github.com/klaytn/klaytn@v1.12.1/cmd/homi/extra/decoder.go (about)

     1  // Copyright 2018 The klaytn Authors
     2  // Copyright 2017 AMIS Technologies
     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  package extra
    19  
    20  import (
    21  	"github.com/klaytn/klaytn/blockchain/types"
    22  	"github.com/klaytn/klaytn/common/hexutil"
    23  )
    24  
    25  func Decode(extraData string) ([]byte, *types.IstanbulExtra, error) {
    26  	extra, err := hexutil.Decode(extraData)
    27  	if err != nil {
    28  		return nil, nil, err
    29  	}
    30  
    31  	istanbulExtra, err := types.ExtractIstanbulExtra(&types.Header{Extra: extra})
    32  	if err != nil {
    33  		return nil, nil, err
    34  	}
    35  	return extra[:types.IstanbulExtraVanity], istanbulExtra, nil
    36  }