bsc/ethclient/signer.go
lightclient bbfb1e4008
all: add support for EIP-2718, EIP-2930 transactions (#21502)
This adds support for EIP-2718 typed transactions as well as EIP-2930
access list transactions (tx type 1). These EIPs are scheduled for the
Berlin fork.

There very few changes to existing APIs in core/types, and several new APIs
to deal with access list transactions. In particular, there are two new
constructor functions for transactions: types.NewTx and types.SignNewTx.
Since the canonical encoding of typed transactions is not RLP-compatible,
Transaction now has new methods for encoding and decoding: MarshalBinary
and UnmarshalBinary.

The existing EIP-155 signer does not support the new transaction types.
All code dealing with transaction signatures should be updated to use the
newer EIP-2930 signer. To make this easier for future updates, we have
added new constructor functions for types.Signer: types.LatestSigner and
types.LatestSignerForChainID. 

This change also adds support for the YoloV3 testnet.

Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Felix Lange <fjl@twurst.com>
Co-authored-by: Ryan Schneider <ryanleeschneider@gmail.com>
2021-02-25 15:26:57 +01:00

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2.1 KiB
Go

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