github.com/klaytn/klaytn@v1.12.1/blockchain/types/derive_sha.go (about)

     1  // Modifications Copyright 2018 The klaytn Authors
     2  // Copyright 2015 The go-ethereum Authors
     3  // This file is part of the go-ethereum library.
     4  //
     5  // The go-ethereum library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Lesser General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // The go-ethereum library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  // GNU Lesser General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public License
    16  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    17  //
    18  // This file is derived from core/types/derive_sha.go (2018/06/04).
    19  // Modified and improved for the klaytn development.
    20  
    21  package types
    22  
    23  import (
    24  	"math/big"
    25  
    26  	"github.com/klaytn/klaytn/common"
    27  )
    28  
    29  type DerivableList interface {
    30  	Len() int
    31  	GetRlp(i int) []byte
    32  }
    33  
    34  const (
    35  	ImplDeriveShaOriginal int = iota
    36  	ImplDeriveShaSimple
    37  	ImplDeriveShaConcat
    38  )
    39  
    40  var (
    41  	// EmptyRootHashOriginal is the empty root hash of a state trie,
    42  	// which is equal to EmptyRootHash with ImplDeriveShaOriginal.
    43  	EmptyRootHashOriginal = common.HexToHash("0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
    44  
    45  	// DeriveSha and EmptyRootHash are populated by derivesha.InitDeriveSha().
    46  	// DeriveSha is used to calculate TransactionsRoot and ReceiptsRoot.
    47  	// EmptyRootHash is a transaction/receipt root hash when there is no transaction.
    48  	DeriveSha     func(list DerivableList, num *big.Int) common.Hash = DeriveShaNone
    49  	EmptyRootHash func(num *big.Int) common.Hash                     = EmptyRootHashNone
    50  )
    51  
    52  func DeriveShaNone(list DerivableList, num *big.Int) common.Hash {
    53  	logger.Crit("DeriveSha not initialized")
    54  	return common.Hash{}
    55  }
    56  
    57  func EmptyRootHashNone(num *big.Int) common.Hash {
    58  	logger.Crit("DeriveSha not initialized")
    59  	return common.Hash{}
    60  }