mirror of https://github.com/poanetwork/quorum.git
99 lines
2.8 KiB
Go
99 lines
2.8 KiB
Go
// Copyright 2015 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library 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.
|
|
//
|
|
// The go-ethereum library 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 the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package state
|
|
|
|
import (
|
|
"bytes"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/crypto/sha3"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
"github.com/ethereum/go-ethereum/trie"
|
|
)
|
|
|
|
type StateSync struct {
|
|
db ethdb.Database
|
|
sync *trie.TrieSync
|
|
codeReqs map[common.Hash]struct{} // requested but not yet written to database
|
|
codeReqList []common.Hash // requested since last Missing
|
|
}
|
|
|
|
var sha3_nil = common.BytesToHash(sha3.NewKeccak256().Sum(nil))
|
|
|
|
func NewStateSync(root common.Hash, db ethdb.Database) *StateSync {
|
|
ss := &StateSync{
|
|
db: db,
|
|
codeReqs: make(map[common.Hash]struct{}),
|
|
}
|
|
ss.codeReqs[sha3_nil] = struct{}{} // never request the nil hash
|
|
ss.sync = trie.NewTrieSync(root, db, ss.leafFound)
|
|
return ss
|
|
}
|
|
|
|
func (self *StateSync) leafFound(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
|
|
}
|
|
self.sync.AddSubTrie(obj.Root, 64, parent, nil)
|
|
|
|
codehash := common.BytesToHash(obj.CodeHash)
|
|
if _, ok := self.codeReqs[codehash]; !ok {
|
|
code, _ := self.db.Get(obj.CodeHash)
|
|
if code == nil {
|
|
self.codeReqs[codehash] = struct{}{}
|
|
self.codeReqList = append(self.codeReqList, codehash)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (self *StateSync) Missing(max int) []common.Hash {
|
|
cr := len(self.codeReqList)
|
|
gh := 0
|
|
if max != 0 {
|
|
if cr > max {
|
|
cr = max
|
|
}
|
|
gh = max - cr
|
|
}
|
|
list := append(self.sync.Missing(gh), self.codeReqList[:cr]...)
|
|
self.codeReqList = self.codeReqList[cr:]
|
|
return list
|
|
}
|
|
|
|
func (self *StateSync) Process(list []trie.SyncResult) error {
|
|
for i := 0; i < len(list); i++ {
|
|
if _, ok := self.codeReqs[list[i].Hash]; ok { // code data, not a node
|
|
self.db.Put(list[i].Hash[:], list[i].Data)
|
|
delete(self.codeReqs, list[i].Hash)
|
|
list[i] = list[len(list)-1]
|
|
list = list[:len(list)-1]
|
|
i--
|
|
}
|
|
}
|
|
_, err := self.sync.Process(list)
|
|
return err
|
|
}
|