How to sync trie data to leveldb about go-ethereum HOT 2 CLOSED

package main

import (
	"strconv"

	"github.com/ethereum/go-ethereum/core/rawdb"
	"github.com/ethereum/go-ethereum/trie"
	"github.com/ethereum/go-ethereum/triedb"
	
)

func f() {
	dir := "./data"
	db, err := rawdb.NewLevelDBDatabase(dir, 16, 16, "leveldb", false)
	if err != nil {
		panic(err)
	}
	defer db.Close()

	tdb := triedb.NewDatabase(db, triedb.HashDefaults)
	mpt := trie.NewEmpty(tdb)

	for i := 0; i < 100_0000; i++ {
		mpt.MustUpdate([]byte(strconv.Itoa(i)), []byte(strconv.Itoa(i)))
	}
	root, nodes, err = mpt.Commit(true)
	if err != nil {
		panic(err)
	}
	tdb.Update(root, types.EmptyRootHash, trienode.NewWithNodeSet(nodes))
	tdb.Commit(root)
}

func main() {
	f()
}