github.com/Debrief-BC/go-debrief@v0.0.0-20200420203408-0c26ca968123/core/state/snapshot/account.go (about)

     1  // Copyright 2019 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 snapshot
    18  
    19  import (
    20  	"bytes"
    21  	"math/big"
    22  
    23  	"github.com/Debrief-BC/go-debrief/common"
    24  	"github.com/Debrief-BC/go-debrief/rlp"
    25  )
    26  
    27  // Account is a slim version of a state.Account, where the root and code hash
    28  // are replaced with a nil byte slice for empty accounts.
    29  type Account struct {
    30  	Nonce    uint64
    31  	Balance  *big.Int
    32  	Root     []byte
    33  	CodeHash []byte
    34  }
    35  
    36  // AccountRLP converts a state.Account content into a slim snapshot version RLP
    37  // encoded.
    38  func AccountRLP(nonce uint64, balance *big.Int, root common.Hash, codehash []byte) []byte {
    39  	slim := Account{
    40  		Nonce:   nonce,
    41  		Balance: balance,
    42  	}
    43  	if root != emptyRoot {
    44  		slim.Root = root[:]
    45  	}
    46  	if !bytes.Equal(codehash, emptyCode[:]) {
    47  		slim.CodeHash = codehash
    48  	}
    49  	data, err := rlp.EncodeToBytes(slim)
    50  	if err != nil {
    51  		panic(err)
    52  	}
    53  	return data
    54  }