2017-10-31 15:24:11 -07:00
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// Copyright 2015 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 backend
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import (
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2018-10-12 08:09:43 -07:00
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"bytes"
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"io/ioutil"
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"math/big"
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"testing"
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2018-10-12 08:09:43 -07:00
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"github.com/ethereum/go-ethereum/core/types"
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2017-10-31 15:24:11 -07:00
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/istanbul"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/hashicorp/golang-lru"
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)
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func TestIstanbulMessage(t *testing.T) {
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_, backend := newBlockChain(1)
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// generate one msg
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data := []byte("data1")
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hash := istanbul.RLPHash(data)
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msg := makeMsg(istanbulMsg, data)
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addr := common.StringToAddress("address")
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// 1. this message should not be in cache
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// for peers
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if _, ok := backend.recentMessages.Get(addr); ok {
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t.Fatalf("the cache of messages for this peer should be nil")
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}
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// for self
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if _, ok := backend.knownMessages.Get(hash); ok {
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t.Fatalf("the cache of messages should be nil")
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}
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// 2. this message should be in cache after we handle it
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_, err := backend.HandleMsg(addr, msg)
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if err != nil {
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t.Fatalf("handle message failed: %v", err)
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}
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// for peers
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if ms, ok := backend.recentMessages.Get(addr); ms == nil || !ok {
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t.Fatalf("the cache of messages for this peer cannot be nil")
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} else if m, ok := ms.(*lru.ARCCache); !ok {
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t.Fatalf("the cache of messages for this peer cannot be casted")
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} else if _, ok := m.Get(hash); !ok {
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t.Fatalf("the cache of messages for this peer cannot be found")
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}
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// for self
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if _, ok := backend.knownMessages.Get(hash); !ok {
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t.Fatalf("the cache of messages cannot be found")
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}
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}
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func makeMsg(msgcode uint64, data interface{}) p2p.Msg {
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size, r, _ := rlp.EncodeToReader(data)
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return p2p.Msg{Code: msgcode, Size: uint32(size), Payload: r}
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}
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func TestHandleNewBlockMessage_whenTypical(t *testing.T) {
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_, backend := newBlockChain(1)
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arbitraryAddress := common.StringToAddress("arbitrary")
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arbitraryBlock, arbitraryP2PMessage := buildArbitraryP2PNewBlockMessage(t, false)
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postAndWait(backend, arbitraryBlock, t)
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handled, err := backend.HandleMsg(arbitraryAddress, arbitraryP2PMessage)
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if err != nil {
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t.Errorf("expected message being handled successfully but got %s", err)
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}
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if !handled {
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t.Errorf("expected message being handled but not")
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}
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if _, err := ioutil.ReadAll(arbitraryP2PMessage.Payload); err != nil {
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t.Errorf("expected p2p message payload is restored")
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}
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}
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func TestHandleNewBlockMessage_whenNotAProposedBlock(t *testing.T) {
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_, backend := newBlockChain(1)
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arbitraryAddress := common.StringToAddress("arbitrary")
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_, arbitraryP2PMessage := buildArbitraryP2PNewBlockMessage(t, false)
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postAndWait(backend, types.NewBlock(&types.Header{
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Number: big.NewInt(1),
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Root: common.StringToHash("someroot"),
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GasLimit: 1,
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MixDigest: types.IstanbulDigest,
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}, nil, nil, nil), t)
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handled, err := backend.HandleMsg(arbitraryAddress, arbitraryP2PMessage)
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if err != nil {
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t.Errorf("expected message being handled successfully but got %s", err)
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}
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if handled {
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t.Errorf("expected message not being handled")
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}
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if _, err := ioutil.ReadAll(arbitraryP2PMessage.Payload); err != nil {
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t.Errorf("expected p2p message payload is restored")
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}
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}
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func TestHandleNewBlockMessage_whenFailToDecode(t *testing.T) {
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_, backend := newBlockChain(1)
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arbitraryAddress := common.StringToAddress("arbitrary")
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_, arbitraryP2PMessage := buildArbitraryP2PNewBlockMessage(t, true)
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postAndWait(backend, types.NewBlock(&types.Header{
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Number: big.NewInt(1),
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GasLimit: 1,
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MixDigest: types.IstanbulDigest,
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}, nil, nil, nil), t)
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handled, err := backend.HandleMsg(arbitraryAddress, arbitraryP2PMessage)
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if err != nil {
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t.Errorf("expected message being handled successfully but got %s", err)
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}
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if handled {
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t.Errorf("expected message not being handled")
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}
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if _, err := ioutil.ReadAll(arbitraryP2PMessage.Payload); err != nil {
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t.Errorf("expected p2p message payload is restored")
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}
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}
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func postAndWait(backend *backend, block *types.Block, t *testing.T) {
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eventSub := backend.EventMux().Subscribe(istanbul.RequestEvent{})
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defer eventSub.Unsubscribe()
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stop := make(chan struct{}, 1)
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eventLoop := func() {
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select {
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case <-eventSub.Chan():
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stop <- struct{}{}
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}
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}
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go eventLoop()
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if err := backend.EventMux().Post(istanbul.RequestEvent{
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Proposal: block,
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}); err != nil {
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t.Fatalf("%s", err)
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}
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<-stop
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}
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func buildArbitraryP2PNewBlockMessage(t *testing.T, invalidMsg bool) (*types.Block, p2p.Msg) {
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arbitraryBlock := types.NewBlock(&types.Header{
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Number: big.NewInt(1),
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GasLimit: 0,
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MixDigest: types.IstanbulDigest,
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}, nil, nil, nil)
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request := []interface{}{&arbitraryBlock, big.NewInt(1)}
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if invalidMsg {
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request = []interface{}{"invalid msg"}
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}
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size, r, err := rlp.EncodeToReader(request)
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if err != nil {
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t.Fatalf("can't encode due to %s", err)
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}
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payload, err := ioutil.ReadAll(r)
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if err != nil {
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t.Fatalf("can't read payload due to %s", err)
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}
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arbitraryP2PMessage := p2p.Msg{Code: 0x07, Size: uint32(size), Payload: bytes.NewReader(payload)}
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return arbitraryBlock, arbitraryP2PMessage
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}
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