Problem: contract migration in upgrade (#1428)

* Problem: contract migration in upgrade

* cleanup

* cleanup

* padding

* cleanup

app/upgrades.go

@@ -2,24 +2,49 @@ package app
 
 import (
 	"fmt"
+	"math/big"
 
 	"github.com/cosmos/cosmos-sdk/codec"
 	storetypes "github.com/cosmos/cosmos-sdk/store/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
 	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
 	clientkeeper "github.com/cosmos/ibc-go/v7/modules/core/02-client/keeper"
+	"github.com/ethereum/go-ethereum/common"
 
 	e2eetypes "github.com/crypto-org-chain/cronos/v2/x/e2ee/types"
 )
 
+type contractMigration struct {
+	Contract common.Address
+	Slot     common.Hash
+	Value    common.Hash
+}
+
+// ContractMigrations records the list of contract migrations, chain-id -> migrations
+var ContractMigrations = map[string][]contractMigration{
+	"cronostestnet_338-3": {
+		{
+			Contract: common.HexToAddress("0x6265bf2371ccf45767184c8bd77b5c52e752c2bb"),
+			Slot:     common.BigToHash(big.NewInt(0)),
+			Value:    common.HexToHash("0x000000000000000000000000730CbB94480d50788481373B43d83133e171367e"),
+		},
+	},
+}
+
 func (app *App) RegisterUpgradeHandlers(cdc codec.BinaryCodec, clientKeeper clientkeeper.Keeper) {
 	planName := "v1.3"
 	app.UpgradeKeeper.SetUpgradeHandler(planName, func(ctx sdk.Context, _ upgradetypes.Plan, fromVM module.VersionMap) (module.VersionMap, error) {
 		m, err := app.mm.RunMigrations(ctx, app.configurator, fromVM)
 		if err != nil {
 			return m, err
 		}
+
+		// migrate contract states
+		for _, migration := range ContractMigrations[ctx.ChainID()] {
+			app.EvmKeeper.SetState(ctx, migration.Contract, migration.Slot, migration.Value.Bytes())
+		}
+
 		return m, nil
 	})