From 9f45b425305bef793a1978070de695f3b8d9f82c Mon Sep 17 00:00:00 2001 From: Aaron Buchwald Date: Thu, 19 Nov 2020 18:49:29 -0500 Subject: Add ethclient --- ethclient/signer.go | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 ethclient/signer.go (limited to 'ethclient/signer.go') diff --git a/ethclient/signer.go b/ethclient/signer.go new file mode 100644 index 0000000..4a9f645 --- /dev/null +++ b/ethclient/signer.go @@ -0,0 +1,59 @@ +// 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 . + +package ethclient + +import ( + "errors" + "math/big" + + "github.com/ava-labs/coreth/core/types" + "github.com/ethereum/go-ethereum/common" +) + +// 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) 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") +} -- cgit v1.2.3