their_pubkeys.as_ref().expect("their_funding_pubkey() only allowed after accept_channel").funding_pubkey
+       fn counterparty_funding_pubkey(&self) -> &PublicKey {
+               &self.counterparty_pubkeys.as_ref().expect("funding_pubkey() only allowed after accept_channel").funding_pubkey
        }
 
-       pub fn funding_created(&mut self, msg: &msgs::FundingCreated) -> Result<(msgs::FundingSigned, ChannelMonitor<ChanSigner>), ChannelError> {
+       pub fn funding_created<L: Deref>(&mut self, msg: &msgs::FundingCreated, logger: &L) -> Result<(msgs::FundingSigned, ChannelMonitor<ChanSigner>), ChannelError> where L::Target: Logger {
                if self.channel_outbound {
-                       return Err(ChannelError::Close("Received funding_created for an outbound channel?"));
+                       return Err(ChannelError::Close("Received funding_created for an outbound channel?".to_owned()));
                }
                if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) {
                        // BOLT 2 says that if we disconnect before we send funding_signed we SHOULD NOT
                        // remember the channel, so it's safe to just send an error_message here and drop the
                        // channel.
-                       return Err(ChannelError::Close("Received funding_created after we got the channel!"));
+                       return Err(ChannelError::Close("Received funding_created after we got the channel!".to_owned()));
                }
                if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
-                               self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
-                               self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
+                               self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
+                               self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
                        panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
                }
 
-               let funding_txo = OutPoint::new(msg.funding_txid, msg.funding_output_index);
+               let funding_txo = OutPoint{ txid: msg.funding_txid, index: msg.funding_output_index };
                self.funding_txo = Some(funding_txo.clone());
 
-               let (remote_initial_commitment_tx, local_initial_commitment_tx, our_signature) = match self.funding_created_signature(&msg.signature) {
+               let (counterparty_initial_commitment_tx, initial_commitment_tx, signature) = match self.funding_created_signature(&msg.signature, logger) {
                        Ok(res) => res,
                        Err(e) => {
                                self.funding_txo = None;
@@ -1504,106 +1530,102 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
                // Now that we're past error-generating stuff, update our local state:
 
-               let their_pubkeys = self.their_pubkeys.as_ref().unwrap();
+               let counterparty_pubkeys = self.counterparty_pubkeys.as_ref().unwrap();
                let funding_redeemscript = self.get_funding_redeemscript();
                let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
                macro_rules! create_monitor {
                        () => { {
-                               let mut channel_monitor = ChannelMonitor::new(self.local_keys.clone(),
-                                                                             &self.shutdown_pubkey, self.our_to_self_delay,
+                               let mut channel_monitor = ChannelMonitor::new(self.holder_keys.clone(),
+                                                                             &self.shutdown_pubkey, self.holder_selected_contest_delay,
                                                                              &self.destination_script, (funding_txo, funding_txo_script.clone()),
-                                                                             &their_pubkeys.htlc_basepoint, &their_pubkeys.delayed_payment_basepoint,
-                                                                             self.their_to_self_delay, funding_redeemscript.clone(), self.channel_value_satoshis,
+                                                                             &counterparty_pubkeys.htlc_basepoint, &counterparty_pubkeys.delayed_payment_basepoint,
+                                                                             self.counterparty_selected_contest_delay, funding_redeemscript.clone(), self.channel_value_satoshis,
                                                                              self.get_commitment_transaction_number_obscure_factor(),
-                                                                             local_initial_commitment_tx.clone(),
-                                                                             self.logger.clone());
+                                                                             initial_commitment_tx.clone());
 
-                               channel_monitor.provide_latest_remote_commitment_tx_info(&remote_initial_commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number, self.their_cur_commitment_point.unwrap());
+                               channel_monitor.provide_latest_counterparty_commitment_tx_info(&counterparty_initial_commitment_tx, Vec::new(), self.cur_counterparty_commitment_transaction_number, self.counterparty_cur_commitment_point.unwrap(), logger);
                                channel_monitor
                        } }
                }
 
-               self.channel_monitor = Some(create_monitor!());
                let channel_monitor = create_monitor!();
 
                self.channel_state = ChannelState::FundingSent as u32;
                self.channel_id = funding_txo.to_channel_id();
-               self.cur_remote_commitment_transaction_number -= 1;
-               self.cur_local_commitment_transaction_number -= 1;
+               self.cur_counterparty_commitment_transaction_number -= 1;
+               self.cur_holder_commitment_transaction_number -= 1;
 
                Ok((msgs::FundingSigned {
                        channel_id: self.channel_id,
-                       signature: our_signature
+                       signature: signature
                }, channel_monitor))
        }
 
        /// Handles a funding_signed message from the remote end.
        /// If this call is successful, broadcast the funding transaction (and not before!)
-       pub fn funding_signed(&mut self, msg: &msgs::FundingSigned) -> Result<ChannelMonitor<ChanSigner>, ChannelError> {
+       pub fn funding_signed<L: Deref>(&mut self, msg: &msgs::FundingSigned, logger: &L) -> Result<ChannelMonitor<ChanSigner>, ChannelError> where L::Target: Logger {
                if !self.channel_outbound {
-                       return Err(ChannelError::Close("Received funding_signed for an inbound channel?"));
+                       return Err(ChannelError::Close("Received funding_signed for an inbound channel?".to_owned()));
                }
                if self.channel_state & !(ChannelState::MonitorUpdateFailed as u32) != ChannelState::FundingCreated as u32 {
-                       return Err(ChannelError::Close("Received funding_signed in strange state!"));
+                       return Err(ChannelError::Close("Received funding_signed in strange state!".to_owned()));
                }
                if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
-                               self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
-                               self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
+                               self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
+                               self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
                        panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
                }
 
                let funding_script = self.get_funding_redeemscript();
 
-               let remote_keys = self.build_remote_transaction_keys()?;
-               let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false, self.feerate_per_kw).0;
+               let counterparty_keys = self.build_remote_transaction_keys()?;
+               let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, self.feerate_per_kw, logger).0;
 
-               let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?;
-               let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, self.feerate_per_kw).0;
-               let local_sighash = hash_to_message!(&bip143::SighashComponents::new(&local_initial_commitment_tx).sighash_all(&local_initial_commitment_tx.input[0], &funding_script, self.channel_value_satoshis)[..]);
+               let holder_keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
+               let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &holder_keys, true, false, self.feerate_per_kw, logger).0;
+               let sighash = hash_to_message!(&bip143::SigHashCache::new(&initial_commitment_tx).signature_hash(0, &funding_script, self.channel_value_satoshis, SigHashType::All)[..]);
 
-               let their_funding_pubkey = &self.their_pubkeys.as_ref().unwrap().funding_pubkey;
+               let counterparty_funding_pubkey = &self.counterparty_pubkeys.as_ref().unwrap().funding_pubkey;
 
-               // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish.
-               if let Err(_) = self.secp_ctx.verify(&local_sighash, &msg.signature, their_funding_pubkey) {
-                       return Err(ChannelError::Close("Invalid funding_signed signature from peer"));
+               // They sign our commitment transaction, allowing us to broadcast the tx if we wish.
+               if let Err(_) = self.secp_ctx.verify(&sighash, &msg.signature, counterparty_funding_pubkey) {
+                       return Err(ChannelError::Close("Invalid funding_signed signature from peer".to_owned()));
                }
 
-               let their_pubkeys = self.their_pubkeys.as_ref().unwrap();
+               let counterparty_pubkeys = self.counterparty_pubkeys.as_ref().unwrap();
                let funding_redeemscript = self.get_funding_redeemscript();
                let funding_txo = self.funding_txo.as_ref().unwrap();
                let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
                macro_rules! create_monitor {
                        () => { {
-                               let local_commitment_tx = LocalCommitmentTransaction::new_missing_local_sig(local_initial_commitment_tx.clone(), &msg.signature, &PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.funding_key()), their_funding_pubkey, local_keys.clone(), self.feerate_per_kw, Vec::new());
-                               let mut channel_monitor = ChannelMonitor::new(self.local_keys.clone(),
-                                                                             &self.shutdown_pubkey, self.our_to_self_delay,
+                               let commitment_tx = HolderCommitmentTransaction::new_missing_holder_sig(initial_commitment_tx.clone(), msg.signature.clone(), &self.holder_keys.pubkeys().funding_pubkey, counterparty_funding_pubkey, holder_keys.clone(), self.feerate_per_kw, Vec::new());
+                               let mut channel_monitor = ChannelMonitor::new(self.holder_keys.clone(),
+                                                                             &self.shutdown_pubkey, self.holder_selected_contest_delay,
                                                                              &self.destination_script, (funding_txo.clone(), funding_txo_script.clone()),
-                                                                             &their_pubkeys.htlc_basepoint, &their_pubkeys.delayed_payment_basepoint,
-                                                                             self.their_to_self_delay, funding_redeemscript.clone(), self.channel_value_satoshis,
+                                                                             &counterparty_pubkeys.htlc_basepoint, &counterparty_pubkeys.delayed_payment_basepoint,
+                                                                             self.counterparty_selected_contest_delay, funding_redeemscript.clone(), self.channel_value_satoshis,
                                                                              self.get_commitment_transaction_number_obscure_factor(),
-                                                                             local_commitment_tx,
-                                                                             self.logger.clone());
+                                                                             commitment_tx);
 
-                               channel_monitor.provide_latest_remote_commitment_tx_info(&remote_initial_commitment_tx, Vec::new(), self.cur_remote_commitment_transaction_number, self.their_cur_commitment_point.unwrap());
+                               channel_monitor.provide_latest_counterparty_commitment_tx_info(&counterparty_initial_commitment_tx, Vec::new(), self.cur_counterparty_commitment_transaction_number, self.counterparty_cur_commitment_point.unwrap(), logger);
 
                                channel_monitor
                        } }
                }
 
-               self.channel_monitor = Some(create_monitor!());
                let channel_monitor = create_monitor!();
 
                assert_eq!(self.channel_state & (ChannelState::MonitorUpdateFailed as u32), 0); // We have no had any monitor(s) yet to fail update!
                self.channel_state = ChannelState::FundingSent as u32;
-               self.cur_local_commitment_transaction_number -= 1;
-               self.cur_remote_commitment_transaction_number -= 1;
+               self.cur_holder_commitment_transaction_number -= 1;
+               self.cur_counterparty_commitment_transaction_number -= 1;
 
                Ok(channel_monitor)
        }
 
        pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), ChannelError> {
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent funding_locked when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent funding_locked when we needed a channel_reestablish".to_owned()));
                }
 
                let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
@@ -1615,22 +1637,22 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        self.update_time_counter += 1;
                } else if (self.channel_state & (ChannelState::ChannelFunded as u32) != 0 &&
                                 // Note that funding_signed/funding_created will have decremented both by 1!
-                                self.cur_local_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 &&
-                                self.cur_remote_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1) ||
+                                self.cur_holder_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1 &&
+                                self.cur_counterparty_commitment_transaction_number == INITIAL_COMMITMENT_NUMBER - 1) ||
                                // If we reconnected before sending our funding locked they may still resend theirs:
                                (self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) ==
                                                      (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32)) {
-                       if self.their_cur_commitment_point != Some(msg.next_per_commitment_point) {
-                               return Err(ChannelError::Close("Peer sent a reconnect funding_locked with a different point"));
+                       if self.counterparty_cur_commitment_point != Some(msg.next_per_commitment_point) {
+                               return Err(ChannelError::Close("Peer sent a reconnect funding_locked with a different point".to_owned()));
                        }
                        // They probably disconnected/reconnected and re-sent the funding_locked, which is required
                        return Ok(());
                } else {
-                       return Err(ChannelError::Close("Peer sent a funding_locked at a strange time"));
+                       return Err(ChannelError::Close("Peer sent a funding_locked at a strange time".to_owned()));
                }
 
-               self.their_prev_commitment_point = self.their_cur_commitment_point;
-               self.their_cur_commitment_point = Some(msg.next_per_commitment_point);
+               self.counterparty_prev_commitment_point = self.counterparty_cur_commitment_point;
+               self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
                Ok(())
        }
 
@@ -1668,36 +1690,111 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// corner case properly.
        pub fn get_inbound_outbound_available_balance_msat(&self) -> (u64, u64) {
                // Note that we have to handle overflow due to the above case.
-               (cmp::min(self.channel_value_satoshis as i64 * 1000 - self.value_to_self_msat as i64 - self.get_inbound_pending_htlc_stats().1 as i64, 0) as u64,
-               cmp::min(self.value_to_self_msat as i64 - self.get_outbound_pending_htlc_stats().1 as i64, 0) as u64)
+               (cmp::max(self.channel_value_satoshis as i64 * 1000 - self.value_to_self_msat as i64 - self.get_inbound_pending_htlc_stats().1 as i64, 0) as u64,
+               cmp::max(self.value_to_self_msat as i64 - self.get_outbound_pending_htlc_stats().1 as i64, 0) as u64)
+       }
+
+       // Get the fee cost of a commitment tx with a given number of HTLC outputs.
+       // Note that num_htlcs should not include dust HTLCs.
+       fn commit_tx_fee_msat(&self, num_htlcs: usize) -> u64 {
+               // Note that we need to divide before multiplying to round properly,
+               // since the lowest denomination of bitcoin on-chain is the satoshi.
+               (COMMITMENT_TX_BASE_WEIGHT + num_htlcs as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC) * self.feerate_per_kw as u64 / 1000 * 1000
        }
 
-       pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingHTLCStatus) -> Result<(), ChannelError> {
-               if (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32) {
-                       return Err(ChannelError::Close("Got add HTLC message when channel was not in an operational state"));
+       // Get the commitment tx fee for the local (i.e our) next commitment transaction
+       // based on the number of pending HTLCs that are on track to be in our next
+       // commitment tx. `addl_htcs` is an optional parameter allowing the caller
+       // to add a number of additional HTLCs to the calculation. Note that dust
+       // HTLCs are excluded.
+       fn next_local_commit_tx_fee_msat(&self, addl_htlcs: usize) -> u64 {
+               assert!(self.channel_outbound);
+
+               let mut their_acked_htlcs = self.pending_inbound_htlcs.len();
+               for ref htlc in self.pending_outbound_htlcs.iter() {
+                       if htlc.amount_msat / 1000 <= self.holder_dust_limit_satoshis {
+                               continue
+                       }
+                       match htlc.state {
+                               OutboundHTLCState::Committed => their_acked_htlcs += 1,
+                               OutboundHTLCState::RemoteRemoved {..} => their_acked_htlcs += 1,
+                               OutboundHTLCState::LocalAnnounced {..} => their_acked_htlcs += 1,
+                               _ => {},
+                       }
+               }
+
+               for htlc in self.holding_cell_htlc_updates.iter() {
+                       match htlc {
+                               &HTLCUpdateAwaitingACK::AddHTLC { .. } => their_acked_htlcs += 1,
+                               _ => {},
+                       }
+               }
+
+               self.commit_tx_fee_msat(their_acked_htlcs + addl_htlcs)
+       }
+
+       // Get the commitment tx fee for the remote's next commitment transaction
+       // based on the number of pending HTLCs that are on track to be in their
+       // next commitment tx. `addl_htcs` is an optional parameter allowing the caller
+       // to add a number of additional HTLCs to the calculation. Note that dust HTLCs
+       // are excluded.
+       fn next_remote_commit_tx_fee_msat(&self, addl_htlcs: usize) -> u64 {
+               assert!(!self.channel_outbound);
+
+               // When calculating the set of HTLCs which will be included in their next
+               // commitment_signed, all inbound HTLCs are included (as all states imply it will be
+               // included) and only committed outbound HTLCs, see below.
+               let mut their_acked_htlcs = self.pending_inbound_htlcs.len();
+               for ref htlc in self.pending_outbound_htlcs.iter() {
+                       if htlc.amount_msat / 1000 <= self.counterparty_dust_limit_satoshis {
+                               continue
+                       }
+                       // We only include outbound HTLCs if it will not be included in their next
+                       // commitment_signed, i.e. if they've responded to us with an RAA after announcement.
+                       match htlc.state {
+                               OutboundHTLCState::Committed => their_acked_htlcs += 1,
+                               OutboundHTLCState::RemoteRemoved {..} => their_acked_htlcs += 1,
+                               _ => {},
+                       }
+               }
+
+               self.commit_tx_fee_msat(their_acked_htlcs + addl_htlcs)
+       }
+
+       pub fn update_add_htlc<F, L: Deref>(&mut self, msg: &msgs::UpdateAddHTLC, mut pending_forward_status: PendingHTLCStatus, create_pending_htlc_status: F, logger: &L) -> Result<(), ChannelError>
+       where F: for<'a> Fn(&'a Self, PendingHTLCStatus, u16) -> PendingHTLCStatus, L::Target: Logger {
+               // We can't accept HTLCs sent after we've sent a shutdown.
+               let local_sent_shutdown = (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::LocalShutdownSent as u32)) != (ChannelState::ChannelFunded as u32);
+               if local_sent_shutdown {
+                       pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|20);
+               }
+               // If the remote has sent a shutdown prior to adding this HTLC, then they are in violation of the spec.
+               let remote_sent_shutdown = (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32);
+               if remote_sent_shutdown {
+                       return Err(ChannelError::Close("Got add HTLC message when channel was not in an operational state".to_owned()));
                }
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent update_add_htlc when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent update_add_htlc when we needed a channel_reestablish".to_owned()));
                }
                if msg.amount_msat > self.channel_value_satoshis * 1000 {
-                       return Err(ChannelError::Close("Remote side tried to send more than the total value of the channel"));
+                       return Err(ChannelError::Close("Remote side tried to send more than the total value of the channel".to_owned()));
                }
                if msg.amount_msat == 0 {
-                       return Err(ChannelError::Close("Remote side tried to send a 0-msat HTLC"));
+                       return Err(ChannelError::Close("Remote side tried to send a 0-msat HTLC".to_owned()));
                }
-               if msg.amount_msat < self.our_htlc_minimum_msat {
-                       return Err(ChannelError::Close("Remote side tried to send less than our minimum HTLC value"));
+               if msg.amount_msat < self.holder_htlc_minimum_msat {
+                       return Err(ChannelError::Close(format!("Remote side tried to send less than our minimum HTLC value. Lower limit: ({}). Actual: ({})", self.holder_htlc_minimum_msat, msg.amount_msat)));
                }
 
                let (inbound_htlc_count, htlc_inbound_value_msat) = self.get_inbound_pending_htlc_stats();
                if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 {
-                       return Err(ChannelError::Close("Remote tried to push more than our max accepted HTLCs"));
+                       return Err(ChannelError::Close(format!("Remote tried to push more than our max accepted HTLCs ({})", OUR_MAX_HTLCS)));
                }
-               // Check our_max_htlc_value_in_flight_msat
-               if htlc_inbound_value_msat + msg.amount_msat > Channel::<ChanSigner>::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis) {
-                       return Err(ChannelError::Close("Remote HTLC add would put them over our max HTLC value"));
+               let holder_max_htlc_value_in_flight_msat = Channel::<ChanSigner>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis);
+               if htlc_inbound_value_msat + msg.amount_msat > holder_max_htlc_value_in_flight_msat {
+                       return Err(ChannelError::Close(format!("Remote HTLC add would put them over our max HTLC value ({})", holder_max_htlc_value_in_flight_msat)));
                }
-               // Check our_channel_reserve_satoshis (we're getting paid, so they have to at least meet
+               // Check holder_selected_channel_reserve_satoshis (we're getting paid, so they have to at least meet
                // the reserve_satoshis we told them to always have as direct payment so that they lose
                // something if we punish them for broadcasting an old state).
                // Note that we don't really care about having a small/no to_remote output in our local
@@ -1717,32 +1814,76 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                removed_outbound_total_msat += htlc.amount_msat;
                        }
                }
-               if htlc_inbound_value_msat + msg.amount_msat + self.value_to_self_msat > (self.channel_value_satoshis - Channel::<ChanSigner>::get_our_channel_reserve_satoshis(self.channel_value_satoshis)) * 1000 + removed_outbound_total_msat {
-                       return Err(ChannelError::Close("Remote HTLC add would put them over their reserve value"));
+
+               let pending_value_to_self_msat =
+                       self.value_to_self_msat + htlc_inbound_value_msat - removed_outbound_total_msat;
+               let pending_remote_value_msat =
+                       self.channel_value_satoshis * 1000 - pending_value_to_self_msat;
+               if pending_remote_value_msat < msg.amount_msat {
+                       return Err(ChannelError::Close("Remote HTLC add would overdraw remaining funds".to_owned()));
+               }
+
+               // Check that the remote can afford to pay for this HTLC on-chain at the current
+               // feerate_per_kw, while maintaining their channel reserve (as required by the spec).
+               let remote_commit_tx_fee_msat = if self.channel_outbound { 0 } else {
+                       // +1 for this HTLC.
+                       self.next_remote_commit_tx_fee_msat(1)
+               };
+               if pending_remote_value_msat - msg.amount_msat < remote_commit_tx_fee_msat {
+                       return Err(ChannelError::Close("Remote HTLC add would not leave enough to pay for fees".to_owned()));
+               };
+
+               let chan_reserve_msat =
+                       Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis) * 1000;
+               if pending_remote_value_msat - msg.amount_msat - remote_commit_tx_fee_msat < chan_reserve_msat {
+                       return Err(ChannelError::Close("Remote HTLC add would put them under remote reserve value".to_owned()));
+               }
+
+               if !self.channel_outbound {
+                       // `+1` for this HTLC, `2 *` and `+1` fee spike buffer we keep for the remote. This deviates from the
+                       // spec because in the spec, the fee spike buffer requirement doesn't exist on the receiver's side,
+                       // only on the sender's.
+                       // Note that when we eventually remove support for fee updates and switch to anchor output fees,
+                       // we will drop the `2 *`, since we no longer be as sensitive to fee spikes. But, keep the extra +1
+                       // as we should still be able to afford adding this HTLC plus one more future HTLC, regardless of
+                       // being sensitive to fee spikes.
+                       let remote_fee_cost_incl_stuck_buffer_msat = 2 * self.next_remote_commit_tx_fee_msat(1 + 1);
+                       if pending_remote_value_msat - msg.amount_msat - chan_reserve_msat < remote_fee_cost_incl_stuck_buffer_msat {
+                               // Note that if the pending_forward_status is not updated here, then it's because we're already failing
+                               // the HTLC, i.e. its status is already set to failing.
+                               log_info!(logger, "Attempting to fail HTLC due to fee spike buffer violation");
+                               pending_forward_status = create_pending_htlc_status(self, pending_forward_status, 0x1000|7);
+                       }
+               } else {
+                       // Check that they won't violate our local required channel reserve by adding this HTLC.
+
+                       // +1 for this HTLC.
+                       let local_commit_tx_fee_msat = self.next_local_commit_tx_fee_msat(1);
+                       if self.value_to_self_msat < self.counterparty_selected_channel_reserve_satoshis * 1000 + local_commit_tx_fee_msat {
+                               return Err(ChannelError::Close("Cannot accept HTLC that would put our balance under counterparty-announced channel reserve value".to_owned()));
+                       }
                }
-               if self.next_remote_htlc_id != msg.htlc_id {
-                       return Err(ChannelError::Close("Remote skipped HTLC ID"));
+               if self.next_counterparty_htlc_id != msg.htlc_id {
+                       return Err(ChannelError::Close(format!("Remote skipped HTLC ID (skipped ID: {})", self.next_counterparty_htlc_id)));
                }
                if msg.cltv_expiry >= 500000000 {
-                       return Err(ChannelError::Close("Remote provided CLTV expiry in seconds instead of block height"));
+                       return Err(ChannelError::Close("Remote provided CLTV expiry in seconds instead of block height".to_owned()));
                }
 
-               //TODO: Check msg.cltv_expiry further? Do this in channel manager?
-
                if self.channel_state & ChannelState::LocalShutdownSent as u32 != 0 {
-                       if let PendingHTLCStatus::Forward(_) = pending_forward_state {
+                       if let PendingHTLCStatus::Forward(_) = pending_forward_status {
                                panic!("ChannelManager shouldn't be trying to add a forwardable HTLC after we've started closing");
                        }
                }
 
                // Now update local state:
-               self.next_remote_htlc_id += 1;
+               self.next_counterparty_htlc_id += 1;
                self.pending_inbound_htlcs.push(InboundHTLCOutput {
                        htlc_id: msg.htlc_id,
                        amount_msat: msg.amount_msat,
                        payment_hash: msg.payment_hash,
                        cltv_expiry: msg.cltv_expiry,
-                       state: InboundHTLCState::RemoteAnnounced(pending_forward_state),
+                       state: InboundHTLCState::RemoteAnnounced(pending_forward_status),
                });
                Ok(())
        }
@@ -1756,30 +1897,30 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                        None => {},
                                        Some(payment_hash) =>
                                                if payment_hash != htlc.payment_hash {
-                                                       return Err(ChannelError::Close("Remote tried to fulfill HTLC with an incorrect preimage"));
+                                                       return Err(ChannelError::Close(format!("Remote tried to fulfill HTLC ({}) with an incorrect preimage", htlc_id)));
                                                }
                                };
                                match htlc.state {
                                        OutboundHTLCState::LocalAnnounced(_) =>
-                                               return Err(ChannelError::Close("Remote tried to fulfill/fail HTLC before it had been committed")),
+                                               return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) before it had been committed", htlc_id))),
                                        OutboundHTLCState::Committed => {
                                                htlc.state = OutboundHTLCState::RemoteRemoved(fail_reason);
                                        },
                                        OutboundHTLCState::AwaitingRemoteRevokeToRemove(_) | OutboundHTLCState::AwaitingRemovedRemoteRevoke(_) | OutboundHTLCState::RemoteRemoved(_) =>
-                                               return Err(ChannelError::Close("Remote tried to fulfill/fail HTLC that they'd already fulfilled/failed")),
+                                               return Err(ChannelError::Close(format!("Remote tried to fulfill/fail HTLC ({}) that they'd already fulfilled/failed", htlc_id))),
                                }
                                return Ok(&htlc.source);
                        }
                }
-               Err(ChannelError::Close("Remote tried to fulfill/fail an HTLC we couldn't find"))
+               Err(ChannelError::Close("Remote tried to fulfill/fail an HTLC we couldn't find".to_owned()))
        }
 
        pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result<HTLCSource, ChannelError> {
                if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
-                       return Err(ChannelError::Close("Got fulfill HTLC message when channel was not in an operational state"));
+                       return Err(ChannelError::Close("Got fulfill HTLC message when channel was not in an operational state".to_owned()));
                }
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent update_fulfill_htlc when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent update_fulfill_htlc when we needed a channel_reestablish".to_owned()));
                }
 
                let payment_hash = PaymentHash(Sha256::hash(&msg.payment_preimage.0[..]).into_inner());
@@ -1788,42 +1929,45 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
        pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
                if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
-                       return Err(ChannelError::Close("Got fail HTLC message when channel was not in an operational state"));
+                       return Err(ChannelError::Close("Got fail HTLC message when channel was not in an operational state".to_owned()));
                }
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent update_fail_htlc when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent update_fail_htlc when we needed a channel_reestablish".to_owned()));
                }
 
                self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
                Ok(())
        }
 
-       pub fn update_fail_malformed_htlc<'a>(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
+       pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC, fail_reason: HTLCFailReason) -> Result<(), ChannelError> {
                if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
-                       return Err(ChannelError::Close("Got fail malformed HTLC message when channel was not in an operational state"));
+                       return Err(ChannelError::Close("Got fail malformed HTLC message when channel was not in an operational state".to_owned()));
                }
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent update_fail_malformed_htlc when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent update_fail_malformed_htlc when we needed a channel_reestablish".to_owned()));
                }
 
                self.mark_outbound_htlc_removed(msg.htlc_id, None, Some(fail_reason))?;
                Ok(())
        }
 
-       pub fn commitment_signed<F: Deref>(&mut self, msg: &msgs::CommitmentSigned, fee_estimator: &F) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, Option<msgs::ClosingSigned>, ChannelMonitorUpdate), (Option<ChannelMonitorUpdate>, ChannelError)> where F::Target: FeeEstimator {
+       pub fn commitment_signed<F: Deref, L: Deref>(&mut self, msg: &msgs::CommitmentSigned, fee_estimator: &F, logger: &L) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>, Option<msgs::ClosingSigned>, ChannelMonitorUpdate), (Option<ChannelMonitorUpdate>, ChannelError)>
+       where F::Target: FeeEstimator,
+                               L::Target: Logger
+       {
                if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
-                       return Err((None, ChannelError::Close("Got commitment signed message when channel was not in an operational state")));
+                       return Err((None, ChannelError::Close("Got commitment signed message when channel was not in an operational state".to_owned())));
                }
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err((None, ChannelError::Close("Peer sent commitment_signed when we needed a channel_reestablish")));
+                       return Err((None, ChannelError::Close("Peer sent commitment_signed when we needed a channel_reestablish".to_owned())));
                }
                if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK == BOTH_SIDES_SHUTDOWN_MASK && self.last_sent_closing_fee.is_some() {
-                       return Err((None, ChannelError::Close("Peer sent commitment_signed after we'd started exchanging closing_signeds")));
+                       return Err((None, ChannelError::Close("Peer sent commitment_signed after we'd started exchanging closing_signeds".to_owned())));
                }
 
                let funding_script = self.get_funding_redeemscript();
 
-               let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number).map_err(|e| (None, e))?;
+               let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number).map_err(|e| (None, e))?;
 
                let mut update_fee = false;
                let feerate_per_kw = if !self.channel_outbound && self.pending_update_fee.is_some() {
@@ -1833,44 +1977,45 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        self.feerate_per_kw
                };
 
-               let mut local_commitment_tx = {
-                       let mut commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false, feerate_per_kw);
+               let mut commitment_tx = {
+                       let mut commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, feerate_per_kw, logger);
                        let htlcs_cloned: Vec<_> = commitment_tx.2.drain(..).map(|htlc| (htlc.0, htlc.1.map(|h| h.clone()))).collect();
                        (commitment_tx.0, commitment_tx.1, htlcs_cloned)
                };
-               let local_commitment_txid = local_commitment_tx.0.txid();
-               let local_sighash = hash_to_message!(&bip143::SighashComponents::new(&local_commitment_tx.0).sighash_all(&local_commitment_tx.0.input[0], &funding_script, self.channel_value_satoshis)[..]);
-               log_trace!(self, "Checking commitment tx signature {} by key {} against tx {} with redeemscript {}", log_bytes!(msg.signature.serialize_compact()[..]), log_bytes!(self.their_funding_pubkey().serialize()), encode::serialize_hex(&local_commitment_tx.0), encode::serialize_hex(&funding_script));
-               if let Err(_) = self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey()) {
-                       return Err((None, ChannelError::Close("Invalid commitment tx signature from peer")));
+               let commitment_txid = commitment_tx.0.txid();
+               let sighash = hash_to_message!(&bip143::SigHashCache::new(&commitment_tx.0).signature_hash(0, &funding_script, self.channel_value_satoshis, SigHashType::All)[..]);
+               log_trace!(logger, "Checking commitment tx signature {} by key {} against tx {} (sighash {}) with redeemscript {}", log_bytes!(msg.signature.serialize_compact()[..]), log_bytes!(self.counterparty_funding_pubkey().serialize()), encode::serialize_hex(&commitment_tx.0), log_bytes!(sighash[..]), encode::serialize_hex(&funding_script));
+               if let Err(_) = self.secp_ctx.verify(&sighash, &msg.signature, &self.counterparty_funding_pubkey()) {
+                       return Err((None, ChannelError::Close("Invalid commitment tx signature from peer".to_owned())));
                }
 
                //If channel fee was updated by funder confirm funder can afford the new fee rate when applied to the current local commitment transaction
                if update_fee {
-                       let num_htlcs = local_commitment_tx.1;
-                       let total_fee: u64 = feerate_per_kw as u64 * (COMMITMENT_TX_BASE_WEIGHT + (num_htlcs as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
+                       let num_htlcs = commitment_tx.1;
+                       let total_fee = feerate_per_kw as u64 * (COMMITMENT_TX_BASE_WEIGHT + (num_htlcs as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000;
 
-                       if self.channel_value_satoshis - self.value_to_self_msat / 1000 < total_fee + self.their_channel_reserve_satoshis {
-                               return Err((None, ChannelError::Close("Funding remote cannot afford proposed new fee")));
+                       let counterparty_reserve_we_require = Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
+                       if self.channel_value_satoshis - self.value_to_self_msat / 1000 < total_fee + counterparty_reserve_we_require {
+                               return Err((None, ChannelError::Close("Funding remote cannot afford proposed new fee".to_owned())));
                        }
                }
 
-               if msg.htlc_signatures.len() != local_commitment_tx.1 {
-                       return Err((None, ChannelError::Close("Got wrong number of HTLC signatures from remote")));
+               if msg.htlc_signatures.len() != commitment_tx.1 {
+                       return Err((None, ChannelError::Close(format!("Got wrong number of HTLC signatures ({}) from remote. It must be {}", msg.htlc_signatures.len(), commitment_tx.1))));
                }
 
                // TODO: Merge these two, sadly they are currently both required to be passed separately to
                // ChannelMonitor:
-               let mut htlcs_without_source = Vec::with_capacity(local_commitment_tx.2.len());
-               let mut htlcs_and_sigs = Vec::with_capacity(local_commitment_tx.2.len());
-               for (idx, (htlc, source)) in local_commitment_tx.2.drain(..).enumerate() {
+               let mut htlcs_without_source = Vec::with_capacity(commitment_tx.2.len());
+               let mut htlcs_and_sigs = Vec::with_capacity(commitment_tx.2.len());
+               for (idx, (htlc, source)) in commitment_tx.2.drain(..).enumerate() {
                        if let Some(_) = htlc.transaction_output_index {
-                               let htlc_tx = self.build_htlc_transaction(&local_commitment_txid, &htlc, true, &local_keys, feerate_per_kw);
-                               let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &local_keys);
-                               log_trace!(self, "Checking HTLC tx signature {} by key {} against tx {} with redeemscript {}", log_bytes!(msg.htlc_signatures[idx].serialize_compact()[..]), log_bytes!(local_keys.b_htlc_key.serialize()), encode::serialize_hex(&htlc_tx), encode::serialize_hex(&htlc_redeemscript));
-                               let htlc_sighash = hash_to_message!(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]);
-                               if let Err(_) = self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &local_keys.b_htlc_key) {
-                                       return Err((None, ChannelError::Close("Invalid HTLC tx signature from peer")));
+                               let htlc_tx = self.build_htlc_transaction(&commitment_txid, &htlc, true, &keys, feerate_per_kw);
+                               let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
+                               let htlc_sighash = hash_to_message!(&bip143::SigHashCache::new(&htlc_tx).signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, SigHashType::All)[..]);
+                               log_trace!(logger, "Checking HTLC tx signature {} by key {} against tx {} (sighash {}) with redeemscript {}", log_bytes!(msg.htlc_signatures[idx].serialize_compact()[..]), log_bytes!(keys.countersignatory_htlc_key.serialize()), encode::serialize_hex(&htlc_tx), log_bytes!(htlc_sighash[..]), encode::serialize_hex(&htlc_redeemscript));
+                               if let Err(_) = self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &keys.countersignatory_htlc_key) {
+                                       return Err((None, ChannelError::Close("Invalid HTLC tx signature from peer".to_owned())));
                                }
                                htlcs_without_source.push((htlc.clone(), Some(msg.htlc_signatures[idx])));
                                htlcs_and_sigs.push((htlc, Some(msg.htlc_signatures[idx]), source));
@@ -1880,11 +2025,11 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        }
                }
 
-               let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number - 1));
-               let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed(), self.cur_local_commitment_transaction_number + 1);
+               let next_per_commitment_point = self.holder_keys.get_per_commitment_point(self.cur_holder_commitment_transaction_number - 1, &self.secp_ctx);
+               let per_commitment_secret = self.holder_keys.release_commitment_secret(self.cur_holder_commitment_transaction_number + 1);
 
                // Update state now that we've passed all the can-fail calls...
-               let mut need_our_commitment = false;
+               let mut need_commitment = false;
                if !self.channel_outbound {
                        if let Some(fee_update) = self.pending_update_fee {
                                self.feerate_per_kw = fee_update;
@@ -1892,23 +2037,22 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                // commitment_signed upon receipt of revoke_and_ack, so we can only set it to None
                                // if we're not awaiting a revoke (ie will send a commitment_signed now).
                                if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) == 0 {
-                                       need_our_commitment = true;
+                                       need_commitment = true;
                                        self.pending_update_fee = None;
                                }
                        }
                }
 
-               let their_funding_pubkey = self.their_pubkeys.as_ref().unwrap().funding_pubkey;
+               let counterparty_funding_pubkey = self.counterparty_pubkeys.as_ref().unwrap().funding_pubkey;
 
                self.latest_monitor_update_id += 1;
                let mut monitor_update = ChannelMonitorUpdate {
                        update_id: self.latest_monitor_update_id,
-                       updates: vec![ChannelMonitorUpdateStep::LatestLocalCommitmentTXInfo {
-                               commitment_tx: LocalCommitmentTransaction::new_missing_local_sig(local_commitment_tx.0, &msg.signature, &PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.funding_key()), &their_funding_pubkey, local_keys, self.feerate_per_kw, htlcs_without_source),
+                       updates: vec![ChannelMonitorUpdateStep::LatestHolderCommitmentTXInfo {
+                               commitment_tx: HolderCommitmentTransaction::new_missing_holder_sig(commitment_tx.0, msg.signature.clone(), &self.holder_keys.pubkeys().funding_pubkey, &counterparty_funding_pubkey, keys, self.feerate_per_kw, htlcs_without_source),
                                htlc_outputs: htlcs_and_sigs
                        }]
                };
-               self.channel_monitor.as_mut().unwrap().update_monitor_ooo(monitor_update.clone()).unwrap();
 
                for htlc in self.pending_inbound_htlcs.iter_mut() {
                        let new_forward = if let &InboundHTLCState::RemoteAnnounced(ref forward_info) = &htlc.state {
@@ -1916,7 +2060,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        } else { None };
                        if let Some(forward_info) = new_forward {
                                htlc.state = InboundHTLCState::AwaitingRemoteRevokeToAnnounce(forward_info);
-                               need_our_commitment = true;
+                               need_commitment = true;
                        }
                }
                for htlc in self.pending_outbound_htlcs.iter_mut() {
@@ -1924,12 +2068,12 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                Some(fail_reason.take())
                        } else { None } {
                                htlc.state = OutboundHTLCState::AwaitingRemoteRevokeToRemove(fail_reason);
-                               need_our_commitment = true;
+                               need_commitment = true;
                        }
                }
 
-               self.cur_local_commitment_transaction_number -= 1;
-               // Note that if we need_our_commitment & !AwaitingRemoteRevoke we'll call
+               self.cur_holder_commitment_transaction_number -= 1;
+               // Note that if we need_commitment & !AwaitingRemoteRevoke we'll call
                // send_commitment_no_status_check() next which will reset this to RAAFirst.
                self.resend_order = RAACommitmentOrder::CommitmentFirst;
 
@@ -1937,12 +2081,12 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        // In case we initially failed monitor updating without requiring a response, we need
                        // to make sure the RAA gets sent first.
                        self.monitor_pending_revoke_and_ack = true;
-                       if need_our_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
+                       if need_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
                                // If we were going to send a commitment_signed after the RAA, go ahead and do all
                                // the corresponding HTLC status updates so that get_last_commitment_update
                                // includes the right HTLCs.
                                self.monitor_pending_commitment_signed = true;
-                               let (_, mut additional_update) = self.send_commitment_no_status_check().map_err(|e| (None, e))?;
+                               let (_, mut additional_update) = self.send_commitment_no_status_check(logger).map_err(|e| (None, e))?;
                                // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
                                // strictly increasing by one, so decrement it here.
                                self.latest_monitor_update_id = monitor_update.update_id;
@@ -1950,20 +2094,20 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        }
                        // TODO: Call maybe_propose_first_closing_signed on restoration (or call it here and
                        // re-send the message on restoration)
-                       return Err((Some(monitor_update), ChannelError::Ignore("Previous monitor update failure prevented generation of RAA")));
+                       return Err((Some(monitor_update), ChannelError::Ignore("Previous monitor update failure prevented generation of RAA".to_owned())));
                }
 
-               let (our_commitment_signed, closing_signed) = if need_our_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
+               let (commitment_signed, closing_signed) = if need_commitment && (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == 0 {
                        // If we're AwaitingRemoteRevoke we can't send a new commitment here, but that's ok -
                        // we'll send one right away when we get the revoke_and_ack when we
                        // free_holding_cell_htlcs().
-                       let (msg, mut additional_update) = self.send_commitment_no_status_check().map_err(|e| (None, e))?;
+                       let (msg, mut additional_update) = self.send_commitment_no_status_check(logger).map_err(|e| (None, e))?;
                        // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
                        // strictly increasing by one, so decrement it here.
                        self.latest_monitor_update_id = monitor_update.update_id;
                        monitor_update.updates.append(&mut additional_update.updates);
                        (Some(msg), None)
-               } else if !need_our_commitment {
+               } else if !need_commitment {
                        (None, self.maybe_propose_first_closing_signed(fee_estimator))
                } else { (None, None) };
 
@@ -1971,15 +2115,15 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        channel_id: self.channel_id,
                        per_commitment_secret: per_commitment_secret,
                        next_per_commitment_point: next_per_commitment_point,
-               }, our_commitment_signed, closing_signed, monitor_update))
+               }, commitment_signed, closing_signed, monitor_update))
        }
 
        /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
        /// fulfilling or failing the last pending HTLC)
-       fn free_holding_cell_htlcs(&mut self) -> Result<Option<(msgs::CommitmentUpdate, ChannelMonitorUpdate)>, ChannelError> {
+       fn free_holding_cell_htlcs<L: Deref>(&mut self, logger: &L) -> Result<(Option<(msgs::CommitmentUpdate, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>), ChannelError> where L::Target: Logger {
                assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, 0);
                if self.holding_cell_htlc_updates.len() != 0 || self.holding_cell_update_fee.is_some() {
-                       log_trace!(self, "Freeing holding cell with {} HTLC updates{}", self.holding_cell_htlc_updates.len(), if self.holding_cell_update_fee.is_some() { " and a fee update" } else { "" });
+                       log_trace!(logger, "Freeing holding cell with {} HTLC updates{}", self.holding_cell_htlc_updates.len(), if self.holding_cell_update_fee.is_some() { " and a fee update" } else { "" });
 
                        let mut monitor_update = ChannelMonitorUpdate {
                                update_id: self.latest_monitor_update_id + 1, // We don't increment this yet!
@@ -1991,110 +2135,94 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        let mut update_add_htlcs = Vec::with_capacity(htlc_updates.len());
                        let mut update_fulfill_htlcs = Vec::with_capacity(htlc_updates.len());
                        let mut update_fail_htlcs = Vec::with_capacity(htlc_updates.len());
-                       let mut err = None;
+                       let mut htlcs_to_fail = Vec::new();
                        for htlc_update in htlc_updates.drain(..) {
                                // Note that this *can* fail, though it should be due to rather-rare conditions on
                                // fee races with adding too many outputs which push our total payments just over
                                // the limit. In case it's less rare than I anticipate, we may want to revisit
                                // handling this case better and maybe fulfilling some of the HTLCs while attempting
                                // to rebalance channels.
-                               if err.is_some() { // We're back to AwaitingRemoteRevoke (or are about to fail the channel)
-                                       self.holding_cell_htlc_updates.push(htlc_update);
-                               } else {
-                                       match &htlc_update {
-                                               &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet, ..} => {
-                                                       match self.send_htlc(amount_msat, *payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone()) {
-                                                               Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
-                                                               Err(e) => {
-                                                                       match e {
-                                                                               ChannelError::Ignore(ref msg) => {
-                                                                                       log_info!(self, "Failed to send HTLC with payment_hash {} due to {}", log_bytes!(payment_hash.0), msg);
-                                                                               },
-                                                                               _ => {
-                                                                                       log_info!(self, "Failed to send HTLC with payment_hash {} resulting in a channel closure during holding_cell freeing", log_bytes!(payment_hash.0));
-                                                                               },
-                                                                       }
-                                                                       err = Some(e);
+                               match &htlc_update {
+                                       &HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet, ..} => {
+                                               match self.send_htlc(amount_msat, *payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone()) {
+                                                       Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
+                                                       Err(e) => {
+                                                               match e {
+                                                                       ChannelError::Ignore(ref msg) => {
+                                                                               log_info!(logger, "Failed to send HTLC with payment_hash {} due to {}", log_bytes!(payment_hash.0), msg);
+                                                                               // If we fail to send here, then this HTLC should
+                                                                               // be failed backwards. Failing to send here
+                                                                               // indicates that this HTLC may keep being put back
+                                                                               // into the holding cell without ever being
+                                                                               // successfully forwarded/failed/fulfilled, causing
+                                                                               // our counterparty to eventually close on us.
+                                                                               htlcs_to_fail.push((source.clone(), *payment_hash));
+                                                                       },
+                                                                       _ => {
+                                                                               panic!("Got a non-IgnoreError action trying to send holding cell HTLC");
+                                                                       },
                                                                }
                                                        }
-                                               },
-                                               &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, htlc_id, .. } => {
-                                                       match self.get_update_fulfill_htlc(htlc_id, *payment_preimage) {
-                                                               Ok((update_fulfill_msg_option, additional_monitor_update_opt)) => {
-                                                                       update_fulfill_htlcs.push(update_fulfill_msg_option.unwrap());
-                                                                       if let Some(mut additional_monitor_update) = additional_monitor_update_opt {
-                                                                               monitor_update.updates.append(&mut additional_monitor_update.updates);
-                                                                       }
-                                                               },
-                                                               Err(e) => {
-                                                                       if let ChannelError::Ignore(_) = e {}
-                                                                       else {
-                                                                               panic!("Got a non-IgnoreError action trying to fulfill holding cell HTLC");
-                                                                       }
+                                               }
+                                       },
+                                       &HTLCUpdateAwaitingACK::ClaimHTLC { ref payment_preimage, htlc_id, .. } => {
+                                               match self.get_update_fulfill_htlc(htlc_id, *payment_preimage, logger) {
+                                                       Ok((update_fulfill_msg_option, additional_monitor_update_opt)) => {
+                                                               update_fulfill_htlcs.push(update_fulfill_msg_option.unwrap());
+                                                               if let Some(mut additional_monitor_update) = additional_monitor_update_opt {
+                                                                       monitor_update.updates.append(&mut additional_monitor_update.updates);
+                                                               }
+                                                       },
+                                                       Err(e) => {
+                                                               if let ChannelError::Ignore(_) = e {}
+                                                               else {
+                                                                       panic!("Got a non-IgnoreError action trying to fulfill holding cell HTLC");
                                                                }
                                                        }
-                                               },
-                                               &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
-                                                       match self.get_update_fail_htlc(htlc_id, err_packet.clone()) {
-                                                               Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
-                                                               Err(e) => {
-                                                                       if let ChannelError::Ignore(_) = e {}
-                                                                       else {
-                                                                               panic!("Got a non-IgnoreError action trying to fail holding cell HTLC");
-                                                                       }
+                                               }
+                                       },
+                                       &HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
+                                               match self.get_update_fail_htlc(htlc_id, err_packet.clone()) {
+                                                       Ok(update_fail_msg_option) => update_fail_htlcs.push(update_fail_msg_option.unwrap()),
+                                                       Err(e) => {
+                                                               if let ChannelError::Ignore(_) = e {}
+                                                               else {
+                                                                       panic!("Got a non-IgnoreError action trying to fail holding cell HTLC");
                                                                }
                                                        }
-                                               },
-                                       }
-                                       if err.is_some() {
-                                               self.holding_cell_htlc_updates.push(htlc_update);
-                                               if let Some(ChannelError::Ignore(_)) = err {
-                                                       // If we failed to add the HTLC, but got an Ignore error, we should
-                                                       // still send the new commitment_signed, so reset the err to None.
-                                                       err = None;
                                                }
-                                       }
+                                       },
                                }
                        }
-                       //TODO: Need to examine the type of err - if it's a fee issue or similar we may want to
-                       //fail it back the route, if it's a temporary issue we can ignore it...
-                       match err {
-                               None => {
-                                       if update_add_htlcs.is_empty() && update_fulfill_htlcs.is_empty() && update_fail_htlcs.is_empty() && self.holding_cell_update_fee.is_none() {
-                                               // This should never actually happen and indicates we got some Errs back
-                                               // from update_fulfill_htlc/update_fail_htlc, but we handle it anyway in
-                                               // case there is some strange way to hit duplicate HTLC removes.
-                                               return Ok(None);
-                                       }
-                                       let update_fee = if let Some(feerate) = self.holding_cell_update_fee {
-                                                       self.pending_update_fee = self.holding_cell_update_fee.take();
-                                                       Some(msgs::UpdateFee {
-                                                               channel_id: self.channel_id,
-                                                               feerate_per_kw: feerate as u32,
-                                                       })
-                                               } else {
-                                                       None
-                                               };
+                       if update_add_htlcs.is_empty() && update_fulfill_htlcs.is_empty() && update_fail_htlcs.is_empty() && self.holding_cell_update_fee.is_none() {
+                               return Ok((None, htlcs_to_fail));
+                       }
+                       let update_fee = if let Some(feerate) = self.holding_cell_update_fee {
+                               self.pending_update_fee = self.holding_cell_update_fee.take();
+                               Some(msgs::UpdateFee {
+                                       channel_id: self.channel_id,
+                                       feerate_per_kw: feerate as u32,
+                               })
+                       } else {
+                               None
+                       };
 
-                                       let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check()?;
-                                       // send_commitment_no_status_check and get_update_fulfill_htlc may bump latest_monitor_id
-                                       // but we want them to be strictly increasing by one, so reset it here.
-                                       self.latest_monitor_update_id = monitor_update.update_id;
-                                       monitor_update.updates.append(&mut additional_update.updates);
+                       let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check(logger)?;
+                       // send_commitment_no_status_check and get_update_fulfill_htlc may bump latest_monitor_id
+                       // but we want them to be strictly increasing by one, so reset it here.
+                       self.latest_monitor_update_id = monitor_update.update_id;
+                       monitor_update.updates.append(&mut additional_update.updates);
 
-                                       Ok(Some((msgs::CommitmentUpdate {
-                                               update_add_htlcs,
-                                               update_fulfill_htlcs,
-                                               update_fail_htlcs,
-                                               update_fail_malformed_htlcs: Vec::new(),
-                                               update_fee: update_fee,
-                                               commitment_signed,
-                                       }, monitor_update)))
-                               },
-                               Some(e) => Err(e)
-                       }
+                       Ok((Some((msgs::CommitmentUpdate {
+                               update_add_htlcs,
+                               update_fulfill_htlcs,
+                               update_fail_htlcs,
+                               update_fail_malformed_htlcs: Vec::new(),
+                               update_fee: update_fee,
+                               commitment_signed,
+                       }, monitor_update)), htlcs_to_fail))
                } else {
-                       Ok(None)
+                       Ok((None, Vec::new()))
                }
        }
 
@@ -2103,22 +2231,23 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail,
        /// generating an appropriate error *after* the channel state has been updated based on the
        /// revoke_and_ack message.
-       pub fn revoke_and_ack<F: Deref>(&mut self, msg: &msgs::RevokeAndACK, fee_estimator: &F) -> Result<(Option<msgs::CommitmentUpdate>, Vec<(PendingHTLCInfo, u64)>, Vec<(HTLCSource, PaymentHash, HTLCFailReason)>, Option<msgs::ClosingSigned>, ChannelMonitorUpdate), ChannelError>
-               where F::Target: FeeEstimator
+       pub fn revoke_and_ack<F: Deref, L: Deref>(&mut self, msg: &msgs::RevokeAndACK, fee_estimator: &F, logger: &L) -> Result<(Option<msgs::CommitmentUpdate>, Vec<(PendingHTLCInfo, u64)>, Vec<(HTLCSource, PaymentHash, HTLCFailReason)>, Option<msgs::ClosingSigned>, ChannelMonitorUpdate, Vec<(HTLCSource, PaymentHash)>), ChannelError>
+               where F::Target: FeeEstimator,
+                                       L::Target: Logger,
        {
                if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
-                       return Err(ChannelError::Close("Got revoke/ACK message when channel was not in an operational state"));
+                       return Err(ChannelError::Close("Got revoke/ACK message when channel was not in an operational state".to_owned()));
                }
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent revoke_and_ack when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent revoke_and_ack when we needed a channel_reestablish".to_owned()));
                }
                if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK == BOTH_SIDES_SHUTDOWN_MASK && self.last_sent_closing_fee.is_some() {
-                       return Err(ChannelError::Close("Peer sent revoke_and_ack after we'd started exchanging closing_signeds"));
+                       return Err(ChannelError::Close("Peer sent revoke_and_ack after we'd started exchanging closing_signeds".to_owned()));
                }
 
-               if let Some(their_prev_commitment_point) = self.their_prev_commitment_point {
-                       if PublicKey::from_secret_key(&self.secp_ctx, &secp_check!(SecretKey::from_slice(&msg.per_commitment_secret), "Peer provided an invalid per_commitment_secret")) != their_prev_commitment_point {
-                               return Err(ChannelError::Close("Got a revoke commitment secret which didn't correspond to their current pubkey"));
+               if let Some(counterparty_prev_commitment_point) = self.counterparty_prev_commitment_point {
+                       if PublicKey::from_secret_key(&self.secp_ctx, &secp_check!(SecretKey::from_slice(&msg.per_commitment_secret), "Peer provided an invalid per_commitment_secret".to_owned())) != counterparty_prev_commitment_point {
+                               return Err(ChannelError::Close("Got a revoke commitment secret which didn't correspond to their current pubkey".to_owned()));
                        }
                }
 
@@ -2130,31 +2259,30 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        // lot of work, and there's some chance this is all a misunderstanding anyway.
                        // We have to do *something*, though, since our signer may get mad at us for otherwise
                        // jumping a remote commitment number, so best to just force-close and move on.
-                       return Err(ChannelError::Close("Received an unexpected revoke_and_ack"));
+                       return Err(ChannelError::Close("Received an unexpected revoke_and_ack".to_owned()));
                }
 
-               self.commitment_secrets.provide_secret(self.cur_remote_commitment_transaction_number + 1, msg.per_commitment_secret)
-                       .map_err(|_| ChannelError::Close("Previous secrets did not match new one"))?;
+               self.commitment_secrets.provide_secret(self.cur_counterparty_commitment_transaction_number + 1, msg.per_commitment_secret)
+                       .map_err(|_| ChannelError::Close("Previous secrets did not match new one".to_owned()))?;
                self.latest_monitor_update_id += 1;
                let mut monitor_update = ChannelMonitorUpdate {
                        update_id: self.latest_monitor_update_id,
                        updates: vec![ChannelMonitorUpdateStep::CommitmentSecret {
-                               idx: self.cur_remote_commitment_transaction_number + 1,
+                               idx: self.cur_counterparty_commitment_transaction_number + 1,
                                secret: msg.per_commitment_secret,
                        }],
                };
-               self.channel_monitor.as_mut().unwrap().update_monitor_ooo(monitor_update.clone()).unwrap();
 
                // Update state now that we've passed all the can-fail calls...
                // (note that we may still fail to generate the new commitment_signed message, but that's
                // OK, we step the channel here and *then* if the new generation fails we can fail the
                // channel based on that, but stepping stuff here should be safe either way.
                self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32);
-               self.their_prev_commitment_point = self.their_cur_commitment_point;
-               self.their_cur_commitment_point = Some(msg.next_per_commitment_point);
-               self.cur_remote_commitment_transaction_number -= 1;
+               self.counterparty_prev_commitment_point = self.counterparty_cur_commitment_point;
+               self.counterparty_cur_commitment_point = Some(msg.next_per_commitment_point);
+               self.cur_counterparty_commitment_transaction_number -= 1;
 
-               log_trace!(self, "Updating HTLCs on receipt of RAA...");
+               log_trace!(logger, "Updating HTLCs on receipt of RAA...");
                let mut to_forward_infos = Vec::new();
                let mut revoked_htlcs = Vec::new();
                let mut update_fail_htlcs = Vec::new();
@@ -2166,7 +2294,6 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        // Take references explicitly so that we can hold multiple references to self.
                        let pending_inbound_htlcs: &mut Vec<_> = &mut self.pending_inbound_htlcs;
                        let pending_outbound_htlcs: &mut Vec<_> = &mut self.pending_outbound_htlcs;
-                       let logger = LogHolder { logger: &self.logger };
 
                        // We really shouldnt have two passes here, but retain gives a non-mutable ref (Rust bug)
                        pending_inbound_htlcs.retain(|htlc| {
@@ -2270,7 +2397,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                // When the monitor updating is restored we'll call get_last_commitment_update(),
                                // which does not update state, but we're definitely now awaiting a remote revoke
                                // before we can step forward any more, so set it here.
-                               let (_, mut additional_update) = self.send_commitment_no_status_check()?;
+                               let (_, mut additional_update) = self.send_commitment_no_status_check(logger)?;
                                // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
                                // strictly increasing by one, so decrement it here.
                                self.latest_monitor_update_id = monitor_update.update_id;
@@ -2278,11 +2405,11 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        }
                        self.monitor_pending_forwards.append(&mut to_forward_infos);
                        self.monitor_pending_failures.append(&mut revoked_htlcs);
-                       return Ok((None, Vec::new(), Vec::new(), None, monitor_update))
+                       return Ok((None, Vec::new(), Vec::new(), None, monitor_update, Vec::new()))
                }
 
-               match self.free_holding_cell_htlcs()? {
-                       Some((mut commitment_update, mut additional_update)) => {
+               match self.free_holding_cell_htlcs(logger)? {
+                       (Some((mut commitment_update, mut additional_update)), htlcs_to_fail) => {
                                commitment_update.update_fail_htlcs.reserve(update_fail_htlcs.len());
                                for fail_msg in update_fail_htlcs.drain(..) {
                                        commitment_update.update_fail_htlcs.push(fail_msg);
@@ -2297,11 +2424,11 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                self.latest_monitor_update_id = monitor_update.update_id;
                                monitor_update.updates.append(&mut additional_update.updates);
 
-                               Ok((Some(commitment_update), to_forward_infos, revoked_htlcs, None, monitor_update))
+                               Ok((Some(commitment_update), to_forward_infos, revoked_htlcs, None, monitor_update, htlcs_to_fail))
                        },
-                       None => {
+                       (None, htlcs_to_fail) => {
                                if require_commitment {
-                                       let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check()?;
+                                       let (commitment_signed, mut additional_update) = self.send_commitment_no_status_check(logger)?;
 
                                        // send_commitment_no_status_check may bump latest_monitor_id but we want them to be
                                        // strictly increasing by one, so decrement it here.
@@ -2315,9 +2442,9 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                                update_fail_malformed_htlcs,
                                                update_fee: None,
                                                commitment_signed
-                                       }), to_forward_infos, revoked_htlcs, None, monitor_update))
+                                       }), to_forward_infos, revoked_htlcs, None, monitor_update, htlcs_to_fail))
                                } else {
-                                       Ok((None, to_forward_infos, revoked_htlcs, self.maybe_propose_first_closing_signed(fee_estimator), monitor_update))
+                                       Ok((None, to_forward_infos, revoked_htlcs, self.maybe_propose_first_closing_signed(fee_estimator), monitor_update, htlcs_to_fail))
                                }
                        }
                }
@@ -2327,7 +2454,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// Adds a pending update to this channel. See the doc for send_htlc for
        /// further details on the optionness of the return value.
        /// You MUST call send_commitment prior to any other calls on this Channel
-       fn send_update_fee(&mut self, feerate_per_kw: u64) -> Option<msgs::UpdateFee> {
+       fn send_update_fee(&mut self, feerate_per_kw: u32) -> Option<msgs::UpdateFee> {
                if !self.channel_outbound {
                        panic!("Cannot send fee from inbound channel");
                }
@@ -2348,14 +2475,14 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
                Some(msgs::UpdateFee {
                        channel_id: self.channel_id,
-                       feerate_per_kw: feerate_per_kw as u32,
+                       feerate_per_kw: feerate_per_kw,
                })
        }
 
-       pub fn send_update_fee_and_commit(&mut self, feerate_per_kw: u64) -> Result<Option<(msgs::UpdateFee, msgs::CommitmentSigned, ChannelMonitorUpdate)>, ChannelError> {
+       pub fn send_update_fee_and_commit<L: Deref>(&mut self, feerate_per_kw: u32, logger: &L) -> Result<Option<(msgs::UpdateFee, msgs::CommitmentSigned, ChannelMonitorUpdate)>, ChannelError> where L::Target: Logger {
                match self.send_update_fee(feerate_per_kw) {
                        Some(update_fee) => {
-                               let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
+                               let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
                                Ok(Some((update_fee, commitment_signed, monitor_update)))
                        },
                        None => Ok(None)
@@ -2368,7 +2495,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// implicitly dropping) and the payment_hashes of HTLCs we tried to add but are dropping.
        /// No further message handling calls may be made until a channel_reestablish dance has
        /// completed.
-       pub fn remove_uncommitted_htlcs_and_mark_paused(&mut self) -> Vec<(HTLCSource, PaymentHash)> {
+       pub fn remove_uncommitted_htlcs_and_mark_paused<L: Deref>(&mut self, logger: &L) -> Vec<(HTLCSource, PaymentHash)> where L::Target: Logger {
                let mut outbound_drops = Vec::new();
 
                assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
@@ -2406,7 +2533,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                },
                        }
                });
-               self.next_remote_htlc_id -= inbound_drop_count;
+               self.next_counterparty_htlc_id -= inbound_drop_count;
 
                for htlc in self.pending_outbound_htlcs.iter_mut() {
                        if let OutboundHTLCState::RemoteRemoved(_) = htlc.state {
@@ -2419,6 +2546,11 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
                self.holding_cell_htlc_updates.retain(|htlc_update| {
                        match htlc_update {
+                               // Note that currently on channel reestablish we assert that there are
+                               // no holding cell HTLC update_adds, so if in the future we stop
+                               // dropping added HTLCs here and failing them backwards, then there will
+                               // need to be corresponding changes made in the Channel's re-establish
+                               // logic.
                                &HTLCUpdateAwaitingACK::AddHTLC { ref payment_hash, ref source, .. } => {
                                        outbound_drops.push((source.clone(), payment_hash.clone()));
                                        false
@@ -2427,7 +2559,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        }
                });
                self.channel_state |= ChannelState::PeerDisconnected as u32;
-               log_debug!(self, "Peer disconnection resulted in {} remote-announced HTLC drops and {} waiting-to-locally-announced HTLC drops on channel {}", outbound_drops.len(), inbound_drop_count, log_bytes!(self.channel_id()));
+               log_debug!(logger, "Peer disconnection resulted in {} remote-announced HTLC drops and {} waiting-to-locally-announced HTLC drops on channel {}", outbound_drops.len(), inbound_drop_count, log_bytes!(self.channel_id()));
                outbound_drops
        }
 
@@ -2451,7 +2583,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// Indicates that the latest ChannelMonitor update has been committed by the client
        /// successfully and we should restore normal operation. Returns messages which should be sent
        /// to the remote side.
-       pub fn monitor_updating_restored(&mut self) -> (Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, RAACommitmentOrder, Vec<(PendingHTLCInfo, u64)>, Vec<(HTLCSource, PaymentHash, HTLCFailReason)>, bool, Option<msgs::FundingLocked>) {
+       pub fn monitor_updating_restored<L: Deref>(&mut self, logger: &L) -> (Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, RAACommitmentOrder, Vec<(PendingHTLCInfo, u64)>, Vec<(HTLCSource, PaymentHash, HTLCFailReason)>, bool, Option<msgs::FundingLocked>) where L::Target: Logger {
                assert_eq!(self.channel_state & ChannelState::MonitorUpdateFailed as u32, ChannelState::MonitorUpdateFailed as u32);
                self.channel_state &= !(ChannelState::MonitorUpdateFailed as u32);
 
@@ -2466,8 +2598,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                let funding_locked = if self.monitor_pending_funding_locked {
                        assert!(!self.channel_outbound, "Funding transaction broadcast without FundingBroadcastSafe!");
                        self.monitor_pending_funding_locked = false;
-                       let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
-                       let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
+                       let next_per_commitment_point = self.holder_keys.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
                        Some(msgs::FundingLocked {
                                channel_id: self.channel_id(),
                                next_per_commitment_point: next_per_commitment_point,
@@ -2489,13 +2620,13 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        Some(self.get_last_revoke_and_ack())
                } else { None };
                let commitment_update = if self.monitor_pending_commitment_signed {
-                       Some(self.get_last_commitment_update())
+                       Some(self.get_last_commitment_update(logger))
                } else { None };
 
                self.monitor_pending_revoke_and_ack = false;
                self.monitor_pending_commitment_signed = false;
                let order = self.resend_order.clone();
-               log_trace!(self, "Restored monitor updating resulting in {}{} commitment update and {} RAA, with {} first",
+               log_trace!(logger, "Restored monitor updating resulting in {}{} commitment update and {} RAA, with {} first",
                        if needs_broadcast_safe { "a funding broadcast safe, " } else { "" },
                        if commitment_update.is_some() { "a" } else { "no" },
                        if raa.is_some() { "an" } else { "no" },
@@ -2507,20 +2638,20 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                where F::Target: FeeEstimator
        {
                if self.channel_outbound {
-                       return Err(ChannelError::Close("Non-funding remote tried to update channel fee"));
+                       return Err(ChannelError::Close("Non-funding remote tried to update channel fee".to_owned()));
                }
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent update_fee when we needed a channel_reestablish".to_owned()));
                }
                Channel::<ChanSigner>::check_remote_fee(fee_estimator, msg.feerate_per_kw)?;
-               self.pending_update_fee = Some(msg.feerate_per_kw as u64);
+               self.pending_update_fee = Some(msg.feerate_per_kw);
                self.update_time_counter += 1;
                Ok(())
        }
 
        fn get_last_revoke_and_ack(&self) -> msgs::RevokeAndACK {
-               let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number));
-               let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed(), self.cur_local_commitment_transaction_number + 2);
+               let next_per_commitment_point = self.holder_keys.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
+               let per_commitment_secret = self.holder_keys.release_commitment_secret(self.cur_holder_commitment_transaction_number + 2);
                msgs::RevokeAndACK {
                        channel_id: self.channel_id,
                        per_commitment_secret,
@@ -2528,7 +2659,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                }
        }
 
-       fn get_last_commitment_update(&self) -> msgs::CommitmentUpdate {
+       fn get_last_commitment_update<L: Deref>(&self, logger: &L) -> msgs::CommitmentUpdate where L::Target: Logger {
                let mut update_add_htlcs = Vec::new();
                let mut update_fulfill_htlcs = Vec::new();
                let mut update_fail_htlcs = Vec::new();
@@ -2576,49 +2707,43 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        }
                }
 
-               log_trace!(self, "Regenerated latest commitment update with {} update_adds, {} update_fulfills, {} update_fails, and {} update_fail_malformeds",
+               log_trace!(logger, "Regenerated latest commitment update with {} update_adds, {} update_fulfills, {} update_fails, and {} update_fail_malformeds",
                                update_add_htlcs.len(), update_fulfill_htlcs.len(), update_fail_htlcs.len(), update_fail_malformed_htlcs.len());
                msgs::CommitmentUpdate {
                        update_add_htlcs, update_fulfill_htlcs, update_fail_htlcs, update_fail_malformed_htlcs,
                        update_fee: None,
-                       commitment_signed: self.send_commitment_no_state_update().expect("It looks like we failed to re-generate a commitment_signed we had previously sent?").0,
+                       commitment_signed: self.send_commitment_no_state_update(logger).expect("It looks like we failed to re-generate a commitment_signed we had previously sent?").0,
                }
        }
 
        /// May panic if some calls other than message-handling calls (which will all Err immediately)
        /// have been called between remove_uncommitted_htlcs_and_mark_paused and this call.
-       pub fn channel_reestablish(&mut self, msg: &msgs::ChannelReestablish) -> Result<(Option<msgs::FundingLocked>, Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, Option<ChannelMonitorUpdate>, RAACommitmentOrder, Option<msgs::Shutdown>), ChannelError> {
+       pub fn channel_reestablish<L: Deref>(&mut self, msg: &msgs::ChannelReestablish, logger: &L) -> Result<(Option<msgs::FundingLocked>, Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>, Option<ChannelMonitorUpdate>, RAACommitmentOrder, Option<msgs::Shutdown>), ChannelError> where L::Target: Logger {
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == 0 {
                        // While BOLT 2 doesn't indicate explicitly we should error this channel here, it
                        // almost certainly indicates we are going to end up out-of-sync in some way, so we
                        // just close here instead of trying to recover.
-                       return Err(ChannelError::Close("Peer sent a loose channel_reestablish not after reconnect"));
+                       return Err(ChannelError::Close("Peer sent a loose channel_reestablish not after reconnect".to_owned()));
                }
 
                if msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER ||
                        msg.next_local_commitment_number == 0 {
-                       return Err(ChannelError::Close("Peer sent a garbage channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent a garbage channel_reestablish".to_owned()));
                }
 
                if msg.next_remote_commitment_number > 0 {
                        match msg.data_loss_protect {
                                OptionalField::Present(ref data_loss) => {
-                                       if chan_utils::build_commitment_secret(self.local_keys.commitment_seed(), INITIAL_COMMITMENT_NUMBER - msg.next_remote_commitment_number + 1) != data_loss.your_last_per_commitment_secret {
-                                               return Err(ChannelError::Close("Peer sent a garbage channel_reestablish with secret key not matching the commitment height provided"));
+                                       let expected_point = self.holder_keys.get_per_commitment_point(INITIAL_COMMITMENT_NUMBER - msg.next_remote_commitment_number + 1, &self.secp_ctx);
+                                       let given_secret = SecretKey::from_slice(&data_loss.your_last_per_commitment_secret)
+                                               .map_err(|_| ChannelError::Close("Peer sent a garbage channel_reestablish with unparseable secret key".to_owned()))?;
+                                       if expected_point != PublicKey::from_secret_key(&self.secp_ctx, &given_secret) {
+                                               return Err(ChannelError::Close("Peer sent a garbage channel_reestablish with secret key not matching the commitment height provided".to_owned()));
                                        }
-                                       if msg.next_remote_commitment_number > INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number {
-                                               self.latest_monitor_update_id += 1;
-                                               let monitor_update = ChannelMonitorUpdate {
-                                                       update_id: self.latest_monitor_update_id,
-                                                       updates: vec![ChannelMonitorUpdateStep::RescueRemoteCommitmentTXInfo {
-                                                               their_current_per_commitment_point: data_loss.my_current_per_commitment_point
-                                                       }]
-                                               };
-                                               self.channel_monitor.as_mut().unwrap().update_monitor_ooo(monitor_update.clone()).unwrap();
-                                               return Err(ChannelError::CloseDelayBroadcast {
-                                                       msg: "We have fallen behind - we have received proof that if we broadcast remote is going to claim our funds - we can't do any automated broadcasting",
-                                                       update: monitor_update
-                                               });
+                                       if msg.next_remote_commitment_number > INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
+                                               return Err(ChannelError::CloseDelayBroadcast(
+                                                       "We have fallen behind - we have received proof that if we broadcast remote is going to claim our funds - we can't do any automated broadcasting".to_owned()
+                                               ));
                                        }
                                },
                                OptionalField::Absent => {}
@@ -2641,26 +2766,25 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        if self.channel_state & (ChannelState::OurFundingLocked as u32) == 0 ||
                                        self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
                                if msg.next_remote_commitment_number != 0 {
-                                       return Err(ChannelError::Close("Peer claimed they saw a revoke_and_ack but we haven't sent funding_locked yet"));
+                                       return Err(ChannelError::Close("Peer claimed they saw a revoke_and_ack but we haven't sent funding_locked yet".to_owned()));
                                }
                                // Short circuit the whole handler as there is nothing we can resend them
                                return Ok((None, None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
                        }
 
                        // We have OurFundingLocked set!
-                       let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
-                       let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
+                       let next_per_commitment_point = self.holder_keys.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
                        return Ok((Some(msgs::FundingLocked {
                                channel_id: self.channel_id(),
                                next_per_commitment_point: next_per_commitment_point,
                        }), None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
                }
 
-               let required_revoke = if msg.next_remote_commitment_number + 1 == INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number {
+               let required_revoke = if msg.next_remote_commitment_number + 1 == INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number {
                        // Remote isn't waiting on any RevokeAndACK from us!
                        // Note that if we need to repeat our FundingLocked we'll do that in the next if block.
                        None
-               } else if msg.next_remote_commitment_number + 1 == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_local_commitment_transaction_number {
+               } else if msg.next_remote_commitment_number + 1 == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_holder_commitment_transaction_number {
                        if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
                                self.monitor_pending_revoke_and_ack = true;
                                None
@@ -2668,51 +2792,68 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                Some(self.get_last_revoke_and_ack())
                        }
                } else {
-                       return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old local commitment transaction"));
+                       return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old local commitment transaction".to_owned()));
                };
 
-               // We increment cur_remote_commitment_transaction_number only upon receipt of
+               // We increment cur_counterparty_commitment_transaction_number only upon receipt of
                // revoke_and_ack, not on sending commitment_signed, so we add one if have
                // AwaitingRemoteRevoke set, which indicates we sent a commitment_signed but haven't gotten
                // the corresponding revoke_and_ack back yet.
-               let our_next_remote_commitment_number = INITIAL_COMMITMENT_NUMBER - self.cur_remote_commitment_transaction_number + if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 };
+               let next_counterparty_commitment_number = INITIAL_COMMITMENT_NUMBER - self.cur_counterparty_commitment_transaction_number + if (self.channel_state & ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 };
 
-               let resend_funding_locked = if msg.next_local_commitment_number == 1 && INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number == 1 {
+               let resend_funding_locked = if msg.next_local_commitment_number == 1 && INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number == 1 {
                        // We should never have to worry about MonitorUpdateFailed resending FundingLocked
-                       let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
-                       let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
+                       let next_per_commitment_point = self.holder_keys.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
                        Some(msgs::FundingLocked {
                                channel_id: self.channel_id(),
                                next_per_commitment_point: next_per_commitment_point,
                        })
                } else { None };
 
-               if msg.next_local_commitment_number == our_next_remote_commitment_number {
+               if msg.next_local_commitment_number == next_counterparty_commitment_number {
                        if required_revoke.is_some() {
-                               log_debug!(self, "Reconnected channel {} with only lost outbound RAA", log_bytes!(self.channel_id()));
+                               log_debug!(logger, "Reconnected channel {} with only lost outbound RAA", log_bytes!(self.channel_id()));
                        } else {
-                               log_debug!(self, "Reconnected channel {} with no loss", log_bytes!(self.channel_id()));
+                               log_debug!(logger, "Reconnected channel {} with no loss", log_bytes!(self.channel_id()));
                        }
 
                        if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::MonitorUpdateFailed as u32)) == 0 {
+                               // Note that if in the future we no longer drop holding cell update_adds on peer
+                               // disconnect, this logic will need to be updated.
+                               for htlc_update in self.holding_cell_htlc_updates.iter() {
+                                       if let &HTLCUpdateAwaitingACK::AddHTLC { .. } = htlc_update {
+                                               debug_assert!(false, "There shouldn't be any add-HTLCs in the holding cell now because they should have been dropped on peer disconnect. Panic here because said HTLCs won't be handled correctly.");
+                                       }
+                               }
+
                                // We're up-to-date and not waiting on a remote revoke (if we are our
                                // channel_reestablish should result in them sending a revoke_and_ack), but we may
                                // have received some updates while we were disconnected. Free the holding cell
                                // now!
-                               match self.free_holding_cell_htlcs() {
+                               match self.free_holding_cell_htlcs(logger) {
                                        Err(ChannelError::Close(msg)) => return Err(ChannelError::Close(msg)),
-                                       Err(ChannelError::Ignore(_)) | Err(ChannelError::CloseDelayBroadcast { .. }) => panic!("Got non-channel-failing result from free_holding_cell_htlcs"),
-                                       Ok(Some((commitment_update, monitor_update))) => return Ok((resend_funding_locked, required_revoke, Some(commitment_update), Some(monitor_update), self.resend_order.clone(), shutdown_msg)),
-                                       Ok(None) => return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), shutdown_msg)),
+                                       Err(ChannelError::Ignore(_)) | Err(ChannelError::CloseDelayBroadcast(_)) => panic!("Got non-channel-failing result from free_holding_cell_htlcs"),
+                                       Ok((Some((commitment_update, monitor_update)), htlcs_to_fail)) => {
+                                               // If in the future we no longer drop holding cell update_adds on peer
+                                               // disconnect, we may be handed some HTLCs to fail backwards here.
+                                               assert!(htlcs_to_fail.is_empty());
+                                               return Ok((resend_funding_locked, required_revoke, Some(commitment_update), Some(monitor_update), self.resend_order.clone(), shutdown_msg));
+                                       },
+                                       Ok((None, htlcs_to_fail)) => {
+                                               // If in the future we no longer drop holding cell update_adds on peer
+                                               // disconnect, we may be handed some HTLCs to fail backwards here.
+                                               assert!(htlcs_to_fail.is_empty());
+                                               return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), shutdown_msg));
+                                       },
                                }
                        } else {
                                return Ok((resend_funding_locked, required_revoke, None, None, self.resend_order.clone(), shutdown_msg));
                        }
-               } else if msg.next_local_commitment_number == our_next_remote_commitment_number - 1 {
+               } else if msg.next_local_commitment_number == next_counterparty_commitment_number - 1 {
                        if required_revoke.is_some() {
-                               log_debug!(self, "Reconnected channel {} with lost outbound RAA and lost remote commitment tx", log_bytes!(self.channel_id()));
+                               log_debug!(logger, "Reconnected channel {} with lost outbound RAA and lost remote commitment tx", log_bytes!(self.channel_id()));
                        } else {
-                               log_debug!(self, "Reconnected channel {} with only lost remote commitment tx", log_bytes!(self.channel_id()));
+                               log_debug!(logger, "Reconnected channel {} with only lost remote commitment tx", log_bytes!(self.channel_id()));
                        }
 
                        if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
@@ -2720,9 +2861,9 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                return Ok((resend_funding_locked, None, None, None, self.resend_order.clone(), shutdown_msg));
                        }
 
-                       return Ok((resend_funding_locked, required_revoke, Some(self.get_last_commitment_update()), None, self.resend_order.clone(), shutdown_msg));
+                       return Ok((resend_funding_locked, required_revoke, Some(self.get_last_commitment_update(logger)), None, self.resend_order.clone(), shutdown_msg));
                } else {
-                       return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old remote commitment transaction"));
+                       return Err(ChannelError::Close("Peer attempted to reestablish channel with a very old remote commitment transaction".to_owned()));
                }
        }
 
@@ -2739,20 +2880,20 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                if self.feerate_per_kw > proposed_feerate {
                        proposed_feerate = self.feerate_per_kw;
                }
-               let tx_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
-               let proposed_total_fee_satoshis = proposed_feerate * tx_weight / 1000;
+               let tx_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.counterparty_shutdown_scriptpubkey.as_ref().unwrap());
+               let proposed_total_fee_satoshis = proposed_feerate as u64 * tx_weight / 1000;
 
                let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
-               let our_sig = self.local_keys
+               let sig = self.holder_keys
                        .sign_closing_transaction(&closing_tx, &self.secp_ctx)
                        .ok();
-               if our_sig.is_none() { return None; }
+               if sig.is_none() { return None; }
 
-               self.last_sent_closing_fee = Some((proposed_feerate, total_fee_satoshis, our_sig.clone().unwrap()));
+               self.last_sent_closing_fee = Some((proposed_feerate, total_fee_satoshis, sig.clone().unwrap()));
                Some(msgs::ClosingSigned {
                        channel_id: self.channel_id,
                        fee_satoshis: total_fee_satoshis,
-                       signature: our_sig.unwrap(),
+                       signature: sig.unwrap(),
                })
        }
 
@@ -2760,17 +2901,17 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                where F::Target: FeeEstimator
        {
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent shutdown when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent shutdown when we needed a channel_reestablish".to_owned()));
                }
                if self.channel_state < ChannelState::FundingSent as u32 {
                        // Spec says we should fail the connection, not the channel, but that's nonsense, there
                        // are plenty of reasons you may want to fail a channel pre-funding, and spec says you
                        // can do that via error message without getting a connection fail anyway...
-                       return Err(ChannelError::Close("Peer sent shutdown pre-funding generation"));
+                       return Err(ChannelError::Close("Peer sent shutdown pre-funding generation".to_owned()));
                }
                for htlc in self.pending_inbound_htlcs.iter() {
                        if let InboundHTLCState::RemoteAnnounced(_) = htlc.state {
-                               return Err(ChannelError::Close("Got shutdown with remote pending HTLCs"));
+                               return Err(ChannelError::Close("Got shutdown with remote pending HTLCs".to_owned()));
                        }
                }
                assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
@@ -2778,20 +2919,20 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                // BOLT 2 says we must only send a scriptpubkey of certain standard forms, which are up to
                // 34 bytes in length, so don't let the remote peer feed us some super fee-heavy script.
                if self.channel_outbound && msg.scriptpubkey.len() > 34 {
-                       return Err(ChannelError::Close("Got shutdown_scriptpubkey of absurd length from remote peer"));
+                       return Err(ChannelError::Close(format!("Got counterparty shutdown_scriptpubkey ({}) of absurd length from remote peer", msg.scriptpubkey.to_bytes().to_hex())));
                }
 
-               //Check shutdown_scriptpubkey form as BOLT says we must
+               //Check counterparty_shutdown_scriptpubkey form as BOLT says we must
                if !msg.scriptpubkey.is_p2pkh() && !msg.scriptpubkey.is_p2sh() && !msg.scriptpubkey.is_v0_p2wpkh() && !msg.scriptpubkey.is_v0_p2wsh() {
-                       return Err(ChannelError::Close("Got a nonstandard scriptpubkey from remote peer"));
+                       return Err(ChannelError::Close(format!("Got a nonstandard scriptpubkey ({}) from remote peer", msg.scriptpubkey.to_bytes().to_hex())));
                }
 
-               if self.their_shutdown_scriptpubkey.is_some() {
-                       if Some(&msg.scriptpubkey) != self.their_shutdown_scriptpubkey.as_ref() {
-                               return Err(ChannelError::Close("Got shutdown request with a scriptpubkey which did not match their previous scriptpubkey"));
+               if self.counterparty_shutdown_scriptpubkey.is_some() {
+                       if Some(&msg.scriptpubkey) != self.counterparty_shutdown_scriptpubkey.as_ref() {
+                               return Err(ChannelError::Close(format!("Got shutdown request with a scriptpubkey ({}) which did not match their previous scriptpubkey.", msg.scriptpubkey.to_bytes().to_hex())));
                        }
                } else {
-                       self.their_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
+                       self.counterparty_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
                }
 
                // From here on out, we may not fail!
@@ -2817,7 +2958,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                // immediately after the commitment dance, but we can send a Shutdown cause we won't send
                // any further commitment updates after we set LocalShutdownSent.
 
-               let our_shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
+               let shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
                        None
                } else {
                        Some(msgs::Shutdown {
@@ -2829,24 +2970,24 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                self.channel_state |= ChannelState::LocalShutdownSent as u32;
                self.update_time_counter += 1;
 
-               Ok((our_shutdown, self.maybe_propose_first_closing_signed(fee_estimator), dropped_outbound_htlcs))
+               Ok((shutdown, self.maybe_propose_first_closing_signed(fee_estimator), dropped_outbound_htlcs))
        }
 
-       fn build_signed_closing_transaction(&self, tx: &mut Transaction, their_sig: &Signature, our_sig: &Signature) {
+       fn build_signed_closing_transaction(&self, tx: &mut Transaction, counterparty_sig: &Signature, sig: &Signature) {
                if tx.input.len() != 1 { panic!("Tried to sign closing transaction that had input count != 1!"); }
                if tx.input[0].witness.len() != 0 { panic!("Tried to re-sign closing transaction"); }
                if tx.output.len() > 2 { panic!("Tried to sign bogus closing transaction"); }
 
                tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
 
-               let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.funding_key()).serialize();
-               let their_funding_key = self.their_funding_pubkey().serialize();
-               if our_funding_key[..] < their_funding_key[..] {
-                       tx.input[0].witness.push(our_sig.serialize_der().to_vec());
-                       tx.input[0].witness.push(their_sig.serialize_der().to_vec());
+               let funding_key = self.holder_keys.pubkeys().funding_pubkey.serialize();
+               let counterparty_funding_key = self.counterparty_funding_pubkey().serialize();
+               if funding_key[..] < counterparty_funding_key[..] {
+                       tx.input[0].witness.push(sig.serialize_der().to_vec());
+                       tx.input[0].witness.push(counterparty_sig.serialize_der().to_vec());
                } else {
-                       tx.input[0].witness.push(their_sig.serialize_der().to_vec());
-                       tx.input[0].witness.push(our_sig.serialize_der().to_vec());
+                       tx.input[0].witness.push(counterparty_sig.serialize_der().to_vec());
+                       tx.input[0].witness.push(sig.serialize_der().to_vec());
                }
                tx.input[0].witness[1].push(SigHashType::All as u8);
                tx.input[0].witness[2].push(SigHashType::All as u8);
@@ -2858,41 +2999,41 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                where F::Target: FeeEstimator
        {
                if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
-                       return Err(ChannelError::Close("Remote end sent us a closing_signed before both sides provided a shutdown"));
+                       return Err(ChannelError::Close("Remote end sent us a closing_signed before both sides provided a shutdown".to_owned()));
                }
                if self.channel_state & (ChannelState::PeerDisconnected as u32) == ChannelState::PeerDisconnected as u32 {
-                       return Err(ChannelError::Close("Peer sent closing_signed when we needed a channel_reestablish"));
+                       return Err(ChannelError::Close("Peer sent closing_signed when we needed a channel_reestablish".to_owned()));
                }
                if !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() {
-                       return Err(ChannelError::Close("Remote end sent us a closing_signed while there were still pending HTLCs"));
+                       return Err(ChannelError::Close("Remote end sent us a closing_signed while there were still pending HTLCs".to_owned()));
                }
-               if msg.fee_satoshis > 21000000 * 10000000 { //this is required to stop potential overflow in build_closing_transaction
-                       return Err(ChannelError::Close("Remote tried to send us a closing tx with > 21 million BTC fee"));
+               if msg.fee_satoshis > 21_000_000 * 1_0000_0000 { //this is required to stop potential overflow in build_closing_transaction
+                       return Err(ChannelError::Close("Remote tried to send us a closing tx with > 21 million BTC fee".to_owned()));
                }
 
                let funding_redeemscript = self.get_funding_redeemscript();
                let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
                if used_total_fee != msg.fee_satoshis {
-                       return Err(ChannelError::Close("Remote sent us a closing_signed with a fee greater than the value they can claim"));
+                       return Err(ChannelError::Close(format!("Remote sent us a closing_signed with a fee greater than the value they can claim. Fee in message: {}", msg.fee_satoshis)));
                }
-               let mut sighash = hash_to_message!(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]);
+               let mut sighash = hash_to_message!(&bip143::SigHashCache::new(&closing_tx).signature_hash(0, &funding_redeemscript, self.channel_value_satoshis, SigHashType::All)[..]);
 
-               let their_funding_pubkey = &self.their_pubkeys.as_ref().unwrap().funding_pubkey;
+               let counterparty_funding_pubkey = &self.counterparty_pubkeys.as_ref().unwrap().funding_pubkey;
 
-               match self.secp_ctx.verify(&sighash, &msg.signature, their_funding_pubkey) {
+               match self.secp_ctx.verify(&sighash, &msg.signature, counterparty_funding_pubkey) {
                        Ok(_) => {},
                        Err(_e) => {
                                // The remote end may have decided to revoke their output due to inconsistent dust
                                // limits, so check for that case by re-checking the signature here.
                                closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
-                               sighash = hash_to_message!(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]);
-                               secp_check!(self.secp_ctx.verify(&sighash, &msg.signature, self.their_funding_pubkey()), "Invalid closing tx signature from peer");
+                               sighash = hash_to_message!(&bip143::SigHashCache::new(&closing_tx).signature_hash(0, &funding_redeemscript, self.channel_value_satoshis, SigHashType::All)[..]);
+                               secp_check!(self.secp_ctx.verify(&sighash, &msg.signature, self.counterparty_funding_pubkey()), "Invalid closing tx signature from peer".to_owned());
                        },
                };
 
-               if let Some((_, last_fee, our_sig)) = self.last_sent_closing_fee {
+               if let Some((_, last_fee, sig)) = self.last_sent_closing_fee {
                        if last_fee == msg.fee_satoshis {
-                               self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &our_sig);
+                               self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &sig);
                                self.channel_state = ChannelState::ShutdownComplete as u32;
                                self.update_time_counter += 1;
                                return Ok((None, Some(closing_tx)));
@@ -2901,47 +3042,47 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
                macro_rules! propose_new_feerate {
                        ($new_feerate: expr) => {
-                               let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
-                               let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate * closing_tx_max_weight / 1000, false);
-                               let our_sig = self.local_keys
+                               let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.counterparty_shutdown_scriptpubkey.as_ref().unwrap());
+                               let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate as u64 * closing_tx_max_weight / 1000, false);
+                               let sig = self.holder_keys
                                        .sign_closing_transaction(&closing_tx, &self.secp_ctx)
-                                       .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction"))?;
-                               self.last_sent_closing_fee = Some(($new_feerate, used_total_fee, our_sig.clone()));
+                                       .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
+                               self.last_sent_closing_fee = Some(($new_feerate, used_total_fee, sig.clone()));
                                return Ok((Some(msgs::ClosingSigned {
                                        channel_id: self.channel_id,
                                        fee_satoshis: used_total_fee,
-                                       signature: our_sig,
+                                       signature: sig,
                                }), None))
                        }
                }
 
-               let proposed_sat_per_kw = msg.fee_satoshis * 1000 / closing_tx.get_weight() as u64;
+               let proposed_sat_per_kw = msg.fee_satoshis  * 1000 / closing_tx.get_weight() as u64;
                if self.channel_outbound {
-                       let our_max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
-                       if proposed_sat_per_kw > our_max_feerate {
+                       let max_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
+                       if (proposed_sat_per_kw as u32) > max_feerate {
                                if let Some((last_feerate, _, _)) = self.last_sent_closing_fee {
-                                       if our_max_feerate <= last_feerate {
-                                               return Err(ChannelError::Close("Unable to come to consensus about closing feerate, remote wanted something higher than our Normal feerate"));
+                                       if max_feerate <= last_feerate {
+                                               return Err(ChannelError::Close(format!("Unable to come to consensus about closing feerate, remote wanted something higher ({}) than our Normal feerate ({})", last_feerate, max_feerate)));
                                        }
                                }
-                               propose_new_feerate!(our_max_feerate);
+                               propose_new_feerate!(max_feerate);
                        }
                } else {
-                       let our_min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
-                       if proposed_sat_per_kw < our_min_feerate {
+                       let min_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
+                       if (proposed_sat_per_kw as u32) < min_feerate {
                                if let Some((last_feerate, _, _)) = self.last_sent_closing_fee {
-                                       if our_min_feerate >= last_feerate {
-                                               return Err(ChannelError::Close("Unable to come to consensus about closing feerate, remote wanted something lower than our Background feerate"));
+                                       if min_feerate >= last_feerate {
+                                               return Err(ChannelError::Close(format!("Unable to come to consensus about closing feerate, remote wanted something lower ({}) than our Background feerate ({}).", last_feerate, min_feerate)));
                                        }
                                }
-                               propose_new_feerate!(our_min_feerate);
+                               propose_new_feerate!(min_feerate);
                        }
                }
 
-               let our_sig = self.local_keys
+               let sig = self.holder_keys
                        .sign_closing_transaction(&closing_tx, &self.secp_ctx)
-                       .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction"))?;
-               self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &our_sig);
+                       .map_err(|_| ChannelError::Close("External signer refused to sign closing transaction".to_owned()))?;
+               self.build_signed_closing_transaction(&mut closing_tx, &msg.signature, &sig);
 
                self.channel_state = ChannelState::ShutdownComplete as u32;
                self.update_time_counter += 1;
@@ -2949,7 +3090,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                Ok((Some(msgs::ClosingSigned {
                        channel_id: self.channel_id,
                        fee_satoshis: msg.fee_satoshis,
-                       signature: our_sig,
+                       signature: sig,
                }), Some(closing_tx)))
        }
 
@@ -2965,14 +3106,6 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                self.user_id
        }
 
-       /// May only be called after funding has been initiated (ie is_funding_initiated() is true)
-       pub fn channel_monitor(&mut self) -> &mut ChannelMonitor<ChanSigner> {
-               if self.channel_state < ChannelState::FundingSent as u32 {
-                       panic!("Can't get a channel monitor until funding has been created");
-               }
-               self.channel_monitor.as_mut().unwrap()
-       }
-
        /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus,
        /// is_usable() returns true).
        /// Allowed in any state (including after shutdown)
@@ -2987,18 +3120,31 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        }
 
        /// Allowed in any state (including after shutdown)
-       pub fn get_their_node_id(&self) -> PublicKey {
-               self.their_node_id
+       pub fn get_counterparty_node_id(&self) -> PublicKey {
+               self.counterparty_node_id
        }
 
        /// Allowed in any state (including after shutdown)
-       pub fn get_our_htlc_minimum_msat(&self) -> u64 {
-               self.our_htlc_minimum_msat
+       #[cfg(test)]
+       pub fn get_holder_htlc_minimum_msat(&self) -> u64 {
+               self.holder_htlc_minimum_msat
        }
 
        /// Allowed in any state (including after shutdown)
-       pub fn get_their_htlc_minimum_msat(&self) -> u64 {
-               self.our_htlc_minimum_msat
+       pub fn get_announced_htlc_max_msat(&self) -> u64 {
+               return cmp::min(
+                       // Upper bound by capacity. We make it a bit less than full capacity to prevent attempts
+                       // to use full capacity. This is an effort to reduce routing failures, because in many cases
+                       // channel might have been used to route very small values (either by honest users or as DoS).
+                       self.channel_value_satoshis * 9 / 10,
+
+                       Channel::<ChanSigner>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis)
+               );
+       }
+
+       /// Allowed in any state (including after shutdown)
+       pub fn get_counterparty_htlc_minimum_msat(&self) -> u64 {
+               self.counterparty_htlc_minimum_msat
        }
 
        pub fn get_value_satoshis(&self) -> u64 {
@@ -3010,25 +3156,25 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        }
 
        #[cfg(test)]
-       pub fn get_feerate(&self) -> u64 {
+       pub fn get_feerate(&self) -> u32 {
                self.feerate_per_kw
        }
 
-       pub fn get_cur_local_commitment_transaction_number(&self) -> u64 {
-               self.cur_local_commitment_transaction_number + 1
+       pub fn get_cur_holder_commitment_transaction_number(&self) -> u64 {
+               self.cur_holder_commitment_transaction_number + 1
        }
 
-       pub fn get_cur_remote_commitment_transaction_number(&self) -> u64 {
-               self.cur_remote_commitment_transaction_number + 1 - if self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 }
+       pub fn get_cur_counterparty_commitment_transaction_number(&self) -> u64 {
+               self.cur_counterparty_commitment_transaction_number + 1 - if self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32) != 0 { 1 } else { 0 }
        }
 
-       pub fn get_revoked_remote_commitment_transaction_number(&self) -> u64 {
-               self.cur_remote_commitment_transaction_number + 2
+       pub fn get_revoked_counterparty_commitment_transaction_number(&self) -> u64 {
+               self.cur_counterparty_commitment_transaction_number + 2
        }
 
        #[cfg(test)]
-       pub fn get_local_keys(&self) -> &ChanSigner {
-               &self.local_keys
+       pub fn get_keys(&self) -> &ChanSigner {
+               &self.holder_keys
        }
 
        #[cfg(test)]
@@ -3036,7 +3182,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                ChannelValueStat {
                        value_to_self_msat: self.value_to_self_msat,
                        channel_value_msat: self.channel_value_satoshis * 1000,
-                       channel_reserve_msat: self.their_channel_reserve_satoshis * 1000,
+                       channel_reserve_msat: self.counterparty_selected_channel_reserve_satoshis * 1000,
                        pending_outbound_htlcs_amount_msat: self.pending_outbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
                        pending_inbound_htlcs_amount_msat: self.pending_inbound_htlcs.iter().map(|ref h| h.amount_msat).sum::<u64>(),
                        holding_cell_outbound_amount_msat: {
@@ -3051,7 +3197,8 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                }
                                res
                        },
-                       their_max_htlc_value_in_flight_msat: self.their_max_htlc_value_in_flight_msat,
+                       counterparty_max_htlc_value_in_flight_msat: self.counterparty_max_htlc_value_in_flight_msat,
+                       counterparty_dust_limit_msat: self.counterparty_dust_limit_satoshis * 1000,
                }
        }
 
@@ -3074,22 +3221,22 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
        /// Gets the fee we'd want to charge for adding an HTLC output to this Channel
        /// Allowed in any state (including after shutdown)
-       pub fn get_our_fee_base_msat<F: Deref>(&self, fee_estimator: &F) -> u32
+       pub fn get_holder_fee_base_msat<F: Deref>(&self, fee_estimator: &F) -> u32
                where F::Target: FeeEstimator
        {
                // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC
                // output value back into a transaction with the regular channel output:
 
                // the fee cost of the HTLC-Success/HTLC-Timeout transaction:
-               let mut res = self.feerate_per_kw * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
+               let mut res = self.feerate_per_kw as u64 * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT) / 1000;
 
                if self.channel_outbound {
                        // + the marginal fee increase cost to us in the commitment transaction:
-                       res += self.feerate_per_kw * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
+                       res += self.feerate_per_kw as u64 * COMMITMENT_TX_WEIGHT_PER_HTLC / 1000;
                }
 
                // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output:
-               res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
+               res += fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) as u64 * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT / 1000;
 
                res as u32
        }
@@ -3168,7 +3315,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        ///
        /// May return some HTLCs (and their payment_hash) which have timed out and should be failed
        /// back.
-       pub fn block_connected(&mut self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) -> Result<(Option<msgs::FundingLocked>, Vec<(HTLCSource, PaymentHash)>), msgs::ErrorMessage> {
+       pub fn block_connected(&mut self, header: &BlockHeader, txdata: &TransactionData, height: u32) -> Result<(Option<msgs::FundingLocked>, Vec<(HTLCSource, PaymentHash)>), msgs::ErrorMessage> {
                let mut timed_out_htlcs = Vec::new();
                self.holding_cell_htlc_updates.retain(|htlc_update| {
                        match htlc_update {
@@ -3182,13 +3329,13 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        }
                });
                let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
-               if header.bitcoin_hash() != self.last_block_connected {
+               if header.block_hash() != self.last_block_connected {
                        if self.funding_tx_confirmations > 0 {
                                self.funding_tx_confirmations += 1;
                        }
                }
                if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
-                       for (ref tx, index_in_block) in txn_matched.iter().zip(indexes_of_txn_matched) {
+                       for &(index_in_block, tx) in txdata.iter() {
                                if tx.txid() == self.funding_txo.unwrap().txid {
                                        let txo_idx = self.funding_txo.unwrap().index as usize;
                                        if txo_idx >= tx.output.len() || tx.output[txo_idx].script_pubkey != self.get_funding_redeemscript().to_v0_p2wsh() ||
@@ -3219,20 +3366,21 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                                                }
                                                        }
                                                }
+                                               if height > 0xff_ff_ff || (index_in_block) > 0xff_ff_ff {
+                                                       panic!("Block was bogus - either height 16 million or had > 16 million transactions");
+                                               }
+                                               assert!(txo_idx <= 0xffff); // txo_idx is a (u16 as usize), so this is just listed here for completeness
                                                self.funding_tx_confirmations = 1;
-                                               self.short_channel_id = Some(((height as u64)          << (5*8)) |
-                                                                            ((*index_in_block as u64) << (2*8)) |
-                                                                            ((txo_idx as u64)         << (0*8)));
+                                               self.short_channel_id = Some(((height as u64)         << (5*8)) |
+                                                                            ((index_in_block as u64) << (2*8)) |
+                                                                            ((txo_idx as u64)        << (0*8)));
                                        }
                                }
                        }
                }
-               if header.bitcoin_hash() != self.last_block_connected {
-                       self.last_block_connected = header.bitcoin_hash();
+               if header.block_hash() != self.last_block_connected {
+                       self.last_block_connected = header.block_hash();
                        self.update_time_counter = cmp::max(self.update_time_counter, header.time);
-                       if let Some(channel_monitor) = self.channel_monitor.as_mut() {
-                               channel_monitor.last_block_hash = self.last_block_connected;
-                       }
                        if self.funding_tx_confirmations > 0 {
                                if self.funding_tx_confirmations == self.minimum_depth as u64 {
                                        let need_commitment_update = if non_shutdown_state == ChannelState::FundingSent as u32 {
@@ -3253,7 +3401,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                                // funding_tx_confirmed_in and return.
                                                false
                                        };
-                                       self.funding_tx_confirmed_in = Some(header.bitcoin_hash());
+                                       self.funding_tx_confirmed_in = Some(self.last_block_connected);
 
                                        //TODO: Note that this must be a duplicate of the previous commitment point they sent us,
                                        //as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
@@ -3261,8 +3409,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                        //a protocol oversight, but I assume I'm just missing something.
                                        if need_commitment_update {
                                                if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) == 0 {
-                                                       let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
-                                                       let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
+                                                       let next_per_commitment_point = self.holder_keys.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
                                                        return Ok((Some(msgs::FundingLocked {
                                                                channel_id: self.channel_id,
                                                                next_per_commitment_point: next_per_commitment_point,
@@ -3288,22 +3435,17 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                                return true;
                        }
                }
-               if Some(header.bitcoin_hash()) == self.funding_tx_confirmed_in {
+               self.last_block_connected = header.block_hash();
+               if Some(self.last_block_connected) == self.funding_tx_confirmed_in {
                        self.funding_tx_confirmations = self.minimum_depth as u64 - 1;
                }
-               self.last_block_connected = header.bitcoin_hash();
-               if let Some(channel_monitor) = self.channel_monitor.as_mut() {
-                       channel_monitor.last_block_hash = self.last_block_connected;
-               }
                false
        }
 
        // Methods to get unprompted messages to send to the remote end (or where we already returned
        // something in the handler for the message that prompted this message):
 
-       pub fn get_open_channel<F: Deref>(&self, chain_hash: Sha256dHash, fee_estimator: &F) -> msgs::OpenChannel
-               where F::Target: FeeEstimator
-       {
+       pub fn get_open_channel(&self, chain_hash: BlockHash) -> msgs::OpenChannel {
                if !self.channel_outbound {
                        panic!("Tried to open a channel for an inbound channel?");
                }
@@ -3311,30 +3453,31 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        panic!("Cannot generate an open_channel after we've moved forward");
                }
 
-               if self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
+               if self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
                        panic!("Tried to send an open_channel for a channel that has already advanced");
                }
 
-               let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
+               let first_per_commitment_point = self.holder_keys.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
+               let keys = self.holder_keys.pubkeys();
 
                msgs::OpenChannel {
                        chain_hash: chain_hash,
                        temporary_channel_id: self.channel_id,
                        funding_satoshis: self.channel_value_satoshis,
                        push_msat: self.channel_value_satoshis * 1000 - self.value_to_self_msat,
-                       dust_limit_satoshis: self.our_dust_limit_satoshis,
-                       max_htlc_value_in_flight_msat: Channel::<ChanSigner>::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
-                       channel_reserve_satoshis: Channel::<ChanSigner>::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
-                       htlc_minimum_msat: self.our_htlc_minimum_msat,
-                       feerate_per_kw: fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background) as u32,
-                       to_self_delay: self.our_to_self_delay,
+                       dust_limit_satoshis: self.holder_dust_limit_satoshis,
+                       max_htlc_value_in_flight_msat: Channel::<ChanSigner>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
+                       channel_reserve_satoshis: Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis),
+                       htlc_minimum_msat: self.holder_htlc_minimum_msat,
+                       feerate_per_kw: self.feerate_per_kw as u32,
+                       to_self_delay: self.holder_selected_contest_delay,
                        max_accepted_htlcs: OUR_MAX_HTLCS,
-                       funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.funding_key()),
-                       revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.revocation_base_key()),
-                       payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.payment_base_key()),
-                       delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.delayed_payment_base_key()),
-                       htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.htlc_base_key()),
-                       first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret),
+                       funding_pubkey: keys.funding_pubkey,
+                       revocation_basepoint: keys.revocation_basepoint,
+                       payment_point: keys.payment_point,
+                       delayed_payment_basepoint: keys.delayed_payment_basepoint,
+                       htlc_basepoint: keys.htlc_basepoint,
+                       first_per_commitment_point,
                        channel_flags: if self.config.announced_channel {1} else {0},
                        shutdown_scriptpubkey: OptionalField::Present(if self.config.commit_upfront_shutdown_pubkey { self.get_closing_scriptpubkey() } else { Builder::new().into_script() })
                }
@@ -3347,37 +3490,39 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) {
                        panic!("Tried to send accept_channel after channel had moved forward");
                }
-               if self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
+               if self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
                        panic!("Tried to send an accept_channel for a channel that has already advanced");
                }
 
-               let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
+               let first_per_commitment_point = self.holder_keys.get_per_commitment_point(self.cur_holder_commitment_transaction_number, &self.secp_ctx);
+               let keys = self.holder_keys.pubkeys();
 
                msgs::AcceptChannel {
                        temporary_channel_id: self.channel_id,
-                       dust_limit_satoshis: self.our_dust_limit_satoshis,
-                       max_htlc_value_in_flight_msat: Channel::<ChanSigner>::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
-                       channel_reserve_satoshis: Channel::<ChanSigner>::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
-                       htlc_minimum_msat: self.our_htlc_minimum_msat,
+                       dust_limit_satoshis: self.holder_dust_limit_satoshis,
+                       max_htlc_value_in_flight_msat: Channel::<ChanSigner>::get_holder_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
+                       channel_reserve_satoshis: Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis),
+                       htlc_minimum_msat: self.holder_htlc_minimum_msat,
                        minimum_depth: self.minimum_depth,
-                       to_self_delay: self.our_to_self_delay,
+                       to_self_delay: self.holder_selected_contest_delay,
                        max_accepted_htlcs: OUR_MAX_HTLCS,
-                       funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.funding_key()),
-                       revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.revocation_base_key()),
-                       payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.payment_base_key()),
-                       delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.delayed_payment_base_key()),
-                       htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.htlc_base_key()),
-                       first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret),
+                       funding_pubkey: keys.funding_pubkey,
+                       revocation_basepoint: keys.revocation_basepoint,
+                       payment_point: keys.payment_point,
+                       delayed_payment_basepoint: keys.delayed_payment_basepoint,
+                       htlc_basepoint: keys.htlc_basepoint,
+                       first_per_commitment_point,
                        shutdown_scriptpubkey: OptionalField::Present(if self.config.commit_upfront_shutdown_pubkey { self.get_closing_scriptpubkey() } else { Builder::new().into_script() })
                }
        }
 
        /// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
-       fn get_outbound_funding_created_signature(&mut self) -> Result<Signature, ChannelError> {
-               let remote_keys = self.build_remote_transaction_keys()?;
-               let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false, self.feerate_per_kw).0;
-               Ok(self.local_keys.sign_remote_commitment(self.feerate_per_kw, &remote_initial_commitment_tx, &remote_keys, &Vec::new(), self.our_to_self_delay, &self.secp_ctx)
-                               .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed"))?.0)
+       fn get_outbound_funding_created_signature<L: Deref>(&mut self, logger: &L) -> Result<Signature, ChannelError> where L::Target: Logger {
+               let counterparty_keys = self.build_remote_transaction_keys()?;
+               let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, self.feerate_per_kw, logger).0;
+               let pre_remote_keys = PreCalculatedTxCreationKeys::new(counterparty_keys);
+               Ok(self.holder_keys.sign_counterparty_commitment(self.feerate_per_kw, &counterparty_initial_commitment_tx, &pre_remote_keys, &Vec::new(), &self.secp_ctx)
+                               .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0)
        }
 
        /// Updates channel state with knowledge of the funding transaction's txid/index, and generates
@@ -3387,7 +3532,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// Note that channel_id changes during this call!
        /// Do NOT broadcast the funding transaction until after a successful funding_signed call!
        /// If an Err is returned, it is a ChannelError::Close.
-       pub fn get_outbound_funding_created(&mut self, funding_txo: OutPoint) -> Result<msgs::FundingCreated, ChannelError> {
+       pub fn get_outbound_funding_created<L: Deref>(&mut self, funding_txo: OutPoint, logger: &L) -> Result<msgs::FundingCreated, ChannelError> where L::Target: Logger {
                if !self.channel_outbound {
                        panic!("Tried to create outbound funding_created message on an inbound channel!");
                }
@@ -3395,16 +3540,16 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        panic!("Tried to get a funding_created messsage at a time other than immediately after initial handshake completion (or tried to get funding_created twice)");
                }
                if self.commitment_secrets.get_min_seen_secret() != (1 << 48) ||
-                               self.cur_remote_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
-                               self.cur_local_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
+                               self.cur_counterparty_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER ||
+                               self.cur_holder_commitment_transaction_number != INITIAL_COMMITMENT_NUMBER {
                        panic!("Should not have advanced channel commitment tx numbers prior to funding_created");
                }
 
                self.funding_txo = Some(funding_txo.clone());
-               let our_signature = match self.get_outbound_funding_created_signature() {
+               let signature = match self.get_outbound_funding_created_signature(logger) {
                        Ok(res) => res,
                        Err(e) => {
-                               log_error!(self, "Got bad signatures: {:?}!", e);
+                               log_error!(logger, "Got bad signatures: {:?}!", e);
                                self.funding_txo = None;
                                return Err(e);
                        }
@@ -3421,7 +3566,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        temporary_channel_id,
                        funding_txid: funding_txo.txid,
                        funding_output_index: funding_txo.index,
-                       signature: our_signature
+                       signature: signature
                })
        }
 
@@ -3433,54 +3578,61 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// closing).
        /// Note that the "channel must be funded" requirement is stricter than BOLT 7 requires - see
        /// https://github.com/lightningnetwork/lightning-rfc/issues/468
-       pub fn get_channel_announcement(&self, our_node_id: PublicKey, chain_hash: Sha256dHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), ChannelError> {
+       pub fn get_channel_announcement(&self, node_id: PublicKey, chain_hash: BlockHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), ChannelError> {
                if !self.config.announced_channel {
-                       return Err(ChannelError::Ignore("Channel is not available for public announcements"));
+                       return Err(ChannelError::Ignore("Channel is not available for public announcements".to_owned()));
                }
                if self.channel_state & (ChannelState::ChannelFunded as u32) == 0 {
-                       return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement until the channel funding has been locked"));
+                       return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement until the channel funding has been locked".to_owned()));
                }
                if (self.channel_state & (ChannelState::LocalShutdownSent as u32 | ChannelState::ShutdownComplete as u32)) != 0 {
-                       return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement once the channel is closing"));
+                       return Err(ChannelError::Ignore("Cannot get a ChannelAnnouncement once the channel is closing".to_owned()));
                }
 
-               let were_node_one = our_node_id.serialize()[..] < self.their_node_id.serialize()[..];
-               let our_bitcoin_key = PublicKey::from_secret_key(&self.secp_ctx, self.local_keys.funding_key());
+               let were_node_one = node_id.serialize()[..] < self.counterparty_node_id.serialize()[..];
 
                let msg = msgs::UnsignedChannelAnnouncement {
-                       features: ChannelFeatures::supported(),
+                       features: ChannelFeatures::known(),
                        chain_hash: chain_hash,
                        short_channel_id: self.get_short_channel_id().unwrap(),
-                       node_id_1: if were_node_one { our_node_id } else { self.get_their_node_id() },
-                       node_id_2: if were_node_one { self.get_their_node_id() } else { our_node_id },
-                       bitcoin_key_1: if were_node_one { our_bitcoin_key } else { self.their_funding_pubkey().clone() },
-                       bitcoin_key_2: if were_node_one { self.their_funding_pubkey().clone() } else { our_bitcoin_key },
+                       node_id_1: if were_node_one { node_id } else { self.get_counterparty_node_id() },
+                       node_id_2: if were_node_one { self.get_counterparty_node_id() } else { node_id },
+                       bitcoin_key_1: if were_node_one { self.holder_keys.pubkeys().funding_pubkey } else { self.counterparty_funding_pubkey().clone() },
+                       bitcoin_key_2: if were_node_one { self.counterparty_funding_pubkey().clone() } else { self.holder_keys.pubkeys().funding_pubkey },
                        excess_data: Vec::new(),
                };
 
-               let sig = self.local_keys.sign_channel_announcement(&msg, &self.secp_ctx)
-                       .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement"))?;
+               let sig = self.holder_keys.sign_channel_announcement(&msg, &self.secp_ctx)
+                       .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
 
                Ok((msg, sig))
        }
 
        /// May panic if called on a channel that wasn't immediately-previously
        /// self.remove_uncommitted_htlcs_and_mark_paused()'d
-       pub fn get_channel_reestablish(&self) -> msgs::ChannelReestablish {
+       pub fn get_channel_reestablish<L: Deref>(&self, logger: &L) -> msgs::ChannelReestablish where L::Target: Logger {
                assert_eq!(self.channel_state & ChannelState::PeerDisconnected as u32, ChannelState::PeerDisconnected as u32);
-               assert_ne!(self.cur_remote_commitment_transaction_number, INITIAL_COMMITMENT_NUMBER);
-               let data_loss_protect = if self.cur_remote_commitment_transaction_number + 1 < INITIAL_COMMITMENT_NUMBER {
-                       let remote_last_secret = self.commitment_secrets.get_secret(self.cur_remote_commitment_transaction_number + 2).unwrap();
-                       log_trace!(self, "Enough info to generate a Data Loss Protect with per_commitment_secret {}", log_bytes!(remote_last_secret));
+               assert_ne!(self.cur_counterparty_commitment_transaction_number, INITIAL_COMMITMENT_NUMBER);
+               // Prior to static_remotekey, my_current_per_commitment_point was critical to claiming
+               // current to_remote balances. However, it no longer has any use, and thus is now simply
+               // set to a dummy (but valid, as required by the spec) public key.
+               // fuzztarget mode marks a subset of pubkeys as invalid so that we can hit "invalid pubkey"
+               // branches, but we unwrap it below, so we arbitrarily select a dummy pubkey which is both
+               // valid, and valid in fuzztarget mode's arbitrary validity criteria:
+               let mut pk = [2; 33]; pk[1] = 0xff;
+               let dummy_pubkey = PublicKey::from_slice(&pk).unwrap();
+               let data_loss_protect = if self.cur_counterparty_commitment_transaction_number + 1 < INITIAL_COMMITMENT_NUMBER {
+                       let remote_last_secret = self.commitment_secrets.get_secret(self.cur_counterparty_commitment_transaction_number + 2).unwrap();
+                       log_trace!(logger, "Enough info to generate a Data Loss Protect with per_commitment_secret {}", log_bytes!(remote_last_secret));
                        OptionalField::Present(DataLossProtect {
                                your_last_per_commitment_secret: remote_last_secret,
-                               my_current_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number + 1))
+                               my_current_per_commitment_point: dummy_pubkey
                        })
                } else {
-                       log_info!(self, "Sending a data_loss_protect with no previous remote per_commitment_secret");
+                       log_info!(logger, "Sending a data_loss_protect with no previous remote per_commitment_secret");
                        OptionalField::Present(DataLossProtect {
                                your_last_per_commitment_secret: [0;32],
-                               my_current_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number + 1))
+                               my_current_per_commitment_point: dummy_pubkey,
                        })
                };
                msgs::ChannelReestablish {
@@ -3494,15 +3646,15 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
                        // next_local_commitment_number is the next commitment_signed number we expect to
                        // receive (indicating if they need to resend one that we missed).
-                       next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number,
+                       next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_holder_commitment_transaction_number,
                        // We have to set next_remote_commitment_number to the next revoke_and_ack we expect to
                        // receive, however we track it by the next commitment number for a remote transaction
                        // (which is one further, as they always revoke previous commitment transaction, not
                        // the one we send) so we have to decrement by 1. Note that if
-                       // cur_remote_commitment_transaction_number is INITIAL_COMMITMENT_NUMBER we will have
+                       // cur_counterparty_commitment_transaction_number is INITIAL_COMMITMENT_NUMBER we will have
                        // dropped this channel on disconnect as it hasn't yet reached FundingSent so we can't
                        // overflow here.
-                       next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_remote_commitment_transaction_number - 1,
+                       next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_counterparty_commitment_transaction_number - 1,
                        data_loss_protect,
                }
        }
@@ -3519,19 +3671,19 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// If an Err is returned, it's a ChannelError::Ignore!
        pub fn send_htlc(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket) -> Result<Option<msgs::UpdateAddHTLC>, ChannelError> {
                if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
-                       return Err(ChannelError::Ignore("Cannot send HTLC until channel is fully established and we haven't started shutting down"));
+                       return Err(ChannelError::Ignore("Cannot send HTLC until channel is fully established and we haven't started shutting down".to_owned()));
                }
-
-               if amount_msat > self.channel_value_satoshis * 1000 {
-                       return Err(ChannelError::Ignore("Cannot send more than the total value of the channel"));
+               let channel_total_msat = self.channel_value_satoshis * 1000;
+               if amount_msat > channel_total_msat {
+                       return Err(ChannelError::Ignore(format!("Cannot send amount {}, because it is more than the total value of the channel {}", amount_msat, channel_total_msat)));
                }
 
                if amount_msat == 0 {
-                       return Err(ChannelError::Ignore("Cannot send 0-msat HTLC"));
+                       return Err(ChannelError::Ignore("Cannot send 0-msat HTLC".to_owned()));
                }
 
-               if amount_msat < self.their_htlc_minimum_msat {
-                       return Err(ChannelError::Ignore("Cannot send less than their minimum HTLC value"));
+               if amount_msat < self.counterparty_htlc_minimum_msat {
+                       return Err(ChannelError::Ignore(format!("Cannot send less than their minimum HTLC value ({})", self.counterparty_htlc_minimum_msat)));
                }
 
                if (self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32)) != 0 {
@@ -3541,56 +3693,81 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        // disconnected during the time the previous hop was doing the commitment dance we may
                        // end up getting here after the forwarding delay. In any case, returning an
                        // IgnoreError will get ChannelManager to do the right thing and fail backwards now.
-                       return Err(ChannelError::Ignore("Cannot send an HTLC while disconnected/frozen for channel monitor update"));
+                       return Err(ChannelError::Ignore("Cannot send an HTLC while disconnected/frozen for channel monitor update".to_owned()));
                }
 
                let (outbound_htlc_count, htlc_outbound_value_msat) = self.get_outbound_pending_htlc_stats();
-               if outbound_htlc_count + 1 > self.their_max_accepted_htlcs as u32 {
-                       return Err(ChannelError::Ignore("Cannot push more than their max accepted HTLCs"));
+               if outbound_htlc_count + 1 > self.counterparty_max_accepted_htlcs as u32 {
+                       return Err(ChannelError::Ignore(format!("Cannot push more than their max accepted HTLCs ({})", self.counterparty_max_accepted_htlcs)));
                }
                // Check their_max_htlc_value_in_flight_msat
-               if htlc_outbound_value_msat + amount_msat > self.their_max_htlc_value_in_flight_msat {
-                       return Err(ChannelError::Ignore("Cannot send value that would put us over the max HTLC value in flight our peer will accept"));
+               if htlc_outbound_value_msat + amount_msat > self.counterparty_max_htlc_value_in_flight_msat {
+                       return Err(ChannelError::Ignore(format!("Cannot send value that would put us over the max HTLC value in flight our peer will accept ({})", self.counterparty_max_htlc_value_in_flight_msat)));
+               }
+
+               if !self.channel_outbound {
+                       // Check that we won't violate the remote channel reserve by adding this HTLC.
+
+                       let counterparty_balance_msat = self.channel_value_satoshis * 1000 - self.value_to_self_msat;
+                       let holder_selected_chan_reserve_msat = Channel::<ChanSigner>::get_holder_selected_channel_reserve_satoshis(self.channel_value_satoshis);
+                       // 1 additional HTLC corresponding to this HTLC.
+                       let counterparty_commit_tx_fee_msat = self.next_remote_commit_tx_fee_msat(1);
+                       if counterparty_balance_msat < holder_selected_chan_reserve_msat + counterparty_commit_tx_fee_msat {
+                               return Err(ChannelError::Ignore("Cannot send value that would put counterparty balance under holder-announced channel reserve value".to_owned()));
+                       }
+               }
+
+               let pending_value_to_self_msat = self.value_to_self_msat - htlc_outbound_value_msat;
+               if pending_value_to_self_msat < amount_msat {
+                       return Err(ChannelError::Ignore(format!("Cannot send value that would overdraw remaining funds. Amount: {}, pending value to self {}", amount_msat, pending_value_to_self_msat)));
                }
 
-               // Check self.their_channel_reserve_satoshis (the amount we must keep as
-               // reserve for them to have something to claim if we misbehave)
-               if self.value_to_self_msat < self.their_channel_reserve_satoshis * 1000 + amount_msat + htlc_outbound_value_msat {
-                       return Err(ChannelError::Ignore("Cannot send value that would put us over their reserve value"));
+               // The `+1` is for the HTLC currently being added to the commitment tx and
+               // the `2 *` and `+1` are for the fee spike buffer.
+               let commit_tx_fee_msat = if self.channel_outbound {
+                       2 * self.next_local_commit_tx_fee_msat(1 + 1)
+               } else { 0 };
+               if pending_value_to_self_msat - amount_msat < commit_tx_fee_msat {
+                       return Err(ChannelError::Ignore(format!("Cannot send value that would not leave enough to pay for fees. Pending value to self: {}. local_commit_tx_fee {}", pending_value_to_self_msat, commit_tx_fee_msat)));
                }
 
-               //TODO: Check cltv_expiry? Do this in channel manager?
+               // Check self.counterparty_selected_channel_reserve_satoshis (the amount we must keep as
+               // reserve for the remote to have something to claim if we misbehave)
+               let chan_reserve_msat = self.counterparty_selected_channel_reserve_satoshis * 1000;
+               if pending_value_to_self_msat - amount_msat - commit_tx_fee_msat < chan_reserve_msat {
+                       return Err(ChannelError::Ignore(format!("Cannot send value that would put our balance under counterparty-announced channel reserve value ({})", chan_reserve_msat)));
+               }
 
                // Now update local state:
                if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
                        self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
-                               amount_msat: amount_msat,
-                               payment_hash: payment_hash,
-                               cltv_expiry: cltv_expiry,
+                               amount_msat,
+                               payment_hash,
+                               cltv_expiry,
                                source,
-                               onion_routing_packet: onion_routing_packet,
+                               onion_routing_packet,
                        });
                        return Ok(None);
                }
 
                self.pending_outbound_htlcs.push(OutboundHTLCOutput {
-                       htlc_id: self.next_local_htlc_id,
-                       amount_msat: amount_msat,
+                       htlc_id: self.next_holder_htlc_id,
+                       amount_msat,
                        payment_hash: payment_hash.clone(),
-                       cltv_expiry: cltv_expiry,
+                       cltv_expiry,
                        state: OutboundHTLCState::LocalAnnounced(Box::new(onion_routing_packet.clone())),
                        source,
                });
 
                let res = msgs::UpdateAddHTLC {
                        channel_id: self.channel_id,
-                       htlc_id: self.next_local_htlc_id,
-                       amount_msat: amount_msat,
-                       payment_hash: payment_hash,
-                       cltv_expiry: cltv_expiry,
-                       onion_routing_packet: onion_routing_packet,
+                       htlc_id: self.next_holder_htlc_id,
+                       amount_msat,
+                       payment_hash,
+                       cltv_expiry,
+                       onion_routing_packet,
                };
-               self.next_local_htlc_id += 1;
+               self.next_holder_htlc_id += 1;
 
                Ok(Some(res))
        }
@@ -3599,7 +3776,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        /// Always returns a ChannelError::Close if an immediately-preceding (read: the
        /// last call to this Channel) send_htlc returned Ok(Some(_)) and there is an Err.
        /// May panic if called except immediately after a successful, Ok(Some(_))-returning send_htlc.
-       pub fn send_commitment(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> {
+       pub fn send_commitment<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
                if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
                        panic!("Cannot create commitment tx until channel is fully established");
                }
@@ -3628,10 +3805,10 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                if !have_updates {
                        panic!("Cannot create commitment tx until we have some updates to send");
                }
-               self.send_commitment_no_status_check()
+               self.send_commitment_no_status_check(logger)
        }
        /// Only fails in case of bad keys
-       fn send_commitment_no_status_check(&mut self) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> {
+       fn send_commitment_no_status_check<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
                // We can upgrade the status of some HTLCs that are waiting on a commitment, even if we
                // fail to generate this, we still are at least at a position where upgrading their status
                // is acceptable.
@@ -3652,12 +3829,12 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                }
                self.resend_order = RAACommitmentOrder::RevokeAndACKFirst;
 
-               let (res, remote_commitment_tx, htlcs) = match self.send_commitment_no_state_update() {
-                       Ok((res, (remote_commitment_tx, mut htlcs))) => {
+               let (res, counterparty_commitment_tx, htlcs) = match self.send_commitment_no_state_update(logger) {
+                       Ok((res, (counterparty_commitment_tx, mut htlcs))) => {
                                // Update state now that we've passed all the can-fail calls...
                                let htlcs_no_ref: Vec<(HTLCOutputInCommitment, Option<Box<HTLCSource>>)> =
                                        htlcs.drain(..).map(|(htlc, htlc_source)| (htlc, htlc_source.map(|source_ref| Box::new(source_ref.clone())))).collect();
-                               (res, remote_commitment_tx, htlcs_no_ref)
+                               (res, counterparty_commitment_tx, htlcs_no_ref)
                        },
                        Err(e) => return Err(e),
                };
@@ -3665,21 +3842,20 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                self.latest_monitor_update_id += 1;
                let monitor_update = ChannelMonitorUpdate {
                        update_id: self.latest_monitor_update_id,
-                       updates: vec![ChannelMonitorUpdateStep::LatestRemoteCommitmentTXInfo {
-                               unsigned_commitment_tx: remote_commitment_tx.clone(),
+                       updates: vec![ChannelMonitorUpdateStep::LatestCounterpartyCommitmentTXInfo {
+                               unsigned_commitment_tx: counterparty_commitment_tx.clone(),
                                htlc_outputs: htlcs.clone(),
-                               commitment_number: self.cur_remote_commitment_transaction_number,
-                               their_revocation_point: self.their_cur_commitment_point.unwrap()
+                               commitment_number: self.cur_counterparty_commitment_transaction_number,
+                               their_revocation_point: self.counterparty_cur_commitment_point.unwrap()
                        }]
                };
-               self.channel_monitor.as_mut().unwrap().update_monitor_ooo(monitor_update.clone()).unwrap();
                self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32;
                Ok((res, monitor_update))
        }
 
        /// Only fails in case of bad keys. Used for channel_reestablish commitment_signed generation
        /// when we shouldn't change HTLC/channel state.
-       fn send_commitment_no_state_update(&self) -> Result<(msgs::CommitmentSigned, (Transaction, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>)), ChannelError> {
+       fn send_commitment_no_state_update<L: Deref>(&self, logger: &L) -> Result<(msgs::CommitmentSigned, (Transaction, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>)), ChannelError> where L::Target: Logger {
                let mut feerate_per_kw = self.feerate_per_kw;
                if let Some(feerate) = self.pending_update_fee {
                        if self.channel_outbound {
@@ -3687,31 +3863,33 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        }
                }
 
-               let remote_keys = self.build_remote_transaction_keys()?;
-               let remote_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, true, feerate_per_kw);
+               let counterparty_keys = self.build_remote_transaction_keys()?;
+               let counterparty_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, true, feerate_per_kw, logger);
                let (signature, htlc_signatures);
 
                {
-                       let mut htlcs = Vec::with_capacity(remote_commitment_tx.2.len());
-                       for &(ref htlc, _) in remote_commitment_tx.2.iter() {
+                       let mut htlcs = Vec::with_capacity(counterparty_commitment_tx.2.len());
+                       for &(ref htlc, _) in counterparty_commitment_tx.2.iter() {
                                htlcs.push(htlc);
                        }
 
-                       let res = self.local_keys.sign_remote_commitment(feerate_per_kw, &remote_commitment_tx.0, &remote_keys, &htlcs, self.our_to_self_delay, &self.secp_ctx)
-                               .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed"))?;
+                       let pre_remote_keys = PreCalculatedTxCreationKeys::new(counterparty_keys);
+                       let res = self.holder_keys.sign_counterparty_commitment(feerate_per_kw, &counterparty_commitment_tx.0, &pre_remote_keys, &htlcs, &self.secp_ctx)
+                               .map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?;
                        signature = res.0;
                        htlc_signatures = res.1;
+                       let counterparty_keys = pre_remote_keys.trust_key_derivation();
 
-                       log_trace!(self, "Signed remote commitment tx {} with redeemscript {} -> {}",
-                               encode::serialize_hex(&remote_commitment_tx.0),
+                       log_trace!(logger, "Signed remote commitment tx {} with redeemscript {} -> {}",
+                               encode::serialize_hex(&counterparty_commitment_tx.0),
                                encode::serialize_hex(&self.get_funding_redeemscript()),
                                log_bytes!(signature.serialize_compact()[..]));
 
                        for (ref htlc_sig, ref htlc) in htlc_signatures.iter().zip(htlcs) {
-                               log_trace!(self, "Signed remote HTLC tx {} with redeemscript {} with pubkey {} -> {}",
-                                       encode::serialize_hex(&chan_utils::build_htlc_transaction(&remote_commitment_tx.0.txid(), feerate_per_kw, self.our_to_self_delay, htlc, &remote_keys.a_delayed_payment_key, &remote_keys.revocation_key)),
-                                       encode::serialize_hex(&chan_utils::get_htlc_redeemscript(&htlc, &remote_keys)),
-                                       log_bytes!(remote_keys.a_htlc_key.serialize()),
+                               log_trace!(logger, "Signed remote HTLC tx {} with redeemscript {} with pubkey {} -> {}",
+                                       encode::serialize_hex(&chan_utils::build_htlc_transaction(&counterparty_commitment_tx.0.txid(), feerate_per_kw, self.holder_selected_contest_delay, htlc, &counterparty_keys.broadcaster_delayed_payment_key, &counterparty_keys.revocation_key)),
+                                       encode::serialize_hex(&chan_utils::get_htlc_redeemscript(&htlc, counterparty_keys)),
+                                       log_bytes!(counterparty_keys.broadcaster_htlc_key.serialize()),
                                        log_bytes!(htlc_sig.serialize_compact()[..]));
                        }
                }
@@ -3720,17 +3898,17 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
                        channel_id: self.channel_id,
                        signature,
                        htlc_signatures,
-               }, (remote_commitment_tx.0, remote_commitment_tx.2)))
+               }, (counterparty_commitment_tx.0, counterparty_commitment_tx.2)))
        }
 
        /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
        /// to send to the remote peer in one go.
        /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
        /// more info.
-       pub fn send_htlc_and_commit(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket) -> Result<Option<(msgs::UpdateAddHTLC, msgs::CommitmentSigned, ChannelMonitorUpdate)>, ChannelError> {
+       pub fn send_htlc_and_commit<L: Deref>(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket, logger: &L) -> Result<Option<(msgs::UpdateAddHTLC, msgs::CommitmentSigned, ChannelMonitorUpdate)>, ChannelError> where L::Target: Logger {
                match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet)? {
                        Some(update_add_htlc) => {
-                               let (commitment_signed, monitor_update) = self.send_commitment_no_status_check()?;
+                               let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
                                Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
                        },
                        None => Ok(None)
@@ -3742,23 +3920,23 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
        pub fn get_shutdown(&mut self) -> Result<(msgs::Shutdown, Vec<(HTLCSource, PaymentHash)>), APIError> {
                for htlc in self.pending_outbound_htlcs.iter() {
                        if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
-                               return Err(APIError::APIMisuseError{err: "Cannot begin shutdown with pending HTLCs. Process pending events first"});
+                               return Err(APIError::APIMisuseError{err: "Cannot begin shutdown with pending HTLCs. Process pending events first".to_owned()});
                        }
                }
                if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != 0 {
                        if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
-                               return Err(APIError::APIMisuseError{err: "Shutdown already in progress"});
+                               return Err(APIError::APIMisuseError{err: "Shutdown already in progress".to_owned()});
                        }
                        else if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
-                               return Err(APIError::ChannelUnavailable{err: "Shutdown already in progress by remote"});
+                               return Err(APIError::ChannelUnavailable{err: "Shutdown already in progress by remote".to_owned()});
                        }
                }
                assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
                if self.channel_state & (ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateFailed as u32) != 0 {
-                       return Err(APIError::ChannelUnavailable{err: "Cannot begin shutdown while peer is disconnected or we're waiting on a monitor update, maybe force-close instead?"});
+                       return Err(APIError::ChannelUnavailable{err: "Cannot begin shutdown while peer is disconnected or we're waiting on a monitor update, maybe force-close instead?".to_owned()});
                }
 
-               let our_closing_script = self.get_closing_scriptpubkey();
+               let closing_script = self.get_closing_scriptpubkey();
 
                // From here on out, we may not fail!
                if self.channel_state < ChannelState::FundingSent as u32 {
@@ -3784,7 +3962,7 @@ impl<ChanSigner: ChannelKeys> Channel<ChanSigner> {
 
                Ok((msgs::Shutdown {
                        channel_id: self.channel_id,
-                       scriptpubkey: our_closing_script,
+                       scriptpubkey: closing_script,
                }, dropped_outbound_htlcs))
        }
 
@@ -3877,12 +4055,12 @@ impl<ChanSigner: ChannelKeys + Writeable> Writeable for Channel<ChanSigner> {
 
                self.latest_monitor_update_id.write(writer)?;
 
-               self.local_keys.write(writer)?;
+               self.holder_keys.write(writer)?;
                self.shutdown_pubkey.write(writer)?;
                self.destination_script.write(writer)?;
 
-               self.cur_local_commitment_transaction_number.write(writer)?;
-               self.cur_remote_commitment_transaction_number.write(writer)?;
+               self.cur_holder_commitment_transaction_number.write(writer)?;
+               self.cur_counterparty_commitment_transaction_number.write(writer)?;
                self.value_to_self_msat.write(writer)?;
 
                let mut dropped_inbound_htlcs = 0;
@@ -3999,8 +4177,8 @@ impl<ChanSigner: ChannelKeys + Writeable> Writeable for Channel<ChanSigner> {
                self.pending_update_fee.write(writer)?;
                self.holding_cell_update_fee.write(writer)?;
 
-               self.next_local_htlc_id.write(writer)?;
-               (self.next_remote_htlc_id - dropped_inbound_htlcs).write(writer)?;
+               self.next_holder_htlc_id.write(writer)?;
+               (self.next_counterparty_htlc_id - dropped_inbound_htlcs).write(writer)?;
                self.update_time_counter.write(writer)?;
                self.feerate_per_kw.write(writer)?;
 
@@ -4021,34 +4199,32 @@ impl<ChanSigner: ChannelKeys + Writeable> Writeable for Channel<ChanSigner> {
                self.last_block_connected.write(writer)?;
                self.funding_tx_confirmations.write(writer)?;
 
-               self.their_dust_limit_satoshis.write(writer)?;
-               self.our_dust_limit_satoshis.write(writer)?;
-               self.their_max_htlc_value_in_flight_msat.write(writer)?;
-               self.their_channel_reserve_satoshis.write(writer)?;
-               self.their_htlc_minimum_msat.write(writer)?;
-               self.our_htlc_minimum_msat.write(writer)?;
-               self.their_to_self_delay.write(writer)?;
-               self.our_to_self_delay.write(writer)?;
-               self.their_max_accepted_htlcs.write(writer)?;
+               self.counterparty_dust_limit_satoshis.write(writer)?;
+               self.holder_dust_limit_satoshis.write(writer)?;
+               self.counterparty_max_htlc_value_in_flight_msat.write(writer)?;
+               self.counterparty_selected_channel_reserve_satoshis.write(writer)?;
+               self.counterparty_htlc_minimum_msat.write(writer)?;
+               self.holder_htlc_minimum_msat.write(writer)?;
+               self.counterparty_selected_contest_delay.write(writer)?;
+               self.holder_selected_contest_delay.write(writer)?;
+               self.counterparty_max_accepted_htlcs.write(writer)?;
                self.minimum_depth.write(writer)?;
 
-               self.their_pubkeys.write(writer)?;
-               self.their_cur_commitment_point.write(writer)?;
+               self.counterparty_pubkeys.write(writer)?;
+               self.counterparty_cur_commitment_point.write(writer)?;
 
-               self.their_prev_commitment_point.write(writer)?;
-               self.their_node_id.write(writer)?;
+               self.counterparty_prev_commitment_point.write(writer)?;
+               self.counterparty_node_id.write(writer)?;
 
-               self.their_shutdown_scriptpubkey.write(writer)?;
+               self.counterparty_shutdown_scriptpubkey.write(writer)?;
 
                self.commitment_secrets.write(writer)?;
-
-               self.channel_monitor.as_ref().unwrap().write_for_disk(writer)?;
                Ok(())
        }
 }
 
-impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for Channel<ChanSigner> {
-       fn read<R : ::std::io::Read>(reader: &mut R, logger: Arc<Logger>) -> Result<Self, DecodeError> {
+impl<ChanSigner: ChannelKeys + Readable> Readable for Channel<ChanSigner> {
+       fn read<R : ::std::io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
                let _ver: u8 = Readable::read(reader)?;
                let min_ver: u8 = Readable::read(reader)?;
                if min_ver > SERIALIZATION_VERSION {
@@ -4065,12 +4241,12 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for Channel<C
 
                let latest_monitor_update_id = Readable::read(reader)?;
 
-               let local_keys = Readable::read(reader)?;
+               let holder_keys = Readable::read(reader)?;
                let shutdown_pubkey = Readable::read(reader)?;
                let destination_script = Readable::read(reader)?;
 
-               let cur_local_commitment_transaction_number = Readable::read(reader)?;
-               let cur_remote_commitment_transaction_number = Readable::read(reader)?;
+               let cur_holder_commitment_transaction_number = Readable::read(reader)?;
+               let cur_counterparty_commitment_transaction_number = Readable::read(reader)?;
                let value_to_self_msat = Readable::read(reader)?;
 
                let pending_inbound_htlc_count: u64 = Readable::read(reader)?;
@@ -4159,8 +4335,8 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for Channel<C
                let pending_update_fee = Readable::read(reader)?;
                let holding_cell_update_fee = Readable::read(reader)?;
 
-               let next_local_htlc_id = Readable::read(reader)?;
-               let next_remote_htlc_id = Readable::read(reader)?;
+               let next_holder_htlc_id = Readable::read(reader)?;
+               let next_counterparty_htlc_id = Readable::read(reader)?;
                let update_time_counter = Readable::read(reader)?;
                let feerate_per_kw = Readable::read(reader)?;
 
@@ -4177,33 +4353,26 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for Channel<C
                let last_block_connected = Readable::read(reader)?;
                let funding_tx_confirmations = Readable::read(reader)?;
 
-               let their_dust_limit_satoshis = Readable::read(reader)?;
-               let our_dust_limit_satoshis = Readable::read(reader)?;
-               let their_max_htlc_value_in_flight_msat = Readable::read(reader)?;
-               let their_channel_reserve_satoshis = Readable::read(reader)?;
-               let their_htlc_minimum_msat = Readable::read(reader)?;
-               let our_htlc_minimum_msat = Readable::read(reader)?;
-               let their_to_self_delay = Readable::read(reader)?;
-               let our_to_self_delay = Readable::read(reader)?;
-               let their_max_accepted_htlcs = Readable::read(reader)?;
+               let counterparty_dust_limit_satoshis = Readable::read(reader)?;
+               let holder_dust_limit_satoshis = Readable::read(reader)?;
+               let counterparty_max_htlc_value_in_flight_msat = Readable::read(reader)?;
+               let counterparty_selected_channel_reserve_satoshis = Readable::read(reader)?;
+               let counterparty_htlc_minimum_msat = Readable::read(reader)?;
+               let holder_htlc_minimum_msat = Readable::read(reader)?;
+               let counterparty_selected_contest_delay = Readable::read(reader)?;
+               let holder_selected_contest_delay = Readable::read(reader)?;
+               let counterparty_max_accepted_htlcs = Readable::read(reader)?;
                let minimum_depth = Readable::read(reader)?;
 
-               let their_pubkeys = Readable::read(reader)?;
-               let their_cur_commitment_point = Readable::read(reader)?;
+               let counterparty_pubkeys = Readable::read(reader)?;
+               let counterparty_cur_commitment_point = Readable::read(reader)?;
 
-               let their_prev_commitment_point = Readable::read(reader)?;
-               let their_node_id = Readable::read(reader)?;
+               let counterparty_prev_commitment_point = Readable::read(reader)?;
+               let counterparty_node_id = Readable::read(reader)?;
 
-               let their_shutdown_scriptpubkey = Readable::read(reader)?;
+               let counterparty_shutdown_scriptpubkey = Readable::read(reader)?;
                let commitment_secrets = Readable::read(reader)?;
 
-               let (monitor_last_block, channel_monitor) = ReadableArgs::read(reader, logger.clone())?;
-               // We drop the ChannelMonitor's last block connected hash cause we don't actually bother
-               // doing full block connection operations on the internal ChannelMonitor copies
-               if monitor_last_block != last_block_connected {
-                       return Err(DecodeError::InvalidValue);
-               }
-
                Ok(Channel {
                        user_id,
 
@@ -4216,12 +4385,12 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for Channel<C
 
                        latest_monitor_update_id,
 
-                       local_keys,
+                       holder_keys,
                        shutdown_pubkey,
                        destination_script,
 
-                       cur_local_commitment_transaction_number,
-                       cur_remote_commitment_transaction_number,
+                       cur_holder_commitment_transaction_number,
+                       cur_counterparty_commitment_transaction_number,
                        value_to_self_msat,
 
                        pending_inbound_htlcs,
@@ -4238,15 +4407,15 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for Channel<C
 
                        pending_update_fee,
                        holding_cell_update_fee,
-                       next_local_htlc_id,
-                       next_remote_htlc_id,
+                       next_holder_htlc_id,
+                       next_counterparty_htlc_id,
                        update_time_counter,
                        feerate_per_kw,
 
                        #[cfg(debug_assertions)]
-                       max_commitment_tx_output_local: ::std::sync::Mutex::new((0, 0)),
+                       holder_max_commitment_tx_output: ::std::sync::Mutex::new((0, 0)),
                        #[cfg(debug_assertions)]
-                       max_commitment_tx_output_remote: ::std::sync::Mutex::new((0, 0)),
+                       counterparty_max_commitment_tx_output: ::std::sync::Mutex::new((0, 0)),
 
                        last_sent_closing_fee,
 
@@ -4256,46 +4425,42 @@ impl<ChanSigner: ChannelKeys + Readable> ReadableArgs<Arc<Logger>> for Channel<C
                        last_block_connected,
                        funding_tx_confirmations,
 
-                       their_dust_limit_satoshis,
-                       our_dust_limit_satoshis,
-                       their_max_htlc_value_in_flight_msat,
-                       their_channel_reserve_satoshis,
-                       their_htlc_minimum_msat,
-                       our_htlc_minimum_msat,
-                       their_to_self_delay,
-                       our_to_self_delay,
-                       their_max_accepted_htlcs,
+                       counterparty_dust_limit_satoshis,
+                       holder_dust_limit_satoshis,
+                       counterparty_max_htlc_value_in_flight_msat,
+                       counterparty_selected_channel_reserve_satoshis,
+                       counterparty_htlc_minimum_msat,
+                       holder_htlc_minimum_msat,
+                       counterparty_selected_contest_delay,
+                       holder_selected_contest_delay,
+                       counterparty_max_accepted_htlcs,
                        minimum_depth,
 
-                       their_pubkeys,
-                       their_cur_commitment_point,
+                       counterparty_pubkeys,
+                       counterparty_cur_commitment_point,
 
-                       their_prev_commitment_point,
-                       their_node_id,
+                       counterparty_prev_commitment_point,
+                       counterparty_node_id,
 
-                       their_shutdown_scriptpubkey,
+                       counterparty_shutdown_scriptpubkey,
 
-                       channel_monitor: Some(channel_monitor),
                        commitment_secrets,
 
                        network_sync: UpdateStatus::Fresh,
-
-                       logger,
                })
        }
 }
 
 #[cfg(test)]
 mod tests {
-       use bitcoin::BitcoinHash;
        use bitcoin::util::bip143;
        use bitcoin::consensus::encode::serialize;
        use bitcoin::blockdata::script::{Script, Builder};
-       use bitcoin::blockdata::transaction::{Transaction, TxOut};
+       use bitcoin::blockdata::transaction::{Transaction, TxOut, SigHashType};
        use bitcoin::blockdata::constants::genesis_block;
        use bitcoin::blockdata::opcodes;
        use bitcoin::network::constants::Network;
-       use bitcoin_hashes::hex::FromHex;
+       use bitcoin::hashes::hex::FromHex;
        use hex;
        use ln::channelmanager::{HTLCSource, PaymentPreimage, PaymentHash};
        use ln::channel::{Channel,ChannelKeys,InboundHTLCOutput,OutboundHTLCOutput,InboundHTLCState,OutboundHTLCState,HTLCOutputInCommitment,TxCreationKeys};
@@ -4303,7 +4468,7 @@ mod tests {
        use ln::features::InitFeatures;
        use ln::msgs::{OptionalField, DataLossProtect};
        use ln::chan_utils;
-       use ln::chan_utils::{LocalCommitmentTransaction, ChannelPublicKeys};
+       use ln::chan_utils::{HolderCommitmentTransaction, ChannelPublicKeys};
        use chain::chaininterface::{FeeEstimator,ConfirmationTarget};
        use chain::keysinterface::{InMemoryChannelKeys, KeysInterface};
        use chain::transaction::OutPoint;
@@ -4311,20 +4476,18 @@ mod tests {
        use util::enforcing_trait_impls::EnforcingChannelKeys;
        use util::test_utils;
        use util::logger::Logger;
-       use secp256k1::{Secp256k1, Message, Signature, All};
-       use secp256k1::key::{SecretKey,PublicKey};
-       use bitcoin_hashes::sha256::Hash as Sha256;
-       use bitcoin_hashes::sha256d::Hash as Sha256dHash;
-       use bitcoin_hashes::hash160::Hash as Hash160;
-       use bitcoin_hashes::Hash;
+       use bitcoin::secp256k1::{Secp256k1, Message, Signature, All};
+       use bitcoin::secp256k1::key::{SecretKey,PublicKey};
+       use bitcoin::hashes::sha256::Hash as Sha256;
+       use bitcoin::hashes::Hash;
+       use bitcoin::hash_types::{Txid, WPubkeyHash};
        use std::sync::Arc;
-       use rand::{thread_rng,Rng};
 
        struct TestFeeEstimator {
-               fee_est: u64
+               fee_est: u32
        }
        impl FeeEstimator for TestFeeEstimator {
-               fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 {
+               fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
                        self.fee_est
                }
        }
@@ -4345,8 +4508,8 @@ mod tests {
                fn get_destination_script(&self) -> Script {
                        let secp_ctx = Secp256k1::signing_only();
                        let channel_monitor_claim_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
-                       let our_channel_monitor_claim_key_hash = Hash160::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
-                       Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
+                       let channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
+                       Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&channel_monitor_claim_key_hash[..]).into_script()
                }
 
                fn get_shutdown_pubkey(&self) -> PublicKey {
@@ -4358,73 +4521,94 @@ mod tests {
                fn get_channel_keys(&self, _inbound: bool, _channel_value_satoshis: u64) -> InMemoryChannelKeys {
                        self.chan_keys.clone()
                }
-               fn get_onion_rand(&self) -> (SecretKey, [u8; 32]) { panic!(); }
-               fn get_channel_id(&self) -> [u8; 32] { [0; 32] }
+               fn get_secure_random_bytes(&self) -> [u8; 32] { [0; 32] }
        }
 
        fn public_from_secret_hex(secp_ctx: &Secp256k1<All>, hex: &str) -> PublicKey {
                PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&hex::decode(hex).unwrap()[..]).unwrap())
        }
 
+       // Check that, during channel creation, we use the same feerate in the open channel message
+       // as we do in the Channel object creation itself.
+       #[test]
+       fn test_open_channel_msg_fee() {
+               let original_fee = 253;
+               let mut fee_est = TestFeeEstimator{fee_est: original_fee };
+               let secp_ctx = Secp256k1::new();
+               let seed = [42; 32];
+               let network = Network::Testnet;
+               let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
+
+               let node_a_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
+               let config = UserConfig::default();
+               let node_a_chan = Channel::<EnforcingChannelKeys>::new_outbound(&&fee_est, &&keys_provider, node_a_node_id, 10000000, 100000, 42, &config).unwrap();
+
+               // Now change the fee so we can check that the fee in the open_channel message is the
+               // same as the old fee.
+               fee_est.fee_est = 500;
+               let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
+               assert_eq!(open_channel_msg.feerate_per_kw, original_fee);
+       }
+
        #[test]
        fn channel_reestablish_no_updates() {
                let feeest = TestFeeEstimator{fee_est: 15000};
-               let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
+               let logger = test_utils::TestLogger::new();
                let secp_ctx = Secp256k1::new();
-               let mut seed = [0; 32];
-               let mut rng = thread_rng();
-               rng.fill_bytes(&mut seed);
+               let seed = [42; 32];
                let network = Network::Testnet;
-               let keys_provider = test_utils::TestKeysInterface::new(&seed, network, logger.clone() as Arc<Logger>);
+               let keys_provider = test_utils::TestKeysInterface::new(&seed, network);
 
                // Go through the flow of opening a channel between two nodes.
 
-               // Create Node A's channel
-               let node_a_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
+               // Create Node A's channel pointing to Node B's pubkey
+               let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
                let config = UserConfig::default();
-               let mut node_a_chan = Channel::<EnforcingChannelKeys>::new_outbound(&&feeest, &&keys_provider, node_a_node_id, 10000000, 100000, 42, Arc::clone(&logger), &config).unwrap();
+               let mut node_a_chan = Channel::<EnforcingChannelKeys>::new_outbound(&&feeest, &&keys_provider, node_b_node_id, 10000000, 100000, 42, &config).unwrap();
 
                // Create Node B's channel by receiving Node A's open_channel message
-               let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.bitcoin_hash(), &&feeest);
+               let open_channel_msg = node_a_chan.get_open_channel(genesis_block(network).header.block_hash());
                let node_b_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[7; 32]).unwrap());
-               let mut node_b_chan = Channel::<EnforcingChannelKeys>::new_from_req(&&feeest, &&keys_provider, node_b_node_id, InitFeatures::supported(), &open_channel_msg, 7, logger, &config).unwrap();
+               let mut node_b_chan = Channel::<EnforcingChannelKeys>::new_from_req(&&feeest, &&keys_provider, node_b_node_id, InitFeatures::known(), &open_channel_msg, 7, &config).unwrap();
 
                // Node B --> Node A: accept channel
                let accept_channel_msg = node_b_chan.get_accept_channel();
-               node_a_chan.accept_channel(&accept_channel_msg, &config, InitFeatures::supported()).unwrap();
+               node_a_chan.accept_channel(&accept_channel_msg, &config, InitFeatures::known()).unwrap();
 
                // Node A --> Node B: funding created
                let output_script = node_a_chan.get_funding_redeemscript();
                let tx = Transaction { version: 1, lock_time: 0, input: Vec::new(), output: vec![TxOut {
                        value: 10000000, script_pubkey: output_script.clone(),
                }]};
-               let funding_outpoint = OutPoint::new(tx.txid(), 0);
-               let funding_created_msg = node_a_chan.get_outbound_funding_created(funding_outpoint).unwrap();
-               let (funding_signed_msg, _) = node_b_chan.funding_created(&funding_created_msg).unwrap();
+               let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
+               let funding_created_msg = node_a_chan.get_outbound_funding_created(funding_outpoint, &&logger).unwrap();
+               let (funding_signed_msg, _) = node_b_chan.funding_created(&funding_created_msg, &&logger).unwrap();
 
                // Node B --> Node A: funding signed
-               let _ = node_a_chan.funding_signed(&funding_signed_msg);
+               let _ = node_a_chan.funding_signed(&funding_signed_msg, &&logger);
 
                // Now disconnect the two nodes and check that the commitment point in
                // Node B's channel_reestablish message is sane.
-               node_b_chan.remove_uncommitted_htlcs_and_mark_paused();
-               let expected_commitment_point = PublicKey::from_secret_key(&secp_ctx, &node_b_chan.build_local_commitment_secret(node_b_chan.cur_local_commitment_transaction_number + 1));
-               let msg = node_b_chan.get_channel_reestablish();
+               node_b_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger);
+               let msg = node_b_chan.get_channel_reestablish(&&logger);
+               assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
+               assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
                match msg.data_loss_protect {
-                       OptionalField::Present(DataLossProtect { my_current_per_commitment_point, .. }) => {
-                               assert_eq!(expected_commitment_point, my_current_per_commitment_point);
+                       OptionalField::Present(DataLossProtect { your_last_per_commitment_secret, .. }) => {
+                               assert_eq!(your_last_per_commitment_secret, [0; 32]);
                        },
                        _ => panic!()
                }
 
                // Check that the commitment point in Node A's channel_reestablish message
                // is sane.
-               node_a_chan.remove_uncommitted_htlcs_and_mark_paused();
-               let expected_commitment_point = PublicKey::from_secret_key(&secp_ctx, &node_a_chan.build_local_commitment_secret(node_a_chan.cur_local_commitment_transaction_number + 1));
-               let msg = node_a_chan.get_channel_reestablish();
+               node_a_chan.remove_uncommitted_htlcs_and_mark_paused(&&logger);
+               let msg = node_a_chan.get_channel_reestablish(&&logger);
+               assert_eq!(msg.next_local_commitment_number, 1); // now called next_commitment_number
+               assert_eq!(msg.next_remote_commitment_number, 0); // now called next_revocation_number
                match msg.data_loss_protect {
-                       OptionalField::Present(DataLossProtect { my_current_per_commitment_point, .. }) => {
-                               assert_eq!(expected_commitment_point, my_current_per_commitment_point);
+                       OptionalField::Present(DataLossProtect { your_last_per_commitment_secret, .. }) => {
+                               assert_eq!(your_last_per_commitment_secret, [0; 32]);
                        },
                        _ => panic!()
                }
@@ -4448,92 +4632,97 @@ mod tests {
                        // These aren't set in the test vectors:
                        [0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff],
                        10_000_000,
+                       (0, 0)
                );
 
-               assert_eq!(PublicKey::from_secret_key(&secp_ctx, chan_keys.funding_key()).serialize()[..],
+               assert_eq!(chan_keys.pubkeys().funding_pubkey.serialize()[..],
                                hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]);
                let keys_provider = Keys { chan_keys: chan_keys.clone() };
 
-               let their_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
+               let counterparty_node_id = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[42; 32]).unwrap());
                let mut config = UserConfig::default();
                config.channel_options.announced_channel = false;
-               let mut chan = Channel::<InMemoryChannelKeys>::new_outbound(&&feeest, &&keys_provider, their_node_id, 10_000_000, 100000, 42, Arc::clone(&logger), &config).unwrap(); // Nothing uses their network key in this test
-               chan.their_to_self_delay = 144;
-               chan.our_dust_limit_satoshis = 546;
+               let mut chan = Channel::<InMemoryChannelKeys>::new_outbound(&&feeest, &&keys_provider, counterparty_node_id, 10_000_000, 100000, 42, &config).unwrap(); // Nothing uses their network key in this test
+               chan.counterparty_selected_contest_delay = 144;
+               chan.holder_dust_limit_satoshis = 546;
 
-               let funding_info = OutPoint::new(Sha256dHash::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), 0);
+               let funding_info = OutPoint{ txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), index: 0 };
                chan.funding_txo = Some(funding_info);
 
-               let their_pubkeys = ChannelPublicKeys {
+               let counterparty_pubkeys = ChannelPublicKeys {
                        funding_pubkey: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
                        revocation_basepoint: PublicKey::from_slice(&hex::decode("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap(),
-                       payment_basepoint: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444"),
+                       payment_point: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444"),
                        delayed_payment_basepoint: public_from_secret_hex(&secp_ctx, "1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13"),
                        htlc_basepoint: public_from_secret_hex(&secp_ctx, "4444444444444444444444444444444444444444444444444444444444444444")
                };
-               chan_keys.set_remote_channel_pubkeys(&their_pubkeys);
+               chan_keys.on_accept(&counterparty_pubkeys, chan.counterparty_selected_contest_delay, chan.holder_selected_contest_delay);
 
-               assert_eq!(their_pubkeys.payment_basepoint.serialize()[..],
+               assert_eq!(counterparty_pubkeys.payment_point.serialize()[..],
                           hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
 
-               assert_eq!(their_pubkeys.funding_pubkey.serialize()[..],
+               assert_eq!(counterparty_pubkeys.funding_pubkey.serialize()[..],
                           hex::decode("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]);
 
-               assert_eq!(their_pubkeys.htlc_basepoint.serialize()[..],
+               assert_eq!(counterparty_pubkeys.htlc_basepoint.serialize()[..],
                           hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]);
 
-               // We can't just use build_local_transaction_keys here as the per_commitment_secret is not
+               // We can't just use build_holder_transaction_keys here as the per_commitment_secret is not
                // derived from a commitment_seed, so instead we copy it here and call
                // build_commitment_transaction.
-               let delayed_payment_base = PublicKey::from_secret_key(&secp_ctx, chan.local_keys.delayed_payment_base_key());
+               let delayed_payment_base = &chan.holder_keys.pubkeys().delayed_payment_basepoint;
                let per_commitment_secret = SecretKey::from_slice(&hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
                let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
-               let htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, chan.local_keys.htlc_base_key());
-               let keys = TxCreationKeys::new(&secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &their_pubkeys.revocation_basepoint, &their_pubkeys.payment_basepoint, &their_pubkeys.htlc_basepoint).unwrap();
+               let htlc_basepoint = &chan.holder_keys.pubkeys().htlc_basepoint;
+               let keys = TxCreationKeys::derive_new(&secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint).unwrap();
 
-               chan.their_pubkeys = Some(their_pubkeys);
+               chan.counterparty_pubkeys = Some(counterparty_pubkeys);
 
                let mut unsigned_tx: (Transaction, Vec<HTLCOutputInCommitment>);
 
-               let mut localtx;
+               let mut holdertx;
                macro_rules! test_commitment {
-                       ( $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr, {
-                               $( { $htlc_idx: expr, $their_htlc_sig_hex: expr, $our_htlc_sig_hex: expr, $htlc_tx_hex: expr } ), *
-                       } ) => {
+                       ( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, {
+                               $( { $htlc_idx: expr, $counterparty_htlc_sig_hex: expr, $htlc_sig_hex: expr, $htlc_tx_hex: expr } ), *
+                       } ) => { {
                                unsigned_tx = {
-                                       let mut res = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false, chan.feerate_per_kw);
+                                       let mut res = chan.build_commitment_transaction(0xffffffffffff - 42, &keys, true, false, chan.feerate_per_kw, &logger);
                                        let htlcs = res.2.drain(..)
                                                .filter_map(|(htlc, _)| if htlc.transaction_output_index.is_some() { Some(htlc) } else { None })
                                                .collect();
                                        (res.0, htlcs)
                                };
                                let redeemscript = chan.get_funding_redeemscript();
-                               let their_signature = Signature::from_der(&hex::decode($their_sig_hex).unwrap()[..]).unwrap();
-                               let sighash = Message::from_slice(&bip143::SighashComponents::new(&unsigned_tx.0).sighash_all(&unsigned_tx.0.input[0], &redeemscript, chan.channel_value_satoshis)[..]).unwrap();
-                               secp_ctx.verify(&sighash, &their_signature, chan.their_funding_pubkey()).unwrap();
+                               let counterparty_signature = Signature::from_der(&hex::decode($counterparty_sig_hex).unwrap()[..]).unwrap();
+                               let sighash = Message::from_slice(&bip143::SigHashCache::new(&unsigned_tx.0).signature_hash(0, &redeemscript, chan.channel_value_satoshis, SigHashType::All)[..]).unwrap();
+                               secp_ctx.verify(&sighash, &counterparty_signature, chan.counterparty_funding_pubkey()).unwrap();
 
                                let mut per_htlc = Vec::new();
                                per_htlc.clear(); // Don't warn about excess mut for no-HTLC calls
                                $({
-                                       let remote_signature = Signature::from_der(&hex::decode($their_htlc_sig_hex).unwrap()[..]).unwrap();
+                                       let remote_signature = Signature::from_der(&hex::decode($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
                                        per_htlc.push((unsigned_tx.1[$htlc_idx].clone(), Some(remote_signature)));
                                })*
                                assert_eq!(unsigned_tx.1.len(), per_htlc.len());
 
-                               localtx = LocalCommitmentTransaction::new_missing_local_sig(unsigned_tx.0.clone(), &their_signature, &PublicKey::from_secret_key(&secp_ctx, chan.local_keys.funding_key()), chan.their_funding_pubkey(), keys.clone(), chan.feerate_per_kw, per_htlc);
-                               chan_keys.sign_local_commitment(&mut localtx, &chan.secp_ctx);
+                               holdertx = HolderCommitmentTransaction::new_missing_holder_sig(unsigned_tx.0.clone(), counterparty_signature.clone(), &chan_keys.pubkeys().funding_pubkey, chan.counterparty_funding_pubkey(), keys.clone(), chan.feerate_per_kw, per_htlc);
+                               let holder_sig = chan_keys.sign_holder_commitment(&holdertx, &chan.secp_ctx).unwrap();
+                               assert_eq!(Signature::from_der(&hex::decode($sig_hex).unwrap()[..]).unwrap(), holder_sig);
 
-                               assert_eq!(serialize(localtx.with_valid_witness())[..],
+                               assert_eq!(serialize(&holdertx.add_holder_sig(&redeemscript, holder_sig))[..],
                                                hex::decode($tx_hex).unwrap()[..]);
 
+                               let htlc_sigs = chan_keys.sign_holder_commitment_htlc_transactions(&holdertx, &chan.secp_ctx).unwrap();
+                               let mut htlc_sig_iter = holdertx.per_htlc.iter().zip(htlc_sigs.iter().enumerate());
+
                                $({
-                                       let remote_signature = Signature::from_der(&hex::decode($their_htlc_sig_hex).unwrap()[..]).unwrap();
+                                       let remote_signature = Signature::from_der(&hex::decode($counterparty_htlc_sig_hex).unwrap()[..]).unwrap();
 
                                        let ref htlc = unsigned_tx.1[$htlc_idx];
                                        let htlc_tx = chan.build_htlc_transaction(&unsigned_tx.0.txid(), &htlc, true, &keys, chan.feerate_per_kw);
                                        let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys);
-                                       let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx.input[0], &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap();
-                                       secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.b_htlc_key).unwrap();
+                                       let htlc_sighash = Message::from_slice(&bip143::SigHashCache::new(&htlc_tx).signature_hash(0, &htlc_redeemscript, htlc.amount_msat / 1000, SigHashType::All)[..]).unwrap();
+                                       secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.countersignatory_htlc_key).unwrap();
 
                                        let mut preimage: Option<PaymentPreimage> = None;
                                        if !htlc.offered {
@@ -4547,22 +4736,29 @@ mod tests {
                                                assert!(preimage.is_some());
                                        }
 
-                                       chan_keys.sign_htlc_transaction(&mut localtx, $htlc_idx, preimage, chan.their_to_self_delay, &chan.secp_ctx);
+                                       let mut htlc_sig = htlc_sig_iter.next().unwrap();
+                                       while (htlc_sig.1).1.is_none() { htlc_sig = htlc_sig_iter.next().unwrap(); }
+                                       assert_eq!((htlc_sig.0).0.transaction_output_index, Some($htlc_idx));
 
-                                       assert_eq!(serialize(localtx.htlc_with_valid_witness($htlc_idx).as_ref().unwrap())[..],
+                                       let signature = Signature::from_der(&hex::decode($htlc_sig_hex).unwrap()[..]).unwrap();
+                                       assert_eq!(Some(signature), *(htlc_sig.1).1);
+                                       assert_eq!(serialize(&holdertx.get_signed_htlc_tx((htlc_sig.1).0, &(htlc_sig.1).1.unwrap(), &preimage, chan.counterparty_selected_contest_delay))[..],
                                                        hex::decode($htlc_tx_hex).unwrap()[..]);
                                })*
-                       }
+                               loop {
+                                       let htlc_sig = htlc_sig_iter.next();
+                                       if htlc_sig.is_none() { break; }
+                                       assert!((htlc_sig.unwrap().1).1.is_none());
+                               }
+                       } }
                }
 
-               {
-                       // simple commitment tx with no HTLCs
-                       chan.value_to_self_msat = 7000000000;
+               // simple commitment tx with no HTLCs
+               chan.value_to_self_msat = 7000000000;
 
-                       test_commitment!("3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0",
-                                        "3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939",
-                                        "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", {});
-               }
+               test_commitment!("3045022100c3127b33dcc741dd6b05b1e63cbd1a9a7d816f37af9b6756fa2376b056f032370220408b96279808fe57eb7e463710804cdf4f108388bc5cf722d8c848d2c7f9f3b0",
+                                                "30440220616210b2cc4d3afb601013c373bbd8aac54febd9f15400379a8cb65ce7deca60022034236c010991beb7ff770510561ae8dc885b8d38d1947248c38f2ae055647142",
+                                                "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", {});
 
                chan.pending_inbound_htlcs.push({
                        let mut out = InboundHTLCOutput{
@@ -4626,273 +4822,273 @@ mod tests {
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 0;
 
-               test_commitment!("304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606",
-                                "30440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f06",
-                                "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", {
+               test_commitment!("3044022009b048187705a8cbc9ad73adbe5af148c3d012e1f067961486c822c7af08158c022006d66f3704cfab3eb2dc49dae24e4aa22a6910fc9b424007583204e3621af2e5",
+                                "304402206fc2d1f10ea59951eefac0b4b7c396a3c3d87b71ff0b019796ef4535beaf36f902201765b0181e514d04f4c8ad75659d7037be26cdb3f8bb6f78fe61decef484c3ea",
+                                "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", {
 
                                  { 0,
-                                 "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6",
-                                 "304402207cb324fa0de88f452ffa9389678127ebcf4cabe1dd848b8e076c1a1962bf34720220116ed922b12311bd602d67e60d2529917f21c5b82f25ff6506c0f87886b4dfd5",
-                                 "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"},
+                                 "3045022100d9e29616b8f3959f1d3d7f7ce893ffedcdc407717d0de8e37d808c91d3a7c50d022078c3033f6d00095c8720a4bc943c1b45727818c082e4e3ddbc6d3116435b624b",
+                                 "30440220636de5682ef0c5b61f124ec74e8aa2461a69777521d6998295dcea36bc3338110220165285594b23c50b28b82df200234566628a27bcd17f7f14404bd865354eb3ce",
+                                 "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" },
 
                                  { 1,
-                                 "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b",
-                                 "3045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be5",
-                                 "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"},
+                                 "30440220649fe8b20e67e46cbb0d09b4acea87dbec001b39b08dee7bdd0b1f03922a8640022037c462dff79df501cecfdb12ea7f4de91f99230bb544726f6e04527b1f896004",
+                                 "3045022100803159dee7935dba4a1d36a61055ce8fd62caa528573cc221ae288515405a252022029c59e7cffce374fe860100a4a63787e105c3cf5156d40b12dd53ff55ac8cf3f",
+                                 "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" },
 
                                  { 2,
-                                 "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202",
-                                 "3045022100def389deab09cee69eaa1ec14d9428770e45bcbe9feb46468ecf481371165c2f022015d2e3c46600b2ebba8dcc899768874cc6851fd1ecb3fffd15db1cc3de7e10da",
-                                 "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"},
+                                 "30440220770fc321e97a19f38985f2e7732dd9fe08d16a2efa4bcbc0429400a447faf49102204d40b417f3113e1b0944ae0986f517564ab4acd3d190503faf97a6e420d43352",
+                                 "3045022100a437cc2ce77400ecde441b3398fea3c3ad8bdad8132be818227fe3c5b8345989022069d45e7fa0ae551ec37240845e2c561ceb2567eacf3076a6a43a502d05865faa",
+                                 "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" },
 
                                  { 3,
-                                 "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554",
-                                 "30440220643aacb19bbb72bd2b635bc3f7375481f5981bace78cdd8319b2988ffcc6704202203d27784ec8ad51ed3bd517a05525a5139bb0b755dd719e0054332d186ac08727",
-                                 "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"},
-
-                                { 4,
-                                 "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d",
-                                 "30440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e",
-                                 "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"}
+                                 "304402207bcbf4f60a9829b05d2dbab84ed593e0291836be715dc7db6b72a64caf646af802201e489a5a84f7c5cc130398b841d138d031a5137ac8f4c49c770a4959dc3c1363",
+                                 "304402203121d9b9c055f354304b016a36662ee99e1110d9501cb271b087ddb6f382c2c80220549882f3f3b78d9c492de47543cb9a697cecc493174726146536c5954dac7487",
+                                 "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" },
+
+                                 { 4,
+                                 "3044022076dca5cb81ba7e466e349b7128cdba216d4d01659e29b96025b9524aaf0d1899022060de85697b88b21c749702b7d2cfa7dfeaa1f472c8f1d7d9c23f2bf968464b87",
+                                 "3045022100d9080f103cc92bac15ec42464a95f070c7fb6925014e673ee2ea1374d36a7f7502200c65294d22eb20d48564954d5afe04a385551919d8b2ddb4ae2459daaeee1d95",
+                                 "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" }
                } );
 
                // commitment tx with seven outputs untrimmed (maximum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 647;
 
-               test_commitment!("3045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b",
-                                "304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d1163",
-                                "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", {
-
-                                { 0,
-                                 "30440220385a5afe75632f50128cbb029ee95c80156b5b4744beddc729ad339c9ca432c802202ba5f48550cad3379ac75b9b4fedb86a35baa6947f16ba5037fb8b11ab343740",
-                                 "304402205999590b8a79fa346e003a68fd40366397119b2b0cdf37b149968d6bc6fbcc4702202b1e1fb5ab7864931caed4e732c359e0fe3d86a548b557be2246efb1708d579a",
-                                 "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"},
-
-                                { 1,
-                                 "304402207ceb6678d4db33d2401fdc409959e57c16a6cb97a30261d9c61f29b8c58d34b90220084b4a17b4ca0e86f2d798b3698ca52de5621f2ce86f80bed79afa66874511b0",
-                                 "304402207ff03eb0127fc7c6cae49cc29e2a586b98d1e8969cf4a17dfa50b9c2647720b902205e2ecfda2252956c0ca32f175080e75e4e390e433feb1f8ce9f2ba55648a1dac",
-                                 "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"},
-
-                                { 2,
-                                 "304402206a401b29a0dff0d18ec903502c13d83e7ec019450113f4a7655a4ce40d1f65ba0220217723a084e727b6ca0cc8b6c69c014a7e4a01fcdcba3e3993f462a3c574d833",
-                                 "3045022100d50d067ca625d54e62df533a8f9291736678d0b86c28a61bb2a80cf42e702d6e02202373dde7e00218eacdafb9415fe0e1071beec1857d1af3c6a201a44cbc47c877",
-                                 "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"},
-
-                                { 3,
-                                 "30450221009b1c987ba599ee3bde1dbca776b85481d70a78b681a8d84206723e2795c7cac002207aac84ad910f8598c4d1c0ea2e3399cf6627a4e3e90131315bc9f038451ce39d",
-                                 "3045022100db9dc65291077a52728c622987e9895b7241d4394d6dcb916d7600a3e8728c22022036ee3ee717ba0bb5c45ee84bc7bbf85c0f90f26ae4e4a25a6b4241afa8a3f1cb",
-                                 "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"},
-
-                                { 4,
-                                 "3045022100cc28030b59f0914f45b84caa983b6f8effa900c952310708c2b5b00781117022022027ba2ccdf94d03c6d48b327f183f6e28c8a214d089b9227f94ac4f85315274f0",
-                                 "304402202d1a3c0d31200265d2a2def2753ead4959ae20b4083e19553acfffa5dfab60bf022020ede134149504e15b88ab261a066de49848411e15e70f9e6a5462aec2949f8f",
-                                 "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"}
-               });
+               test_commitment!("3045022100a135f9e8a5ed25f7277446c67956b00ce6f610ead2bdec2c2f686155b7814772022059f1f6e1a8b336a68efcc1af3fe4d422d4827332b5b067501b099c47b7b5b5ee",
+                                "30450221009ec15c687898bb4da8b3a833e5ab8bfc51ec6e9202aaa8e66611edfd4a85ed1102203d7183e45078b9735c93450bc3415d3e5a8c576141a711ec6ddcb4a893926bb7",
+                                "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", {
+
+                                 { 0,
+                                 "30450221008437627f9ad84ac67052e2a414a4367b8556fd1f94d8b02590f89f50525cd33502205b9c21ff6e7fc864f2352746ad8ba59182510819acb644e25b8a12fc37bbf24f",
+                                 "30440220344b0deb055230d01703e6c7acd45853c4af2328b49b5d8af4f88a060733406602202ea64f2a43d5751edfe75503cbc35a62e3141b5ed032fa03360faf4ca66f670b",
+                                 "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" },
+
+                                 { 1,
+                                 "304402205a67f92bf6845cf2892b48d874ac1daf88a36495cf8a06f93d83180d930a6f75022031da1621d95c3f335cc06a3056cf960199dae600b7cf89088f65fc53cdbef28c",
+                                 "30450221009e5e3822b0185c6799a95288c597b671d6cc69ab80f43740f00c6c3d0752bdda02206da947a74bd98f3175324dc56fdba86cc783703a120a6f0297537e60632f4c7f",
+                                 "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" },
+
+                                 { 2,
+                                 "30440220437e21766054a3eef7f65690c5bcfa9920babbc5af92b819f772f6ea96df6c7402207173622024bd97328cfb26c6665e25c2f5d67c319443ccdc60c903217005d8c8",
+                                 "3045022100fcfc47e36b712624677626cef3dc1d67f6583bd46926a6398fe6b00b0c9a37760220525788257b187fc775c6370d04eadf34d06f3650a63f8df851cee0ecb47a1673",
+                                 "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" },
+
+                                 { 3,
+                                 "304402207436e10737e4df499fc051686d3e11a5bb2310e4d1f1e691d287cef66514791202207cb58e71a6b7a42dd001b7e3ae672ea4f71ea3e1cd412b742e9124abb0739c64",
+                                 "3045022100e78211b8409afb7255ffe37337da87f38646f1faebbdd61bc1920d69e3ead67a02201a626305adfcd16bfb7e9340928d9b6305464eab4aa4c4a3af6646e9b9f69dee",
+                                 "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" },
+
+                                 { 4,
+                                 "30450221009acd6a827a76bfee50806178dfe0495cd4e1d9c58279c194c7b01520fe68cb8d022024d439047c368883e570997a7d40f0b430cb5a742f507965e7d3063ae3feccca",
+                                 "3044022048762cf546bbfe474f1536365ea7c416e3c0389d60558bc9412cb148fb6ab68202207215d7083b75c96ff9d2b08c59c34e287b66820f530b486a9aa4cdd9c347d5b9",
+                                 "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" }
+               } );
 
                // commitment tx with six outputs untrimmed (minimum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 648;
 
-               test_commitment!("3044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b057",
-                                "3045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de",
-                                "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8006d007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5d007000000000000220020748eba944fedc8827f6b06bc44678f93c0f9e6078b35c6331ed31e75f8ce0c2db80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de8431104e9d6a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0400483045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de01473044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b05701475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
-
-                                { 0,
-                                 "3044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada8",
-                                 "3045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc098",
-                                 "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"},
-
-                                { 1,
-                                 "3045022100e968cbbb5f402ed389fdc7f6cd2a80ed650bb42c79aeb2a5678444af94f6c78502204b47a1cb24ab5b0b6fe69fe9cfc7dba07b9dd0d8b95f372c1d9435146a88f8d4",
-                                 "304402207679cf19790bea76a733d2fa0672bd43ab455687a068f815a3d237581f57139a0220683a1a799e102071c206b207735ca80f627ab83d6616b4bcd017c5d79ef3e7d0",
-                                 "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"},
-
-                                { 2,
-                                 "3045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c2",
-                                 "304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda3",
-                                 "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"},
-
-                                { 3,
-                                 "3044022035cac88040a5bba420b1c4257235d5015309113460bc33f2853cd81ca36e632402202fc94fd3e81e9d34a9d01782a0284f3044370d03d60f3fc041e2da088d2de58f",
-                                 "304402200daf2eb7afd355b4caf6fb08387b5f031940ea29d1a9f35071288a839c9039e4022067201b562456e7948616c13acb876b386b511599b58ac1d94d127f91c50463a6",
-                                 "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"}
-               });
+               test_commitment!("304402203948f900a5506b8de36a4d8502f94f21dd84fd9c2314ab427d52feaa7a0a19f2022059b6a37a4adaa2c5419dc8aea63c6e2a2ec4c4bde46207f6dc1fcd22152fc6e5",
+                                "3045022100b15f72908ba3382a34ca5b32519240a22300cc6015b6f9418635fb41f3d01d8802207adb331b9ed1575383dca0f2355e86c173802feecf8298fbea53b9d4610583e9",
+                                "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", {
+
+                                 { 0,
+                                 "3045022100a031202f3be94678f0e998622ee95ebb6ada8da1e9a5110228b5e04a747351e4022010ca6a21e18314ed53cfaae3b1f51998552a61a468e596368829a50ce40110e0",
+                                 "304502210097e1873b57267730154595187a34949d3744f52933070c74757005e61ce2112e02204ecfba2aa42d4f14bdf8bad4206bb97217b702e6c433e0e1b0ce6587e6d46ec6",
+                                 "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" },
+
+                                 { 1,
+                                 "304402202361012a634aee7835c5ecdd6413dcffa8f404b7e77364c792cff984e4ee71e90220715c5e90baa08daa45a7439b1ee4fa4843ed77b19c058240b69406606d384124",
+                                 "3044022019de73b00f1d818fb388e83b2c8c31f6bce35ac624e215bc12f88f9dc33edf48022006ff814bb9f700ee6abc3294e146fac3efd4f13f0005236b41c0a946ee00c9ae",
+                                 "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" },
+
+                                 { 2,
+                                 "304402207e8e82cd71ed4febeb593732c260456836e97d81896153ecd2b3cf320ca6861702202dd4a30f68f98ced7cc56a36369ac1fdd978248c5ff4ed204fc00cc625532989",
+                                 "3045022100bd0be6100c4fd8f102ec220e1b053e4c4e2ecca25615490150007b40d314dc3902201a1e0ea266965b43164d9e6576f58fa6726d42883dd1c3996d2925c2e2260796",
+                                 "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" },
+
+                                 { 3,
+                                 "3044022024cd52e4198c8ae0e414a86d86b5a65ea7450f2eb4e783096736d93395eca5ce022078f0094745b45be4d4b2b04dd5978c9e66ba49109e5704403e84aaf5f387d6be",
+                                 "3045022100bbfb9d0a946d420807c86e985d636cceb16e71c3694ed186316251a00cbd807202207773223f9a337e145f64673825be9b30d07ef1542c82188b264bedcf7cda78c6",
+                                 "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" }
+               } );
 
                // commitment tx with six outputs untrimmed (maximum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 2069;
 
-               test_commitment!("3044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb4",
-                                "304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea",
-                                "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", {
-
-                                { 0,
-                                 "3045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f992",
-                                 "3044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae66402",
-                                 "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"},
-
-                                { 1,
-                                 "3045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f4",
-                                 "3045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f",
-                                 "02000000000101ca94a9ad516ebc0c4bdd7b6254871babfa978d5accafb554214137d398bfcf6a0100000000000000000122020000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f401483045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f012001010101010101010101010101010101010101010101010101010101010101018a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a9144b6b2e5444c2639cc0fb7bcea5afba3f3cdce23988527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f501b175ac686800000000"},
-
-                                { 2,
-                                 "3045022100d4e69d363de993684eae7b37853c40722a4c1b4a7b588ad7b5d8a9b5006137a102207a069c628170ee34be5612747051bdcc087466dbaa68d5756ea81c10155aef18",
-                                 "304402200e362443f7af830b419771e8e1614fc391db3a4eb799989abfc5ab26d6fcd032022039ab0cad1c14dfbe9446bf847965e56fe016e0cbcf719fd18c1bfbf53ecbd9f9",
-                                 "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"},
-
-                                { 3,
-                                 "30450221008ec888e36e4a4b3dc2ed6b823319855b2ae03006ca6ae0d9aa7e24bfc1d6f07102203b0f78885472a67ff4fe5916c0bb669487d659527509516fc3a08e87a2cc0a7c",
-                                 "304402202c3e14282b84b02705dfd00a6da396c9fe8a8bcb1d3fdb4b20a4feba09440e8b02202b058b39aa9b0c865b22095edcd9ff1f71bbfe20aa4993755e54d042755ed0d5",
-                                 "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" }
-               });
+               test_commitment!("304502210090b96a2498ce0c0f2fadbec2aab278fed54c1a7838df793ec4d2c78d96ec096202204fdd439c50f90d483baa7b68feeef4bd33bc277695405447bcd0bfb2ca34d7bc",
+                                "3045022100ad9a9bbbb75d506ca3b716b336ee3cf975dd7834fcf129d7dd188146eb58a8b4022061a759ee417339f7fe2ea1e8deb83abb6a74db31a09b7648a932a639cda23e33",
+                                "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", {
+
+                                 { 0,
+                                 "3045022100f33513ee38abf1c582876f921f8fddc06acff48e04515532a32d3938de938ffd02203aa308a2c1863b7d6fdf53159a1465bf2e115c13152546cc5d74483ceaa7f699",
+                                 "3045022100a637902a5d4c9ba9e7c472a225337d5aac9e2e3f6744f76e237132e7619ba0400220035c60d784a031c0d9f6df66b7eab8726a5c25397399ee4aa960842059eb3f9d",
+                                 "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" },
+
+                                 { 1,
+                                 "3045022100ce07682cf4b90093c22dc2d9ab2a77ad6803526b655ef857221cc96af5c9e0bf02200f501cee22e7a268af40b555d15a8237c9f36ad67ef1841daf9f6a0267b1e6df",
+                                 "3045022100e57e46234f8782d3ff7aa593b4f7446fb5316c842e693dc63ee324fd49f6a1c302204a2f7b44c48bd26e1554422afae13153eb94b29d3687b733d18930615fb2db61",
+                                 "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" },
+
+                                 { 2,
+                                 "3045022100e3e35492e55f82ec0bc2f317ffd7a486d1f7024330fe9743c3559fc39f32ef0c02203d1d4db651fc388a91d5ad8ecdd8e83673063bc8eefe27cfd8c189090e3a23e0",
+                                 "3044022068613fb1b98eb3aec7f44c5b115b12343c2f066c4277c82b5f873dfe68f37f50022028109b4650f3f528ca4bfe9a467aff2e3e43893b61b5159157119d5d95cf1c18",
+                                 "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" },
+
+                                 { 3,
+                                 "304402207475aeb0212ef9bf5130b60937817ad88c9a87976988ef1f323f026148cc4a850220739fea17ad3257dcad72e509c73eebe86bee30b178467b9fdab213d631b109df",
+                                 "3045022100d315522e09e7d53d2a659a79cb67fef56d6c4bddf3f46df6772d0d20a7beb7c8022070bcc17e288607b6a72be0bd83368bb6d53488db266c1cdb4d72214e4f02ac33",
+                                 "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" }
+               } );
 
                // commitment tx with five outputs untrimmed (minimum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 2070;
 
-               test_commitment!("3045022100f2377f7a67b7fc7f4e2c0c9e3a7de935c32417f5668eda31ea1db401b7dc53030220415fdbc8e91d0f735e70c21952342742e25249b0d062d43efbfc564499f37526",
-                                "30440220443cb07f650aebbba14b8bc8d81e096712590f524c5991ac0ed3bbc8fd3bd0c7022028a635f548e3ca64b19b69b1ea00f05b22752f91daf0b6dab78e62ba52eb7fd0",
-                                "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", {
+               test_commitment!("304402204ca1ba260dee913d318271d86e10ca0f5883026fb5653155cff600fb40895223022037b145204b7054a40e08bb1fefbd826f827b40838d3e501423bcc57924bcb50c",
+                                "3044022001014419b5ba00e083ac4e0a85f19afc848aacac2d483b4b525d15e2ae5adbfe022015ebddad6ee1e72b47cb09f3e78459da5be01ccccd95dceca0e056a00cc773c1",
+                                "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", {
 
-                                { 0,
-                                 "3045022100eed143b1ee4bed5dc3cde40afa5db3e7354cbf9c44054b5f713f729356f08cf7022077161d171c2bbd9badf3c9934de65a4918de03bbac1450f715275f75b103f891",
-                                 "3045022100a0d043ed533e7fb1911e0553d31a8e2f3e6de19dbc035257f29d747c5e02f1f5022030cd38d8e84282175d49c1ebe0470db3ebd59768cf40780a784e248a43904fb8",
-                                 "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"},
+                                 { 0,
+                                 "304402205f6b6d12d8d2529fb24f4445630566cf4abbd0f9330ab6c2bdb94222d6a2a0c502202f556258ae6f05b193749e4c541dfcc13b525a5422f6291f073f15617ba8579b",
+                                 "30440220150b11069454da70caf2492ded9e0065c9a57f25ac2a4c52657b1d15b6c6ed85022068a38833b603c8892717206383611bad210f1cbb4b1f87ea29c6c65b9e1cb3e5",
+                                 "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" },
 
-                                { 1,
-                                 "3044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf6",
-                                 "3045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d",
-                                 "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"},
+                                 { 1,
+                                 "3045022100f960dfb1c9aee7ce1437efa65b523e399383e8149790e05d8fed27ff6e42fe0002202fe8613e062ffe0b0c518cc4101fba1c6de70f64a5bcc7ae663f2efae43b8546",
+                                 "30450221009a6ed18e6873bc3644332a6ee21c152a5b102821865350df7a8c74451a51f9f2022050d801fb4895d7d7fbf452824c0168347f5c0cbe821cf6a97a63af5b8b2563c6",
+                                 "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" },
 
-                                { 2,
-                                 "3045022100c9458a4d2cbb741705577deb0a890e5cb90ee141be0400d3162e533727c9cb2102206edcf765c5dc5e5f9b976ea8149bf8607b5a0efb30691138e1231302b640d2a4",
-                                 "304402200831422aa4e1ee6d55e0b894201770a8f8817a189356f2d70be76633ffa6a6f602200dd1b84a4855dc6727dd46c98daae43dfc70889d1ba7ef0087529a57c06e5e04",
-                                 "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"}
-               });
+                                 { 2,
+                                 "3045022100ae5fc7717ae684bc1fcf9020854e5dbe9842c9e7472879ac06ff95ac2bb10e4e022057728ada4c00083a3e65493fb5d50a232165948a1a0f530ef63185c2c8c56504",
+                                 "30440220408ad3009827a8fccf774cb285587686bfb2ed041f89a89453c311ce9c8ee0f902203c7392d9f8306d3a46522a66bd2723a7eb2628cb2d9b34d4c104f1766bf37502",
+                                 "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" }
+               } );
 
                // commitment tx with five outputs untrimmed (maximum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 2194;
 
-               test_commitment!("3045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec86203953348",
-                                "304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f7061",
-                                "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", {
+               test_commitment!("304402204bb3d6e279d71d9da414c82de42f1f954267c762b2e2eb8b76bc3be4ea07d4b0022014febc009c5edc8c3fc5d94015de163200f780046f1c293bfed8568f08b70fb3",
+                                "3044022072c2e2b1c899b2242656a537dde2892fa3801be0d6df0a87836c550137acde8302201654aa1974d37a829083c3ba15088689f30b56d6a4f6cb14c7bad0ee3116d398",
+                                "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", {
 
-                                { 0,
-                                 "30450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf44",
-                                 "3044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f",
-                                 "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"},
+                                 { 0,
+                                 "3045022100939726680351a7856c1bc386d4a1f422c7d29bd7b56afc139570f508474e6c40022023175a799ccf44c017fbaadb924c40b2a12115a5b7d0dfd3228df803a2de8450",
+                                 "304502210099c98c2edeeee6ec0fb5f3bea8b79bb016a2717afa9b5072370f34382de281d302206f5e2980a995e045cf90a547f0752a7ee99d48547bc135258fe7bc07e0154301",
+                                 "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" },
 
-                                { 1,
-                                 "30440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d",
-                                 "304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c915",
-                                 "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"},
+                                 { 1,
+                                 "3044022021bb883bf324553d085ba2e821cad80c28ef8b303dbead8f98e548783c02d1600220638f9ef2a9bba25869afc923f4b5dc38be3bb459f9efa5d869392d5f7779a4a0",
+                                 "3045022100fd85bd7697b89c08ec12acc8ba89b23090637d83abd26ca37e01ae93e67c367302202b551fe69386116c47f984aab9c8dfd25d864dcde5d3389cfbef2447a85c4b77",
+                                 "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" },
 
-                                { 2,
-                                 "3045022100a12a9a473ece548584aabdd051779025a5ed4077c4b7aa376ec7a0b1645e5a48022039490b333f53b5b3e2ddde1d809e492cba2b3e5fc3a436cd3ffb4cd3d500fa5a",
-                                 "3045022100ff200bc934ab26ce9a559e998ceb0aee53bc40368e114ab9d3054d9960546e2802202496856ca163ac12c143110b6b3ac9d598df7254f2e17b3b94c3ab5301f4c3b0",
-                                 "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"}
-               });
+                                 { 2,
+                                 "3045022100c9e6f0454aa598b905a35e641a70cc9f67b5f38cc4b00843a041238c4a9f1c4a0220260a2822a62da97e44583e837245995ca2e36781769c52f19e498efbdcca262b",
+                                 "30450221008a9f2ea24cd455c2b64c1472a5fa83865b0a5f49a62b661801e884cf2849af8302204d44180e50bf6adfcf1c1e581d75af91aba4e28681ce4a5ee5f3cbf65eca10f3",
+                                 "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" }
+               } );
 
                // commitment tx with four outputs untrimmed (minimum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 2195;
 
-               test_commitment!("304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb7924298",
-                                "304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a5429",
-                                "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", {
+               test_commitment!("304402201a8c1b1f9671cd9e46c7323a104d7047cc48d3ee80d40d4512e0c72b8dc65666022066d7f9a2ce18c9eb22d2739ffcce05721c767f9b607622a31b6ea5793ddce403",
+                                "3044022044d592025b610c0d678f65032e87035cdfe89d1598c522cc32524ae8172417c30220749fef9d5b2ae8cdd91ece442ba8809bc891efedae2291e578475f97715d1767",
+                                "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", {
 
-                                { 0,
-                                 "3045022100a8a78fa1016a5c5c3704f2e8908715a3cef66723fb95f3132ec4d2d05cd84fb4022025ac49287b0861ec21932405f5600cbce94313dbde0e6c5d5af1b3366d8afbfc",
-                                 "3045022100be6ae1977fd7b630a53623f3f25c542317ccfc2b971782802a4f1ef538eb22b402207edc4d0408f8f38fd3c7365d1cfc26511b7cd2d4fecd8b005fba3cd5bc704390",
-                                 "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"},
+                                 { 0,
+                                 "3045022100e57b845066a06ee7c2cbfc29eabffe52daa9bf6f6de760066d04df9f9b250e0002202ffb197f0e6e0a77a75a9aff27014bd3de83b7f748d7efef986abe655e1dd50e",
+                                 "3045022100ecc8c6529d0b2316d046f0f0757c1e1c25a636db168ec4f3aa1b9278df685dc0022067ae6b65e936f1337091f7b18a15935b608c5f2cdddb2f892ed0babfdd376d76",
+                                 "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" },
 
-                                { 1,
-                                 "3045022100e769cb156aa2f7515d126cef7a69968629620ce82afcaa9e210969de6850df4602200b16b3f3486a229a48aadde520dbee31ae340dbadaffae74fbb56681fef27b92",
-                                 "30440220665b9cb4a978c09d1ca8977a534999bc8a49da624d0c5439451dd69cde1a003d022070eae0620f01f3c1bd029cc1488da13fb40fdab76f396ccd335479a11c5276d8",
-                                 "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"}
-               });
+                                 { 1,
+                                 "3045022100d193b7ecccad8057571620a0b1ffa6c48e9483311723b59cf536043b20bc51550220546d4bd37b3b101ecda14f6c907af46ec391abce1cd9c7ce22b1a62b534f2f2a",
+                                 "3044022014d66f11f9cacf923807eba49542076c5fe5cccf252fb08fe98c78ef3ca6ab5402201b290dbe043cc512d9d78de074a5a129b8759bc6a6c546b190d120b690bd6e82",
+                                 "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" }
+               } );
 
                // commitment tx with four outputs untrimmed (maximum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 3702;
 
-               test_commitment!("3045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c1",
-                                "304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b0",
-                                "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8004b80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de8431106f916a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e040047304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b001483045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c101475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
+               test_commitment!("304502210092a587aeb777f869e7ff0d7898ea619ee26a3dacd1f3672b945eea600be431100220077ee9eae3528d15251f2a52b607b189820e57a6ccfac8d1af502b132ee40169",
+                                "3045022100e5efb73c32d32da2d79702299b6317de6fb24a60476e3855926d78484dd1b3c802203557cb66a42c944ef06e00bcc4da35a5bcb2f185aab0f8e403e519e1d66aaf75",
+                                "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", {
 
-                                { 0,
-                                 "3045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb",
-                                 "304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a",
-                                 "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"},
+                                 { 0,
+                                 "304402206fa54c11f98c3bae1e93df43fc7affeb05b476bf8060c03e29c377c69bc08e8b0220672701cce50d5c379ff45a5d2cfe48ac44973adb066ac32608e21221d869bb89",
+                                 "304402206e36c683ebf2cb16bcef3d5439cf8b53cd97280a365ed8acd7abb85a8ba5f21c02206e8621edfc2a5766cbc96eb67fd501127ff163eb6b85518a39f7d4974aef126f",
+                                 "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" },
 
-                                { 1,
-                                 "3045022100ea9dc2a7c3c3640334dab733bb4e036e32a3106dc707b24227874fa4f7da746802204d672f7ac0fe765931a8df10b81e53a3242dd32bd9dc9331eb4a596da87954e9",
-                                 "30440220048a41c660c4841693de037d00a407810389f4574b3286afb7bc392a438fa3f802200401d71fa87c64fe621b49ac07e3bf85157ac680acb977124da28652cc7f1a5c",
-                                 "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"}
-               });
+                                 { 1,
+                                 "3044022057649739b0eb74d541ead0dfdb3d4b2c15aa192720031044c3434c67812e5ca902201e5ede42d960ae551707f4a6b34b09393cf4dee2418507daa022e3550dbb5817",
+                                 "304402207faad26678c8850e01b4a0696d60841f7305e1832b786110ee9075cb92ed14a30220516ef8ee5dfa80824ea28cbcec0dd95f8b847146257c16960db98507db15ffdc",
+                                 "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" }
+               } );
 
                // commitment tx with three outputs untrimmed (minimum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 3703;
 
-               test_commitment!("30450221008b7c191dd46893b67b628e618d2dc8e81169d38bade310181ab77d7c94c6675e02203b4dd131fd7c9deb299560983dcdc485545c98f989f7ae8180c28289f9e6bdb0",
-                                "3044022047305531dd44391dce03ae20f8735005c615eb077a974edb0059ea1a311857d602202e0ed6972fbdd1e8cb542b06e0929bc41b2ddf236e04cb75edd56151f4197506",
-                                "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", {
+               test_commitment!("3045022100b495d239772a237ff2cf354b1b11be152fd852704cb184e7356d13f2fb1e5e430220723db5cdb9cbd6ead7bfd3deb419cf41053a932418cbb22a67b581f40bc1f13e",
+                                "304402201b736d1773a124c745586217a75bed5f66c05716fbe8c7db4fdb3c3069741cdd02205083f39c321c1bcadfc8d97e3c791a66273d936abac0c6a2fde2ed46019508e1",
+                                "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", {
 
-                                { 0,
-                                 "3044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd",
-                                 "3045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724",
-                                 "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"}
-               });
+                                 { 0,
+                                 "3045022100c34c61735f93f2e324cc873c3b248111ccf8f6db15d5969583757010d4ad2b4602207867bb919b2ddd6387873e425345c9b7fd18d1d66aba41f3607bc2896ef3c30a",
+                                 "3045022100988c143e2110067117d2321bdd4bd16ca1734c98b29290d129384af0962b634e02206c1b02478878c5f547018b833986578f90c3e9be669fe5788ad0072a55acbb05",
+                                 "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" }
+               } );
 
                // commitment tx with three outputs untrimmed (maximum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 4914;
 
-               test_commitment!("304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e",
-                                "304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe26",
-                                "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", {
+               test_commitment!("3045022100b4b16d5f8cc9fc4c1aff48831e832a0d8990e133978a66e302c133550954a44d022073573ce127e2200d316f6b612803a5c0c97b8d20e1e44dbe2ac0dd2fb8c95244",
+                                "3045022100d72638bc6308b88bb6d45861aae83e5b9ff6e10986546e13bce769c70036e2620220320be7c6d66d22f30b9fcd52af66531505b1310ca3b848c19285b38d8a1a8c19",
+                                "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8003a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014cc1b07838e387deacd0e5232e1e8b49f4c29e484ae8f6a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0400483045022100d72638bc6308b88bb6d45861aae83e5b9ff6e10986546e13bce769c70036e2620220320be7c6d66d22f30b9fcd52af66531505b1310ca3b848c19285b38d8a1a8c1901483045022100b4b16d5f8cc9fc4c1aff48831e832a0d8990e133978a66e302c133550954a44d022073573ce127e2200d316f6b612803a5c0c97b8d20e1e44dbe2ac0dd2fb8c9524401475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {
 
-                                { 0,
-                                 "3045022100fcb38506bfa11c02874092a843d0cc0a8613c23b639832564a5f69020cb0f6ba02206508b9e91eaa001425c190c68ee5f887e1ad5b1b314002e74db9dbd9e42dbecf",
-                                 "304502210086e76b460ddd3cea10525fba298405d3fe11383e56966a5091811368362f689a02200f72ee75657915e0ede89c28709acd113ede9e1b7be520e3bc5cda425ecd6e68",
-                                 "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"}
-               });
+                                 { 0,
+                                 "3045022100f43591c156038ba217756006bb3c55f7d113a325cdd7d9303c82115372858d68022016355b5aadf222bc8d12e426c75f4a03423917b2443a103eb2a498a3a2234374",
+                                 "30440220585dee80fafa264beac535c3c0bb5838ac348b156fdc982f86adc08dfc9bfd250220130abb82f9f295cc9ef423dcfef772fde2acd85d9df48cc538981d26a10a9c10",
+                                 "02000000000101a9172908eace869cc35128c31fc2ab502f72e4dff31aab23e0244c4b04b11ab00000000000000000000122020000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500483045022100f43591c156038ba217756006bb3c55f7d113a325cdd7d9303c82115372858d68022016355b5aadf222bc8d12e426c75f4a03423917b2443a103eb2a498a3a2234374014730440220585dee80fafa264beac535c3c0bb5838ac348b156fdc982f86adc08dfc9bfd250220130abb82f9f295cc9ef423dcfef772fde2acd85d9df48cc538981d26a10a9c10012004040404040404040404040404040404040404040404040404040404040404048a76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a91418bc1a114ccf9c052d3d23e28d3b0a9d1227434288527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f801b175ac686800000000" }
+               } );
 
                // commitment tx with two outputs untrimmed (minimum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 4915;
 
-               test_commitment!("304402200769ba89c7330dfa4feba447b6e322305f12ac7dac70ec6ba997ed7c1b598d0802204fe8d337e7fee781f9b7b1a06e580b22f4f79d740059560191d7db53f8765552",
-                                "3045022100a012691ba6cea2f73fa8bac37750477e66363c6d28813b0bb6da77c8eb3fb0270220365e99c51304b0b1a6ab9ea1c8500db186693e39ec1ad5743ee231b0138384b9",
-                                "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", {});
+               test_commitment!("304402203a286936e74870ca1459c700c71202af0381910a6bfab687ef494ef1bc3e02c902202506c362d0e3bee15e802aa729bf378e051644648253513f1c085b264cc2a720",
+                                "30450221008a953551f4d67cb4df3037207fc082ddaf6be84d417b0bd14c80aab66f1b01a402207508796dc75034b2dee876fe01dc05a08b019f3e5d689ac8842ade2f1befccf5",
+                                "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", {});
 
                // commitment tx with two outputs untrimmed (maximum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 9651180;
 
-               test_commitment!("3044022037f83ff00c8e5fb18ae1f918ffc24e54581775a20ff1ae719297ef066c71caa9022039c529cccd89ff6c5ed1db799614533844bd6d101da503761c45c713996e3bbd",
-                                "30440220514f977bf7edc442de8ce43ace9686e5ebdc0f893033f13e40fb46c8b8c6e1f90220188006227d175f5c35da0b092c57bea82537aed89f7778204dc5bacf4f29f2b9",
-                                "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", {});
+               test_commitment!("304402200a8544eba1d216f5c5e530597665fa9bec56943c0f66d98fc3d028df52d84f7002201e45fa5c6bc3a506cc2553e7d1c0043a9811313fc39c954692c0d47cfce2bbd3",
+                                "3045022100e11b638c05c650c2f63a421d36ef8756c5ce82f2184278643520311cdf50aa200220259565fb9c8e4a87ccaf17f27a3b9ca4f20625754a0920d9c6c239d8156a11de",
+                                "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", {});
 
                // commitment tx with one output untrimmed (minimum feerate)
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 9651181;
 
-               test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
-                                "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
-                                "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", {});
+               test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
+                                "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
+                                "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", {});
 
                // commitment tx with fee greater than funder amount
                chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000
                chan.feerate_per_kw = 9651936;
 
-               test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e",
-                                "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1",
-                                "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8001c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de8431100400473044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b101473044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e01475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220", {});
+               test_commitment!("304402202ade0142008309eb376736575ad58d03e5b115499709c6db0b46e36ff394b492022037b63d78d66404d6504d4c4ac13be346f3d1802928a6d3ad95a6a944227161a2",
+                                "304402207e8d51e0c570a5868a78414f4e0cbfaed1106b171b9581542c30718ee4eb95ba02203af84194c97adf98898c9afe2f2ed4a7f8dba05a2dfab28ac9d9c604aa49a379",
+                                "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", {});
        }
 
        #[test]