From d24a9065846150ffc25322aacd894df5994164b2 Mon Sep 17 00:00:00 2001
From: Hans Moog <hm@mkjc.net>
Date: Mon, 29 Jul 2019 02:39:49 +0200
Subject: [PATCH] Feat: added formula to calculate mana of transfer
---
packages/mana/mana.go | 35 +++++++++++++++++++++++------------
packages/mana/mana_test.go | 12 +++++++-----
2 files changed, 30 insertions(+), 17 deletions(-)
diff --git a/packages/mana/mana.go b/packages/mana/mana.go
index a2706c74..d8f6b10a 100644
--- a/packages/mana/mana.go
+++ b/packages/mana/mana.go
@@ -1,28 +1,39 @@
package mana
-import "math"
+import (
+ "math"
+)
func CoinTimeDestroyed(transferredValue uint64, parkedTime uint64) uint64 {
return transferredValue * parkedTime
}
-func ErodedGains(gainsPerInterval uint64, elapsedIntervals uint64) uint64 {
- return uint64(float64(gainsPerInterval) * DECAY_FACTOR * (1 - math.Pow(DECAY_FACTOR, float64(elapsedIntervals))) / (1 - DECAY_FACTOR))
-}
+func ManaOfTransfer(value uint64, receivedTime uint64, spentTime uint64) (result uint64) {
+ firstIntervalDuration := DECAY_INTERVAL - receivedTime%DECAY_INTERVAL
+ lastIntervalDuration := spentTime % DECAY_INTERVAL
+ erosionCount := (spentTime - receivedTime) / DECAY_INTERVAL
+
+ gainsInFirstInterval := CoinTimeDestroyed(value, firstIntervalDuration)
+ gainsInLastInterval := CoinTimeDestroyed(value, lastIntervalDuration)
+ gainsPerConsecutiveInterval := CoinTimeDestroyed(value, DECAY_INTERVAL)
-func ManaOfTransfer(value uint64, parkedTime uint64) uint64 {
- fullErosionIntervals := parkedTime / DECAY_INTERVAL
+ scaleFactor := 1 - DECAY_RATE
- if fullErosionIntervals >= 1 {
- gainsPerInterval := CoinTimeDestroyed(value, DECAY_INTERVAL)
+ erodedGainsOfFirstInterval := uint64(float64(gainsInFirstInterval) * math.Pow(scaleFactor, float64(erosionCount)))
- return ErodedGains(gainsPerInterval, fullErosionIntervals) + CoinTimeDestroyed(value, (parkedTime-fullErosionIntervals*DECAY_INTERVAL))
- } else {
- return CoinTimeDestroyed(value, parkedTime)
+ var erodedGainsOfConsecutiveIntervals uint64
+ if erosionCount >= 1 {
+ erodedGainsOfConsecutiveIntervals = uint64(float64(gainsPerConsecutiveInterval) * scaleFactor * (1 - math.Pow(scaleFactor, float64(erosionCount-1))) / (1 - scaleFactor))
}
+
+ result += erodedGainsOfFirstInterval
+ result += erodedGainsOfConsecutiveIntervals
+ result += gainsInLastInterval
+
+ return
}
const (
DECAY_INTERVAL = 100
- DECAY_FACTOR = 0.9
+ DECAY_RATE = 0.5
)
diff --git a/packages/mana/mana_test.go b/packages/mana/mana_test.go
index 018bbea7..5e1eee80 100644
--- a/packages/mana/mana_test.go
+++ b/packages/mana/mana_test.go
@@ -6,9 +6,11 @@ import (
)
func TestManaOfTransfer(t *testing.T) {
- fmt.Println(ManaOfTransfer(50, 99))
- fmt.Println(ManaOfTransfer(50, 100))
- fmt.Println(ManaOfTransfer(50, 200))
- fmt.Println(ManaOfTransfer(50, 290))
- fmt.Println(ManaOfTransfer(50, 300))
+ fmt.Println(ManaOfTransfer(50, 10, 110))
+ fmt.Println(ManaOfTransfer(50, 0, 190))
+ fmt.Println(ManaOfTransfer(50, 0, 200))
+ fmt.Println(ManaOfTransfer(50, 0, 290))
+ fmt.Println(ManaOfTransfer(50, 0, 300))
+ fmt.Println(ManaOfTransfer(50, 0, 390))
+ fmt.Println(ManaOfTransfer(50, 0, 400))
}
--
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