Add the PoPCycle concept (#208)

* added reissuance details, the concept of popepochs and popcycles

Signed-off-by: Jürgen Eckel <juergen@riddleandcode.com>

x/dao/keeper/reissuance.go

@@ -1,19 +1,51 @@
 package keeper
 
 import (
+	"math"
 	"math/big"
 
 	"github.com/cosmos/cosmos-sdk/store/prefix"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/planetmint/planetmint-go/config"
 	"github.com/planetmint/planetmint-go/x/dao/types"
 )
 
-func GetReissuanceCommand(assetID string, _ int64) string {
+func GetPopNumber(blockHeight int64) float64 {
-	return "reissueasset " + assetID + " 998.69000000"
+	return float64(blockHeight) / float64(config.GetConfig().PoPEpochs)
 }
 
-func IsValidReissuanceCommand(reissuanceStr string, assetID string, _ int64) bool {
+var PopsPerCycle float64
-	expected := "reissueasset " + assetID + " 998.69000000"
+
+func init() {
+	PopsPerCycle = 1051200.0
+}
+
+func GetReissuanceAsStringValue(blockHeight int64) string {
+	PopNumber := GetPopNumber(blockHeight)
+	exactCycleID := PopNumber / PopsPerCycle
+
+	switch cycleID := math.Floor(exactCycleID); cycleID {
+	case 0:
+		return "998.69000000"
+	case 1:
+		return "499.34000000"
+	case 2:
+		return "249.67000000"
+	case 3:
+		return "124.83000000"
+	case 4:
+		return "62.42000000"
+	default:
+		return "0.0"
+	}
+}
+
+func GetReissuanceCommand(assetID string, blockHeight int64) string {
+	return "reissueasset " + assetID + " " + GetReissuanceAsStringValue(blockHeight)
+}
+
+func IsValidReissuanceCommand(reissuanceStr string, assetID string, blockHeight int64) bool {
+	expected := "reissueasset " + assetID + " " + GetReissuanceAsStringValue(blockHeight)
 	return reissuanceStr == expected
 }
 

x/dao/keeper/reissuance_test.go

@@ -4,20 +4,21 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/planetmint/planetmint-go/config"
 	keepertest "github.com/planetmint/planetmint-go/testutil/keeper"
 	"github.com/stretchr/testify/assert"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/planetmint/planetmint-go/x/dao/keeper"
+	daokeeper "github.com/planetmint/planetmint-go/x/dao/keeper"
 	"github.com/planetmint/planetmint-go/x/dao/types"
 )
 
-func createNReissuances(k *keeper.Keeper, ctx sdk.Context, n int) []types.Reissuance {
+func createNReissuances(k *daokeeper.Keeper, ctx sdk.Context, n int) []types.Reissuance {
 	items := make([]types.Reissuance, n)
 	for i := range items {
 		items[i].BlockHeight = int64(i)
 		items[i].Proposer = fmt.Sprintf("proposer_%v", i)
-		items[i].Rawtx = keeper.GetReissuanceCommand("asset_id", int64(i))
+		items[i].Rawtx = daokeeper.GetReissuanceCommand("asset_id", int64(i))
 		items[i].TxID = ""
 		k.StoreReissuance(ctx, items[i])
 	}
@@ -34,3 +35,14 @@ func TestGetReissuances(t *testing.T) {
 		assert.Equal(t, item, reissuance)
 	}
 }
+
+func TestReissuanceValueComputation(t *testing.T) {
+	t.Parallel()
+	popsPerEpoch := float64(config.GetConfig().PoPEpochs)
+	assert.Equal(t, "998.69000000", daokeeper.GetReissuanceAsStringValue(1))
+	assert.Equal(t, "499.34000000", daokeeper.GetReissuanceAsStringValue(int64(daokeeper.PopsPerCycle*popsPerEpoch*1+1)))
+	assert.Equal(t, "249.67000000", daokeeper.GetReissuanceAsStringValue(int64(daokeeper.PopsPerCycle*popsPerEpoch*2+1)))
+	assert.Equal(t, "124.83000000", daokeeper.GetReissuanceAsStringValue(int64(daokeeper.PopsPerCycle*popsPerEpoch*3+1)))
+	assert.Equal(t, "62.42000000", daokeeper.GetReissuanceAsStringValue(int64(daokeeper.PopsPerCycle*popsPerEpoch*4+1)))
+	assert.Equal(t, "0.0", daokeeper.GetReissuanceAsStringValue(int64(daokeeper.PopsPerCycle*popsPerEpoch*5+1)))
+}