Denom migration from peggy1 to peggy2

x/tokenregistry/keeper/denom_mapping.go

@@ -0,0 +1,32 @@
+package keeper
+
+import (
+	"github.com/Sifchain/sifnode/x/tokenregistry/types"
+	"github.com/cosmos/cosmos-sdk/store/prefix"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+func (k keeper) getPeggy1DenomMappingPrefix(ctx sdk.Context, peggy1_denom string) []byte {
+	return append(types.Peggy1DenomMappingPrefix, []byte(peggy1_denom)...)
+}
+
+func (k keeper) GetPeggy2Denom(ctx sdk.Context, peggy1_denom string) (string, bool) {
+	denom_prefix := k.getPeggy1DenomMappingPrefix(ctx, peggy1_denom)
+
+	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.Peggy1DenomMappingPrefix)
+
+	b := store.Get(denom_prefix)
+
+	if b == nil {
+		return "", false
+	}
+	return string(b), true
+}
+
+func (k keeper) SetPeggy2Denom(ctx sdk.Context, peggy1_denom string, peggy2_denom string) {
+	denom_prefix := k.getPeggy1DenomMappingPrefix(ctx, peggy1_denom)
+
+	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.Peggy1DenomMappingPrefix)
+
+	store.Set(denom_prefix, []byte(peggy2_denom))
+}

x/tokenregistry/keeper/denom_mapping_test.go

@@ -0,0 +1,23 @@
+package keeper_test
+
+import (
+	"testing"
+
+	"github.com/Sifchain/sifnode/x/tokenregistry/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetPeggy2Denom(t *testing.T) {
+	app, ctx, _ := test.CreateTestApp(false)
+	peggy1Denom := "peggy1"
+	_, found := app.TokenRegistryKeeper.GetPeggy2Denom(ctx, peggy1Denom)
+	// not found before set
+	require.Equal(t, found, false)
+
+	peggy2Denom := "peggy2"
+	app.TokenRegistryKeeper.SetPeggy2Denom(ctx, peggy1Denom, peggy2Denom)
+	peggy2DenomInKeeper, found := app.TokenRegistryKeeper.GetPeggy2Denom(ctx, peggy1Denom)
+	// found after set
+	require.Equal(t, found, true)
+	require.Equal(t, peggy2Denom, peggy2DenomInKeeper)
+}

x/tokenregistry/keeper/keeper.go

@@ -2,6 +2,7 @@ package keeper
 
 import (
 	"fmt"
+
 	adminkeeper "github.com/Sifchain/sifnode/x/admin/keeper"
 	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"

x/tokenregistry/keeper/migrations.go

@@ -1,6 +1,10 @@
 package keeper
 
 import (
+	"encoding/json"
+	"io/ioutil"
+	"path/filepath"
+
 	tkrtypes "github.com/Sifchain/sifnode/x/tokenregistry/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
@@ -26,5 +30,31 @@ func (m Migrator) MigrateToVer4(ctx sdk.Context) error {
 		store.Delete(iterator.Key())
 	}
 
+	denomMigrationMap := getDenomMigrationMap()
+	for peggy1denom, peggy2denom := range denomMigrationMap {
+		m.Keeper.SetPeggy2Denom(ctx, peggy1denom, peggy2denom)
+	}
+
 	return nil
 }
+
+func getDenomMigrationMap() map[string]string {
+	migrationMap := map[string]string{}
+	input, err := ioutil.ReadFile(denomMigrationFilePath())
+	if err != nil {
+		panic(err)
+	}
+	err = json.Unmarshal(input, &migrationMap)
+	if err != nil {
+		panic(err)
+	}
+	return migrationMap
+}
+
+func denomMigrationFilePath() string {
+	fp, err := filepath.Abs("../../../smart-contracts/data/denom_mapping_peggy1_to_peggy2.json")
+	if err != nil {
+		panic(err)
+	}
+	return fp
+}

x/tokenregistry/types/expected_keepers.go

@@ -30,6 +30,8 @@ type Keeper interface {
 	SetFirstDoublePeg(ctx sdk.Context, denom string, networkDescriptor oracletypes.NetworkDescriptor)
 	AddMultipleTokens(ctx sdk.Context, entries []*RegistryEntry)
 	RemoveMultipleTokens(ctx sdk.Context, denoms []string)
+	GetPeggy2Denom(ctx sdk.Context, peggy1_denom string) (string, bool)
+	SetPeggy2Denom(ctx sdk.Context, peggy1_denom string, peggy2_denom string)
 }
 
 type AccountKeeper interface {

x/tokenregistry/types/keys.go

@@ -3,3 +3,4 @@ package types
 var WhitelistStorePrefix = []byte{0x01}
 var AdminAccountStorePrefix = []byte{0x02} // no longer used
 var TokenDenomPrefix = []byte{0x03}
+var Peggy1DenomMappingPrefix = []byte{0x04}