add v21 upgrade handler

app/app.go

@@ -69,14 +69,14 @@ import (
 	gaiaante "github.com/cosmos/gaia/v21/ante"
 	"github.com/cosmos/gaia/v21/app/keepers"
 	"github.com/cosmos/gaia/v21/app/upgrades"
-	v20 "github.com/cosmos/gaia/v21/app/upgrades/v20"
+	v21 "github.com/cosmos/gaia/v21/app/upgrades/v21"
 )
 
 var (
 	// DefaultNodeHome default home directories for the application daemon
 	DefaultNodeHome string
 
-	Upgrades = []upgrades.Upgrade{v20.Upgrade}
+	Upgrades = []upgrades.Upgrade{v21.Upgrade}
 )
 
 var (

app/upgrades/v21/constants.go

@@ -0,0 +1,15 @@
+package v21
+
+import (
+	"github.com/cosmos/gaia/v21/app/upgrades"
+)
+
+const (
+	// UpgradeName defines the on-chain upgrade name.
+	UpgradeName = "v21"
+)
+
+var Upgrade = upgrades.Upgrade{
+	UpgradeName:          UpgradeName,
+	CreateUpgradeHandler: CreateUpgradeHandler,
+}

app/upgrades/v21/upgrades.go

@@ -0,0 +1,31 @@
+package v21
+
+import (
+	"context"
+
+	upgradetypes "cosmossdk.io/x/upgrade/types"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+
+	"github.com/cosmos/gaia/v21/app/keepers"
+)
+
+func CreateUpgradeHandler(
+	mm *module.Manager,
+	configurator module.Configurator,
+	keepers *keepers.AppKeepers,
+) upgradetypes.UpgradeHandler {
+	return func(c context.Context, plan upgradetypes.Plan, vm module.VersionMap) (module.VersionMap, error) {
+		ctx := sdk.UnwrapSDKContext(c)
+		ctx.Logger().Info("Starting module migrations...")
+
+		vm, err := mm.RunMigrations(ctx, configurator, vm)
+		if err != nil {
+			return vm, err
+		}
+
+		ctx.Logger().Info("Upgrade v21 complete")
+		return vm, nil
+	}
+}