60 lines
2.0 KiB
Go
60 lines
2.0 KiB
Go
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// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package ethclient
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import (
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"errors"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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)
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// senderFromServer is a types.Signer that remembers the sender address returned by the RPC
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// server. It is stored in the transaction's sender address cache to avoid an additional
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// request in TransactionSender.
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type senderFromServer struct {
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addr common.Address
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blockhash common.Hash
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}
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var errNotCached = errors.New("sender not cached")
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func setSenderFromServer(tx *types.Transaction, addr common.Address, block common.Hash) {
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// Use types.Sender for side-effect to store our signer into the cache.
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types.Sender(&senderFromServer{addr, block}, tx)
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}
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func (s *senderFromServer) Equal(other types.Signer) bool {
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os, ok := other.(*senderFromServer)
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return ok && os.blockhash == s.blockhash
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}
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func (s *senderFromServer) Sender(tx *types.Transaction) (common.Address, error) {
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if s.blockhash == (common.Hash{}) {
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return common.Address{}, errNotCached
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}
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return s.addr, nil
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}
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func (s *senderFromServer) Hash(tx *types.Transaction) common.Hash {
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panic("can't sign with senderFromServer")
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}
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func (s *senderFromServer) SignatureValues(tx *types.Transaction, sig []byte) (R, S, V *big.Int, err error) {
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panic("can't sign with senderFromServer")
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}
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