github.com/klaytn/klaytn@v1.12.1/client/signer.go (about)

     1  // Modifications Copyright 2018 The klaytn Authors
     2  // Copyright 2017 The go-ethereum Authors
     3  // This file is part of go-ethereum.
     4  //
     5  // go-ethereum is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU 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  // go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    17  //
    18  // This file is derived from ethclient/signer.go (2018/06/04).
    19  // Modified and improved for the klaytn development.
    20  
    21  package client
    22  
    23  import (
    24  	"crypto/ecdsa"
    25  	"errors"
    26  	"math/big"
    27  
    28  	"github.com/klaytn/klaytn/blockchain/types"
    29  	"github.com/klaytn/klaytn/common"
    30  )
    31  
    32  // senderFromServer is a types.Signer that remembers the sender address returned by the RPC
    33  // server. It is stored in the transaction's sender address cache to avoid an additional
    34  // request in TransactionSender.
    35  type senderFromServer struct {
    36  	addr      common.Address
    37  	blockhash common.Hash
    38  }
    39  
    40  var errNotCached = errors.New("sender not cached")
    41  
    42  func setSenderFromServer(tx *types.Transaction, addr common.Address, block common.Hash) {
    43  	// Use types.Sender for side-effect to store our signer into the cache.
    44  	types.Sender(&senderFromServer{addr, block}, tx)
    45  }
    46  
    47  func (s *senderFromServer) Equal(other types.Signer) bool {
    48  	os, ok := other.(*senderFromServer)
    49  	return ok && os.blockhash == s.blockhash
    50  }
    51  
    52  func (s *senderFromServer) Sender(tx *types.Transaction) (common.Address, error) {
    53  	if s.blockhash == (common.Hash{}) {
    54  		return common.Address{}, errNotCached
    55  	}
    56  	return s.addr, nil
    57  }
    58  
    59  func (s *senderFromServer) ChainID() *big.Int {
    60  	// TODO-Klaytn: need to check this routine is never called or not.
    61  	// `senderFromServer` is only used in klay_client.go.
    62  	panic("ChainID should not be called!")
    63  }
    64  
    65  func (s *senderFromServer) SenderPubkey(tx *types.Transaction) ([]*ecdsa.PublicKey, error) {
    66  	// TODO-Klaytn: need to check this routine is never called or not.
    67  	// `senderFromServer` is only used in klay_client.go.
    68  	panic("SenderPubkey should not be called!")
    69  }
    70  
    71  func (s *senderFromServer) SenderFeePayer(tx *types.Transaction) ([]*ecdsa.PublicKey, error) {
    72  	// TODO-Klaytn: need to check this routine is never called or not.
    73  	// `senderFromServer` is only used in klay_client.go.
    74  	panic("SenderFeePayer should not be called!")
    75  }
    76  
    77  func (s *senderFromServer) Hash(tx *types.Transaction) common.Hash {
    78  	// TODO-Klaytn: need to check this routine is never called or not.
    79  	// `senderFromServer` is only used in klay_client.go.
    80  	panic("can't sign with senderFromServer")
    81  }
    82  
    83  func (s *senderFromServer) HashFeePayer(tx *types.Transaction) (common.Hash, error) {
    84  	// TODO-Klaytn: need to check this routine is never called or not.
    85  	// `senderFromServer` is only used in klay_client.go.
    86  	panic("can't sign with senderFromServer")
    87  }
    88  
    89  func (s *senderFromServer) SignatureValues(tx *types.Transaction, sig []byte) (R, S, V *big.Int, err error) {
    90  	// TODO-Klaytn: need to check this routine is never called or not.
    91  	// `senderFromServer` is only used in klay_client.go.
    92  	panic("can't sign with senderFromServer")
    93  }