github.com/linapex/ethereum-go-chinese@v0.0.0-20190316121929-f8b7a73c3fa1/core/state/sync.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 19:16:35</date>
    10  //</624450080518180864>
    11  
    12  
    13  package state
    14  
    15  import (
    16  	"bytes"
    17  
    18  	"github.com/ethereum/go-ethereum/common"
    19  	"github.com/ethereum/go-ethereum/rlp"
    20  	"github.com/ethereum/go-ethereum/trie"
    21  )
    22  
    23  //newstatesync创建新的状态trie下载计划程序。
    24  func NewStateSync(root common.Hash, database trie.DatabaseReader) *trie.Sync {
    25  	var syncer *trie.Sync
    26  	callback := func(leaf []byte, parent common.Hash) error {
    27  		var obj Account
    28  		if err := rlp.Decode(bytes.NewReader(leaf), &obj); err != nil {
    29  			return err
    30  		}
    31  		syncer.AddSubTrie(obj.Root, 64, parent, nil)
    32  		syncer.AddRawEntry(common.BytesToHash(obj.CodeHash), 64, parent)
    33  		return nil
    34  	}
    35  	syncer = trie.NewSync(root, database, callback)
    36  	return syncer
    37  }
    38