Merge pull request #2752 from valentinewallace/2023-11-large-final-onion-payload...
[rust-lightning] / lightning / src / routing / router.rs
index 8a7343916d34cacd166762716cdb5ad566ba21fc..9423078749d39175790a6f298831048db5482a63 100644 (file)
@@ -68,7 +68,7 @@ impl< G: Deref<Target = NetworkGraph<L>>, L: Deref, S: Deref, SP: Sized, Sc: Sco
        ) -> Result<Route, LightningError> {
                let random_seed_bytes = {
                        let mut locked_random_seed_bytes = self.random_seed_bytes.lock().unwrap();
-                       *locked_random_seed_bytes = Sha256::hash(&*locked_random_seed_bytes).into_inner();
+                       *locked_random_seed_bytes = Sha256::hash(&*locked_random_seed_bytes).to_byte_array();
                        *locked_random_seed_bytes
                };
                find_route(
@@ -90,6 +90,7 @@ pub trait Router {
                &self, payer: &PublicKey, route_params: &RouteParameters,
                first_hops: Option<&[&ChannelDetails]>, inflight_htlcs: InFlightHtlcs
        ) -> Result<Route, LightningError>;
+
        /// Finds a [`Route`] for a payment between the given `payer` and a payee.
        ///
        /// The `payee` and the payment's value are given in [`RouteParameters::payment_params`]
@@ -112,12 +113,12 @@ pub trait Router {
 /// [`find_route`].
 ///
 /// [`ScoreLookUp`]: crate::routing::scoring::ScoreLookUp
-pub struct ScorerAccountingForInFlightHtlcs<'a, SP: Sized, Sc: 'a + ScoreLookUp<ScoreParams = SP>, S: Deref<Target = Sc>> {
+pub struct ScorerAccountingForInFlightHtlcs<'a, S: Deref> where S::Target: ScoreLookUp {
        scorer: S,
        // Maps a channel's short channel id and its direction to the liquidity used up.
        inflight_htlcs: &'a InFlightHtlcs,
 }
-impl<'a, SP: Sized, Sc: ScoreLookUp<ScoreParams = SP>, S: Deref<Target = Sc>> ScorerAccountingForInFlightHtlcs<'a, SP, Sc, S> {
+impl<'a, S: Deref> ScorerAccountingForInFlightHtlcs<'a, S> where S::Target: ScoreLookUp {
        /// Initialize a new `ScorerAccountingForInFlightHtlcs`.
        pub fn new(scorer: S, inflight_htlcs: &'a InFlightHtlcs) -> Self {
                ScorerAccountingForInFlightHtlcs {
@@ -127,25 +128,29 @@ impl<'a, SP: Sized, Sc: ScoreLookUp<ScoreParams = SP>, S: Deref<Target = Sc>> Sc
        }
 }
 
-#[cfg(c_bindings)]
-impl<'a, SP: Sized, Sc: ScoreLookUp<ScoreParams = SP>, S: Deref<Target = Sc>> Writeable for ScorerAccountingForInFlightHtlcs<'a, SP, Sc, S> {
-       fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> { self.scorer.write(writer) }
-}
-
-impl<'a, SP: Sized, Sc: 'a + ScoreLookUp<ScoreParams = SP>, S: Deref<Target = Sc>> ScoreLookUp for ScorerAccountingForInFlightHtlcs<'a, SP, Sc, S> {
-       type ScoreParams = Sc::ScoreParams;
-       fn channel_penalty_msat(&self, short_channel_id: u64, source: &NodeId, target: &NodeId, usage: ChannelUsage, score_params: &Self::ScoreParams) -> u64 {
+impl<'a, S: Deref> ScoreLookUp for ScorerAccountingForInFlightHtlcs<'a, S> where S::Target: ScoreLookUp {
+       type ScoreParams = <S::Target as ScoreLookUp>::ScoreParams;
+       fn channel_penalty_msat(&self, candidate: &CandidateRouteHop, usage: ChannelUsage, score_params: &Self::ScoreParams) -> u64 {
+               let target = match candidate.target() {
+                       Some(target) => target,
+                       None => return self.scorer.channel_penalty_msat(candidate, usage, score_params),
+               };
+               let short_channel_id = match candidate.short_channel_id() {
+                       Some(short_channel_id) => short_channel_id,
+                       None => return self.scorer.channel_penalty_msat(candidate, usage, score_params),
+               };
+               let source = candidate.source();
                if let Some(used_liquidity) = self.inflight_htlcs.used_liquidity_msat(
-                       source, target, short_channel_id
+                       &source, &target, short_channel_id
                ) {
                        let usage = ChannelUsage {
                                inflight_htlc_msat: usage.inflight_htlc_msat.saturating_add(used_liquidity),
                                ..usage
                        };
 
-                       self.scorer.channel_penalty_msat(short_channel_id, source, target, usage, score_params)
+                       self.scorer.channel_penalty_msat(candidate, usage, score_params)
                } else {
-                       self.scorer.channel_penalty_msat(short_channel_id, source, target, usage, score_params)
+                       self.scorer.channel_penalty_msat(candidate, usage, score_params)
                }
        }
 }
@@ -933,6 +938,10 @@ impl Readable for RouteHint {
 }
 
 /// A channel descriptor for a hop along a payment path.
+///
+/// While this generally comes from BOLT 11's `r` field, this struct includes more fields than are
+/// available in BOLT 11. Thus, encoding and decoding this via `lightning-invoice` is lossy, as
+/// fields not supported in BOLT 11 will be stripped.
 #[derive(Clone, Debug, Hash, Eq, PartialEq, Ord, PartialOrd)]
 pub struct RouteHintHop {
        /// The node_id of the non-target end of the route
@@ -959,33 +968,24 @@ impl_writeable_tlv_based!(RouteHintHop, {
 });
 
 #[derive(Eq, PartialEq)]
+#[repr(align(64))] // Force the size to 64 bytes
 struct RouteGraphNode {
        node_id: NodeId,
-       lowest_fee_to_node: u64,
-       total_cltv_delta: u32,
+       score: u64,
        // The maximum value a yet-to-be-constructed payment path might flow through this node.
        // This value is upper-bounded by us by:
        // - how much is needed for a path being constructed
        // - how much value can channels following this node (up to the destination) can contribute,
        //   considering their capacity and fees
        value_contribution_msat: u64,
-       /// The effective htlc_minimum_msat at this hop. If a later hop on the path had a higher HTLC
-       /// minimum, we use it, plus the fees required at each earlier hop to meet it.
-       path_htlc_minimum_msat: u64,
-       /// All penalties incurred from this hop on the way to the destination, as calculated using
-       /// channel scoring.
-       path_penalty_msat: u64,
+       total_cltv_delta: u32,
        /// The number of hops walked up to this node.
        path_length_to_node: u8,
 }
 
 impl cmp::Ord for RouteGraphNode {
        fn cmp(&self, other: &RouteGraphNode) -> cmp::Ordering {
-               let other_score = cmp::max(other.lowest_fee_to_node, other.path_htlc_minimum_msat)
-                       .saturating_add(other.path_penalty_msat);
-               let self_score = cmp::max(self.lowest_fee_to_node, self.path_htlc_minimum_msat)
-                       .saturating_add(self.path_penalty_msat);
-               other_score.cmp(&self_score).then_with(|| other.node_id.cmp(&self.node_id))
+               other.score.cmp(&self.score).then_with(|| other.node_id.cmp(&self.node_id))
        }
 }
 
@@ -995,46 +995,134 @@ impl cmp::PartialOrd for RouteGraphNode {
        }
 }
 
+// While RouteGraphNode can be laid out with fewer bytes, performance appears to be improved
+// substantially when it is laid out at exactly 64 bytes.
+//
+// Thus, we use `#[repr(C)]` on the struct to force a suboptimal layout and check that it stays 64
+// bytes here.
+#[cfg(any(ldk_bench, not(any(test, fuzzing))))]
+const _GRAPH_NODE_SMALL: usize = 64 - core::mem::size_of::<RouteGraphNode>();
+#[cfg(any(ldk_bench, not(any(test, fuzzing))))]
+const _GRAPH_NODE_FIXED_SIZE: usize = core::mem::size_of::<RouteGraphNode>() - 64;
+
 /// A wrapper around the various hop representations.
 ///
-/// Used to construct a [`PathBuildingHop`] and to estimate [`EffectiveCapacity`].
+/// Can be used to examine the properties of a hop,
+/// potentially to decide whether to include it in a route.
 #[derive(Clone, Debug)]
-enum CandidateRouteHop<'a> {
+pub enum CandidateRouteHop<'a> {
        /// A hop from the payer, where the outbound liquidity is known.
        FirstHop {
+               /// Channel details of the first hop
+               ///
+               /// [`ChannelDetails::get_outbound_payment_scid`] MUST be `Some` (indicating the channel
+               /// has been funded and is able to pay), and accessor methods may panic otherwise.
+               ///
+               /// [`find_route`] validates this prior to constructing a [`CandidateRouteHop`].
                details: &'a ChannelDetails,
+               /// The node id of the payer, which is also the source side of this candidate route hop.
+               payer_node_id: &'a NodeId,
        },
-       /// A hop found in the [`ReadOnlyNetworkGraph`], where the channel capacity may be unknown.
+       /// A hop found in the [`ReadOnlyNetworkGraph`].
        PublicHop {
+               /// Information about the channel, including potentially its capacity and
+               /// direction-specific information.
                info: DirectedChannelInfo<'a>,
+               /// The short channel ID of the channel, i.e. the identifier by which we refer to this
+               /// channel.
                short_channel_id: u64,
        },
-       /// A hop to the payee found in the BOLT 11 payment invoice, though not necessarily a direct
-       /// channel.
+       /// A private hop communicated by the payee, generally via a BOLT 11 invoice.
+       ///
+       /// Because BOLT 11 route hints can take multiple hops to get to the destination, this may not
+       /// terminate at the payee.
        PrivateHop {
+               /// Information about the private hop communicated via BOLT 11.
                hint: &'a RouteHintHop,
+               /// Node id of the next hop in BOLT 11 route hint.
+               target_node_id: &'a NodeId
        },
-       /// The payee's identity is concealed behind blinded paths provided in a BOLT 12 invoice.
+       /// A blinded path which starts with an introduction point and ultimately terminates with the
+       /// payee.
+       ///
+       /// Because we don't know the payee's identity, [`CandidateRouteHop::target`] will return
+       /// `None` in this state.
+       ///
+       /// Because blinded paths are "all or nothing", and we cannot use just one part of a blinded
+       /// path, the full path is treated as a single [`CandidateRouteHop`].
        Blinded {
+               /// Information about the blinded path including the fee, HTLC amount limits, and
+               /// cryptographic material required to build an HTLC through the given path.
                hint: &'a (BlindedPayInfo, BlindedPath),
+               /// Index of the hint in the original list of blinded hints.
+               ///
+               /// This is used to cheaply uniquely identify this blinded path, even though we don't have
+               /// a short channel ID for this hop.
                hint_idx: usize,
        },
-       /// Similar to [`Self::Blinded`], but the path here has 1 blinded hop. `BlindedPayInfo` provided
-       /// for 1-hop blinded paths is ignored because it is meant to apply to the hops *between* the
-       /// introduction node and the destination. Useful for tracking that we need to include a blinded
-       /// path at the end of our [`Route`].
+       /// Similar to [`Self::Blinded`], but the path here only has one hop.
+       ///
+       /// While we treat this similarly to [`CandidateRouteHop::Blinded`] in many respects (e.g.
+       /// returning `None` from [`CandidateRouteHop::target`]), in this case we do actually know the
+       /// payee's identity - it's the introduction point!
+       ///
+       /// [`BlindedPayInfo`] provided for 1-hop blinded paths is ignored because it is meant to apply
+       /// to the hops *between* the introduction node and the destination.
+       ///
+       /// This primarily exists to track that we need to included a blinded path at the end of our
+       /// [`Route`], even though it doesn't actually add an additional hop in the payment.
        OneHopBlinded {
+               /// Information about the blinded path including the fee, HTLC amount limits, and
+               /// cryptographic material required to build an HTLC terminating with the given path.
+               ///
+               /// Note that the [`BlindedPayInfo`] is ignored here.
                hint: &'a (BlindedPayInfo, BlindedPath),
+               /// Index of the hint in the original list of blinded hints.
+               ///
+               /// This is used to cheaply uniquely identify this blinded path, even though we don't have
+               /// a short channel ID for this hop.
                hint_idx: usize,
        },
 }
 
 impl<'a> CandidateRouteHop<'a> {
+       /// Returns the short channel ID for this hop, if one is known.
+       ///
+       /// This SCID could be an alias or a globally unique SCID, and thus is only expected to
+       /// uniquely identify this channel in conjunction with the [`CandidateRouteHop::source`].
+       ///
+       /// Returns `Some` as long as the candidate is a [`CandidateRouteHop::PublicHop`], a
+       /// [`CandidateRouteHop::PrivateHop`] from a BOLT 11 route hint, or a
+       /// [`CandidateRouteHop::FirstHop`] with a known [`ChannelDetails::get_outbound_payment_scid`]
+       /// (which is always true for channels which are funded and ready for use).
+       ///
+       /// In other words, this should always return `Some` as long as the candidate hop is not a
+       /// [`CandidateRouteHop::Blinded`] or a [`CandidateRouteHop::OneHopBlinded`].
+       ///
+       /// Note that this is deliberately not public as it is somewhat of a footgun because it doesn't
+       /// define a global namespace.
+       #[inline]
        fn short_channel_id(&self) -> Option<u64> {
                match self {
-                       CandidateRouteHop::FirstHop { details } => Some(details.get_outbound_payment_scid().unwrap()),
+                       CandidateRouteHop::FirstHop { details, .. } => details.get_outbound_payment_scid(),
+                       CandidateRouteHop::PublicHop { short_channel_id, .. } => Some(*short_channel_id),
+                       CandidateRouteHop::PrivateHop { hint, .. } => Some(hint.short_channel_id),
+                       CandidateRouteHop::Blinded { .. } => None,
+                       CandidateRouteHop::OneHopBlinded { .. } => None,
+               }
+       }
+
+       /// Returns the globally unique short channel ID for this hop, if one is known.
+       ///
+       /// This only returns `Some` if the channel is public (either our own, or one we've learned
+       /// from the public network graph), and thus the short channel ID we have for this channel is
+       /// globally unique and identifies this channel in a global namespace.
+       #[inline]
+       pub fn globally_unique_short_channel_id(&self) -> Option<u64> {
+               match self {
+                       CandidateRouteHop::FirstHop { details, .. } => if details.is_public { details.short_channel_id } else { None },
                        CandidateRouteHop::PublicHop { short_channel_id, .. } => Some(*short_channel_id),
-                       CandidateRouteHop::PrivateHop { hint } => Some(hint.short_channel_id),
+                       CandidateRouteHop::PrivateHop { .. } => None,
                        CandidateRouteHop::Blinded { .. } => None,
                        CandidateRouteHop::OneHopBlinded { .. } => None,
                }
@@ -1043,7 +1131,7 @@ impl<'a> CandidateRouteHop<'a> {
        // NOTE: This may alloc memory so avoid calling it in a hot code path.
        fn features(&self) -> ChannelFeatures {
                match self {
-                       CandidateRouteHop::FirstHop { details } => details.counterparty.features.to_context(),
+                       CandidateRouteHop::FirstHop { details, .. } => details.counterparty.features.to_context(),
                        CandidateRouteHop::PublicHop { info, .. } => info.channel().features.clone(),
                        CandidateRouteHop::PrivateHop { .. } => ChannelFeatures::empty(),
                        CandidateRouteHop::Blinded { .. } => ChannelFeatures::empty(),
@@ -1051,33 +1139,43 @@ impl<'a> CandidateRouteHop<'a> {
                }
        }
 
-       fn cltv_expiry_delta(&self) -> u32 {
+       /// Returns the required difference in HTLC CLTV expiry between the [`Self::source`] and the
+       /// next-hop for an HTLC taking this hop.
+       ///
+       /// This is the time that the node(s) in this hop have to claim the HTLC on-chain if the
+       /// next-hop goes on chain with a payment preimage.
+       #[inline]
+       pub fn cltv_expiry_delta(&self) -> u32 {
                match self {
                        CandidateRouteHop::FirstHop { .. } => 0,
                        CandidateRouteHop::PublicHop { info, .. } => info.direction().cltv_expiry_delta as u32,
-                       CandidateRouteHop::PrivateHop { hint } => hint.cltv_expiry_delta as u32,
+                       CandidateRouteHop::PrivateHop { hint, .. } => hint.cltv_expiry_delta as u32,
                        CandidateRouteHop::Blinded { hint, .. } => hint.0.cltv_expiry_delta as u32,
                        CandidateRouteHop::OneHopBlinded { .. } => 0,
                }
        }
 
-       fn htlc_minimum_msat(&self) -> u64 {
+       /// Returns the minimum amount that can be sent over this hop, in millisatoshis.
+       #[inline]
+       pub fn htlc_minimum_msat(&self) -> u64 {
                match self {
-                       CandidateRouteHop::FirstHop { details } => details.next_outbound_htlc_minimum_msat,
+                       CandidateRouteHop::FirstHop { details, .. } => details.next_outbound_htlc_minimum_msat,
                        CandidateRouteHop::PublicHop { info, .. } => info.direction().htlc_minimum_msat,
-                       CandidateRouteHop::PrivateHop { hint } => hint.htlc_minimum_msat.unwrap_or(0),
+                       CandidateRouteHop::PrivateHop { hint, .. } => hint.htlc_minimum_msat.unwrap_or(0),
                        CandidateRouteHop::Blinded { hint, .. } => hint.0.htlc_minimum_msat,
                        CandidateRouteHop::OneHopBlinded { .. } => 0,
                }
        }
 
-       fn fees(&self) -> RoutingFees {
+       /// Returns the fees that must be paid to route an HTLC over this channel.
+       #[inline]
+       pub fn fees(&self) -> RoutingFees {
                match self {
                        CandidateRouteHop::FirstHop { .. } => RoutingFees {
                                base_msat: 0, proportional_millionths: 0,
                        },
                        CandidateRouteHop::PublicHop { info, .. } => info.direction().fees,
-                       CandidateRouteHop::PrivateHop { hint } => hint.fees,
+                       CandidateRouteHop::PrivateHop { hint, .. } => hint.fees,
                        CandidateRouteHop::Blinded { hint, .. } => {
                                RoutingFees {
                                        base_msat: hint.0.fee_base_msat,
@@ -1089,15 +1187,19 @@ impl<'a> CandidateRouteHop<'a> {
                }
        }
 
+       /// Fetch the effective capacity of this hop.
+       ///
+       /// Note that this may be somewhat expensive, so calls to this should be limited and results
+       /// cached!
        fn effective_capacity(&self) -> EffectiveCapacity {
                match self {
-                       CandidateRouteHop::FirstHop { details } => EffectiveCapacity::ExactLiquidity {
+                       CandidateRouteHop::FirstHop { details, .. } => EffectiveCapacity::ExactLiquidity {
                                liquidity_msat: details.next_outbound_htlc_limit_msat,
                        },
                        CandidateRouteHop::PublicHop { info, .. } => info.effective_capacity(),
-                       CandidateRouteHop::PrivateHop { hint: RouteHintHop { htlc_maximum_msat: Some(max), .. }} =>
+                       CandidateRouteHop::PrivateHop { hint: RouteHintHop { htlc_maximum_msat: Some(max), .. }, .. } =>
                                EffectiveCapacity::HintMaxHTLC { amount_msat: *max },
-                       CandidateRouteHop::PrivateHop { hint: RouteHintHop { htlc_maximum_msat: None, .. }} =>
+                       CandidateRouteHop::PrivateHop { hint: RouteHintHop { htlc_maximum_msat: None, .. }, .. } =>
                                EffectiveCapacity::Infinite,
                        CandidateRouteHop::Blinded { hint, .. } =>
                                EffectiveCapacity::HintMaxHTLC { amount_msat: hint.0.htlc_maximum_msat },
@@ -1105,11 +1207,15 @@ impl<'a> CandidateRouteHop<'a> {
                }
        }
 
-       fn id(&self, channel_direction: bool /* src_node_id < target_node_id */) -> CandidateHopId {
+       /// Returns an ID describing the given hop.
+       ///
+       /// See the docs on [`CandidateHopId`] for when this is, or is not, unique.
+       #[inline]
+       fn id(&self) -> CandidateHopId {
                match self {
                        CandidateRouteHop::Blinded { hint_idx, .. } => CandidateHopId::Blinded(*hint_idx),
                        CandidateRouteHop::OneHopBlinded { hint_idx, .. } => CandidateHopId::Blinded(*hint_idx),
-                       _ => CandidateHopId::Clear((self.short_channel_id().unwrap(), channel_direction)),
+                       _ => CandidateHopId::Clear((self.short_channel_id().unwrap(), self.source() < self.target().unwrap())),
                }
        }
        fn blinded_path(&self) -> Option<&'a BlindedPath> {
@@ -1120,8 +1226,51 @@ impl<'a> CandidateRouteHop<'a> {
                        _ => None,
                }
        }
+       /// Returns the source node id of current hop.
+       ///
+       /// Source node id refers to the node forwarding the HTLC through this hop.
+       ///
+       /// For [`Self::FirstHop`] we return payer's node id.
+       #[inline]
+       pub fn source(&self) -> NodeId {
+               match self {
+                       CandidateRouteHop::FirstHop { payer_node_id, .. } => **payer_node_id,
+                       CandidateRouteHop::PublicHop { info, .. } => *info.source(),
+                       CandidateRouteHop::PrivateHop { hint, .. } => hint.src_node_id.into(),
+                       CandidateRouteHop::Blinded { hint, .. } => hint.1.introduction_node_id.into(),
+                       CandidateRouteHop::OneHopBlinded { hint, .. } => hint.1.introduction_node_id.into(),
+               }
+       }
+       /// Returns the target node id of this hop, if known.
+       ///
+       /// Target node id refers to the node receiving the HTLC after this hop.
+       ///
+       /// For [`Self::Blinded`] we return `None` because the ultimate destination after the blinded
+       /// path is unknown.
+       ///
+       /// For [`Self::OneHopBlinded`] we return `None` because the target is the same as the source,
+       /// and such a return value would be somewhat nonsensical.
+       #[inline]
+       pub fn target(&self) -> Option<NodeId> {
+               match self {
+                       CandidateRouteHop::FirstHop { details, .. } => Some(details.counterparty.node_id.into()),
+                       CandidateRouteHop::PublicHop { info, .. } => Some(*info.target()),
+                       CandidateRouteHop::PrivateHop { target_node_id, .. } => Some(**target_node_id),
+                       CandidateRouteHop::Blinded { .. } => None,
+                       CandidateRouteHop::OneHopBlinded { .. } => None,
+               }
+       }
 }
 
+/// A unique(ish) identifier for a specific [`CandidateRouteHop`].
+///
+/// For blinded paths, this ID is unique only within a given [`find_route`] call.
+///
+/// For other hops, because SCIDs between private channels and public channels can conflict, this
+/// isn't guaranteed to be unique at all.
+///
+/// For our uses, this is generally fine, but it is not public as it is otherwise a rather
+/// difficult-to-use API.
 #[derive(Clone, Copy, Eq, Hash, Ord, PartialOrd, PartialEq)]
 enum CandidateHopId {
        /// Contains (scid, src_node_id < target_node_id)
@@ -1163,18 +1312,15 @@ fn iter_equal<I1: Iterator, I2: Iterator>(mut iter_a: I1, mut iter_b: I2)
 /// Fee values should be updated only in the context of the whole path, see update_value_and_recompute_fees.
 /// These fee values are useful to choose hops as we traverse the graph "payee-to-payer".
 #[derive(Clone)]
+#[repr(C)] // Force fields to appear in the order we define them.
 struct PathBuildingHop<'a> {
-       // Note that this should be dropped in favor of loading it from CandidateRouteHop, but doing so
-       // is a larger refactor and will require careful performance analysis.
-       node_id: NodeId,
        candidate: CandidateRouteHop<'a>,
-       fee_msat: u64,
-
-       /// All the fees paid *after* this channel on the way to the destination
-       next_hops_fee_msat: u64,
-       /// Fee paid for the use of the current channel (see candidate.fees()).
-       /// The value will be actually deducted from the counterparty balance on the previous link.
-       hop_use_fee_msat: u64,
+       /// If we've already processed a node as the best node, we shouldn't process it again. Normally
+       /// we'd just ignore it if we did as all channels would have a higher new fee, but because we
+       /// may decrease the amounts in use as we walk the graph, the actual calculated fee may
+       /// decrease as well. Thus, we have to explicitly track which nodes have been processed and
+       /// avoid processing them again.
+       was_processed: bool,
        /// Used to compare channels when choosing the for routing.
        /// Includes paying for the use of a hop and the following hops, as well as
        /// an estimated cost of reaching this hop.
@@ -1186,12 +1332,20 @@ struct PathBuildingHop<'a> {
        /// All penalties incurred from this channel on the way to the destination, as calculated using
        /// channel scoring.
        path_penalty_msat: u64,
-       /// If we've already processed a node as the best node, we shouldn't process it again. Normally
-       /// we'd just ignore it if we did as all channels would have a higher new fee, but because we
-       /// may decrease the amounts in use as we walk the graph, the actual calculated fee may
-       /// decrease as well. Thus, we have to explicitly track which nodes have been processed and
-       /// avoid processing them again.
-       was_processed: bool,
+
+       // The last 16 bytes are on the next cache line by default in glibc's malloc. Thus, we should
+       // only place fields which are not hot there. Luckily, the next three fields are only read if
+       // we end up on the selected path, and only in the final path layout phase, so we don't care
+       // too much if reading them is slow.
+
+       fee_msat: u64,
+
+       /// All the fees paid *after* this channel on the way to the destination
+       next_hops_fee_msat: u64,
+       /// Fee paid for the use of the current channel (see candidate.fees()).
+       /// The value will be actually deducted from the counterparty balance on the previous link.
+       hop_use_fee_msat: u64,
+
        #[cfg(all(not(ldk_bench), any(test, fuzzing)))]
        // In tests, we apply further sanity checks on cases where we skip nodes we already processed
        // to ensure it is specifically in cases where the fee has gone down because of a decrease in
@@ -1200,11 +1354,23 @@ struct PathBuildingHop<'a> {
        value_contribution_msat: u64,
 }
 
+// Checks that the entries in the `find_route` `dist` map fit in (exactly) two standard x86-64
+// cache lines. Sadly, they're not guaranteed to actually lie on a cache line (and in fact,
+// generally won't, because at least glibc's malloc will align to a nice, big, round
+// boundary...plus 16), but at least it will reduce the amount of data we'll need to load.
+//
+// Note that these assertions only pass on somewhat recent rustc, and thus are gated on the
+// ldk_bench flag.
+#[cfg(ldk_bench)]
+const _NODE_MAP_SIZE_TWO_CACHE_LINES: usize = 128 - core::mem::size_of::<(NodeId, PathBuildingHop)>();
+#[cfg(ldk_bench)]
+const _NODE_MAP_SIZE_EXACTLY_CACHE_LINES: usize = core::mem::size_of::<(NodeId, PathBuildingHop)>() - 128;
+
 impl<'a> core::fmt::Debug for PathBuildingHop<'a> {
        fn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {
                let mut debug_struct = f.debug_struct("PathBuildingHop");
                debug_struct
-                       .field("node_id", &self.node_id)
+                       .field("node_id", &self.candidate.target())
                        .field("short_channel_id", &self.candidate.short_channel_id())
                        .field("total_fee_msat", &self.total_fee_msat)
                        .field("next_hops_fee_msat", &self.next_hops_fee_msat)
@@ -1654,6 +1820,20 @@ where L::Target: Logger {
                }
        }
 
+       let mut private_hop_key_cache = HashMap::with_capacity(
+               payment_params.payee.unblinded_route_hints().iter().map(|path| path.0.len()).sum()
+       );
+
+       // Because we store references to private hop node_ids in `dist`, below, we need them to exist
+       // (as `NodeId`, not `PublicKey`) for the lifetime of `dist`. Thus, we calculate all the keys
+       // we'll need here and simply fetch them when routing.
+       private_hop_key_cache.insert(maybe_dummy_payee_pk, NodeId::from_pubkey(&maybe_dummy_payee_pk));
+       for route in payment_params.payee.unblinded_route_hints().iter() {
+               for hop in route.0.iter() {
+                       private_hop_key_cache.insert(hop.src_node_id, NodeId::from_pubkey(&hop.src_node_id));
+               }
+       }
+
        // The main heap containing all candidate next-hops sorted by their score (max(fee,
        // htlc_minimum)). Ideally this would be a heap which allowed cheap score reduction instead of
        // adding duplicate entries when we find a better path to a given node.
@@ -1726,11 +1906,11 @@ where L::Target: Logger {
        let mut num_ignored_htlc_minimum_msat_limit: u32 = 0;
 
        macro_rules! add_entry {
-               // Adds entry which goes from $src_node_id to $dest_node_id over the $candidate hop.
+               // Adds entry which goes from $candidate.source() to $candidate.target() over the $candidate hop.
                // $next_hops_fee_msat represents the fees paid for using all the channels *after* this one,
                // since that value has to be transferred over this channel.
                // Returns the contribution amount of $candidate if the channel caused an update to `targets`.
-               ( $candidate: expr, $src_node_id: expr, $dest_node_id: expr, $next_hops_fee_msat: expr,
+               ( $candidate: expr, $next_hops_fee_msat: expr,
                        $next_hops_value_contribution: expr, $next_hops_path_htlc_minimum_msat: expr,
                        $next_hops_path_penalty_msat: expr, $next_hops_cltv_delta: expr, $next_hops_path_length: expr ) => { {
                        // We "return" whether we updated the path at the end, and how much we can route via
@@ -1740,7 +1920,8 @@ where L::Target: Logger {
                        // practice these cases should be caught earlier:
                        // - for regular channels at channel announcement (TODO)
                        // - for first and last hops early in get_route
-                       if $src_node_id != $dest_node_id {
+                       let src_node_id = $candidate.source();
+                       if Some(src_node_id) != $candidate.target() {
                                let scid_opt = $candidate.short_channel_id();
                                let effective_capacity = $candidate.effective_capacity();
                                let htlc_maximum_msat = max_htlc_from_capacity(effective_capacity, channel_saturation_pow_half);
@@ -1754,7 +1935,7 @@ where L::Target: Logger {
                                // We do this for now, but this is a subject for removal.
                                if let Some(mut available_value_contribution_msat) = htlc_maximum_msat.checked_sub($next_hops_fee_msat) {
                                        let used_liquidity_msat = used_liquidities
-                                               .get(&$candidate.id($src_node_id < $dest_node_id))
+                                               .get(&$candidate.id())
                                                .map_or(0, |used_liquidity_msat| {
                                                        available_value_contribution_msat = available_value_contribution_msat
                                                                .saturating_sub(*used_liquidity_msat);
@@ -1799,12 +1980,12 @@ where L::Target: Logger {
                                        let payment_failed_on_this_channel = scid_opt.map_or(false,
                                                |scid| payment_params.previously_failed_channels.contains(&scid));
 
-                                       let should_log_candidate = match $candidate {
-                                               CandidateRouteHop::FirstHop { .. } => true,
-                                               CandidateRouteHop::PrivateHop { .. } => true,
-                                               CandidateRouteHop::Blinded { .. } => true,
-                                               CandidateRouteHop::OneHopBlinded { .. } => true,
-                                               _ => false,
+                                       let (should_log_candidate, first_hop_details) = match $candidate {
+                                               CandidateRouteHop::FirstHop { details, .. } => (true, Some(details)),
+                                               CandidateRouteHop::PrivateHop { .. } => (true, None),
+                                               CandidateRouteHop::Blinded { .. } => (true, None),
+                                               CandidateRouteHop::OneHopBlinded { .. } => (true, None),
+                                               _ => (false, None),
                                        };
 
                                        // If HTLC minimum is larger than the amount we're going to transfer, we shouldn't
@@ -1814,6 +1995,13 @@ where L::Target: Logger {
                                        if !contributes_sufficient_value {
                                                if should_log_candidate {
                                                        log_trace!(logger, "Ignoring {} due to insufficient value contribution.", LoggedCandidateHop(&$candidate));
+
+                                                       if let Some(details) = first_hop_details {
+                                                               log_trace!(logger,
+                                                                       "First hop candidate next_outbound_htlc_limit_msat: {}",
+                                                                       details.next_outbound_htlc_limit_msat,
+                                                               );
+                                                       }
                                                }
                                                num_ignored_value_contribution += 1;
                                        } else if exceeds_max_path_length {
@@ -1824,6 +2012,14 @@ where L::Target: Logger {
                                        } else if exceeds_cltv_delta_limit {
                                                if should_log_candidate {
                                                        log_trace!(logger, "Ignoring {} due to exceeding CLTV delta limit.", LoggedCandidateHop(&$candidate));
+
+                                                       if let Some(_) = first_hop_details {
+                                                               log_trace!(logger,
+                                                                       "First hop candidate cltv_expiry_delta: {}. Limit: {}",
+                                                                       hop_total_cltv_delta,
+                                                                       max_total_cltv_expiry_delta,
+                                                               );
+                                                       }
                                                }
                                                num_ignored_cltv_delta_limit += 1;
                                        } else if payment_failed_on_this_channel {
@@ -1836,6 +2032,13 @@ where L::Target: Logger {
                                                        log_trace!(logger,
                                                                "Ignoring {} to avoid overpaying to meet htlc_minimum_msat limit.",
                                                                LoggedCandidateHop(&$candidate));
+
+                                                       if let Some(details) = first_hop_details {
+                                                               log_trace!(logger,
+                                                                       "First hop candidate next_outbound_htlc_minimum_msat: {}",
+                                                                       details.next_outbound_htlc_minimum_msat,
+                                                               );
+                                                       }
                                                }
                                                num_ignored_avoid_overpayment += 1;
                                                hit_minimum_limit = true;
@@ -1849,15 +2052,14 @@ where L::Target: Logger {
                                                );
                                                let path_htlc_minimum_msat = compute_fees_saturating(curr_min, $candidate.fees())
                                                        .saturating_add(curr_min);
-                                               let hm_entry = dist.entry($src_node_id);
+                                               let hm_entry = dist.entry(src_node_id);
                                                let old_entry = hm_entry.or_insert_with(|| {
                                                        // If there was previously no known way to access the source node
                                                        // (recall it goes payee-to-payer) of short_channel_id, first add a
                                                        // semi-dummy record just to compute the fees to reach the source node.
                                                        // This will affect our decision on selecting short_channel_id
-                                                       // as a way to reach the $dest_node_id.
+                                                       // as a way to reach the $candidate.target() node.
                                                        PathBuildingHop {
-                                                               node_id: $dest_node_id.clone(),
                                                                candidate: $candidate.clone(),
                                                                fee_msat: 0,
                                                                next_hops_fee_msat: u64::max_value(),
@@ -1886,7 +2088,7 @@ where L::Target: Logger {
 
                                                        // Ignore hop_use_fee_msat for channel-from-us as we assume all channels-from-us
                                                        // will have the same effective-fee
-                                                       if $src_node_id != our_node_id {
+                                                       if src_node_id != our_node_id {
                                                                // Note that `u64::max_value` means we'll always fail the
                                                                // `old_entry.total_fee_msat > total_fee_msat` check below
                                                                hop_use_fee_msat = compute_fees_saturating(amount_to_transfer_over_msat, $candidate.fees());
@@ -1897,6 +2099,14 @@ where L::Target: Logger {
                                                        if total_fee_msat > max_total_routing_fee_msat {
                                                                if should_log_candidate {
                                                                        log_trace!(logger, "Ignoring {} due to exceeding max total routing fee limit.", LoggedCandidateHop(&$candidate));
+
+                                                                       if let Some(_) = first_hop_details {
+                                                                               log_trace!(logger,
+                                                                                       "First hop candidate routing fee: {}. Limit: {}",
+                                                                                       total_fee_msat,
+                                                                                       max_total_routing_fee_msat,
+                                                                               );
+                                                                       }
                                                                }
                                                                num_ignored_total_fee_limit += 1;
                                                        } else {
@@ -1905,22 +2115,15 @@ where L::Target: Logger {
                                                                        inflight_htlc_msat: used_liquidity_msat,
                                                                        effective_capacity,
                                                                };
-                                                               let channel_penalty_msat = scid_opt.map_or(0,
-                                                                       |scid| scorer.channel_penalty_msat(scid, &$src_node_id, &$dest_node_id,
-                                                                               channel_usage, score_params));
+                                                               let channel_penalty_msat =
+                                                                       scorer.channel_penalty_msat($candidate,
+                                                                               channel_usage,
+                                                                               score_params);
                                                                let path_penalty_msat = $next_hops_path_penalty_msat
                                                                        .saturating_add(channel_penalty_msat);
-                                                               let new_graph_node = RouteGraphNode {
-                                                                       node_id: $src_node_id,
-                                                                       lowest_fee_to_node: total_fee_msat,
-                                                                       total_cltv_delta: hop_total_cltv_delta,
-                                                                       value_contribution_msat,
-                                                                       path_htlc_minimum_msat,
-                                                                       path_penalty_msat,
-                                                                       path_length_to_node,
-                                                               };
 
-                                                               // Update the way of reaching $src_node_id with the given short_channel_id (from $dest_node_id),
+                                                               // Update the way of reaching $candidate.source()
+                                                               // with the given short_channel_id (from $candidate.target()),
                                                                // if this way is cheaper than the already known
                                                                // (considering the cost to "reach" this channel from the route destination,
                                                                // the cost of using this channel,
@@ -1942,11 +2145,17 @@ where L::Target: Logger {
                                                                        .saturating_add(path_penalty_msat);
 
                                                                if !old_entry.was_processed && new_cost < old_cost {
+                                                                       let new_graph_node = RouteGraphNode {
+                                                                               node_id: src_node_id,
+                                                                               score: cmp::max(total_fee_msat, path_htlc_minimum_msat).saturating_add(path_penalty_msat),
+                                                                               total_cltv_delta: hop_total_cltv_delta,
+                                                                               value_contribution_msat,
+                                                                               path_length_to_node,
+                                                                       };
                                                                        targets.push(new_graph_node);
                                                                        old_entry.next_hops_fee_msat = $next_hops_fee_msat;
                                                                        old_entry.hop_use_fee_msat = hop_use_fee_msat;
                                                                        old_entry.total_fee_msat = total_fee_msat;
-                                                                       old_entry.node_id = $dest_node_id.clone();
                                                                        old_entry.candidate = $candidate.clone();
                                                                        old_entry.fee_msat = 0; // This value will be later filled with hop_use_fee_msat of the following channel
                                                                        old_entry.path_htlc_minimum_msat = path_htlc_minimum_msat;
@@ -1992,6 +2201,13 @@ where L::Target: Logger {
                                                        log_trace!(logger,
                                                                "Ignoring {} due to its htlc_minimum_msat limit.",
                                                                LoggedCandidateHop(&$candidate));
+
+                                                       if let Some(details) = first_hop_details {
+                                                               log_trace!(logger,
+                                                                       "First hop candidate next_outbound_htlc_minimum_msat: {}",
+                                                                       details.next_outbound_htlc_minimum_msat,
+                                                               );
+                                                       }
                                                }
                                                num_ignored_htlc_minimum_msat_limit += 1;
                                        }
@@ -2009,28 +2225,38 @@ where L::Target: Logger {
        // meaning how much will be paid in fees after this node (to the best of our knowledge).
        // This data can later be helpful to optimize routing (pay lower fees).
        macro_rules! add_entries_to_cheapest_to_target_node {
-               ( $node: expr, $node_id: expr, $fee_to_target_msat: expr, $next_hops_value_contribution: expr,
-                 $next_hops_path_htlc_minimum_msat: expr, $next_hops_path_penalty_msat: expr,
+               ( $node: expr, $node_id: expr, $next_hops_value_contribution: expr,
                  $next_hops_cltv_delta: expr, $next_hops_path_length: expr ) => {
+                       let fee_to_target_msat;
+                       let next_hops_path_htlc_minimum_msat;
+                       let next_hops_path_penalty_msat;
                        let skip_node = if let Some(elem) = dist.get_mut(&$node_id) {
                                let was_processed = elem.was_processed;
                                elem.was_processed = true;
+                               fee_to_target_msat = elem.total_fee_msat;
+                               next_hops_path_htlc_minimum_msat = elem.path_htlc_minimum_msat;
+                               next_hops_path_penalty_msat = elem.path_penalty_msat;
                                was_processed
                        } else {
                                // Entries are added to dist in add_entry!() when there is a channel from a node.
                                // Because there are no channels from payee, it will not have a dist entry at this point.
                                // If we're processing any other node, it is always be the result of a channel from it.
                                debug_assert_eq!($node_id, maybe_dummy_payee_node_id);
+                               fee_to_target_msat = 0;
+                               next_hops_path_htlc_minimum_msat = 0;
+                               next_hops_path_penalty_msat = 0;
                                false
                        };
 
                        if !skip_node {
                                if let Some(first_channels) = first_hop_targets.get(&$node_id) {
                                        for details in first_channels {
-                                               let candidate = CandidateRouteHop::FirstHop { details };
-                                               add_entry!(candidate, our_node_id, $node_id, $fee_to_target_msat,
+                                               let candidate = CandidateRouteHop::FirstHop {
+                                                       details, payer_node_id: &our_node_id,
+                                               };
+                                               add_entry!(&candidate, fee_to_target_msat,
                                                        $next_hops_value_contribution,
-                                                       $next_hops_path_htlc_minimum_msat, $next_hops_path_penalty_msat,
+                                                       next_hops_path_htlc_minimum_msat, next_hops_path_penalty_msat,
                                                        $next_hops_cltv_delta, $next_hops_path_length);
                                        }
                                }
@@ -2052,11 +2278,11 @@ where L::Target: Logger {
                                                                                        info: directed_channel,
                                                                                        short_channel_id: *chan_id,
                                                                                };
-                                                                               add_entry!(candidate, *source, $node_id,
-                                                                                       $fee_to_target_msat,
+                                                                               add_entry!(&candidate,
+                                                                                       fee_to_target_msat,
                                                                                        $next_hops_value_contribution,
-                                                                                       $next_hops_path_htlc_minimum_msat,
-                                                                                       $next_hops_path_penalty_msat,
+                                                                                       next_hops_path_htlc_minimum_msat,
+                                                                                       next_hops_path_penalty_msat,
                                                                                        $next_hops_cltv_delta, $next_hops_path_length);
                                                                        }
                                                                }
@@ -2082,8 +2308,10 @@ where L::Target: Logger {
                // place where it could be added.
                payee_node_id_opt.map(|payee| first_hop_targets.get(&payee).map(|first_channels| {
                        for details in first_channels {
-                               let candidate = CandidateRouteHop::FirstHop { details };
-                               let added = add_entry!(candidate, our_node_id, payee, 0, path_value_msat,
+                               let candidate = CandidateRouteHop::FirstHop {
+                                       details, payer_node_id: &our_node_id,
+                               };
+                               let added = add_entry!(&candidate, 0, path_value_msat,
                                                                        0, 0u64, 0, 0).is_some();
                                log_trace!(logger, "{} direct route to payee via {}",
                                                if added { "Added" } else { "Skipped" }, LoggedCandidateHop(&candidate));
@@ -2099,7 +2327,7 @@ where L::Target: Logger {
                        // If not, targets.pop() will not even let us enter the loop in step 2.
                        None => {},
                        Some(node) => {
-                               add_entries_to_cheapest_to_target_node!(node, payee, 0, path_value_msat, 0, 0u64, 0, 0);
+                               add_entries_to_cheapest_to_target_node!(node, payee, path_value_msat, 0, 0);
                        },
                });
 
@@ -2120,7 +2348,7 @@ where L::Target: Logger {
                                CandidateRouteHop::OneHopBlinded { hint, hint_idx }
                        } else { CandidateRouteHop::Blinded { hint, hint_idx } };
                        let mut path_contribution_msat = path_value_msat;
-                       if let Some(hop_used_msat) = add_entry!(candidate, intro_node_id, maybe_dummy_payee_node_id,
+                       if let Some(hop_used_msat) = add_entry!(&candidate,
                                0, path_contribution_msat, 0, 0_u64, 0, 0)
                        {
                                path_contribution_msat = hop_used_msat;
@@ -2129,14 +2357,16 @@ where L::Target: Logger {
                                sort_first_hop_channels(first_channels, &used_liquidities, recommended_value_msat,
                                        our_node_pubkey);
                                for details in first_channels {
-                                       let first_hop_candidate = CandidateRouteHop::FirstHop { details };
+                                       let first_hop_candidate = CandidateRouteHop::FirstHop {
+                                               details, payer_node_id: &our_node_id,
+                                       };
                                        let blinded_path_fee = match compute_fees(path_contribution_msat, candidate.fees()) {
                                                Some(fee) => fee,
                                                None => continue
                                        };
                                        let path_min = candidate.htlc_minimum_msat().saturating_add(
                                                compute_fees_saturating(candidate.htlc_minimum_msat(), candidate.fees()));
-                                       add_entry!(first_hop_candidate, our_node_id, intro_node_id, blinded_path_fee,
+                                       add_entry!(&first_hop_candidate, blinded_path_fee,
                                                path_contribution_msat, path_min, 0_u64, candidate.cltv_expiry_delta(),
                                                candidate.blinded_path().map_or(1, |bp| bp.blinded_hops.len() as u8));
                                }
@@ -2168,8 +2398,7 @@ where L::Target: Logger {
                                let mut aggregate_path_contribution_msat = path_value_msat;
 
                                for (idx, (hop, prev_hop_id)) in hop_iter.zip(prev_hop_iter).enumerate() {
-                                       let source = NodeId::from_pubkey(&hop.src_node_id);
-                                       let target = NodeId::from_pubkey(&prev_hop_id);
+                                       let target = private_hop_key_cache.get(&prev_hop_id).unwrap();
 
                                        if let Some(first_channels) = first_hop_targets.get(&target) {
                                                if first_channels.iter().any(|d| d.outbound_scid_alias == Some(hop.short_channel_id)) {
@@ -2186,9 +2415,9 @@ where L::Target: Logger {
                                                        info,
                                                        short_channel_id: hop.short_channel_id,
                                                })
-                                               .unwrap_or_else(|| CandidateRouteHop::PrivateHop { hint: hop });
+                                               .unwrap_or_else(|| CandidateRouteHop::PrivateHop { hint: hop, target_node_id: target });
 
-                                       if let Some(hop_used_msat) = add_entry!(candidate, source, target,
+                                       if let Some(hop_used_msat) = add_entry!(&candidate,
                                                aggregate_next_hops_fee_msat, aggregate_path_contribution_msat,
                                                aggregate_next_hops_path_htlc_minimum_msat, aggregate_next_hops_path_penalty_msat,
                                                aggregate_next_hops_cltv_delta, aggregate_next_hops_path_length)
@@ -2202,7 +2431,7 @@ where L::Target: Logger {
                                        }
 
                                        let used_liquidity_msat = used_liquidities
-                                               .get(&candidate.id(source < target)).copied()
+                                               .get(&candidate.id()).copied()
                                                .unwrap_or(0);
                                        let channel_usage = ChannelUsage {
                                                amount_msat: final_value_msat + aggregate_next_hops_fee_msat,
@@ -2210,7 +2439,7 @@ where L::Target: Logger {
                                                effective_capacity: candidate.effective_capacity(),
                                        };
                                        let channel_penalty_msat = scorer.channel_penalty_msat(
-                                               hop.short_channel_id, &source, &target, channel_usage, score_params
+                                               &candidate, channel_usage, score_params
                                        );
                                        aggregate_next_hops_path_penalty_msat = aggregate_next_hops_path_penalty_msat
                                                .saturating_add(channel_penalty_msat);
@@ -2226,8 +2455,10 @@ where L::Target: Logger {
                                                sort_first_hop_channels(first_channels, &used_liquidities,
                                                        recommended_value_msat, our_node_pubkey);
                                                for details in first_channels {
-                                                       let first_hop_candidate = CandidateRouteHop::FirstHop { details };
-                                                       add_entry!(first_hop_candidate, our_node_id, target,
+                                                       let first_hop_candidate = CandidateRouteHop::FirstHop {
+                                                               details, payer_node_id: &our_node_id,
+                                                       };
+                                                       add_entry!(&first_hop_candidate,
                                                                aggregate_next_hops_fee_msat, aggregate_path_contribution_msat,
                                                                aggregate_next_hops_path_htlc_minimum_msat, aggregate_next_hops_path_penalty_msat,
                                                                aggregate_next_hops_cltv_delta, aggregate_next_hops_path_length);
@@ -2271,9 +2502,10 @@ where L::Target: Logger {
                                                        sort_first_hop_channels(first_channels, &used_liquidities,
                                                                recommended_value_msat, our_node_pubkey);
                                                        for details in first_channels {
-                                                               let first_hop_candidate = CandidateRouteHop::FirstHop { details };
-                                                               add_entry!(first_hop_candidate, our_node_id,
-                                                                       NodeId::from_pubkey(&hop.src_node_id),
+                                                               let first_hop_candidate = CandidateRouteHop::FirstHop {
+                                                                       details, payer_node_id: &our_node_id,
+                                                               };
+                                                               add_entry!(&first_hop_candidate,
                                                                        aggregate_next_hops_fee_msat,
                                                                        aggregate_path_contribution_msat,
                                                                        aggregate_next_hops_path_htlc_minimum_msat,
@@ -2302,7 +2534,7 @@ where L::Target: Logger {
                // Both these cases (and other cases except reaching recommended_value_msat) mean that
                // paths_collection will be stopped because found_new_path==false.
                // This is not necessarily a routing failure.
-               'path_construction: while let Some(RouteGraphNode { node_id, lowest_fee_to_node, total_cltv_delta, mut value_contribution_msat, path_htlc_minimum_msat, path_penalty_msat, path_length_to_node, .. }) = targets.pop() {
+               'path_construction: while let Some(RouteGraphNode { node_id, total_cltv_delta, mut value_contribution_msat, path_length_to_node, .. }) = targets.pop() {
 
                        // Since we're going payee-to-payer, hitting our node as a target means we should stop
                        // traversing the graph and arrange the path out of what we found.
@@ -2312,10 +2544,13 @@ where L::Target: Logger {
 
                                'path_walk: loop {
                                        let mut features_set = false;
-                                       if let Some(first_channels) = first_hop_targets.get(&ordered_hops.last().unwrap().0.node_id) {
+                                       let target = ordered_hops.last().unwrap().0.candidate.target().unwrap_or(maybe_dummy_payee_node_id);
+                                       if let Some(first_channels) = first_hop_targets.get(&target) {
                                                for details in first_channels {
-                                                       if let Some(scid) = ordered_hops.last().unwrap().0.candidate.short_channel_id() {
-                                                               if details.get_outbound_payment_scid().unwrap() == scid {
+                                                       if let CandidateRouteHop::FirstHop { details: last_hop_details, .. }
+                                                               = ordered_hops.last().unwrap().0.candidate
+                                                       {
+                                                               if details.get_outbound_payment_scid() == last_hop_details.get_outbound_payment_scid() {
                                                                        ordered_hops.last_mut().unwrap().1 = details.counterparty.features.to_context();
                                                                        features_set = true;
                                                                        break;
@@ -2324,7 +2559,7 @@ where L::Target: Logger {
                                                }
                                        }
                                        if !features_set {
-                                               if let Some(node) = network_nodes.get(&ordered_hops.last().unwrap().0.node_id) {
+                                               if let Some(node) = network_nodes.get(&target) {
                                                        if let Some(node_info) = node.announcement_info.as_ref() {
                                                                ordered_hops.last_mut().unwrap().1 = node_info.features.clone();
                                                        } else {
@@ -2341,11 +2576,11 @@ where L::Target: Logger {
                                        // save this path for the payment route. Also, update the liquidity
                                        // remaining on the used hops, so that we take them into account
                                        // while looking for more paths.
-                                       if ordered_hops.last().unwrap().0.node_id == maybe_dummy_payee_node_id {
+                                       if target == maybe_dummy_payee_node_id {
                                                break 'path_walk;
                                        }
 
-                                       new_entry = match dist.remove(&ordered_hops.last().unwrap().0.node_id) {
+                                       new_entry = match dist.remove(&target) {
                                                Some(payment_hop) => payment_hop,
                                                // We can't arrive at None because, if we ever add an entry to targets,
                                                // we also fill in the entry in dist (see add_entry!).
@@ -2384,12 +2619,10 @@ where L::Target: Logger {
                                // Remember that we used these channels so that we don't rely
                                // on the same liquidity in future paths.
                                let mut prevented_redundant_path_selection = false;
-                               let prev_hop_iter = core::iter::once(&our_node_id)
-                                       .chain(payment_path.hops.iter().map(|(hop, _)| &hop.node_id));
-                               for (prev_hop, (hop, _)) in prev_hop_iter.zip(payment_path.hops.iter()) {
+                               for (hop, _) in payment_path.hops.iter() {
                                        let spent_on_hop_msat = value_contribution_msat + hop.next_hops_fee_msat;
                                        let used_liquidity_msat = used_liquidities
-                                               .entry(hop.candidate.id(*prev_hop < hop.node_id))
+                                               .entry(hop.candidate.id())
                                                .and_modify(|used_liquidity_msat| *used_liquidity_msat += spent_on_hop_msat)
                                                .or_insert(spent_on_hop_msat);
                                        let hop_capacity = hop.candidate.effective_capacity();
@@ -2410,8 +2643,10 @@ where L::Target: Logger {
                                        log_trace!(logger,
                                                "Disabling route candidate {} for future path building iterations to avoid duplicates.",
                                                LoggedCandidateHop(victim_candidate));
-                                       *used_liquidities.entry(victim_candidate.id(false)).or_default() = exhausted;
-                                       *used_liquidities.entry(victim_candidate.id(true)).or_default() = exhausted;
+                                       if let Some(scid) = victim_candidate.short_channel_id() {
+                                               *used_liquidities.entry(CandidateHopId::Clear((scid, false))).or_default() = exhausted;
+                                               *used_liquidities.entry(CandidateHopId::Clear((scid, true))).or_default() = exhausted;
+                                       }
                                }
 
                                // Track the total amount all our collected paths allow to send so that we know
@@ -2434,8 +2669,8 @@ where L::Target: Logger {
                        match network_nodes.get(&node_id) {
                                None => {},
                                Some(node) => {
-                                       add_entries_to_cheapest_to_target_node!(node, node_id, lowest_fee_to_node,
-                                               value_contribution_msat, path_htlc_minimum_msat, path_penalty_msat,
+                                       add_entries_to_cheapest_to_target_node!(node, node_id,
+                                               value_contribution_msat,
                                                total_cltv_delta, path_length_to_node);
                                },
                        }
@@ -2557,15 +2792,15 @@ where L::Target: Logger {
        selected_route.sort_unstable_by_key(|path| {
                let mut key = [CandidateHopId::Clear((42, true)) ; MAX_PATH_LENGTH_ESTIMATE as usize];
                debug_assert!(path.hops.len() <= key.len());
-               for (scid, key) in path.hops.iter() .map(|h| h.0.candidate.id(true)).zip(key.iter_mut()) {
+               for (scid, key) in path.hops.iter() .map(|h| h.0.candidate.id()).zip(key.iter_mut()) {
                        *key = scid;
                }
                key
        });
        for idx in 0..(selected_route.len() - 1) {
                if idx + 1 >= selected_route.len() { break; }
-               if iter_equal(selected_route[idx    ].hops.iter().map(|h| (h.0.candidate.id(true), h.0.node_id)),
-                             selected_route[idx + 1].hops.iter().map(|h| (h.0.candidate.id(true), h.0.node_id))) {
+               if iter_equal(selected_route[idx    ].hops.iter().map(|h| (h.0.candidate.id(), h.0.candidate.target())),
+                             selected_route[idx + 1].hops.iter().map(|h| (h.0.candidate.id(), h.0.candidate.target()))) {
                        let new_value = selected_route[idx].get_value_msat() + selected_route[idx + 1].get_value_msat();
                        selected_route[idx].update_value_and_recompute_fees(new_value);
                        selected_route.remove(idx + 1);
@@ -2575,14 +2810,14 @@ where L::Target: Logger {
        let mut paths = Vec::new();
        for payment_path in selected_route {
                let mut hops = Vec::with_capacity(payment_path.hops.len());
-               let mut prev_hop_node_id = our_node_id;
                for (hop, node_features) in payment_path.hops.iter()
                        .filter(|(h, _)| h.candidate.short_channel_id().is_some())
                {
+                       let target = hop.candidate.target().expect("target is defined when short_channel_id is defined");
                        let maybe_announced_channel = if let CandidateRouteHop::PublicHop { .. } = hop.candidate {
                                // If we sourced the hop from the graph we're sure the target node is announced.
                                true
-                       } else if let CandidateRouteHop::FirstHop { details } = hop.candidate {
+                       } else if let CandidateRouteHop::FirstHop { details, .. } = hop.candidate {
                                // If this is a first hop we also know if it's announced.
                                details.is_public
                        } else {
@@ -2590,14 +2825,14 @@ where L::Target: Logger {
                                // there are announced channels between the endpoints. If so, the hop might be
                                // referring to any of the announced channels, as its `short_channel_id` might be
                                // an alias, in which case we don't take any chances here.
-                               network_graph.node(&hop.node_id).map_or(false, |hop_node|
+                               network_graph.node(&target).map_or(false, |hop_node|
                                        hop_node.channels.iter().any(|scid| network_graph.channel(*scid)
-                                                       .map_or(false, |c| c.as_directed_from(&prev_hop_node_id).is_some()))
+                                                       .map_or(false, |c| c.as_directed_from(&hop.candidate.source()).is_some()))
                                )
                        };
 
                        hops.push(RouteHop {
-                               pubkey: PublicKey::from_slice(hop.node_id.as_slice()).map_err(|_| LightningError{err: format!("Public key {:?} is invalid", &hop.node_id), action: ErrorAction::IgnoreAndLog(Level::Trace)})?,
+                               pubkey: PublicKey::from_slice(target.as_slice()).map_err(|_| LightningError{err: format!("Public key {:?} is invalid", &target), action: ErrorAction::IgnoreAndLog(Level::Trace)})?,
                                node_features: node_features.clone(),
                                short_channel_id: hop.candidate.short_channel_id().unwrap(),
                                channel_features: hop.candidate.features(),
@@ -2605,8 +2840,6 @@ where L::Target: Logger {
                                cltv_expiry_delta: hop.candidate.cltv_expiry_delta(),
                                maybe_announced_channel,
                        });
-
-                       prev_hop_node_id = hop.node_id;
                }
                let mut final_cltv_delta = final_cltv_expiry_delta;
                let blinded_tail = payment_path.hops.last().and_then(|(h, _)| {
@@ -2769,13 +3002,13 @@ fn build_route_from_hops_internal<L: Deref>(
 
        impl ScoreLookUp for HopScorer {
                type ScoreParams = ();
-               fn channel_penalty_msat(&self, _short_channel_id: u64, source: &NodeId, target: &NodeId,
+               fn channel_penalty_msat(&self, candidate: &CandidateRouteHop,
                        _usage: ChannelUsage, _score_params: &Self::ScoreParams) -> u64
                {
                        let mut cur_id = self.our_node_id;
                        for i in 0..self.hop_ids.len() {
                                if let Some(next_id) = self.hop_ids[i] {
-                                       if cur_id == *source && next_id == *target {
+                                       if cur_id == candidate.source() && Some(next_id) == candidate.target() {
                                                return 0;
                                        }
                                        cur_id = next_id;
@@ -2816,13 +3049,13 @@ mod tests {
        use crate::routing::utxo::UtxoResult;
        use crate::routing::router::{get_route, build_route_from_hops_internal, add_random_cltv_offset, default_node_features,
                BlindedTail, InFlightHtlcs, Path, PaymentParameters, Route, RouteHint, RouteHintHop, RouteHop, RoutingFees,
-               DEFAULT_MAX_TOTAL_CLTV_EXPIRY_DELTA, MAX_PATH_LENGTH_ESTIMATE, RouteParameters};
+               DEFAULT_MAX_TOTAL_CLTV_EXPIRY_DELTA, MAX_PATH_LENGTH_ESTIMATE, RouteParameters, CandidateRouteHop};
        use crate::routing::scoring::{ChannelUsage, FixedPenaltyScorer, ScoreLookUp, ProbabilisticScorer, ProbabilisticScoringFeeParameters, ProbabilisticScoringDecayParameters};
        use crate::routing::test_utils::{add_channel, add_or_update_node, build_graph, build_line_graph, id_to_feature_flags, get_nodes, update_channel};
        use crate::chain::transaction::OutPoint;
        use crate::sign::EntropySource;
        use crate::ln::ChannelId;
-       use crate::ln::features::{BlindedHopFeatures, Bolt12InvoiceFeatures, ChannelFeatures, InitFeatures, NodeFeatures};
+       use crate::ln::features::{BlindedHopFeatures, ChannelFeatures, InitFeatures, NodeFeatures};
        use crate::ln::msgs::{ErrorAction, LightningError, UnsignedChannelUpdate, MAX_VALUE_MSAT};
        use crate::ln::channelmanager;
        use crate::offers::invoice::BlindedPayInfo;
@@ -2835,13 +3068,11 @@ mod tests {
 
        use bitcoin::hashes::Hash;
        use bitcoin::network::constants::Network;
-       use bitcoin::blockdata::constants::genesis_block;
+       use bitcoin::blockdata::constants::ChainHash;
        use bitcoin::blockdata::script::Builder;
        use bitcoin::blockdata::opcodes;
        use bitcoin::blockdata::transaction::TxOut;
-
-       use hex;
-
+       use bitcoin::hashes::hex::FromHex;
        use bitcoin::secp256k1::{PublicKey,SecretKey};
        use bitcoin::secp256k1::Secp256k1;
 
@@ -2870,6 +3101,7 @@ mod tests {
                        inbound_scid_alias: None,
                        channel_value_satoshis: 0,
                        user_channel_id: 0,
+                       balance_msat: 0,
                        outbound_capacity_msat,
                        next_outbound_htlc_limit_msat: outbound_capacity_msat,
                        next_outbound_htlc_minimum_msat: 0,
@@ -2965,7 +3197,7 @@ mod tests {
 
                // Disable other paths
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -2977,7 +3209,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -2989,7 +3221,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -3001,7 +3233,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -3013,7 +3245,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 7,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -3028,7 +3260,7 @@ mod tests {
                // Check against amount_to_transfer_over_msat.
                // Set minimal HTLC of 200_000_000 msat.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 3,
                        flags: 0,
@@ -3043,7 +3275,7 @@ mod tests {
                // Second hop only allows to forward 199_999_999 at most, thus not allowing the first hop to
                // be used.
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 3,
                        flags: 0,
@@ -3066,7 +3298,7 @@ mod tests {
 
                // Lift the restriction on the first hop.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 4,
                        flags: 0,
@@ -3089,7 +3321,9 @@ mod tests {
                let (secp_ctx, network_graph, gossip_sync, _, logger) = build_graph();
                let (our_privkey, our_id, privkeys, nodes) = get_nodes(&secp_ctx);
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[2], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[2], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
                let scorer = ln_test_utils::TestScorer::new();
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
@@ -3098,7 +3332,7 @@ mod tests {
                // One path allows transferring 35-40 sats, another one also allows 35-40 sats.
                // Thus, they can't send 60 without overpaying.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 0,
@@ -3110,7 +3344,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 3,
                        flags: 0,
@@ -3124,7 +3358,7 @@ mod tests {
 
                // Make 0 fee.
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0,
@@ -3136,7 +3370,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 2,
                        flags: 0,
@@ -3150,7 +3384,7 @@ mod tests {
 
                // Disable other paths
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 3,
                        flags: 2, // to disable
@@ -3175,7 +3409,7 @@ mod tests {
                // Now, test that if there are 2 paths, a "cheaper" by fee path wouldn't be prioritized
                // while taking even more fee to match htlc_minimum_msat.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 4,
                        flags: 0,
@@ -3187,7 +3421,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 3,
                        flags: 0,
@@ -3199,7 +3433,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 4,
                        flags: 0,
@@ -3235,7 +3469,7 @@ mod tests {
                let (secp_ctx, network_graph, gossip_sync, _, logger) = build_graph();
                let (_, our_id, privkeys, nodes) = get_nodes(&secp_ctx);
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[2], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[2], 42).with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config)).unwrap();
                let scorer = ln_test_utils::TestScorer::new();
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
@@ -3244,7 +3478,7 @@ mod tests {
 
                // First disable all paths except the us -> node1 -> node2 path
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 3,
@@ -3258,7 +3492,7 @@ mod tests {
 
                // Set channel 4 to free but with a high htlc_minimum_msat
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 2,
                        flags: 0,
@@ -3302,7 +3536,7 @@ mod tests {
 
                // // Disable channels 4 and 12 by flags=2
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -3314,7 +3548,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -3746,7 +3980,7 @@ mod tests {
 
                // Disabling channels 6 & 7 by flags=2
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -3758,7 +3992,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 7,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -3809,7 +4043,7 @@ mod tests {
                let (secp_ctx, network_graph, gossip_sync, _, logger) = build_graph();
                let (_, our_id, privkeys, nodes) = get_nodes(&secp_ctx);
 
-               let non_announced_privkey = SecretKey::from_slice(&hex::decode(format!("{:02x}", 0xf0).repeat(32)).unwrap()[..]).unwrap();
+               let non_announced_privkey = SecretKey::from_slice(&<Vec<u8>>::from_hex(&format!("{:02x}", 0xf0).repeat(32)).unwrap()[..]).unwrap();
                let non_announced_pubkey = PublicKey::from_secret_key(&secp_ctx, &non_announced_privkey);
 
                let last_hops = multi_hop_last_hops_hint([nodes[2], non_announced_pubkey]);
@@ -3820,7 +4054,7 @@ mod tests {
 
                // Disabling channels 6 & 7 by flags=2
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -3832,7 +4066,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 7,
                        timestamp: 2,
                        flags: 2, // to disable
@@ -4090,9 +4324,9 @@ mod tests {
        }
 
        fn do_unannounced_path_test(last_hop_htlc_max: Option<u64>, last_hop_fee_prop: u32, outbound_capacity_msat: u64, route_val: u64) -> Result<Route, LightningError> {
-               let source_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&hex::decode(format!("{:02}", 41).repeat(32)).unwrap()[..]).unwrap());
-               let middle_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&hex::decode(format!("{:02}", 42).repeat(32)).unwrap()[..]).unwrap());
-               let target_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&hex::decode(format!("{:02}", 43).repeat(32)).unwrap()[..]).unwrap());
+               let source_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&<Vec<u8>>::from_hex(&format!("{:02}", 41).repeat(32)).unwrap()[..]).unwrap());
+               let middle_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&<Vec<u8>>::from_hex(&format!("{:02}", 42).repeat(32)).unwrap()[..]).unwrap());
+               let target_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&<Vec<u8>>::from_hex(&format!("{:02}", 43).repeat(32)).unwrap()[..]).unwrap());
 
                // If we specify a channel to a middle hop, that overrides our local channel view and that gets used
                let last_hops = RouteHint(vec![RouteHintHop {
@@ -4127,8 +4361,8 @@ mod tests {
                // hints.
                let route = do_unannounced_path_test(None, 1, 2000000, 1000000).unwrap();
 
-               let middle_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&hex::decode(format!("{:02}", 42).repeat(32)).unwrap()[..]).unwrap());
-               let target_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&hex::decode(format!("{:02}", 43).repeat(32)).unwrap()[..]).unwrap());
+               let middle_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&<Vec<u8>>::from_hex(&format!("{:02}", 42).repeat(32)).unwrap()[..]).unwrap());
+               let target_node_id = PublicKey::from_secret_key(&Secp256k1::new(), &SecretKey::from_slice(&<Vec<u8>>::from_hex(&format!("{:02}", 43).repeat(32)).unwrap()[..]).unwrap());
                assert_eq!(route.paths[0].hops.len(), 2);
 
                assert_eq!(route.paths[0].hops[0].pubkey, middle_node_id);
@@ -4174,14 +4408,16 @@ mod tests {
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[2], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[2], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
 
                // We will use a simple single-path route from
                // our node to node2 via node0: channels {1, 3}.
 
                // First disable all other paths.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 2,
@@ -4193,7 +4429,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 2,
@@ -4208,7 +4444,7 @@ mod tests {
                // Make the first channel (#1) very permissive,
                // and we will be testing all limits on the second channel.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 2,
                        flags: 0,
@@ -4223,7 +4459,7 @@ mod tests {
                // First, let's see if routing works if we have absolutely no idea about the available amount.
                // In this case, it should be set to 250_000 sats.
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 2,
                        flags: 0,
@@ -4262,7 +4498,7 @@ mod tests {
                // Check that setting next_outbound_htlc_limit_msat in first_hops limits the channels.
                // Disable channel #1 and use another first hop.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 3,
                        flags: 2,
@@ -4305,7 +4541,7 @@ mod tests {
 
                // Enable channel #1 back.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 4,
                        flags: 0,
@@ -4320,7 +4556,7 @@ mod tests {
 
                // Now let's see if routing works if we know only htlc_maximum_msat.
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 3,
                        flags: 0,
@@ -4361,7 +4597,7 @@ mod tests {
                // We can't change UTXO capacity on the fly, so we'll disable
                // the existing channel and add another one with the capacity we need.
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 4,
                        flags: 2,
@@ -4385,7 +4621,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &privkeys[0], &privkeys[2], ChannelFeatures::from_le_bytes(id_to_feature_flags(3)), 333);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 333,
                        timestamp: 1,
                        flags: 0,
@@ -4397,7 +4633,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 333,
                        timestamp: 1,
                        flags: 1,
@@ -4435,7 +4671,7 @@ mod tests {
 
                // Now let's see if routing chooses htlc_maximum_msat over UTXO capacity.
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 333,
                        timestamp: 6,
                        flags: 0,
@@ -4482,7 +4718,9 @@ mod tests {
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[3], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[3], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
 
                // Path via {node7, node2, node4} is channels {12, 13, 6, 11}.
                // {12, 13, 11} have the capacities of 100, {6} has a capacity of 50.
@@ -4490,7 +4728,7 @@ mod tests {
 
                // Disable other potential paths.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 2,
@@ -4502,7 +4740,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 7,
                        timestamp: 2,
                        flags: 2,
@@ -4517,7 +4755,7 @@ mod tests {
                // Limit capacities
 
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 0,
@@ -4529,7 +4767,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0,
@@ -4542,7 +4780,7 @@ mod tests {
                });
 
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 2,
                        flags: 0,
@@ -4554,7 +4792,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[4], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 11,
                        timestamp: 2,
                        flags: 0,
@@ -4620,7 +4858,7 @@ mod tests {
 
                // Path via node0 is channels {1, 3}. Limit them to 100 and 50 sats (total limit 50).
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 2,
                        flags: 0,
@@ -4632,7 +4870,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 2,
                        flags: 0,
@@ -4666,11 +4904,12 @@ mod tests {
                let (_, _, _, nodes) = get_nodes(&secp_ctx);
                let config = UserConfig::default();
                let clear_payment_params = PaymentParameters::from_node_id(nodes[2], 42)
-                       .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
                do_simple_mpp_route_test(clear_payment_params);
 
                // MPP to a 1-hop blinded path for nodes[2]
-               let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+               let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                let blinded_path = BlindedPath {
                        introduction_node_id: nodes[2],
                        blinding_point: ln_test_utils::pubkey(42),
@@ -4733,7 +4972,7 @@ mod tests {
 
                // Path via node0 is channels {1, 3}. Limit them to 100 and 50 sats (total limit 50).
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 2,
                        flags: 0,
@@ -4745,7 +4984,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 2,
                        flags: 0,
@@ -4760,7 +4999,7 @@ mod tests {
                // Path via node7 is channels {12, 13}. Limit them to 60 and 60 sats
                // (total limit 60).
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 0,
@@ -4772,7 +5011,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0,
@@ -4787,7 +5026,7 @@ mod tests {
                // Path via node1 is channels {2, 4}. Limit them to 200 and 180 sats
                // (total capacity 180 sats).
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 0,
@@ -4799,7 +5038,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 2,
                        flags: 0,
@@ -4909,7 +5148,8 @@ mod tests {
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
                let payment_params = PaymentParameters::from_node_id(nodes[3], 42)
-                       .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
 
                // We need a route consisting of 3 paths:
                // From our node to node3 via {node0, node2}, {node7, node2, node4} and {node7, node2}.
@@ -4920,7 +5160,7 @@ mod tests {
 
                // Disable other potential paths.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 2,
@@ -4932,7 +5172,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 7,
                        timestamp: 2,
                        flags: 2,
@@ -4946,7 +5186,7 @@ mod tests {
 
                // Path via {node0, node2} is channels {1, 3, 5}.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 2,
                        flags: 0,
@@ -4958,7 +5198,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 2,
                        flags: 0,
@@ -4973,7 +5213,7 @@ mod tests {
                // Capacity of 200 sats because this channel will be used by 3rd path as well.
                add_channel(&gossip_sync, &secp_ctx, &privkeys[2], &privkeys[3], ChannelFeatures::from_le_bytes(id_to_feature_flags(5)), 5);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 5,
                        timestamp: 2,
                        flags: 0,
@@ -4989,7 +5229,7 @@ mod tests {
                // Add 100 sats to the capacities of {12, 13}, because these channels
                // are also used for 3rd path. 100 sats for the rest. Total capacity: 100 sats.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 0,
@@ -5001,7 +5241,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0,
@@ -5014,7 +5254,7 @@ mod tests {
                });
 
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 2,
                        flags: 0,
@@ -5026,7 +5266,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[4], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 11,
                        timestamp: 2,
                        flags: 0,
@@ -5080,7 +5320,9 @@ mod tests {
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[3], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[3], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
 
                // This test checks that if we have two cheaper paths and one more expensive path,
                // so that liquidity-wise any 2 of 3 combination is sufficient,
@@ -5095,7 +5337,7 @@ mod tests {
 
                // Disable other potential paths.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 2,
@@ -5107,7 +5349,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 7,
                        timestamp: 2,
                        flags: 2,
@@ -5121,7 +5363,7 @@ mod tests {
 
                // Path via {node0, node2} is channels {1, 3, 5}.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 2,
                        flags: 0,
@@ -5133,7 +5375,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 2,
                        flags: 0,
@@ -5148,7 +5390,7 @@ mod tests {
                // Capacity of 200 sats because this channel will be used by 3rd path as well.
                add_channel(&gossip_sync, &secp_ctx, &privkeys[2], &privkeys[3], ChannelFeatures::from_le_bytes(id_to_feature_flags(5)), 5);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 5,
                        timestamp: 2,
                        flags: 0,
@@ -5164,7 +5406,7 @@ mod tests {
                // Add 100 sats to the capacities of {12, 13}, because these channels
                // are also used for 3rd path. 100 sats for the rest. Total capacity: 100 sats.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 0,
@@ -5176,7 +5418,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0,
@@ -5189,7 +5431,7 @@ mod tests {
                });
 
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 2,
                        flags: 0,
@@ -5201,7 +5443,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[4], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 11,
                        timestamp: 2,
                        flags: 0,
@@ -5253,7 +5495,9 @@ mod tests {
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[3], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[3], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
 
                // We need a route consisting of 2 paths:
                // From our node to node3 via {node0, node2} and {node7, node2, node4}.
@@ -5266,7 +5510,7 @@ mod tests {
 
                // Disable other potential paths.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 2,
@@ -5279,7 +5523,7 @@ mod tests {
                });
 
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 7,
                        timestamp: 2,
                        flags: 2,
@@ -5293,7 +5537,7 @@ mod tests {
 
                // Path via {node0, node2} is channels {1, 3, 5}.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 2,
                        flags: 0,
@@ -5305,7 +5549,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 2,
                        flags: 0,
@@ -5319,7 +5563,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &privkeys[2], &privkeys[3], ChannelFeatures::from_le_bytes(id_to_feature_flags(5)), 5);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 5,
                        timestamp: 2,
                        flags: 0,
@@ -5342,7 +5586,7 @@ mod tests {
                // - fee for channel 6 is 150 sats
                // Let's test this by enforcing these 2 conditions and removing other limits.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 0,
@@ -5354,7 +5598,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0,
@@ -5367,7 +5611,7 @@ mod tests {
                });
 
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 2,
                        flags: 0,
@@ -5379,7 +5623,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[4], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 11,
                        timestamp: 2,
                        flags: 0,
@@ -5408,7 +5652,7 @@ mod tests {
                                max_total_routing_fee_msat: Some(149_999) };
                        if let Err(LightningError{err, action: ErrorAction::IgnoreError}) = get_route(
                                &our_id, &route_params, &network_graph.read_only(), None, Arc::clone(&logger),
-                               &scorer, &(), &random_seed_bytes) {
+                               &scorer, &Default::default(), &random_seed_bytes) {
                                        assert_eq!(err, "Failed to find a sufficient route to the given destination");
                        } else { panic!(); }
                }
@@ -5452,7 +5696,8 @@ mod tests {
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(PublicKey::from_slice(&[02; 33]).unwrap(), 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap()
+               let payment_params = PaymentParameters::from_node_id(PublicKey::from_slice(&[02; 33]).unwrap(), 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config)).unwrap()
                        .with_route_hints(vec![RouteHint(vec![RouteHintHop {
                                src_node_id: nodes[2],
                                short_channel_id: 42,
@@ -5468,7 +5713,7 @@ mod tests {
                // we think we can only send up to 1 additional sat over the last-hop but refuse to as its
                // under 5% of our payment amount.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 2,
                        flags: 0,
@@ -5480,7 +5725,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 0,
@@ -5492,7 +5737,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 2,
                        flags: 0,
@@ -5504,7 +5749,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0|2, // Channel disabled
@@ -5547,7 +5792,9 @@ mod tests {
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[2], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap()
+               let payment_params = PaymentParameters::from_node_id(nodes[2], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap()
                        .with_max_channel_saturation_power_of_half(0);
 
                // We need a route consisting of 3 paths:
@@ -5561,7 +5808,7 @@ mod tests {
 
                // Path via node0 is channels {1, 3}. Limit them to 100 and 50 sats (total limit 50);
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 2,
                        flags: 0,
@@ -5573,7 +5820,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 2,
                        flags: 0,
@@ -5587,7 +5834,7 @@ mod tests {
 
                // Path via node7 is channels {12, 13}. Limit them to 60 and 60 sats (total limit 60);
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 0,
@@ -5599,7 +5846,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0,
@@ -5613,7 +5860,7 @@ mod tests {
 
                // Path via node1 is channels {2, 4}. Limit them to 20 and 20 sats (total capacity 20 sats).
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 0,
@@ -5625,7 +5872,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 2,
                        flags: 0,
@@ -5720,7 +5967,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &our_privkey, &privkeys[1], ChannelFeatures::from_le_bytes(id_to_feature_flags(6)), 6);
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 1,
                        flags: 0,
@@ -5735,7 +5982,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &privkeys[1], &privkeys[4], ChannelFeatures::from_le_bytes(id_to_feature_flags(5)), 5);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 5,
                        timestamp: 1,
                        flags: 0,
@@ -5750,7 +5997,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &privkeys[4], &privkeys[3], ChannelFeatures::from_le_bytes(id_to_feature_flags(4)), 4);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[4], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 1,
                        flags: 0,
@@ -5765,7 +6012,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &privkeys[3], &privkeys[2], ChannelFeatures::from_le_bytes(id_to_feature_flags(3)), 3);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[3], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 3,
                        timestamp: 1,
                        flags: 0,
@@ -5780,7 +6027,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &privkeys[2], &privkeys[4], ChannelFeatures::from_le_bytes(id_to_feature_flags(2)), 2);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[2], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 1,
                        flags: 0,
@@ -5794,7 +6041,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &privkeys[4], &privkeys[6], ChannelFeatures::from_le_bytes(id_to_feature_flags(1)), 1);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[4], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 1,
                        flags: 0,
@@ -5855,7 +6102,7 @@ mod tests {
                // We modify the graph to set the htlc_maximum of channel 2 to below the value we wish to
                // send.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 0,
@@ -5868,7 +6115,7 @@ mod tests {
                });
 
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 12,
                        timestamp: 2,
                        flags: 0,
@@ -5919,13 +6166,15 @@ mod tests {
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[2], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[2], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
 
                // We modify the graph to set the htlc_minimum of channel 2 and 4 as needed - channel 2
                // gets an htlc_maximum_msat of 80_000 and channel 4 an htlc_minimum_msat of 90_000. We
                // then try to send 90_000.
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 0,
@@ -5937,7 +6186,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 2,
                        flags: 0,
@@ -5972,7 +6221,7 @@ mod tests {
                        assert_eq!(route.paths[0].hops[1].short_channel_id, 13);
                        assert_eq!(route.paths[0].hops[1].fee_msat, 90_000);
                        assert_eq!(route.paths[0].hops[1].cltv_expiry_delta, 42);
-                       assert_eq!(route.paths[0].hops[1].node_features.le_flags(), channelmanager::provided_invoice_features(&config).le_flags());
+                       assert_eq!(route.paths[0].hops[1].node_features.le_flags(), channelmanager::provided_bolt11_invoice_features(&config).le_flags());
                        assert_eq!(route.paths[0].hops[1].channel_features.le_flags(), &id_to_feature_flags(13));
                }
        }
@@ -5991,7 +6240,9 @@ mod tests {
                let network_graph = NetworkGraph::new(Network::Testnet, Arc::clone(&logger));
                let scorer = ln_test_utils::TestScorer::new();
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[0], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[0], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
 
@@ -6103,8 +6354,8 @@ mod tests {
        }
        impl ScoreLookUp for BadChannelScorer {
                type ScoreParams = ();
-               fn channel_penalty_msat(&self, short_channel_id: u64, _: &NodeId, _: &NodeId, _: ChannelUsage, _score_params:&Self::ScoreParams) -> u64 {
-                       if short_channel_id == self.short_channel_id { u64::max_value() } else { 0 }
+               fn channel_penalty_msat(&self, candidate: &CandidateRouteHop, _: ChannelUsage, _score_params:&Self::ScoreParams) -> u64 {
+                       if candidate.short_channel_id() == Some(self.short_channel_id) { u64::max_value()  } else { 0  }
                }
        }
 
@@ -6119,8 +6370,8 @@ mod tests {
 
        impl ScoreLookUp for BadNodeScorer {
                type ScoreParams = ();
-               fn channel_penalty_msat(&self, _: u64, _: &NodeId, target: &NodeId, _: ChannelUsage, _score_params:&Self::ScoreParams) -> u64 {
-                       if *target == self.node_id { u64::max_value() } else { 0 }
+               fn channel_penalty_msat(&self, candidate: &CandidateRouteHop, _: ChannelUsage, _score_params:&Self::ScoreParams) -> u64 {
+                       if candidate.target() == Some(self.node_id) { u64::max_value() } else { 0 }
                }
        }
 
@@ -6171,17 +6422,17 @@ mod tests {
                let route = Route {
                        paths: vec![Path { hops: vec![
                                RouteHop {
-                                       pubkey: PublicKey::from_slice(&hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
+                                       pubkey: PublicKey::from_slice(&<Vec<u8>>::from_hex("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
                                        channel_features: ChannelFeatures::empty(), node_features: NodeFeatures::empty(),
                                        short_channel_id: 0, fee_msat: 100, cltv_expiry_delta: 0, maybe_announced_channel: true,
                                },
                                RouteHop {
-                                       pubkey: PublicKey::from_slice(&hex::decode("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
+                                       pubkey: PublicKey::from_slice(&<Vec<u8>>::from_hex("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
                                        channel_features: ChannelFeatures::empty(), node_features: NodeFeatures::empty(),
                                        short_channel_id: 0, fee_msat: 150, cltv_expiry_delta: 0, maybe_announced_channel: true,
                                },
                                RouteHop {
-                                       pubkey: PublicKey::from_slice(&hex::decode("027f31ebc5462c1fdce1b737ecff52d37d75dea43ce11c74d25aa297165faa2007").unwrap()[..]).unwrap(),
+                                       pubkey: PublicKey::from_slice(&<Vec<u8>>::from_hex("027f31ebc5462c1fdce1b737ecff52d37d75dea43ce11c74d25aa297165faa2007").unwrap()[..]).unwrap(),
                                        channel_features: ChannelFeatures::empty(), node_features: NodeFeatures::empty(),
                                        short_channel_id: 0, fee_msat: 225, cltv_expiry_delta: 0, maybe_announced_channel: true,
                                },
@@ -6198,23 +6449,23 @@ mod tests {
                let route = Route {
                        paths: vec![Path { hops: vec![
                                RouteHop {
-                                       pubkey: PublicKey::from_slice(&hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
+                                       pubkey: PublicKey::from_slice(&<Vec<u8>>::from_hex("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
                                        channel_features: ChannelFeatures::empty(), node_features: NodeFeatures::empty(),
                                        short_channel_id: 0, fee_msat: 100, cltv_expiry_delta: 0, maybe_announced_channel: true,
                                },
                                RouteHop {
-                                       pubkey: PublicKey::from_slice(&hex::decode("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
+                                       pubkey: PublicKey::from_slice(&<Vec<u8>>::from_hex("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
                                        channel_features: ChannelFeatures::empty(), node_features: NodeFeatures::empty(),
                                        short_channel_id: 0, fee_msat: 150, cltv_expiry_delta: 0, maybe_announced_channel: true,
                                },
                        ], blinded_tail: None }, Path { hops: vec![
                                RouteHop {
-                                       pubkey: PublicKey::from_slice(&hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
+                                       pubkey: PublicKey::from_slice(&<Vec<u8>>::from_hex("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
                                        channel_features: ChannelFeatures::empty(), node_features: NodeFeatures::empty(),
                                        short_channel_id: 0, fee_msat: 100, cltv_expiry_delta: 0, maybe_announced_channel: true,
                                },
                                RouteHop {
-                                       pubkey: PublicKey::from_slice(&hex::decode("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
+                                       pubkey: PublicKey::from_slice(&<Vec<u8>>::from_hex("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
                                        channel_features: ChannelFeatures::empty(), node_features: NodeFeatures::empty(),
                                        short_channel_id: 0, fee_msat: 150, cltv_expiry_delta: 0, maybe_announced_channel: true,
                                },
@@ -6477,7 +6728,7 @@ mod tests {
                // Set the fee on channel 13 to 100% to match channel 4 giving us two equivalent paths (us
                // -> node 7 -> node2 and us -> node 1 -> node 2) which we should balance over.
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 4,
                        timestamp: 2,
                        flags: 0,
@@ -6489,7 +6740,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[7], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 13,
                        timestamp: 2,
                        flags: 0,
@@ -6502,7 +6753,9 @@ mod tests {
                });
 
                let config = UserConfig::default();
-               let payment_params = PaymentParameters::from_node_id(nodes[2], 42).with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+               let payment_params = PaymentParameters::from_node_id(nodes[2], 42)
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
                let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                // 100,000 sats is less than the available liquidity on each channel, set above.
@@ -6561,7 +6814,7 @@ mod tests {
 
                let params = ProbabilisticScoringFeeParameters::default();
                let mut scorer = ProbabilisticScorer::new(ProbabilisticScoringDecayParameters::default(), &graph, &logger);
-               let features = channelmanager::provided_invoice_features(&UserConfig::default());
+               let features = channelmanager::provided_bolt11_invoice_features(&UserConfig::default());
 
                super::bench_utils::generate_test_routes(&graph, &mut scorer, &params, features, random_init_seed(), 0, 2);
        }
@@ -6582,7 +6835,7 @@ mod tests {
 
                let params = ProbabilisticScoringFeeParameters::default();
                let mut scorer = ProbabilisticScorer::new(ProbabilisticScoringDecayParameters::default(), &graph, &logger);
-               let features = channelmanager::provided_invoice_features(&UserConfig::default());
+               let features = channelmanager::provided_bolt11_invoice_features(&UserConfig::default());
 
                super::bench_utils::generate_test_routes(&graph, &mut scorer, &params, features, random_init_seed(), 1_000_000, 2);
        }
@@ -6606,26 +6859,32 @@ mod tests {
                };
                scorer_params.set_manual_penalty(&NodeId::from_pubkey(&nodes[3]), 123);
                scorer_params.set_manual_penalty(&NodeId::from_pubkey(&nodes[4]), 456);
-               assert_eq!(scorer.channel_penalty_msat(42, &NodeId::from_pubkey(&nodes[3]), &NodeId::from_pubkey(&nodes[4]), usage, &scorer_params), 456);
+               let network_graph = network_graph.read_only();
+               let channels = network_graph.channels();
+               let channel = channels.get(&5).unwrap();
+               let info = channel.as_directed_from(&NodeId::from_pubkey(&nodes[3])).unwrap();
+               let candidate: CandidateRouteHop = CandidateRouteHop::PublicHop {
+                       info: info.0,
+                       short_channel_id: 5,
+               };
+               assert_eq!(scorer.channel_penalty_msat(&candidate, usage, &scorer_params), 456);
 
                // Then check we can get a normal route
                let payment_params = PaymentParameters::from_node_id(nodes[10], 42);
                let route_params = RouteParameters::from_payment_params_and_value(
                        payment_params, 100);
-               let route = get_route(&our_id, &route_params, &network_graph.read_only(), None,
+               let route = get_route(&our_id, &route_params, &network_graph, None,
                        Arc::clone(&logger), &scorer, &scorer_params, &random_seed_bytes);
                assert!(route.is_ok());
 
                // Then check that we can't get a route if we ban an intermediate node.
                scorer_params.add_banned(&NodeId::from_pubkey(&nodes[3]));
-               let route = get_route(&our_id, &route_params, &network_graph.read_only(), None,
-                       Arc::clone(&logger), &scorer, &scorer_params, &random_seed_bytes);
+               let route = get_route(&our_id, &route_params, &network_graph, None, Arc::clone(&logger), &scorer, &scorer_params,&random_seed_bytes);
                assert!(route.is_err());
 
                // Finally make sure we can route again, when we remove the ban.
                scorer_params.remove_banned(&NodeId::from_pubkey(&nodes[3]));
-               let route = get_route(&our_id, &route_params, &network_graph.read_only(), None,
-                       Arc::clone(&logger), &scorer, &scorer_params, &random_seed_bytes);
+               let route = get_route(&our_id, &route_params, &network_graph, None, Arc::clone(&logger), &scorer, &scorer_params,&random_seed_bytes);
                assert!(route.is_ok());
        }
 
@@ -6656,7 +6915,8 @@ mod tests {
                let dest_node_id = ln_test_utils::pubkey(42);
                let payment_params = PaymentParameters::from_node_id(dest_node_id, 42)
                        .with_route_hints(vec![route_hint_1.clone()]).unwrap()
-                       .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
 
                // Make sure we'll error if our route hints don't have enough liquidity according to their
                // htlc_maximum_msat.
@@ -6675,7 +6935,8 @@ mod tests {
                route_hint_2.0[0].short_channel_id = 43;
                let payment_params = PaymentParameters::from_node_id(dest_node_id, 42)
                        .with_route_hints(vec![route_hint_1, route_hint_2]).unwrap()
-                       .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
                let mut route_params = RouteParameters::from_payment_params_and_value(
                        payment_params, max_htlc_msat + 1);
                route_params.max_total_routing_fee_msat = Some(max_htlc_msat * 2);
@@ -6731,7 +6992,8 @@ mod tests {
                let dest_node_id = ln_test_utils::pubkey(44);
                let payment_params = PaymentParameters::from_node_id(dest_node_id, 42)
                        .with_route_hints(vec![route_hint_1, route_hint_2]).unwrap()
-                       .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config))
+                       .unwrap();
 
                let route_params = RouteParameters::from_payment_params_and_value(
                        payment_params, amt_msat);
@@ -6774,7 +7036,7 @@ mod tests {
                        cltv_expiry_delta: 10,
                        features: BlindedHopFeatures::empty(),
                };
-               let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+               let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                let payment_params = PaymentParameters::blinded(vec![
                        (blinded_payinfo.clone(), blinded_path.clone()),
                        (blinded_payinfo.clone(), blinded_path.clone())])
@@ -7083,7 +7345,7 @@ mod tests {
                let random_seed_bytes = keys_manager.get_secure_random_bytes();
                let config = UserConfig::default();
 
-               let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+               let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                let blinded_path_1 = BlindedPath {
                        introduction_node_id: nodes[2],
                        blinding_point: ln_test_utils::pubkey(42),
@@ -7111,7 +7373,7 @@ mod tests {
                        (blinded_payinfo_2.clone(), blinded_path_2.clone()),
                ];
                let payment_params = PaymentParameters::blinded(blinded_hints.clone())
-                       .with_bolt12_features(bolt12_features.clone()).unwrap();
+                       .with_bolt12_features(bolt12_features).unwrap();
 
                let mut route_params = RouteParameters::from_payment_params_and_value(payment_params, 100_000);
                route_params.max_total_routing_fee_msat = Some(100_000);
@@ -7155,7 +7417,7 @@ mod tests {
                add_channel(&gossip_sync, &secp_ctx, &privkeys[0], &privkeys[1],
                        ChannelFeatures::from_le_bytes(id_to_feature_flags(1)), 1);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 1,
                        flags: 0,
@@ -7167,7 +7429,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 1,
                        flags: 1,
@@ -7276,9 +7538,9 @@ mod tests {
                blinded_hints[1].0.htlc_maximum_msat = 2_8089_0861_1584_0000;
                blinded_hints[1].0.cltv_expiry_delta = 0;
 
-               let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+               let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                let payment_params = PaymentParameters::blinded(blinded_hints.clone())
-                       .with_bolt12_features(bolt12_features.clone()).unwrap();
+                       .with_bolt12_features(bolt12_features).unwrap();
 
                let netgraph = network_graph.read_only();
                let route_params = RouteParameters::from_payment_params_and_value(
@@ -7328,7 +7590,7 @@ mod tests {
                ];
                blinded_hints[1].1.introduction_node_id = nodes[6];
 
-               let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+               let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                let payment_params = PaymentParameters::blinded(blinded_hints.clone())
                        .with_bolt12_features(bolt12_features.clone()).unwrap();
 
@@ -7336,7 +7598,7 @@ mod tests {
                let route_params = RouteParameters::from_payment_params_and_value(
                        payment_params, amt_msat);
                if let Err(LightningError { err, .. }) = get_route(
-                       &our_id, &route_params, &netgraph, None, Arc::clone(&logger), &scorer, &(), &random_seed_bytes
+                       &our_id, &route_params, &netgraph, None, Arc::clone(&logger), &scorer, &Default::default(), &random_seed_bytes
                ) {
                        assert_eq!(err, "Failed to find a path to the given destination");
                } else { panic!() }
@@ -7385,7 +7647,7 @@ mod tests {
 
                blinded_hints[2].1.introduction_node_id = nodes[6];
 
-               let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+               let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                let payment_params = PaymentParameters::blinded(blinded_hints.clone())
                        .with_bolt12_features(bolt12_features.clone()).unwrap();
 
@@ -7393,7 +7655,7 @@ mod tests {
                let route_params = RouteParameters::from_payment_params_and_value(
                        payment_params, amt_msat);
                if let Err(LightningError { err, .. }) = get_route(
-                       &our_id, &route_params, &netgraph, None, Arc::clone(&logger), &scorer, &(), &random_seed_bytes
+                       &our_id, &route_params, &netgraph, None, Arc::clone(&logger), &scorer, &Default::default(), &random_seed_bytes
                ) {
                        assert_eq!(err, "Failed to find a path to the given destination");
                } else { panic!() }
@@ -7445,7 +7707,7 @@ mod tests {
                                cltv_expiry_delta: 0,
                                features: BlindedHopFeatures::empty(),
                        };
-                       let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+                       let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                        PaymentParameters::blinded(vec![(blinded_payinfo, blinded_path)])
                                .with_bolt12_features(bolt12_features.clone()).unwrap()
                } else {
@@ -7463,7 +7725,7 @@ mod tests {
 
                        PaymentParameters::from_node_id(nodes[1], 42)
                                .with_route_hints(vec![route_hint]).unwrap()
-                               .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap()
+                               .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config)).unwrap()
                };
 
                let netgraph = network_graph.read_only();
@@ -7471,7 +7733,7 @@ mod tests {
                        payment_params, amt_msat);
                if let Err(LightningError { err, .. }) = get_route(
                        &our_id, &route_params, &netgraph, Some(&first_hops.iter().collect::<Vec<_>>()),
-                       Arc::clone(&logger), &scorer, &(), &random_seed_bytes
+                       Arc::clone(&logger), &scorer, &Default::default(), &random_seed_bytes
                ) {
                        assert_eq!(err, "Failed to find a path to the given destination");
                } else { panic!() }
@@ -7528,7 +7790,7 @@ mod tests {
                                        features: BlindedHopFeatures::empty(),
                                }, blinded_path.clone()));
                        }
-                       let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+                       let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                        PaymentParameters::blinded(blinded_hints.clone())
                                .with_bolt12_features(bolt12_features.clone()).unwrap()
                } else {
@@ -7548,7 +7810,7 @@ mod tests {
                        }
                        PaymentParameters::from_node_id(nodes[1], 42)
                                .with_route_hints(route_hints).unwrap()
-                               .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap()
+                               .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config)).unwrap()
                };
 
                let netgraph = network_graph.read_only();
@@ -7557,7 +7819,7 @@ mod tests {
 
                let route = get_route(
                        &our_id, &route_params, &netgraph, Some(&first_hops.iter().collect::<Vec<_>>()),
-                       Arc::clone(&logger), &scorer, &(), &random_seed_bytes
+                       Arc::clone(&logger), &scorer, &Default::default(), &random_seed_bytes
                ).unwrap();
                assert_eq!(route.paths.len(), 1);
                assert_eq!(route.get_total_amount(), amt_msat);
@@ -7588,7 +7850,7 @@ mod tests {
 
                add_channel(&gossip_sync, &secp_ctx, &privkeys[0], &privkeys[6], ChannelFeatures::from_le_bytes(id_to_feature_flags(6)), 6);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 6,
                        timestamp: 1,
                        flags: 0,
@@ -7619,7 +7881,7 @@ mod tests {
                                ],
                        })
                ];
-               let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+               let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                let payment_params = PaymentParameters::blinded(blinded_hints.clone())
                        .with_bolt12_features(bolt12_features.clone()).unwrap();
                let route_params = RouteParameters::from_payment_params_and_value(
@@ -7679,7 +7941,7 @@ mod tests {
                                        features: BlindedHopFeatures::empty(),
                                }, blinded_path.clone()));
                        }
-                       let bolt12_features: Bolt12InvoiceFeatures = channelmanager::provided_invoice_features(&config).to_context();
+                       let bolt12_features = channelmanager::provided_bolt12_invoice_features(&config);
                        PaymentParameters::blinded(blinded_hints.clone())
                                .with_bolt12_features(bolt12_features.clone()).unwrap()
                };
@@ -7715,7 +7977,7 @@ mod tests {
                add_channel(&gossip_sync, &secp_ctx, &our_privkey, &privkeys[0],
                        ChannelFeatures::from_le_bytes(id_to_feature_flags(1)), 1);
                update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 1,
                        flags: 0,
@@ -7727,7 +7989,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 1,
                        timestamp: 1,
                        flags: 1,
@@ -7742,7 +8004,7 @@ mod tests {
                add_channel(&gossip_sync, &secp_ctx, &privkeys[0], &privkeys[1],
                        ChannelFeatures::from_le_bytes(id_to_feature_flags(1)), 2);
                update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 0,
@@ -7754,7 +8016,7 @@ mod tests {
                        excess_data: Vec::new()
                });
                update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
-                       chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+                       chain_hash: ChainHash::using_genesis_block(Network::Testnet),
                        short_channel_id: 2,
                        timestamp: 2,
                        flags: 1,
@@ -7793,7 +8055,7 @@ mod tests {
 
                let payment_params = PaymentParameters::from_node_id(dest_node_id, 42)
                        .with_route_hints(vec![route_hint]).unwrap()
-                       .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config)).unwrap();
                let route_params = RouteParameters::from_payment_params_and_value(
                        payment_params, amt_msat);
 
@@ -7841,6 +8103,57 @@ mod tests {
                assert_eq!(route.paths[0].hops[1].short_channel_id, 45);
                assert_eq!(route.get_total_fees(), 123);
        }
+
+       #[test]
+       fn allow_us_being_first_hint() {
+               // Check that we consider a route hint even if we are the src of the first hop.
+               let secp_ctx = Secp256k1::new();
+               let logger = Arc::new(ln_test_utils::TestLogger::new());
+               let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, Arc::clone(&logger)));
+               let scorer = ln_test_utils::TestScorer::new();
+               let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
+               let random_seed_bytes = keys_manager.get_secure_random_bytes();
+               let config = UserConfig::default();
+
+               let (_, our_node_id, _, nodes) = get_nodes(&secp_ctx);
+
+               let amt_msat = 1_000_000;
+               let dest_node_id = nodes[1];
+
+               let first_hop = get_channel_details(Some(1), nodes[0], channelmanager::provided_init_features(&config), 10_000_000);
+               let first_hops = vec![first_hop];
+
+               let route_hint = RouteHint(vec![RouteHintHop {
+                       src_node_id: our_node_id,
+                       short_channel_id: 44,
+                       fees: RoutingFees {
+                               base_msat: 123,
+                               proportional_millionths: 0,
+                       },
+                       cltv_expiry_delta: 10,
+                       htlc_minimum_msat: None,
+                       htlc_maximum_msat: None,
+               }]);
+
+               let payment_params = PaymentParameters::from_node_id(dest_node_id, 42)
+                       .with_route_hints(vec![route_hint]).unwrap()
+                       .with_bolt11_features(channelmanager::provided_bolt11_invoice_features(&config)).unwrap();
+
+               let route_params = RouteParameters::from_payment_params_and_value(
+                       payment_params, amt_msat);
+
+
+               let route = get_route(&our_node_id, &route_params, &network_graph.read_only(),
+                       Some(&first_hops.iter().collect::<Vec<_>>()), Arc::clone(&logger), &scorer,
+                       &Default::default(), &random_seed_bytes).unwrap();
+
+               assert_eq!(route.paths.len(), 1);
+               assert_eq!(route.get_total_amount(), amt_msat);
+               assert_eq!(route.get_total_fees(), 0);
+               assert_eq!(route.paths[0].hops.len(), 1);
+
+               assert_eq!(route.paths[0].hops[0].short_channel_id, 44);
+       }
 }
 
 #[cfg(all(any(test, ldk_bench), not(feature = "no-std")))]
@@ -7926,6 +8239,7 @@ pub(crate) mod bench_utils {
                        outbound_scid_alias: None,
                        channel_value_satoshis: 10_000_000_000,
                        user_channel_id: 0,
+                       balance_msat: 10_000_000_000,
                        outbound_capacity_msat: 10_000_000_000,
                        next_outbound_htlc_minimum_msat: 0,
                        next_outbound_htlc_limit_msat: 10_000_000_000,
@@ -7983,7 +8297,7 @@ pub(crate) mod bench_utils {
                                                // Generate fail/success paths for a wider range of potential amounts with
                                                // MPP enabled to give us a chance to apply penalties for more potential
                                                // routes.
-                                               let mpp_features = channelmanager::provided_invoice_features(&UserConfig::default());
+                                               let mpp_features = channelmanager::provided_bolt11_invoice_features(&UserConfig::default());
                                                let params = PaymentParameters::from_node_id(dst, 42)
                                                        .with_bolt11_features(mpp_features).unwrap();
                                                let route_params = RouteParameters::from_payment_params_and_value(
@@ -8045,7 +8359,7 @@ pub mod benches {
 
        struct DummyLogger {}
        impl Logger for DummyLogger {
-               fn log(&self, _record: &Record) {}
+               fn log(&self, _record: Record) {}
        }
 
        pub fn generate_routes_with_zero_penalty_scorer(bench: &mut Criterion) {
@@ -8061,7 +8375,7 @@ pub mod benches {
                let network_graph = bench_utils::read_network_graph(&logger).unwrap();
                let scorer = FixedPenaltyScorer::with_penalty(0);
                generate_routes(bench, &network_graph, scorer, &Default::default(),
-                       channelmanager::provided_invoice_features(&UserConfig::default()), 0,
+                       channelmanager::provided_bolt11_invoice_features(&UserConfig::default()), 0,
                        "generate_mpp_routes_with_zero_penalty_scorer");
        }
 
@@ -8080,7 +8394,7 @@ pub mod benches {
                let params = ProbabilisticScoringFeeParameters::default();
                let scorer = ProbabilisticScorer::new(ProbabilisticScoringDecayParameters::default(), &network_graph, &logger);
                generate_routes(bench, &network_graph, scorer, &params,
-                       channelmanager::provided_invoice_features(&UserConfig::default()), 0,
+                       channelmanager::provided_bolt11_invoice_features(&UserConfig::default()), 0,
                        "generate_mpp_routes_with_probabilistic_scorer");
        }
 
@@ -8090,7 +8404,7 @@ pub mod benches {
                let params = ProbabilisticScoringFeeParameters::default();
                let scorer = ProbabilisticScorer::new(ProbabilisticScoringDecayParameters::default(), &network_graph, &logger);
                generate_routes(bench, &network_graph, scorer, &params,
-                       channelmanager::provided_invoice_features(&UserConfig::default()), 100_000_000,
+                       channelmanager::provided_bolt11_invoice_features(&UserConfig::default()), 100_000_000,
                        "generate_large_mpp_routes_with_probabilistic_scorer");
        }
 
@@ -8102,7 +8416,7 @@ pub mod benches {
                let scorer = ProbabilisticScorer::new(
                        ProbabilisticScoringDecayParameters::default(), &network_graph, &logger);
                generate_routes(bench, &network_graph, scorer, &params,
-                       channelmanager::provided_invoice_features(&UserConfig::default()), 0,
+                       channelmanager::provided_bolt11_invoice_features(&UserConfig::default()), 0,
                        "generate_routes_with_nonlinear_probabilistic_scorer");
        }
 
@@ -8114,7 +8428,7 @@ pub mod benches {
                let scorer = ProbabilisticScorer::new(
                        ProbabilisticScoringDecayParameters::default(), &network_graph, &logger);
                generate_routes(bench, &network_graph, scorer, &params,
-                       channelmanager::provided_invoice_features(&UserConfig::default()), 0,
+                       channelmanager::provided_bolt11_invoice_features(&UserConfig::default()), 0,
                        "generate_mpp_routes_with_nonlinear_probabilistic_scorer");
        }
 
@@ -8126,7 +8440,7 @@ pub mod benches {
                let scorer = ProbabilisticScorer::new(
                        ProbabilisticScoringDecayParameters::default(), &network_graph, &logger);
                generate_routes(bench, &network_graph, scorer, &params,
-                       channelmanager::provided_invoice_features(&UserConfig::default()), 100_000_000,
+                       channelmanager::provided_bolt11_invoice_features(&UserConfig::default()), 100_000_000,
                        "generate_large_mpp_routes_with_nonlinear_probabilistic_scorer");
        }