/
sync.go
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/
sync.go
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// Copyright 2015 The go-ethereum Authors
// This file is part of Ngin.
//
// Ngin is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Ngin is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Ngin. If not, see <http://www.gnu.org/licenses/>.
package state
import (
"bytes"
"math/big"
"github.com/NginProject/ngind/common"
"github.com/NginProject/ngind/ngindb"
"github.com/NginProject/ngind/rlp"
"github.com/NginProject/ngind/trie"
)
// NewStateSync create a new state trie download scheduler.
func NewStateSync(root common.Hash, database ngindb.Database) *trie.Sync {
var syncer *trie.Sync
callback := func(leaf []byte, parent common.Hash) error {
var obj struct {
Nonce uint64
Balance *big.Int
Root common.Hash
CodeHash []byte
}
if err := rlp.Decode(bytes.NewReader(leaf), &obj); err != nil {
return err
}
syncer.AddSubTrie(obj.Root, 64, parent, nil)
syncer.AddRawEntry(common.BytesToHash(obj.CodeHash), 64, parent)
return nil
}
syncer = trie.NewTrieSync(root, database, callback)
return syncer
}