package les
import (
"crypto/ecdsa"
"fmt"
"math/big"
"net"
"reflect"
"testing"
"time"
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/light"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
)
func TestULCSyncWithOnePeer(t *testing.T) {
f := newFullPeerPair(t, 1, 4, testChainGen)
ulcConfig := ð.ULCConfig{
MinTrustedFraction: 100,
TrustedServers: []string{f.Node.String()},
}
l := newLightPeer(t, ulcConfig)
if reflect.DeepEqual(f.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("blocks are equal")
}
_, _, err := connectPeers(f, l, 2)
if err != nil {
t.Fatal(err)
}
l.PM.fetcher.lock.Lock()
l.PM.fetcher.nextRequest()
l.PM.fetcher.lock.Unlock()
if !reflect.DeepEqual(f.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("sync doesn't work")
}
}
func TestULCReceiveAnnounce(t *testing.T) {
f := newFullPeerPair(t, 1, 4, testChainGen)
ulcConfig := ð.ULCConfig{
MinTrustedFraction: 100,
TrustedServers: []string{f.Node.String()},
}
l := newLightPeer(t, ulcConfig)
fPeer, lPeer, err := connectPeers(f, l, 2)
if err != nil {
t.Fatal(err)
}
l.PM.synchronise(fPeer)
//check that the sync is finished correctly
if !reflect.DeepEqual(f.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("sync doesn't work")
}
l.PM.peers.lock.Lock()
if len(l.PM.peers.peers) == 0 {
t.Fatal("peer list should not be empty")
}
l.PM.peers.lock.Unlock()
time.Sleep(time.Second)
//send a signed announce message(payload doesn't matter)
td := f.PM.blockchain.GetTd(l.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Number.Uint64())
announce := announceData{
Number: l.PM.blockchain.CurrentHeader().Number.Uint64() + 1,
Td: td.Add(td, big.NewInt(1)),
}
announce.sign(f.Key)
lPeer.SendAnnounce(announce)
}
func TestULCShouldNotSyncWithTwoPeersOneHaveEmptyChain(t *testing.T) {
f1 := newFullPeerPair(t, 1, 4, testChainGen)
f2 := newFullPeerPair(t, 2, 0, nil)
ulcConf := &ulc{minTrustedFraction: 100, trustedKeys: make(map[string]struct{})}
ulcConf.trustedKeys[f1.Node.ID().String()] = struct{}{}
ulcConf.trustedKeys[f2.Node.ID().String()] = struct{}{}
ulcConfig := ð.ULCConfig{
MinTrustedFraction: 100,
TrustedServers: []string{f1.Node.String(), f2.Node.String()},
}
l := newLightPeer(t, ulcConfig)
l.PM.ulc.minTrustedFraction = 100
_, _, err := connectPeers(f1, l, 2)
if err != nil {
t.Fatal(err)
}
_, _, err = connectPeers(f2, l, 2)
if err != nil {
t.Fatal(err)
}
l.PM.fetcher.lock.Lock()
l.PM.fetcher.nextRequest()
l.PM.fetcher.lock.Unlock()
if reflect.DeepEqual(f2.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("Incorrect hash: second peer has empty chain")
}
}
func TestULCShouldNotSyncWithThreePeersOneHaveEmptyChain(t *testing.T) {
f1 := newFullPeerPair(t, 1, 3, testChainGen)
f2 := newFullPeerPair(t, 2, 4, testChainGen)
f3 := newFullPeerPair(t, 3, 0, nil)
ulcConfig := ð.ULCConfig{
MinTrustedFraction: 60,
TrustedServers: []string{f1.Node.String(), f2.Node.String(), f3.Node.String()},
}
l := newLightPeer(t, ulcConfig)
_, _, err := connectPeers(f1, l, 2)
if err != nil {
t.Fatal(err)
}
_, _, err = connectPeers(f2, l, 2)
if err != nil {
t.Fatal(err)
}
_, _, err = connectPeers(f3, l, 2)
if err != nil {
t.Fatal(err)
}
l.PM.fetcher.lock.Lock()
l.PM.fetcher.nextRequest()
l.PM.fetcher.lock.Unlock()
if !reflect.DeepEqual(f1.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("Incorrect hash")
}
}
type pairPeer struct {
Name string
Node *enode.Node
PM *ProtocolManager
Key *ecdsa.PrivateKey
}
func connectPeers(full, light pairPeer, version int) (*peer, *peer, error) {
// Create a message pipe to communicate through
app, net := p2p.MsgPipe()
peerLight := full.PM.newPeer(version, NetworkId, p2p.NewPeer(light.Node.ID(), light.Name, nil), net)
peerFull := light.PM.newPeer(version, NetworkId, p2p.NewPeer(full.Node.ID(), full.Name, nil), app)
// Start the peerLight on a new thread
errc1 := make(chan error, 1)
errc2 := make(chan error, 1)
go func() {
select {
case light.PM.newPeerCh <- peerFull:
errc1 <- light.PM.handle(peerFull)
case <-light.PM.quitSync:
errc1 <- p2p.DiscQuitting
}
}()
go func() {
select {
case full.PM.newPeerCh <- peerLight:
errc2 <- full.PM.handle(peerLight)
case <-full.PM.quitSync:
errc2 <- p2p.DiscQuitting
}
}()
select {
case <-time.After(time.Millisecond * 100):
case err := <-errc1:
return nil, nil, fmt.Errorf("peerLight handshake error: %v", err)
case err := <-errc2:
return nil, nil, fmt.Errorf("peerFull handshake error: %v", err)
}
return peerFull, peerLight, nil
}
// newFullPeerPair creates node with full sync mode
func newFullPeerPair(t *testing.T, index int, numberOfblocks int, chainGen func(int, *core.BlockGen)) pairPeer {
db := rawdb.NewMemoryDatabase()
pmFull := newTestProtocolManagerMust(t, false, numberOfblocks, chainGen, nil, nil, db, nil)
peerPairFull := pairPeer{
Name: "full node",
PM: pmFull,
}
key, err := crypto.GenerateKey()
if err != nil {
t.Fatal("generate key err:", err)
}
peerPairFull.Key = key
peerPairFull.Node = enode.NewV4(&key.PublicKey, net.ParseIP("127.0.0.1"), 35000, 35000)
return peerPairFull
}
// newLightPeer creates node with light sync mode
func newLightPeer(t *testing.T, ulcConfig *eth.ULCConfig) pairPeer {
peers := newPeerSet()
dist := newRequestDistributor(peers, make(chan struct{}), &mclock.System{})
rm := newRetrieveManager(peers, dist, nil)
ldb := rawdb.NewMemoryDatabase()
odr := NewLesOdr(ldb, light.DefaultClientIndexerConfig, rm)
pmLight := newTestProtocolManagerMust(t, true, 0, nil, odr, peers, ldb, ulcConfig)
peerPairLight := pairPeer{
Name: "ulc node",
PM: pmLight,
}
key, err := crypto.GenerateKey()
if err != nil {
t.Fatal("generate key err:", err)
}
peerPairLight.Key = key
peerPairLight.Node = enode.NewV4(&key.PublicKey, net.IP{}, 35000, 35000)
return peerPairLight
}
