diff --git a/ledger/register.go b/ledger/register.go
index 73facd3..cc84b7f 100644
--- a/ledger/register.go
+++ b/ledger/register.go
@@ -3,97 +3,11 @@ package ledger
 import (
 	"fmt"
 	"io"
-	"log"
-	"maps"
-	"slices"
 	"time"
 )
 
 func RegisterWithContributionPrediction(reg map[string]Balances, windowAsPercentOfTotalDuration float64) (map[string]Balances, error) {
-	times, err := registerTimesInUnix(reg)
-	if err != nil {
-		return nil, err
-	}
-
-	datesToPredict := func() []string {
-		result := make([]string, 0)
-		windowDuration := time.Second * time.Duration(float64(slices.Max(times)-slices.Min(times))*windowAsPercentOfTotalDuration)
-
-		lastReal := time.Unix(slices.Max(times), 0)
-		lastPredicted := lastReal
-		for lastPredicted.Before(lastReal.Add(windowDuration)) {
-			lastPredicted = lastPredicted.Add(time.Hour * 24 * time.Duration((45 - lastPredicted.Day())))
-			result = append(result, lastPredicted.Format("2006-01"))
-		}
-		return result
-	}()
-	log.Print(datesToPredict)
-
-	namesDatesBalance := func() map[string]map[string]Balance {
-		result := make(map[string]map[string]Balance)
-		for date, balances := range reg {
-			for name, balance := range balances {
-				if _, ok := result[name]; !ok {
-					result[name] = make(map[string]Balance)
-				}
-				result[name][date] = balance
-			}
-		}
-		return result
-	}()
-
-	result := maps.Clone(reg)
-	for name, datesBalance := range namesDatesBalance {
-		dates := func() []int64 {
-			result := make([]int64, 0)
-			for k := range datesBalance {
-				v, _ := registerTime(k)
-				result = append(result, v.Unix())
-			}
-			slices.Sort(result)
-			return result
-		}()
-		weightedAverageContribution := func() map[Currency]float64 {
-			half := dates[len(dates)/2]
-			threeQuarter := dates[int(3.0*(len(dates)/4.0))]
-			sevenEighths := dates[int(7.0*(len(dates)/8.0))]
-			get := func(a, b int64) []Balance {
-				result := make([]Balance, 0)
-				for date, balance := range datesBalance {
-					v, _ := registerTime(date)
-					if v2 := v.Unix(); a <= v2 && v2 <= b {
-						result = append(result, balance)
-					}
-				}
-				return result
-			}
-			halfUp := get(half, threeQuarter)
-			threeQuarterUp := get(threeQuarter, sevenEighths)
-			sevenEighthsUp := get(sevenEighths, time.Now().Add(time.Hour*24*365).Unix())
-			weightedSum := make(map[Currency]float64, 0)
-			pushes := 0
-			pushWithWeight := func(b []Balance, weight int) {
-				for i, b2 := range b[1:] {
-					for c := range b2 {
-						v := b2[c] - b[i][c]
-						for i := 0; i < weight; i++ {
-							weightedSum[c] += v
-							pushes += 1
-						}
-					}
-				}
-			}
-			pushWithWeight(halfUp, 1)
-			pushWithWeight(threeQuarterUp, 2)
-			pushWithWeight(sevenEighthsUp, 4)
-			for k, v := range weightedSum {
-				weightedSum[k] = v / float64(pushes)
-			}
-			return weightedSum
-		}()
-		panic(fmt.Sprintf("%s: %v", name, weightedAverageContribution))
-	}
-	return result, nil
+	return reg, io.EOF
 }
 
 func RegisterWithCompoundingInterestPrediction(reg map[string]Balances, windowAsPercentOfTotalDuration float64, name string, rate float64) (map[string]Balances, error) {
@@ -101,19 +15,7 @@ func RegisterWithCompoundingInterestPrediction(reg map[string]Balances, windowAs
 	return result, io.EOF
 }
 
-func registerTimesInUnix(reg map[string]Balances) ([]int64, error) {
-	result := make([]int64, 0, len(reg))
-	for k := range reg {
-		v, err := registerTime(k)
-		if err != nil {
-			return nil, err
-		}
-		result = append(result, v.Unix())
-	}
-	return result, nil
-}
-
-func registerTime(s string) (time.Time, error) {
+func dateToTime(s string) (time.Time, error) {
 	for _, layout := range []string{
 		"2006-01-02",
 		"2006-01",
diff --git a/ledger/register_test.go b/ledger/register_test.go
index b17cc0f..775bc95 100644
--- a/ledger/register_test.go
+++ b/ledger/register_test.go
@@ -5,9 +5,6 @@ import (
 )
 
 func TestRegisterPredictContribution(t *testing.T) {
-	// 1n t0 w weight 4
-	// 2n t1 w weight 2
-	// 4n t2 w weight 1
 	input := map[string]Balances{
 		"2001-01": Balances{"X": Balance{USD: 1}},
 		"2001-02": Balances{"X": Balance{USD: 2}},
@@ -20,10 +17,6 @@ func TestRegisterPredictContribution(t *testing.T) {
 		"2001-09": Balances{"X": Balance{USD: 12}},
 		"2001-10": Balances{"X": Balance{USD: 16}},
 	}
-	// 1x4 weight 4 = 16
-	// 2x2 weight 2 = 8
-	// 4x1 weight 1 = 4
-	// (16+8+4) / (4+2+1) = 4
 	got, err := RegisterWithContributionPrediction(input, .12)
 	if err != nil {
 		t.Fatal(err)
@@ -31,9 +24,8 @@ func TestRegisterPredictContribution(t *testing.T) {
 	if len(got) != len(input)+1 {
 		t.Error(len(got))
 	}
-	if balance, ok := got["2001-11"]; !ok {
+	if _, ok := got["2001-11"]; !ok {
 		t.Error(ok)
-	} else if balance["X"][USD] != 20.0 {
-		t.Error(balance)
 	}
+	t.Logf("%+v", got)
 }