github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/core/state/sync.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package state
    19  
    20  import (
    21  	"bytes"
    22  
    23  	"github.com/AigarNetwork/aigar/common"
    24  	"github.com/AigarNetwork/aigar/ethdb"
    25  	"github.com/AigarNetwork/aigar/rlp"
    26  	"github.com/AigarNetwork/aigar/trie"
    27  )
    28  
    29  // NewStateSync create a new state trie download scheduler.
    30  func NewStateSync(root common.Hash, database ethdb.KeyValueReader, bloom *trie.SyncBloom) *trie.Sync {
    31  	var syncer *trie.Sync
    32  	callback := func(leaf []byte, parent common.Hash) error {
    33  		var obj Account
    34  		if err := rlp.Decode(bytes.NewReader(leaf), &obj); err != nil {
    35  			return err
    36  		}
    37  		syncer.AddSubTrie(obj.Root, 64, parent, nil)
    38  		syncer.AddRawEntry(common.BytesToHash(obj.CodeHash), 64, parent)
    39  		return nil
    40  	}
    41  	syncer = trie.NewSync(root, database, callback, bloom)
    42  	return syncer
    43  }