+
+ #[test]
+ fn adds_anti_probing_penalty() {
+ let logger = TestLogger::new();
+ let network_graph = network_graph(&logger);
+ let source = source_node_id();
+ let target = target_node_id();
+ let params = ProbabilisticScoringParameters {
+ anti_probing_penalty_msat: 500,
+ ..ProbabilisticScoringParameters::zero_penalty()
+ };
+ let scorer = ProbabilisticScorer::new(params, &network_graph, &logger);
+
+ // Check we receive no penalty for a low htlc_maximum_msat.
+ let usage = ChannelUsage {
+ amount_msat: 512_000,
+ inflight_htlc_msat: 0,
+ effective_capacity: EffectiveCapacity::Total { capacity_msat: 1_024_000, htlc_maximum_msat: Some(1_000) },
+ };
+ assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 0);
+
+ // Check we receive anti-probing penalty for htlc_maximum_msat == channel_capacity.
+ let usage = ChannelUsage {
+ amount_msat: 512_000,
+ inflight_htlc_msat: 0,
+ effective_capacity: EffectiveCapacity::Total { capacity_msat: 1_024_000, htlc_maximum_msat: Some(1_024_000) },
+ };
+ assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 500);
+
+ // Check we receive anti-probing penalty for htlc_maximum_msat == channel_capacity/2.
+ let usage = ChannelUsage {
+ amount_msat: 512_000,
+ inflight_htlc_msat: 0,
+ effective_capacity: EffectiveCapacity::Total { capacity_msat: 1_024_000, htlc_maximum_msat: Some(512_000) },
+ };
+ assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 500);
+
+ // Check we receive no anti-probing penalty for htlc_maximum_msat == channel_capacity/2 - 1.
+ let usage = ChannelUsage {
+ amount_msat: 512_000,
+ inflight_htlc_msat: 0,
+ effective_capacity: EffectiveCapacity::Total { capacity_msat: 1_024_000, htlc_maximum_msat: Some(511_999) },
+ };
+ assert_eq!(scorer.channel_penalty_msat(42, &source, &target, usage), 0);
+ }