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verifiedHeader.go
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verifiedHeader.go
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// Copyright 2014 The go-contatract Authors
// This file is part of the go-contatract library.
//
// The go-contatract 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-contatract 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-contatract library. If not, see <http://www.gnu.org/licenses/>.
package consensus
import (
"sync/atomic"
"github.com/contatract/go-contatract/common"
"github.com/contatract/go-contatract/crypto/sha3"
"github.com/contatract/go-contatract/rlp"
)
// PoliceVerifiedHeader is a result that contains the header verified by the police representing it's transactions are valid
type PoliceVerifiedHeader struct {
ShardingID uint16
BlockNum uint64
LampBase *common.Hash
Header *common.Hash
Previous []*common.Hash
Sign string
// caches
hash atomic.Value
}
func (h *PoliceVerifiedHeader) Hash() common.Hash {
if hash := h.hash.Load(); hash != nil {
return hash.(common.Hash)
}
v := rlpHash([]interface{}{
h.ShardingID,
h.BlockNum,
h.LampBase,
h.Header,
h.Previous,
})
h.hash.Store(v)
return v
}
func rlpHash(x interface{}) (h common.Hash) {
hw := sha3.NewKeccak256()
// JiangHan: 意思是将x首先进行rlp编码,然后将编码输入 hw 进行散列,用hw 的散列输出当成结果
rlp.Encode(hw, x)
hw.Sum(h[:0])
return h
}