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routing: use distinct probability estimation for local channels

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Previously we used the a priori probability also for our own untried
channels. This led to local channels that had seen a success already
being prioritized over untried local channels. In some cases, depending
on the configured payment attempt cost, this could lead to the payment
taking a two hop route while a direct payment was also possible.
This commit is contained in:
Joost Jager
2019-11-07 11:24:38 +01:00
parent 5a80c3459f
commit dc0399af51
4 changed files with 35 additions and 2 deletions
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16
routing/probability_estimator.go
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@ -123,6 +123,22 @@ func (p *probabilityEstimator) getPairProbability(
)
}
// getLocalPairProbability estimates the probability of successfully traversing
// our own local channels to toNode.
func (p *probabilityEstimator) getLocalPairProbability(
now time.Time, results NodeResults, toNode route.Vertex) float64 {
// For local channels that have never been tried before, we assume them
// to be successful. We have accurate balance and online status
// information on our own channels, so when we select them in a route it
// is close to certain that those channels will work.
nodeProbability := p.prevSuccessProbability
return p.calculateProbability(
now, results, nodeProbability, toNode, lnwire.MaxMilliSatoshi,
)
}
// calculateProbability estimates the probability of successfully traversing to
// toNode based on historical payment outcomes and a fall-back node probability.
func (p *probabilityEstimator) calculateProbability(