use a global for ModuleManager so we can access it

app/app.go

@@ -188,17 +188,19 @@ var (
 // capabilities aren't needed for testing.
 type App struct {
 	*baseapp.BaseApp
-	keepers.AppKeepers
-
-	cdc               *codec.LegacyAmino
+	legacyAmino       *codec.LegacyAmino
 	appCodec          codec.Codec
+	txConfig          client.TxConfig
 	interfaceRegistry types.InterfaceRegistry
 
-	invCheckPeriod uint
-
 	// the module manager
-	mm *module.Manager
+	ModuleManager *module.Manager
+
+	// simulation manager
 	sm *module.SimulationManager
+
+	// module configurator
+	configurator module.Configurator
 }
 
 // New returns a reference to an initialized Juno.

app/export.go

@@ -15,9 +15,7 @@ import (
 
 // ExportAppStateAndValidators exports the state of the application for a genesis
 // file.
-func (app *App) ExportAppStateAndValidators(
-	forZeroHeight bool, jailAllowedAddrs []string,
-) (servertypes.ExportedApp, error) {
+func (app *App) ExportAppStateAndValidators(forZeroHeight bool, jailAllowedAddrs []string, modulesToExport []string) (servertypes.ExportedApp, error) {
 	// as if they could withdraw from the start of the next block
 	ctx := app.NewContext(true, tmproto.Header{Height: app.LastBlockHeight()})
 
@@ -29,22 +27,19 @@ func (app *App) ExportAppStateAndValidators(
 		app.prepForZeroHeightGenesis(ctx, jailAllowedAddrs)
 	}
 
-	genState := app.mm.ExportGenesis(ctx, app.appCodec)
+	genState := app.ModuleManager.ExportGenesisForModules(ctx, app.appCodec, modulesToExport)
 	appState, err := json.MarshalIndent(genState, "", "  ")
 	if err != nil {
 		return servertypes.ExportedApp{}, err
 	}
 
 	validators, err := staking.WriteValidators(ctx, app.StakingKeeper)
-	if err != nil {
-		return servertypes.ExportedApp{}, err
-	}
 	return servertypes.ExportedApp{
 		AppState:        appState,
 		Validators:      validators,
 		Height:          height,
 		ConsensusParams: app.BaseApp.GetConsensusParams(ctx),
-	}, nil
+	}, err
 }
 
 // prepare for fresh start at zero height