github.com/linapex/ethereum-dpos-chinese@v0.0.0-20190316121959-b78b3a4a1ece/ethclient/signer.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 12:09:39</date>
    10  //</624342638811680768>
    11  
    12  
    13  package ethclient
    14  
    15  import (
    16  	"errors"
    17  	"math/big"
    18  
    19  	"github.com/ethereum/go-ethereum/common"
    20  	"github.com/ethereum/go-ethereum/core/types"
    21  )
    22  
    23  //senderFromserver是一个类型。签名者记住由RPC返回的发件人地址
    24  //服务器。它存储在事务的发送方地址缓存中，以避免
    25  //TransactionSender中的请求。
    26  type senderFromServer struct {
    27  	addr      common.Address
    28  	blockhash common.Hash
    29  }
    30  
    31  var errNotCached = errors.New("sender not cached")
    32  
    33  func setSenderFromServer(tx *types.Transaction, addr common.Address, block common.Hash) {
    34  //使用types.sender作为副作用将签名者存储到缓存中。
    35  	types.Sender(&senderFromServer{addr, block}, tx)
    36  }
    37  
    38  func (s *senderFromServer) Equal(other types.Signer) bool {
    39  	os, ok := other.(*senderFromServer)
    40  	return ok && os.blockhash == s.blockhash
    41  }
    42  
    43  func (s *senderFromServer) Sender(tx *types.Transaction) (common.Address, error) {
    44  	if s.blockhash == (common.Hash{}) {
    45  		return common.Address{}, errNotCached
    46  	}
    47  	return s.addr, nil
    48  }
    49  
    50  func (s *senderFromServer) Hash(tx *types.Transaction) common.Hash {
    51  	panic("can't sign with senderFromServer")
    52  }
    53  func (s *senderFromServer) SignatureValues(tx *types.Transaction, sig []byte) (R, S, V *big.Int, err error) {
    54  	panic("can't sign with senderFromServer")
    55  }
    56