add v6 upgrade handlers

app/app.go

@@ -144,6 +144,7 @@ import (
 	v3 "github.com/Canto-Network/Canto/v6/app/upgrades/v3"
 	v4 "github.com/Canto-Network/Canto/v6/app/upgrades/v4"
 	v5 "github.com/Canto-Network/Canto/v6/app/upgrades/v5"
+	v6 "github.com/Canto-Network/Canto/v6/app/upgrades/v6"
 )
 
 func init() {
@@ -1104,6 +1105,8 @@ func (app *Canto) setupUpgradeHandlers() {
 		storeUpgrades = &storetypes.StoreUpgrades{
 			Added: []string{csrtypes.StoreKey},
 		}
+	case v6.UpgradeName:
+		// no store upgrades in v6
 	}
 
 	if storeUpgrades != nil {

app/upgrades/v6/constants.go

@@ -0,0 +1,6 @@
+package v6
+
+const (
+	//UpgradeName is the name of the upgrade to be associated with the chain upgrade
+	UpgradeName = "v6.0.0"
+)

app/upgrades/v6/upgrades.go

@@ -0,0 +1,21 @@
+package v6
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
+)
+
+// CreateUpgradeHandler creates an SDK upgrade handler for v6
+func CreateUpgradeHandler(
+	mm *module.Manager,
+	configurator module.Configurator,
+) upgradetypes.UpgradeHandler {
+	return func(ctx sdk.Context, _ upgradetypes.Plan, vm module.VersionMap) (module.VersionMap, error) {
+		logger := ctx.Logger().With("upgrade: ", UpgradeName)
+
+		// Leave modules are as-is to avoid running InitGenesis.
+		logger.Debug("running module migrations ...")
+		return mm.RunMigrations(ctx, configurator, vm)
+	}
+}