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Remove previously deprecated Scorer

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This commit is contained in:
Elias Rohrer 2022-05-26 18:20:05 -07:00
parent f84ce03cab
commit 84c94a8fd9
2 changed files with 4 additions and 539 deletions
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16
lightning/src/routing/router.rs
View file

@ -5700,7 +5700,7 @@ mod benches {
use chain::keysinterface::{KeysManager,KeysInterface}; use chain::keysinterface::{KeysManager,KeysInterface};
use ln::channelmanager::{ChannelCounterparty, ChannelDetails}; use ln::channelmanager::{ChannelCounterparty, ChannelDetails};
use ln::features::{InitFeatures, InvoiceFeatures}; use ln::features::{InitFeatures, InvoiceFeatures};
use routing::scoring::{FixedPenaltyScorer, ProbabilisticScorer, ProbabilisticScoringParameters, Scorer}; use routing::scoring::{FixedPenaltyScorer, ProbabilisticScorer, ProbabilisticScoringParameters};
use util::logger::{Logger, Record}; use util::logger::{Logger, Record};
use util::test_utils::TestLogger; use util::test_utils::TestLogger;
@ -5772,20 +5772,6 @@ mod benches {
generate_routes(bench, &network_graph, scorer, InvoiceFeatures::known()); generate_routes(bench, &network_graph, scorer, InvoiceFeatures::known());
} }
#[bench]
fn generate_routes_with_default_scorer(bench: &mut Bencher) {
let network_graph = read_network_graph();
let scorer = Scorer::default();
generate_routes(bench, &network_graph, scorer, InvoiceFeatures::empty());
}
#[bench]
fn generate_mpp_routes_with_default_scorer(bench: &mut Bencher) {
let network_graph = read_network_graph();
let scorer = Scorer::default();
generate_routes(bench, &network_graph, scorer, InvoiceFeatures::known());
}
#[bench] #[bench]
fn generate_routes_with_probabilistic_scorer(bench: &mut Bencher) { fn generate_routes_with_probabilistic_scorer(bench: &mut Bencher) {
let logger = TestLogger::new(); let logger = TestLogger::new();

527
lightning/src/routing/scoring.rs
View file

@ -19,7 +19,7 @@
//! # //! #
//! # use lightning::routing::network_graph::NetworkGraph; //! # use lightning::routing::network_graph::NetworkGraph;
//! # use lightning::routing::router::{RouteParameters, find_route}; //! # use lightning::routing::router::{RouteParameters, find_route};
//! # use lightning::routing::scoring::{ProbabilisticScorer, ProbabilisticScoringParameters, Scorer, ScoringParameters}; //! # use lightning::routing::scoring::{ProbabilisticScorer, ProbabilisticScoringParameters};
//! # use lightning::chain::keysinterface::{KeysManager, KeysInterface}; //! # use lightning::chain::keysinterface::{KeysManager, KeysInterface};
//! # use lightning::util::logger::{Logger, Record}; //! # use lightning::util::logger::{Logger, Record};
//! # use bitcoin::secp256k1::PublicKey; //! # use bitcoin::secp256k1::PublicKey;
@ -259,25 +259,6 @@ impl ReadableArgs<u64> for FixedPenaltyScorer {
} }
} }
/// [`Score`] implementation that provides reasonable default behavior.
///
/// Used to apply a fixed penalty to each channel, thus avoiding long paths when shorter paths with
/// slightly higher fees are available. Will further penalize channels that fail to relay payments.
///
/// See [module-level documentation] for usage and [`ScoringParameters`] for customization.
///
/// # Note
///
/// Mixing the `no-std` feature between serialization and deserialization results in undefined
/// behavior.
///
/// [module-level documentation]: crate::routing::scoring
#[deprecated(
since = "0.0.105",
note = "ProbabilisticScorer should be used instead of Scorer.",
)]
pub type Scorer = ScorerUsingTime::<ConfiguredTime>;
#[cfg(not(feature = "no-std"))] #[cfg(not(feature = "no-std"))]
type ConfiguredTime = std::time::Instant; type ConfiguredTime = std::time::Instant;
#[cfg(feature = "no-std")] #[cfg(feature = "no-std")]
@ -285,236 +266,6 @@ use util::time::Eternity;
#[cfg(feature = "no-std")] #[cfg(feature = "no-std")]
type ConfiguredTime = Eternity; type ConfiguredTime = Eternity;
// Note that ideally we'd hide ScorerUsingTime from public view by sealing it as well, but rustdoc
// doesn't handle this well - instead exposing a `Scorer` which has no trait implementation(s) or
// methods at all.
/// [`Score`] implementation.
///
/// (C-not exported) generally all users should use the [`Scorer`] type alias.
pub struct ScorerUsingTime<T: Time> {
params: ScoringParameters,
// TODO: Remove entries of closed channels.
channel_failures: HashMap<u64, ChannelFailure<T>>,
}
#[derive(Clone)]
/// Parameters for configuring [`Scorer`].
pub struct ScoringParameters {
/// A fixed penalty in msats to apply to each channel.
///
/// Default value: 500 msat
pub base_penalty_msat: u64,
/// A penalty in msats to apply to a channel upon failing to relay a payment.
///
/// This accumulates for each failure but may be reduced over time based on
/// [`failure_penalty_half_life`] or when successfully routing through a channel.
///
/// Default value: 1,024,000 msat
///
/// [`failure_penalty_half_life`]: Self::failure_penalty_half_life
pub failure_penalty_msat: u64,
/// When the amount being sent over a channel is this many 1024ths of the total channel
/// capacity, we begin applying [`overuse_penalty_msat_per_1024th`].
///
/// Default value: 128 1024ths (i.e. begin penalizing when an HTLC uses 1/8th of a channel)
///
/// [`overuse_penalty_msat_per_1024th`]: Self::overuse_penalty_msat_per_1024th
pub overuse_penalty_start_1024th: u16,
/// A penalty applied, per whole 1024ths of the channel capacity which the amount being sent
/// over the channel exceeds [`overuse_penalty_start_1024th`] by.
///
/// Default value: 20 msat (i.e. 2560 msat penalty to use 1/4th of a channel, 7680 msat penalty
/// to use half a channel, and 12,560 msat penalty to use 3/4ths of a channel)
///
/// [`overuse_penalty_start_1024th`]: Self::overuse_penalty_start_1024th
pub overuse_penalty_msat_per_1024th: u64,
/// The time required to elapse before any accumulated [`failure_penalty_msat`] penalties are
/// cut in half.
///
/// Successfully routing through a channel will immediately cut the penalty in half as well.
///
/// Default value: 1 hour
///
/// # Note
///
/// When built with the `no-std` feature, time will never elapse. Therefore, this penalty will
/// never decay.
///
/// [`failure_penalty_msat`]: Self::failure_penalty_msat
pub failure_penalty_half_life: Duration,
}
impl_writeable_tlv_based!(ScoringParameters, {
(0, base_penalty_msat, required),
(1, overuse_penalty_start_1024th, (default_value, 128)),
(2, failure_penalty_msat, required),
(3, overuse_penalty_msat_per_1024th, (default_value, 20)),
(4, failure_penalty_half_life, required),
});
/// Accounting for penalties against a channel for failing to relay any payments.
///
/// Penalties decay over time, though accumulate as more failures occur.
struct ChannelFailure<T: Time> {
/// Accumulated penalty in msats for the channel as of `last_updated`.
undecayed_penalty_msat: u64,
/// Last time the channel either failed to route or successfully routed a payment. Used to decay
/// `undecayed_penalty_msat`.
last_updated: T,
}
impl<T: Time> ScorerUsingTime<T> {
/// Creates a new scorer using the given scoring parameters.
pub fn new(params: ScoringParameters) -> Self {
Self {
params,
channel_failures: HashMap::new(),
}
}
}
impl<T: Time> ChannelFailure<T> {
fn new(failure_penalty_msat: u64) -> Self {
Self {
undecayed_penalty_msat: failure_penalty_msat,
last_updated: T::now(),
}
}
fn add_penalty(&mut self, failure_penalty_msat: u64, half_life: Duration) {
self.undecayed_penalty_msat = self.decayed_penalty_msat(half_life) + failure_penalty_msat;
self.last_updated = T::now();
}
fn reduce_penalty(&mut self, half_life: Duration) {
self.undecayed_penalty_msat = self.decayed_penalty_msat(half_life) >> 1;
self.last_updated = T::now();
}
fn decayed_penalty_msat(&self, half_life: Duration) -> u64 {
self.last_updated.elapsed().as_secs()
.checked_div(half_life.as_secs())
.and_then(|decays| self.undecayed_penalty_msat.checked_shr(decays as u32))
.unwrap_or(0)
}
}
impl<T: Time> Default for ScorerUsingTime<T> {
fn default() -> Self {
Self::new(ScoringParameters::default())
}
}
impl Default for ScoringParameters {
fn default() -> Self {
Self {
base_penalty_msat: 500,
failure_penalty_msat: 1024 * 1000,
failure_penalty_half_life: Duration::from_secs(3600),
overuse_penalty_start_1024th: 1024 / 8,
overuse_penalty_msat_per_1024th: 20,
}
}
}
impl<T: Time> Score for ScorerUsingTime<T> {
fn channel_penalty_msat(
&self, short_channel_id: u64, _source: &NodeId, _target: &NodeId, usage: ChannelUsage
) -> u64 {
let failure_penalty_msat = self.channel_failures
.get(&short_channel_id)
.map_or(0, |value| value.decayed_penalty_msat(self.params.failure_penalty_half_life));
let mut penalty_msat = self.params.base_penalty_msat + failure_penalty_msat;
let send_amt_msat = usage.amount_msat;
let capacity_msat = usage.effective_capacity.as_msat()
.saturating_sub(usage.inflight_htlc_msat);
let send_1024ths = send_amt_msat.checked_mul(1024).unwrap_or(u64::max_value()) / capacity_msat;
if send_1024ths > self.params.overuse_penalty_start_1024th as u64 {
penalty_msat = penalty_msat.checked_add(
(send_1024ths - self.params.overuse_penalty_start_1024th as u64)
.checked_mul(self.params.overuse_penalty_msat_per_1024th).unwrap_or(u64::max_value()))
.unwrap_or(u64::max_value());
}
penalty_msat
}
fn payment_path_failed(&mut self, _path: &[&RouteHop], short_channel_id: u64) {
let failure_penalty_msat = self.params.failure_penalty_msat;
let half_life = self.params.failure_penalty_half_life;
self.channel_failures
.entry(short_channel_id)
.and_modify(|failure| failure.add_penalty(failure_penalty_msat, half_life))
.or_insert_with(|| ChannelFailure::new(failure_penalty_msat));
}
fn payment_path_successful(&mut self, path: &[&RouteHop]) {
let half_life = self.params.failure_penalty_half_life;
for hop in path.iter() {
self.channel_failures
.entry(hop.short_channel_id)
.and_modify(|failure| failure.reduce_penalty(half_life));
}
}
}
impl<T: Time> Writeable for ScorerUsingTime<T> {
#[inline]
fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
self.params.write(w)?;
self.channel_failures.write(w)?;
write_tlv_fields!(w, {});
Ok(())
}
}
impl<T: Time> Readable for ScorerUsingTime<T> {
#[inline]
fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
let res = Ok(Self {
params: Readable::read(r)?,
channel_failures: Readable::read(r)?,
});
read_tlv_fields!(r, {});
res
}
}
impl<T: Time> Writeable for ChannelFailure<T> {
#[inline]
fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
let duration_since_epoch = T::duration_since_epoch() - self.last_updated.elapsed();
write_tlv_fields!(w, {
(0, self.undecayed_penalty_msat, required),
(2, duration_since_epoch, required),
});
Ok(())
}
}
impl<T: Time> Readable for ChannelFailure<T> {
#[inline]
fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
let mut undecayed_penalty_msat = 0;
let mut duration_since_epoch = Duration::from_secs(0);
read_tlv_fields!(r, {
(0, undecayed_penalty_msat, required),
(2, duration_since_epoch, required),
});
Ok(Self {
undecayed_penalty_msat,
last_updated: T::now() - (T::duration_since_epoch() - duration_since_epoch),
})
}
}
/// [`Score`] implementation using channel success probability distributions. /// [`Score`] implementation using channel success probability distributions.
/// ///
/// Based on *Optimally Reliable & Cheap Payment Flows on the Lightning Network* by Rene Pickhardt /// Based on *Optimally Reliable & Cheap Payment Flows on the Lightning Network* by Rene Pickhardt
@ -1363,7 +1114,7 @@ impl<T: Time> Readable for ChannelLiquidity<T> {
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
use super::{ChannelLiquidity, ProbabilisticScoringParameters, ProbabilisticScorerUsingTime, ScoringParameters, ScorerUsingTime}; use super::{ChannelLiquidity, ProbabilisticScoringParameters, ProbabilisticScorerUsingTime};
use util::time::Time; use util::time::Time;
use util::time::tests::SinceEpoch; use util::time::tests::SinceEpoch;
@ -1372,7 +1123,7 @@ mod tests {
use routing::scoring::{ChannelUsage, Score}; use routing::scoring::{ChannelUsage, Score};
use routing::network_graph::{EffectiveCapacity, NetworkGraph, NodeId}; use routing::network_graph::{EffectiveCapacity, NetworkGraph, NodeId};
use routing::router::RouteHop; use routing::router::RouteHop;
use util::ser::{Readable, ReadableArgs, Writeable}; use util::ser::{ReadableArgs, Writeable};
use util::test_utils::TestLogger; use util::test_utils::TestLogger;
use bitcoin::blockdata::constants::genesis_block; use bitcoin::blockdata::constants::genesis_block;
@ -1383,9 +1134,6 @@ mod tests {
use core::time::Duration; use core::time::Duration;
use io; use io;
/// A scorer for testing with time that can be manually advanced.
type Scorer = ScorerUsingTime::<SinceEpoch>;
fn source_privkey() -> SecretKey { fn source_privkey() -> SecretKey {
SecretKey::from_slice(&[42; 32]).unwrap() SecretKey::from_slice(&[42; 32]).unwrap()
} }
@ -1412,275 +1160,6 @@ mod tests {
NodeId::from_pubkey(&target_pubkey()) NodeId::from_pubkey(&target_pubkey())
} }
#[test]
fn penalizes_without_channel_failures() {
let scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 1_000,
failure_penalty_msat: 512,
failure_penalty_half_life: Duration::from_secs(1),
overuse_penalty_start_1024th: 1024,
overuse_penalty_msat_per_1024th: 0,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1, inflight_htlc_msat: 0, effective_capacity: EffectiveCapacity::Unknown
};
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
SinceEpoch::advance(Duration::from_secs(1));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
}
#[test]
fn accumulates_channel_failure_penalties() {
let mut scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 1_000,
failure_penalty_msat: 64,
failure_penalty_half_life: Duration::from_secs(10),
overuse_penalty_start_1024th: 1024,
overuse_penalty_msat_per_1024th: 0,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1, inflight_htlc_msat: 0, effective_capacity: EffectiveCapacity::Unknown
};
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_064);
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_128);
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_192);
}
#[test]
fn decays_channel_failure_penalties_over_time() {
let mut scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 1_000,
failure_penalty_msat: 512,
failure_penalty_half_life: Duration::from_secs(10),
overuse_penalty_start_1024th: 1024,
overuse_penalty_msat_per_1024th: 0,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1, inflight_htlc_msat: 0, effective_capacity: EffectiveCapacity::Unknown
};
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_512);
SinceEpoch::advance(Duration::from_secs(9));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_512);
SinceEpoch::advance(Duration::from_secs(1));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_256);
SinceEpoch::advance(Duration::from_secs(10 * 8));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_001);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
}
#[test]
fn decays_channel_failure_penalties_without_shift_overflow() {
let mut scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 1_000,
failure_penalty_msat: 512,
failure_penalty_half_life: Duration::from_secs(10),
overuse_penalty_start_1024th: 1024,
overuse_penalty_msat_per_1024th: 0,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1, inflight_htlc_msat: 0, effective_capacity: EffectiveCapacity::Unknown
};
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_512);
// An unchecked right shift 64 bits or more in ChannelFailure::decayed_penalty_msat would
// cause an overflow.
SinceEpoch::advance(Duration::from_secs(10 * 64));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
}
#[test]
fn accumulates_channel_failure_penalties_after_decay() {
let mut scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 1_000,
failure_penalty_msat: 512,
failure_penalty_half_life: Duration::from_secs(10),
overuse_penalty_start_1024th: 1024,
overuse_penalty_msat_per_1024th: 0,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1, inflight_htlc_msat: 0, effective_capacity: EffectiveCapacity::Unknown
};
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_512);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_256);
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_768);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_384);
}
#[test]
fn reduces_channel_failure_penalties_after_success() {
let mut scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 1_000,
failure_penalty_msat: 512,
failure_penalty_half_life: Duration::from_secs(10),
overuse_penalty_start_1024th: 1024,
overuse_penalty_msat_per_1024th: 0,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1, inflight_htlc_msat: 0, effective_capacity: EffectiveCapacity::Unknown
};
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_000);
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_512);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_256);
let hop = RouteHop {
pubkey: PublicKey::from_slice(target.as_slice()).unwrap(),
node_features: NodeFeatures::known(),
short_channel_id: 42,
channel_features: ChannelFeatures::known(),
fee_msat: 1,
cltv_expiry_delta: 18,
};
scorer.payment_path_successful(&[&hop]);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_128);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_064);
}
#[test]
fn restores_persisted_channel_failure_penalties() {
let mut scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 1_000,
failure_penalty_msat: 512,
failure_penalty_half_life: Duration::from_secs(10),
overuse_penalty_start_1024th: 1024,
overuse_penalty_msat_per_1024th: 0,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1, inflight_htlc_msat: 0, effective_capacity: EffectiveCapacity::Unknown
};
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_512);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_256);
scorer.payment_path_failed(&[], 43);
assert_eq!(scorer.channel_penalty_msat(43, &source, &target, usage), 1_512);
let mut serialized_scorer = Vec::new();
scorer.write(&mut serialized_scorer).unwrap();
let deserialized_scorer = <Scorer>::read(&mut io::Cursor::new(&serialized_scorer)).unwrap();
assert_eq!(deserialized_scorer.channel_penalty_msat(42, &source, &target, usage), 1_256);
assert_eq!(deserialized_scorer.channel_penalty_msat(43, &source, &target, usage), 1_512);
}
#[test]
fn decays_persisted_channel_failure_penalties() {
let mut scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 1_000,
failure_penalty_msat: 512,
failure_penalty_half_life: Duration::from_secs(10),
overuse_penalty_start_1024th: 1024,
overuse_penalty_msat_per_1024th: 0,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1, inflight_htlc_msat: 0, effective_capacity: EffectiveCapacity::Unknown
};
scorer.payment_path_failed(&[], 42);
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 1_512);
let mut serialized_scorer = Vec::new();
scorer.write(&mut serialized_scorer).unwrap();
SinceEpoch::advance(Duration::from_secs(10));
let deserialized_scorer = <Scorer>::read(&mut io::Cursor::new(&serialized_scorer)).unwrap();
assert_eq!(deserialized_scorer.channel_penalty_msat(42, &source, &target, usage), 1_256);
SinceEpoch::advance(Duration::from_secs(10));
assert_eq!(deserialized_scorer.channel_penalty_msat(42, &source, &target, usage), 1_128);
}
#[test]
fn charges_per_1024th_penalty() {
let scorer = Scorer::new(ScoringParameters {
base_penalty_msat: 0,
failure_penalty_msat: 0,
failure_penalty_half_life: Duration::from_secs(0),
overuse_penalty_start_1024th: 256,
overuse_penalty_msat_per_1024th: 100,
});
let source = source_node_id();
let target = target_node_id();
let usage = ChannelUsage {
amount_msat: 1_000,
inflight_htlc_msat: 0,
effective_capacity: EffectiveCapacity::Total { capacity_msat: 1_024_000 },
};
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 0);
let usage = ChannelUsage { amount_msat: 256_999, ..usage };
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 0);
let usage = ChannelUsage { amount_msat: 257_000, ..usage };
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 100);
let usage = ChannelUsage { amount_msat: 258_000, ..usage };
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 200);
let usage = ChannelUsage { amount_msat: 512_000, ..usage };
assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 256 * 100);
}
// `ProbabilisticScorer` tests // `ProbabilisticScorer` tests
/// A probabilistic scorer for testing with time that can be manually advanced. /// A probabilistic scorer for testing with time that can be manually advanced.