/
concat.go
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/
concat.go
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// Modifications Copyright 2018 The klaytn Authors
// 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/>.
//
// This file is derived from core/types/derive_sha.go (2018/06/04).
// Modified and improved for the klaytn development.
package derivesha
import (
"github.com/klaytn/klaytn/blockchain/types"
"github.com/klaytn/klaytn/common"
"github.com/klaytn/klaytn/crypto/sha3"
)
// An alternative implementation of DeriveSha()
// This function generates a hash of `DerivableList` as below:
// 1. make a byte slice by concatenating RLP-encoded items
// 2. make a hash of the byte slice.
type DeriveShaConcat struct{}
func (d DeriveShaConcat) DeriveSha(list types.DerivableList) (hash common.Hash) {
hasher := sha3.NewKeccak256()
for i := 0; i < list.Len(); i++ {
hasher.Write(list.GetRlp(i))
}
hasher.Sum(hash[:0])
return hash
}