Move the public channel state API into a new module
[rust-lightning] / lightning / src / ln / channelmanager.rs
index f2b3bf15d39608f93d08774c43306cc31f102ac5..1c883755f5a6a5ee77b3ef188925bb2bd18aebb7 100644 (file)
@@ -21,7 +21,7 @@ use bitcoin::blockdata::block::Header;
 use bitcoin::blockdata::transaction::Transaction;
 use bitcoin::blockdata::constants::ChainHash;
 use bitcoin::key::constants::SECRET_KEY_SIZE;
-use bitcoin::network::constants::Network;
+use bitcoin::network::Network;
 
 use bitcoin::hashes::Hash;
 use bitcoin::hashes::sha256::Hash as Sha256;
@@ -32,6 +32,7 @@ use bitcoin::secp256k1::Secp256k1;
 use bitcoin::{secp256k1, Sequence};
 
 use crate::blinded_path::{BlindedPath, NodeIdLookUp};
+use crate::blinded_path::message::ForwardNode;
 use crate::blinded_path::payment::{Bolt12OfferContext, Bolt12RefundContext, PaymentConstraints, PaymentContext, ReceiveTlvs};
 use crate::chain;
 use crate::chain::{Confirm, ChannelMonitorUpdateStatus, Watch, BestBlock};
@@ -45,7 +46,8 @@ use crate::events::{Event, EventHandler, EventsProvider, MessageSendEvent, Messa
 use crate::ln::inbound_payment;
 use crate::ln::types::{ChannelId, PaymentHash, PaymentPreimage, PaymentSecret};
 use crate::ln::channel::{self, Channel, ChannelPhase, ChannelContext, ChannelError, ChannelUpdateStatus, ShutdownResult, UnfundedChannelContext, UpdateFulfillCommitFetch, OutboundV1Channel, InboundV1Channel, WithChannelContext};
-pub use crate::ln::channel::{InboundHTLCDetails, InboundHTLCStateDetails, OutboundHTLCDetails, OutboundHTLCStateDetails};
+pub use crate::ln::channel_state::{ChannelCounterparty, ChannelDetails, ChannelShutdownState, CounterpartyForwardingInfo};
+pub use crate::ln::channel_state::{InboundHTLCDetails, InboundHTLCStateDetails, OutboundHTLCDetails, OutboundHTLCStateDetails};
 use crate::ln::features::{Bolt12InvoiceFeatures, ChannelFeatures, ChannelTypeFeatures, InitFeatures, NodeFeatures};
 #[cfg(any(feature = "_test_utils", test))]
 use crate::ln::features::Bolt11InvoiceFeatures;
@@ -680,6 +682,7 @@ struct ClaimingPayment {
        receiver_node_id: PublicKey,
        htlcs: Vec<events::ClaimedHTLC>,
        sender_intended_value: Option<u64>,
+       onion_fields: Option<RecipientOnionFields>,
 }
 impl_writeable_tlv_based!(ClaimingPayment, {
        (0, amount_msat, required),
@@ -687,6 +690,7 @@ impl_writeable_tlv_based!(ClaimingPayment, {
        (4, receiver_node_id, required),
        (5, htlcs, optional_vec),
        (7, sender_intended_value, option),
+       (9, onion_fields, option),
 });
 
 struct ClaimablePayment {
@@ -1167,7 +1171,7 @@ where
 ///
 /// ```
 /// use bitcoin::BlockHash;
-/// use bitcoin::network::constants::Network;
+/// use bitcoin::network::Network;
 /// use lightning::chain::BestBlock;
 /// # use lightning::chain::channelmonitor::ChannelMonitor;
 /// use lightning::ln::channelmanager::{ChainParameters, ChannelManager, ChannelManagerReadArgs};
@@ -2283,338 +2287,6 @@ const MAX_UNFUNDED_CHANNEL_PEERS: usize = 50;
 /// many peers we reject new (inbound) connections.
 const MAX_NO_CHANNEL_PEERS: usize = 250;
 
-/// Information needed for constructing an invoice route hint for this channel.
-#[derive(Clone, Debug, PartialEq)]
-pub struct CounterpartyForwardingInfo {
-       /// Base routing fee in millisatoshis.
-       pub fee_base_msat: u32,
-       /// Amount in millionths of a satoshi the channel will charge per transferred satoshi.
-       pub fee_proportional_millionths: u32,
-       /// The minimum difference in cltv_expiry between an ingoing HTLC and its outgoing counterpart,
-       /// such that the outgoing HTLC is forwardable to this counterparty. See `msgs::ChannelUpdate`'s
-       /// `cltv_expiry_delta` for more details.
-       pub cltv_expiry_delta: u16,
-}
-
-/// Channel parameters which apply to our counterparty. These are split out from [`ChannelDetails`]
-/// to better separate parameters.
-#[derive(Clone, Debug, PartialEq)]
-pub struct ChannelCounterparty {
-       /// The node_id of our counterparty
-       pub node_id: PublicKey,
-       /// The Features the channel counterparty provided upon last connection.
-       /// Useful for routing as it is the most up-to-date copy of the counterparty's features and
-       /// many routing-relevant features are present in the init context.
-       pub features: InitFeatures,
-       /// The value, in satoshis, that must always be held in the channel for our counterparty. This
-       /// value ensures that if our counterparty broadcasts a revoked state, we can punish them by
-       /// claiming at least this value on chain.
-       ///
-       /// This value is not included in [`inbound_capacity_msat`] as it can never be spent.
-       ///
-       /// [`inbound_capacity_msat`]: ChannelDetails::inbound_capacity_msat
-       pub unspendable_punishment_reserve: u64,
-       /// Information on the fees and requirements that the counterparty requires when forwarding
-       /// payments to us through this channel.
-       pub forwarding_info: Option<CounterpartyForwardingInfo>,
-       /// The smallest value HTLC (in msat) the remote peer will accept, for this channel. This field
-       /// is only `None` before we have received either the `OpenChannel` or `AcceptChannel` message
-       /// from the remote peer, or for `ChannelCounterparty` objects serialized prior to LDK 0.0.107.
-       pub outbound_htlc_minimum_msat: Option<u64>,
-       /// The largest value HTLC (in msat) the remote peer currently will accept, for this channel.
-       pub outbound_htlc_maximum_msat: Option<u64>,
-}
-
-/// Details of a channel, as returned by [`ChannelManager::list_channels`] and [`ChannelManager::list_usable_channels`]
-#[derive(Clone, Debug, PartialEq)]
-pub struct ChannelDetails {
-       /// The channel's ID (prior to funding transaction generation, this is a random 32 bytes,
-       /// thereafter this is the txid of the funding transaction xor the funding transaction output).
-       /// Note that this means this value is *not* persistent - it can change once during the
-       /// lifetime of the channel.
-       pub channel_id: ChannelId,
-       /// Parameters which apply to our counterparty. See individual fields for more information.
-       pub counterparty: ChannelCounterparty,
-       /// The Channel's funding transaction output, if we've negotiated the funding transaction with
-       /// our counterparty already.
-       pub funding_txo: Option<OutPoint>,
-       /// The features which this channel operates with. See individual features for more info.
-       ///
-       /// `None` until negotiation completes and the channel type is finalized.
-       pub channel_type: Option<ChannelTypeFeatures>,
-       /// The position of the funding transaction in the chain. None if the funding transaction has
-       /// not yet been confirmed and the channel fully opened.
-       ///
-       /// Note that if [`inbound_scid_alias`] is set, it must be used for invoices and inbound
-       /// payments instead of this. See [`get_inbound_payment_scid`].
-       ///
-       /// For channels with [`confirmations_required`] set to `Some(0)`, [`outbound_scid_alias`] may
-       /// be used in place of this in outbound routes. See [`get_outbound_payment_scid`].
-       ///
-       /// [`inbound_scid_alias`]: Self::inbound_scid_alias
-       /// [`outbound_scid_alias`]: Self::outbound_scid_alias
-       /// [`get_inbound_payment_scid`]: Self::get_inbound_payment_scid
-       /// [`get_outbound_payment_scid`]: Self::get_outbound_payment_scid
-       /// [`confirmations_required`]: Self::confirmations_required
-       pub short_channel_id: Option<u64>,
-       /// An optional [`short_channel_id`] alias for this channel, randomly generated by us and
-       /// usable in place of [`short_channel_id`] to reference the channel in outbound routes when
-       /// the channel has not yet been confirmed (as long as [`confirmations_required`] is
-       /// `Some(0)`).
-       ///
-       /// This will be `None` as long as the channel is not available for routing outbound payments.
-       ///
-       /// [`short_channel_id`]: Self::short_channel_id
-       /// [`confirmations_required`]: Self::confirmations_required
-       pub outbound_scid_alias: Option<u64>,
-       /// An optional [`short_channel_id`] alias for this channel, randomly generated by our
-       /// counterparty and usable in place of [`short_channel_id`] in invoice route hints. Our
-       /// counterparty will recognize the alias provided here in place of the [`short_channel_id`]
-       /// when they see a payment to be routed to us.
-       ///
-       /// Our counterparty may choose to rotate this value at any time, though will always recognize
-       /// previous values for inbound payment forwarding.
-       ///
-       /// [`short_channel_id`]: Self::short_channel_id
-       pub inbound_scid_alias: Option<u64>,
-       /// The value, in satoshis, of this channel as appears in the funding output
-       pub channel_value_satoshis: u64,
-       /// The value, in satoshis, that must always be held in the channel for us. This value ensures
-       /// that if we broadcast a revoked state, our counterparty can punish us by claiming at least
-       /// this value on chain.
-       ///
-       /// This value is not included in [`outbound_capacity_msat`] as it can never be spent.
-       ///
-       /// This value will be `None` for outbound channels until the counterparty accepts the channel.
-       ///
-       /// [`outbound_capacity_msat`]: ChannelDetails::outbound_capacity_msat
-       pub unspendable_punishment_reserve: Option<u64>,
-       /// The `user_channel_id` value passed in to [`ChannelManager::create_channel`] for outbound
-       /// channels, or to [`ChannelManager::accept_inbound_channel`] for inbound channels if
-       /// [`UserConfig::manually_accept_inbound_channels`] config flag is set to true. Otherwise
-       /// `user_channel_id` will be randomized for an inbound channel.  This may be zero for objects
-       /// serialized with LDK versions prior to 0.0.113.
-       ///
-       /// [`ChannelManager::create_channel`]: crate::ln::channelmanager::ChannelManager::create_channel
-       /// [`ChannelManager::accept_inbound_channel`]: crate::ln::channelmanager::ChannelManager::accept_inbound_channel
-       /// [`UserConfig::manually_accept_inbound_channels`]: crate::util::config::UserConfig::manually_accept_inbound_channels
-       pub user_channel_id: u128,
-       /// The currently negotiated fee rate denominated in satoshi per 1000 weight units,
-       /// which is applied to commitment and HTLC transactions.
-       ///
-       /// This value will be `None` for objects serialized with LDK versions prior to 0.0.115.
-       pub feerate_sat_per_1000_weight: Option<u32>,
-       /// Our total balance.  This is the amount we would get if we close the channel.
-       /// This value is not exact. Due to various in-flight changes and feerate changes, exactly this
-       /// amount is not likely to be recoverable on close.
-       ///
-       /// This does not include any pending HTLCs which are not yet fully resolved (and, thus, whose
-       /// balance is not available for inclusion in new outbound HTLCs). This further does not include
-       /// any pending outgoing HTLCs which are awaiting some other resolution to be sent.
-       /// This does not consider any on-chain fees.
-       ///
-       /// See also [`ChannelDetails::outbound_capacity_msat`]
-       pub balance_msat: u64,
-       /// The available outbound capacity for sending HTLCs to the remote peer. This does not include
-       /// any pending HTLCs which are not yet fully resolved (and, thus, whose balance is not
-       /// available for inclusion in new outbound HTLCs). This further does not include any pending
-       /// outgoing HTLCs which are awaiting some other resolution to be sent.
-       ///
-       /// See also [`ChannelDetails::balance_msat`]
-       ///
-       /// This value is not exact. Due to various in-flight changes, feerate changes, and our
-       /// conflict-avoidance policy, exactly this amount is not likely to be spendable. However, we
-       /// should be able to spend nearly this amount.
-       pub outbound_capacity_msat: u64,
-       /// The available outbound capacity for sending a single HTLC to the remote peer. This is
-       /// similar to [`ChannelDetails::outbound_capacity_msat`] but it may be further restricted by
-       /// the current state and per-HTLC limit(s). This is intended for use when routing, allowing us
-       /// to use a limit as close as possible to the HTLC limit we can currently send.
-       ///
-       /// See also [`ChannelDetails::next_outbound_htlc_minimum_msat`],
-       /// [`ChannelDetails::balance_msat`], and [`ChannelDetails::outbound_capacity_msat`].
-       pub next_outbound_htlc_limit_msat: u64,
-       /// The minimum value for sending a single HTLC to the remote peer. This is the equivalent of
-       /// [`ChannelDetails::next_outbound_htlc_limit_msat`] but represents a lower-bound, rather than
-       /// an upper-bound. This is intended for use when routing, allowing us to ensure we pick a
-       /// route which is valid.
-       pub next_outbound_htlc_minimum_msat: u64,
-       /// The available inbound capacity for the remote peer to send HTLCs to us. This does not
-       /// include any pending HTLCs which are not yet fully resolved (and, thus, whose balance is not
-       /// available for inclusion in new inbound HTLCs).
-       /// Note that there are some corner cases not fully handled here, so the actual available
-       /// inbound capacity may be slightly higher than this.
-       ///
-       /// This value is not exact. Due to various in-flight changes, feerate changes, and our
-       /// counterparty's conflict-avoidance policy, exactly this amount is not likely to be spendable.
-       /// However, our counterparty should be able to spend nearly this amount.
-       pub inbound_capacity_msat: u64,
-       /// The number of required confirmations on the funding transaction before the funding will be
-       /// considered "locked". This number is selected by the channel fundee (i.e. us if
-       /// [`is_outbound`] is *not* set), and can be selected for inbound channels with
-       /// [`ChannelHandshakeConfig::minimum_depth`] or limited for outbound channels with
-       /// [`ChannelHandshakeLimits::max_minimum_depth`].
-       ///
-       /// This value will be `None` for outbound channels until the counterparty accepts the channel.
-       ///
-       /// [`is_outbound`]: ChannelDetails::is_outbound
-       /// [`ChannelHandshakeConfig::minimum_depth`]: crate::util::config::ChannelHandshakeConfig::minimum_depth
-       /// [`ChannelHandshakeLimits::max_minimum_depth`]: crate::util::config::ChannelHandshakeLimits::max_minimum_depth
-       pub confirmations_required: Option<u32>,
-       /// The current number of confirmations on the funding transaction.
-       ///
-       /// This value will be `None` for objects serialized with LDK versions prior to 0.0.113.
-       pub confirmations: Option<u32>,
-       /// The number of blocks (after our commitment transaction confirms) that we will need to wait
-       /// until we can claim our funds after we force-close the channel. During this time our
-       /// counterparty is allowed to punish us if we broadcasted a stale state. If our counterparty
-       /// force-closes the channel and broadcasts a commitment transaction we do not have to wait any
-       /// time to claim our non-HTLC-encumbered funds.
-       ///
-       /// This value will be `None` for outbound channels until the counterparty accepts the channel.
-       pub force_close_spend_delay: Option<u16>,
-       /// True if the channel was initiated (and thus funded) by us.
-       pub is_outbound: bool,
-       /// True if the channel is confirmed, channel_ready messages have been exchanged, and the
-       /// channel is not currently being shut down. `channel_ready` message exchange implies the
-       /// required confirmation count has been reached (and we were connected to the peer at some
-       /// point after the funding transaction received enough confirmations). The required
-       /// confirmation count is provided in [`confirmations_required`].
-       ///
-       /// [`confirmations_required`]: ChannelDetails::confirmations_required
-       pub is_channel_ready: bool,
-       /// The stage of the channel's shutdown.
-       /// `None` for `ChannelDetails` serialized on LDK versions prior to 0.0.116.
-       pub channel_shutdown_state: Option<ChannelShutdownState>,
-       /// True if the channel is (a) confirmed and channel_ready messages have been exchanged, (b)
-       /// the peer is connected, and (c) the channel is not currently negotiating a shutdown.
-       ///
-       /// This is a strict superset of `is_channel_ready`.
-       pub is_usable: bool,
-       /// True if this channel is (or will be) publicly-announced.
-       pub is_public: bool,
-       /// The smallest value HTLC (in msat) we will accept, for this channel. This field
-       /// is only `None` for `ChannelDetails` objects serialized prior to LDK 0.0.107
-       pub inbound_htlc_minimum_msat: Option<u64>,
-       /// The largest value HTLC (in msat) we currently will accept, for this channel.
-       pub inbound_htlc_maximum_msat: Option<u64>,
-       /// Set of configurable parameters that affect channel operation.
-       ///
-       /// This field is only `None` for `ChannelDetails` objects serialized prior to LDK 0.0.109.
-       pub config: Option<ChannelConfig>,
-       /// Pending inbound HTLCs.
-       ///
-       /// This field is empty for objects serialized with LDK versions prior to 0.0.122.
-       pub pending_inbound_htlcs: Vec<InboundHTLCDetails>,
-       /// Pending outbound HTLCs.
-       ///
-       /// This field is empty for objects serialized with LDK versions prior to 0.0.122.
-       pub pending_outbound_htlcs: Vec<OutboundHTLCDetails>,
-}
-
-impl ChannelDetails {
-       /// Gets the current SCID which should be used to identify this channel for inbound payments.
-       /// This should be used for providing invoice hints or in any other context where our
-       /// counterparty will forward a payment to us.
-       ///
-       /// This is either the [`ChannelDetails::inbound_scid_alias`], if set, or the
-       /// [`ChannelDetails::short_channel_id`]. See those for more information.
-       pub fn get_inbound_payment_scid(&self) -> Option<u64> {
-               self.inbound_scid_alias.or(self.short_channel_id)
-       }
-
-       /// Gets the current SCID which should be used to identify this channel for outbound payments.
-       /// This should be used in [`Route`]s to describe the first hop or in other contexts where
-       /// we're sending or forwarding a payment outbound over this channel.
-       ///
-       /// This is either the [`ChannelDetails::short_channel_id`], if set, or the
-       /// [`ChannelDetails::outbound_scid_alias`]. See those for more information.
-       pub fn get_outbound_payment_scid(&self) -> Option<u64> {
-               self.short_channel_id.or(self.outbound_scid_alias)
-       }
-
-       fn from_channel_context<SP: Deref, F: Deref>(
-               context: &ChannelContext<SP>, best_block_height: u32, latest_features: InitFeatures,
-               fee_estimator: &LowerBoundedFeeEstimator<F>
-       ) -> Self
-       where
-               SP::Target: SignerProvider,
-               F::Target: FeeEstimator
-       {
-               let balance = context.get_available_balances(fee_estimator);
-               let (to_remote_reserve_satoshis, to_self_reserve_satoshis) =
-                       context.get_holder_counterparty_selected_channel_reserve_satoshis();
-               ChannelDetails {
-                       channel_id: context.channel_id(),
-                       counterparty: ChannelCounterparty {
-                               node_id: context.get_counterparty_node_id(),
-                               features: latest_features,
-                               unspendable_punishment_reserve: to_remote_reserve_satoshis,
-                               forwarding_info: context.counterparty_forwarding_info(),
-                               // Ensures that we have actually received the `htlc_minimum_msat` value
-                               // from the counterparty through the `OpenChannel` or `AcceptChannel`
-                               // message (as they are always the first message from the counterparty).
-                               // Else `Channel::get_counterparty_htlc_minimum_msat` could return the
-                               // default `0` value set by `Channel::new_outbound`.
-                               outbound_htlc_minimum_msat: if context.have_received_message() {
-                                       Some(context.get_counterparty_htlc_minimum_msat()) } else { None },
-                               outbound_htlc_maximum_msat: context.get_counterparty_htlc_maximum_msat(),
-                       },
-                       funding_txo: context.get_funding_txo(),
-                       // Note that accept_channel (or open_channel) is always the first message, so
-                       // `have_received_message` indicates that type negotiation has completed.
-                       channel_type: if context.have_received_message() { Some(context.get_channel_type().clone()) } else { None },
-                       short_channel_id: context.get_short_channel_id(),
-                       outbound_scid_alias: if context.is_usable() { Some(context.outbound_scid_alias()) } else { None },
-                       inbound_scid_alias: context.latest_inbound_scid_alias(),
-                       channel_value_satoshis: context.get_value_satoshis(),
-                       feerate_sat_per_1000_weight: Some(context.get_feerate_sat_per_1000_weight()),
-                       unspendable_punishment_reserve: to_self_reserve_satoshis,
-                       balance_msat: balance.balance_msat,
-                       inbound_capacity_msat: balance.inbound_capacity_msat,
-                       outbound_capacity_msat: balance.outbound_capacity_msat,
-                       next_outbound_htlc_limit_msat: balance.next_outbound_htlc_limit_msat,
-                       next_outbound_htlc_minimum_msat: balance.next_outbound_htlc_minimum_msat,
-                       user_channel_id: context.get_user_id(),
-                       confirmations_required: context.minimum_depth(),
-                       confirmations: Some(context.get_funding_tx_confirmations(best_block_height)),
-                       force_close_spend_delay: context.get_counterparty_selected_contest_delay(),
-                       is_outbound: context.is_outbound(),
-                       is_channel_ready: context.is_usable(),
-                       is_usable: context.is_live(),
-                       is_public: context.should_announce(),
-                       inbound_htlc_minimum_msat: Some(context.get_holder_htlc_minimum_msat()),
-                       inbound_htlc_maximum_msat: context.get_holder_htlc_maximum_msat(),
-                       config: Some(context.config()),
-                       channel_shutdown_state: Some(context.shutdown_state()),
-                       pending_inbound_htlcs: context.get_pending_inbound_htlc_details(),
-                       pending_outbound_htlcs: context.get_pending_outbound_htlc_details(),
-               }
-       }
-}
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-/// Further information on the details of the channel shutdown.
-/// Upon channels being forced closed (i.e. commitment transaction confirmation detected
-/// by `ChainMonitor`), ChannelShutdownState will be set to `ShutdownComplete` or
-/// the channel will be removed shortly.
-/// Also note, that in normal operation, peers could disconnect at any of these states
-/// and require peer re-connection before making progress onto other states
-pub enum ChannelShutdownState {
-       /// Channel has not sent or received a shutdown message.
-       NotShuttingDown,
-       /// Local node has sent a shutdown message for this channel.
-       ShutdownInitiated,
-       /// Shutdown message exchanges have concluded and the channels are in the midst of
-       /// resolving all existing open HTLCs before closing can continue.
-       ResolvingHTLCs,
-       /// All HTLCs have been resolved, nodes are currently negotiating channel close onchain fee rates.
-       NegotiatingClosingFee,
-       /// We've successfully negotiated a closing_signed dance. At this point `ChannelManager` is about
-       /// to drop the channel.
-       ShutdownComplete,
-}
-
 /// Used by [`ChannelManager::list_recent_payments`] to express the status of recent payments.
 /// These include payments that have yet to find a successful path, or have unresolved HTLCs.
 #[derive(Debug, PartialEq)]
@@ -4632,7 +4304,7 @@ where
                let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
                let mut result = Ok(());
 
-               if !funding_transaction.is_coin_base() {
+               if !funding_transaction.is_coinbase() {
                        for inp in funding_transaction.input.iter() {
                                if inp.witness.is_empty() {
                                        result = result.and(Err(APIError::APIMisuseError {
@@ -4688,9 +4360,9 @@ where
                                is_batch_funding,
                                |chan, tx| {
                                        let mut output_index = None;
-                                       let expected_spk = chan.context.get_funding_redeemscript().to_v0_p2wsh();
+                                       let expected_spk = chan.context.get_funding_redeemscript().to_p2wsh();
                                        for (idx, outp) in tx.output.iter().enumerate() {
-                                               if outp.script_pubkey == expected_spk && outp.value == chan.context.get_value_satoshis() {
+                                               if outp.script_pubkey == expected_spk && outp.value.to_sat() == chan.context.get_value_satoshis() {
                                                        if output_index.is_some() {
                                                                return Err("Multiple outputs matched the expected script and value");
                                                        }
@@ -6324,19 +5996,27 @@ where
                                        }
                                }
 
-                               let htlcs = payment.htlcs.iter().map(events::ClaimedHTLC::from).collect();
-                               let sender_intended_value = payment.htlcs.first().map(|htlc| htlc.total_msat);
-                               let dup_purpose = claimable_payments.pending_claiming_payments.insert(payment_hash,
-                                       ClaimingPayment { amount_msat: payment.htlcs.iter().map(|source| source.value).sum(),
-                                       payment_purpose: payment.purpose, receiver_node_id, htlcs, sender_intended_value
-                               });
-                               if dup_purpose.is_some() {
-                                       debug_assert!(false, "Shouldn't get a duplicate pending claim event ever");
-                                       log_error!(self.logger, "Got a duplicate pending claimable event on payment hash {}! Please report this bug",
-                                               &payment_hash);
-                               }
+                               let claiming_payment = claimable_payments.pending_claiming_payments
+                                       .entry(payment_hash)
+                                       .and_modify(|_| {
+                                               debug_assert!(false, "Shouldn't get a duplicate pending claim event ever");
+                                               log_error!(self.logger, "Got a duplicate pending claimable event on payment hash {}! Please report this bug",
+                                                       &payment_hash);
+                                       })
+                                       .or_insert_with(|| {
+                                               let htlcs = payment.htlcs.iter().map(events::ClaimedHTLC::from).collect();
+                                               let sender_intended_value = payment.htlcs.first().map(|htlc| htlc.total_msat);
+                                               ClaimingPayment {
+                                                       amount_msat: payment.htlcs.iter().map(|source| source.value).sum(),
+                                                       payment_purpose: payment.purpose,
+                                                       receiver_node_id,
+                                                       htlcs,
+                                                       sender_intended_value,
+                                                       onion_fields: payment.onion_fields,
+                                               }
+                                       });
 
-                               if let Some(RecipientOnionFields { ref custom_tlvs, .. }) = payment.onion_fields {
+                               if let Some(RecipientOnionFields { ref custom_tlvs, .. }) = claiming_payment.onion_fields {
                                        if !custom_tlvs_known && custom_tlvs.iter().any(|(typ, _)| typ % 2 == 0) {
                                                log_info!(self.logger, "Rejecting payment with payment hash {} as we cannot accept payment with unknown even TLVs: {}",
                                                        &payment_hash, log_iter!(custom_tlvs.iter().map(|(typ, _)| typ).filter(|typ| *typ % 2 == 0)));
@@ -6743,6 +6423,7 @@ where
                                                receiver_node_id,
                                                htlcs,
                                                sender_intended_value: sender_intended_total_msat,
+                                               onion_fields,
                                        }) = payment {
                                                self.pending_events.lock().unwrap().push_back((events::Event::PaymentClaimed {
                                                        payment_hash,
@@ -6751,6 +6432,7 @@ where
                                                        receiver_node_id: Some(receiver_node_id),
                                                        htlcs,
                                                        sender_intended_total_msat,
+                                                       onion_fields,
                                                }, None));
                                        }
                                },
@@ -7250,7 +6932,7 @@ where
                                        match phase.get_mut() {
                                                ChannelPhase::UnfundedOutboundV1(chan) => {
                                                        try_chan_phase_entry!(self, chan.accept_channel(&msg, &self.default_configuration.channel_handshake_limits, &peer_state.latest_features), phase);
-                                                       (chan.context.get_value_satoshis(), chan.context.get_funding_redeemscript().to_v0_p2wsh(), chan.context.get_user_id())
+                                                       (chan.context.get_value_satoshis(), chan.context.get_funding_redeemscript().to_p2wsh(), chan.context.get_user_id())
                                                },
                                                _ => {
                                                        return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Got an unexpected accept_channel message from peer with counterparty_node_id {}", counterparty_node_id), msg.common_fields.temporary_channel_id));
@@ -8996,8 +8678,16 @@ where
 
                let peers = self.per_peer_state.read().unwrap()
                        .iter()
-                       .filter(|(_, peer)| peer.lock().unwrap().latest_features.supports_onion_messages())
-                       .map(|(node_id, _)| *node_id)
+                       .map(|(node_id, peer_state)| (node_id, peer_state.lock().unwrap()))
+                       .filter(|(_, peer)| peer.latest_features.supports_onion_messages())
+                       .map(|(node_id, peer)| ForwardNode {
+                               node_id: *node_id,
+                               short_channel_id: peer.channel_by_id
+                                       .iter()
+                                       .filter(|(_, channel)| channel.context().is_usable())
+                                       .min_by_key(|(_, channel)| channel.context().channel_creation_height)
+                                       .and_then(|(_, channel)| channel.context().get_short_channel_id()),
+                       })
                        .collect::<Vec<_>>();
 
                self.router
@@ -9954,11 +9644,14 @@ where
                                                        }
                                                        &mut chan.context
                                                },
-                                               // We retain UnfundedOutboundV1 channel for some time in case
-                                               // peer unexpectedly disconnects, and intends to reconnect again.
-                                               ChannelPhase::UnfundedOutboundV1(_) => {
-                                                       return true;
-                                               },
+                                               // If we get disconnected and haven't yet committed to a funding
+                                               // transaction, we can replay the `open_channel` on reconnection, so don't
+                                               // bother dropping the channel here. However, if we already committed to
+                                               // the funding transaction we don't yet support replaying the funding
+                                               // handshake (and bailing if the peer rejects it), so we force-close in
+                                               // that case.
+                                               ChannelPhase::UnfundedOutboundV1(chan) if chan.is_resumable() => return true,
+                                               ChannelPhase::UnfundedOutboundV1(chan) => &mut chan.context,
                                                // Unfunded inbound channels will always be removed.
                                                ChannelPhase::UnfundedInboundV1(chan) => {
                                                        &mut chan.context
@@ -12261,6 +11954,7 @@ where
                                                amount_msat: claimable_amt_msat,
                                                htlcs: payment.htlcs.iter().map(events::ClaimedHTLC::from).collect(),
                                                sender_intended_total_msat: payment.htlcs.first().map(|htlc| htlc.total_msat),
+                                               onion_fields: payment.onion_fields,
                                        }, None));
                                }
                        }
@@ -13799,10 +13493,12 @@ pub mod bench {
        use crate::util::test_utils;
        use crate::util::config::{UserConfig, MaxDustHTLCExposure};
 
+       use bitcoin::amount::Amount;
        use bitcoin::blockdata::locktime::absolute::LockTime;
        use bitcoin::hashes::Hash;
        use bitcoin::hashes::sha256::Hash as Sha256;
        use bitcoin::{Transaction, TxOut};
+       use bitcoin::transaction::Version;
 
        use crate::sync::{Arc, Mutex, RwLock};
 
@@ -13879,8 +13575,8 @@ pub mod bench {
 
                let tx;
                if let Event::FundingGenerationReady { temporary_channel_id, output_script, .. } = get_event!(node_a_holder, Event::FundingGenerationReady) {
-                       tx = Transaction { version: 2, lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
-                               value: 8_000_000, script_pubkey: output_script,
+                       tx = Transaction { version: Version::TWO, lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
+                               value: Amount::from_sat(8_000_000), script_pubkey: output_script,
                        }]};
                        node_a.funding_transaction_generated(&temporary_channel_id, &node_b.get_our_node_id(), tx.clone()).unwrap();
                } else { panic!(); }