feat: add v4 upgrade plan

app/upgrade.go

@@ -9,13 +9,15 @@ import (
 	v200 "github.com/irisnet/irishub/v4/app/upgrades/v200"
 	v210 "github.com/irisnet/irishub/v4/app/upgrades/v210"
 	v300 "github.com/irisnet/irishub/v4/app/upgrades/v300"
+	v400 "github.com/irisnet/irishub/v4/app/upgrades/v400"
 )
 
 var (
 	router = upgrades.NewUpgradeRouter().
 		Register(v200.Upgrade).
 		Register(v210.Upgrade).
-		Register(v300.Upgrade)
+		Register(v300.Upgrade).
+		Register(v400.Upgrade)
 )
 
 // RegisterUpgradePlans register a handler of upgrade plan

app/upgrades/v400/upgrades.go

@@ -0,0 +1,31 @@
+package v400
+
+import (
+	"context"
+
+	storetypes "cosmossdk.io/store/types"
+	upgradetypes "cosmossdk.io/x/upgrade/types"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+
+	"github.com/irisnet/irishub/v4/app/upgrades"
+)
+
+// Upgrade defines a struct containing necessary fields that a SoftwareUpgradeProposal
+var Upgrade = upgrades.Upgrade{
+	UpgradeName:               "v4.0.0",
+	UpgradeHandlerConstructor: upgradeHandlerConstructor,
+	StoreUpgrades: &storetypes.StoreUpgrades{},
+}
+
+func upgradeHandlerConstructor(
+	m *module.Manager,
+	c module.Configurator,
+	box upgrades.Toolbox,
+) upgradetypes.UpgradeHandler {
+	return func(context context.Context, _ upgradetypes.Plan, fromVM module.VersionMap) (module.VersionMap, error) {
+		ctx := sdk.UnwrapSDKContext(context)
+		ctx.Logger().Info("execute a upgrade plan...")
+		return box.ModuleManager.RunMigrations(ctx, c, fromVM)
+	}
+}