feat!: Add object store (#25470)

Co-authored-by: yihuang <huang@crypto.com>
Co-authored-by: mmsqe <mavis@crypto.com>
Co-authored-by: mmsqe <tqd0800210105@gmail.com>
Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

baseapp/baseapp.go

@@ -283,6 +283,9 @@ func (app *BaseApp) MountStores(keys ...storetypes.StoreKey) {
 		case *storetypes.MemoryStoreKey:
 			app.MountStore(key, storetypes.StoreTypeMemory)
 
+		case *storetypes.ObjectStoreKey:
+			app.MountStore(key, storetypes.StoreTypeObject)
+
 		default:
 			panic(fmt.Sprintf("Unrecognized store key type :%T", key))
 		}
@@ -321,6 +324,16 @@ func (app *BaseApp) MountMemoryStores(keys map[string]*storetypes.MemoryStoreKey
 	}
 }
 
+// MountObjectStores mounts all transient object stores with the BaseApp's internal
+// commit multi-store.
+func (app *BaseApp) MountObjectStores(keys map[string]*storetypes.ObjectStoreKey) {
+	skeys := slices.Sorted(maps.Keys(keys))
+	for _, key := range skeys {
+		memKey := keys[key]
+		app.MountStore(memKey, storetypes.StoreTypeObject)
+	}
+}
+
 // MountStore mounts a store to the provided key in the BaseApp multistore,
 // using the default DB.
 func (app *BaseApp) MountStore(key storetypes.StoreKey, typ storetypes.StoreType) {

baseapp/baseapp_test.go

@@ -988,6 +988,25 @@ func TestGetEmptyConsensusParams(t *testing.T) {
 	require.Equal(t, uint64(0), suite.baseApp.GetMaximumBlockGas(ctx))
 }
 
+func TestMountStores(t *testing.T) {
+	logger := log.NewNopLogger()
+	db := dbm.NewMemDB()
+	name := t.Name()
+	app := baseapp.NewBaseApp(name, logger, db, nil)
+	kvKey := storetypes.NewKVStoreKey("kv")
+	transKey := storetypes.NewTransientStoreKey("trans")
+	memKey := storetypes.NewMemoryStoreKey("mem")
+	objKey := storetypes.NewObjectStoreKey("obj")
+	app.MountStores(kvKey, transKey, memKey, objKey)
+	objKey2 := storetypes.NewObjectStoreKey("obj2")
+	app.MountObjectStores(map[string]*storetypes.ObjectStoreKey{"obj2": objKey2})
+	require.NoError(t, app.LoadLatestVersion())
+	for _, keyName := range []storetypes.StoreKey{kvKey, transKey, memKey, objKey} {
+		require.NotNil(t, app.CommitMultiStore().GetStore(keyName))
+	}
+	require.NotNil(t, app.CommitMultiStore().GetStore(objKey2))
+}
+
 func TestLoadVersionPruning(t *testing.T) {
 	logger := log.NewNopLogger()
 	pruningOptions := pruningtypes.NewCustomPruningOptions(10, 15)