From 66627838a3431e1a82636fb5fb9377777c2c0047 Mon Sep 17 00:00:00 2001
From: Dennis Trautwein <git@dtrautwein.eu>
Date: Thu, 4 Aug 2022 10:47:51 +0200
Subject: [PATCH] chore: remove obsolete least square fit

---
 netsize/netsize.go | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/netsize/netsize.go b/netsize/netsize.go
index 3840a42f2..2fd6db809 100644
--- a/netsize/netsize.go
+++ b/netsize/netsize.go
@@ -34,7 +34,6 @@ type Estimator struct {
 	localID    kbucket.ID
 	rt         *kbucket.RoutingTable
 	bucketSize int
-	lsqConst   float64
 
 	measurementsLk sync.RWMutex
 	measurements   map[int][]measurement
@@ -49,17 +48,22 @@ func NewEstimator(localID peer.ID, rt *kbucket.RoutingTable, bucketSize int) *Es
 		measurements[i] = []measurement{}
 	}
 
-	k := float64(bucketSize)
-
 	return &Estimator{
 		localID:      kbucket.ConvertPeerID(localID),
 		rt:           rt,
 		bucketSize:   bucketSize,
 		measurements: measurements,
-		lsqConst:     k * (k + 1) * (2*k + 1) / 6.0,
 	}
 }
 
+// NormedDistance calculates the normed XOR distance of the given keys (from 0 to 1).
+func NormedDistance(p peer.ID, k ks.Key) float64 {
+	pKey := ks.XORKeySpace.Key([]byte(p))
+	ksDistance := new(big.Float).SetInt(pKey.Distance(k))
+	normedDist, _ := new(big.Float).Quo(ksDistance, keyspaceMaxFloat).Float64()
+	return normedDist
+}
+
 type measurement struct {
 	distance  float64
 	weight    float64
@@ -212,14 +216,6 @@ func (e *Estimator) calcWeight(key string) float64 {
 	return math.Pow(2, float64(bucketLevel-e.bucketSize))
 }
 
-// NormedDistance calculates the normed XOR distance of the given keys (from 0 to 1).
-func NormedDistance(p peer.ID, k ks.Key) float64 {
-	pKey := ks.XORKeySpace.Key([]byte(p))
-	ksDistance := new(big.Float).SetInt(pKey.Distance(k))
-	normedDist, _ := new(big.Float).Quo(ksDistance, keyspaceMaxFloat).Float64()
-	return normedDist
-}
-
 // garbageCollect removes all measurements from the list that fell out of the measurement time window.
 func (e *Estimator) garbageCollect() {
 	logger.Debug("Running garbage collection")