github.com/xfond/eth-implementation@v1.8.9-0.20180514135602-f6bc65fc6811/core/state/sync.go (about) 1 // Copyright 2015 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 package state 18 19 import ( 20 "bytes" 21 22 "github.com/ethereum/go-ethereum/common" 23 "github.com/ethereum/go-ethereum/rlp" 24 "github.com/ethereum/go-ethereum/trie" 25 ) 26 27 // NewStateSync create a new state trie download scheduler. 28 func NewStateSync(root common.Hash, database trie.DatabaseReader) *trie.TrieSync { 29 var syncer *trie.TrieSync 30 callback := func(leaf []byte, parent common.Hash) error { 31 var obj Account 32 if err := rlp.Decode(bytes.NewReader(leaf), &obj); err != nil { 33 return err 34 } 35 syncer.AddSubTrie(obj.Root, 64, parent, nil) 36 syncer.AddRawEntry(common.BytesToHash(obj.CodeHash), 64, parent) 37 return nil 38 } 39 syncer = trie.NewTrieSync(root, database, callback) 40 return syncer 41 }