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routing: track amt ranges in mc

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This commit is contained in:
Joost Jager
2019-09-26 17:04:02 +02:00
parent 62f8cca75b
commit cdf1aa5bc1
8 changed files with 320 additions and 229 deletions
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22
routing/probability_estimator.go
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@ -80,19 +80,20 @@ func (p *probabilityEstimator) getNodeProbability(now time.Time,
totalWeight := aprioriFactor
for _, result := range results {
age := now.Sub(result.Timestamp)
switch {
// Weigh success with a constant high weight of 1. There is no
// decay.
case result.Success:
// decay. Amt is never zero, so this clause is never executed
// when result.SuccessAmt is zero.
case amt <= result.SuccessAmt:
totalWeight++
probabilitiesTotal += p.prevSuccessProbability
// Weigh failures in accordance with their age. The base
// probability of a failure is considered zero, so nothing needs
// to be added to probabilitiesTotal.
case amt >= result.Amt:
case !result.FailTime.IsZero() && amt >= result.FailAmt:
age := now.Sub(result.FailTime)
totalWeight += p.getWeight(age)
}
}
@ -155,9 +156,10 @@ func (p *probabilityEstimator) calculateProbability(
return nodeProbability
}
// For successes, we have a fixed (high) probability. Those pairs
// will be assumed good until proven otherwise.
if lastPairResult.Success {
// For successes, we have a fixed (high) probability. Those pairs will
// be assumed good until proven otherwise. Amt is never zero, so this
// clause is never executed when lastPairResult.SuccessAmt is zero.
if amt <= lastPairResult.SuccessAmt {
return p.prevSuccessProbability
}
@ -166,11 +168,11 @@ func (p *probabilityEstimator) calculateProbability(
// penalization. If the current amount is smaller than the amount that
// previously triggered a failure, we act as if this is an untried
// channel.
if amt < lastPairResult.Amt {
if lastPairResult.FailTime.IsZero() || amt < lastPairResult.FailAmt {
return nodeProbability
}
timeSinceLastFailure := now.Sub(lastPairResult.Timestamp)
timeSinceLastFailure := now.Sub(lastPairResult.FailTime)
// Calculate success probability based on the weight of the last
// failure. When the failure is fresh, its weight is 1 and we'll return