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routing: add capacity to special edges

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Having a capacity available is important for liquidity estimation.

* We add a dummy capacity to hop hints. Hop hints specify neither the
  capacity nor a maxHTLC size, which is why we assume the channel to
  have a high capacity relative to the amount we send.

* We add a capacity to local edges. These channels should always have a
  capacity associated with them, even in the neutrino case (a fallback
  to maxHTLC is not necessary). This is just for completeness, as the
  probability calculation for local channels is done separately.
This commit is contained in:
bitromortac
2023-03-15 16:30:50 +01:00
parent b6d65752f7
commit 7df1482cfc
3 changed files with 25 additions and 5 deletions
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9
routing/probability_bimodal.go
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@@ -28,9 +28,12 @@ const (
// the timescale of about a week.
DefaultBimodalDecayTime = 7 * 24 * time.Hour
// BimodalScaleMsatLimit is the maximum value for BimodalScaleMsat to
// avoid numerical issues.
BimodalScaleMsatMax = lnwire.MilliSatoshi(21e17)
// BimodalScaleMsatMax is the maximum value for BimodalScaleMsat. We
// limit it here to the fakeHopHintCapacity to avoid issues with hop
// hint probability calculations.
BimodalScaleMsatMax = lnwire.MilliSatoshi(
1000 * fakeHopHintCapacity / 4,
)
// BimodalEstimatorName is used to identify the bimodal estimator.
BimodalEstimatorName = "bimodal"