github.com/FUSIONFoundation/dcrm-go@v0.4.1-0.20190906104840-3b4071bccdbc/core/types/derive_sha.go (about)

     1  // Copyright 2014 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 types
    18  
    19  import (
    20  	"bytes"
    21  
    22  	"github.com/fusion/go-fusion/common"
    23  	"github.com/fusion/go-fusion/rlp"
    24  	"github.com/fusion/go-fusion/trie"
    25  	//"github.com/fusion/go-fusion/log" //caihaijun
    26  )
    27  
    28  type DerivableList interface {
    29  	Len() int
    30  	GetRlp(i int) []byte
    31  }
    32  
    33  func DeriveSha(list DerivableList) common.Hash {
    34  	//log.Debug("==========DeriveSha","rlp len",list.Len(),"","==============") //caihaijun
    35  	keybuf := new(bytes.Buffer)
    36  	trie := new(trie.Trie)
    37  	for i := 0; i < list.Len(); i++ {
    38  		keybuf.Reset()
    39  		rlp.Encode(keybuf, uint(i))
    40  	//	log.Debug("==========DeriveSha","rlp index",uint(i),"","==============") //caihaijun
    41  		trie.Update(keybuf.Bytes(), list.GetRlp(i))
    42  	}
    43  	//log.Debug("==========DeriveSha","trie updated and hash",trie.Hash(),"","==============") //caihaijun
    44  	return trie.Hash()
    45  }