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// Copyright 2018 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 les
import (
"crypto/rand"
"fmt"
"net"
"testing"
"time"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
)
func TestULCAnnounceThresholdLes2(t *testing.T) { testULCAnnounceThreshold(t, 2) }
func TestULCAnnounceThresholdLes3(t *testing.T) { testULCAnnounceThreshold(t, 3) }
func testULCAnnounceThreshold(t *testing.T, protocol int) {
// todo figure out why it takes fetcher so longer to fetcher the announced header.
t.Skip("Sometimes it can failed")
var cases = []struct {
height []int
threshold int
expect uint64
}{
{[]int{1}, 100, 1},
{[]int{0, 0, 0}, 100, 0},
{[]int{1, 2, 3}, 30, 3},
{[]int{1, 2, 3}, 60, 2},
{[]int{3, 2, 1}, 67, 1},
{[]int{3, 2, 1}, 100, 1},
}
for _, testcase := range cases {
var (
servers []*testServer
teardowns []func()
nodes []*enode.Node
ids []string
)
for i := 0; i < len(testcase.height); i++ {
s, n, teardown := newServerPeer(t, 0, protocol)
servers = append(servers, s)
nodes = append(nodes, n)
teardowns = append(teardowns, teardown)
ids = append(ids, n.String())
}
c, teardown := newLightPeer(t, protocol, ids, testcase.threshold)
// Connect all servers.
for i := 0; i < len(servers); i++ {
connect(servers[i].handler, nodes[i].ID(), c.handler, protocol)
}
for i := 0; i < len(servers); i++ {
for j := 0; j < testcase.height[i]; j++ {
servers[i].backend.Commit()
}
}
time.Sleep(1500 * time.Millisecond) // Ensure the fetcher has done its work.
head := c.handler.backend.blockchain.CurrentHeader().Number.Uint64()
if head != testcase.expect {
t.Fatalf("chain height mismatch, want %d, got %d", testcase.expect, head)
}
// Release all servers and client resources.
teardown()
for i := 0; i < len(teardowns); i++ {
teardowns[i]()
}
}
}
func connect(server *serverHandler, serverId enode.ID, client *clientHandler, protocol int) (*peer, *peer, error) {
// Create a message pipe to communicate through
app, net := p2p.MsgPipe()
var id enode.ID
rand.Read(id[:])
peer1 := newPeer(protocol, NetworkId, true, p2p.NewPeer(serverId, "", nil), net) // Mark server as trusted
peer2 := newPeer(protocol, NetworkId, false, p2p.NewPeer(id, "", nil), app)
// Start the peerLight on a new thread
errc1 := make(chan error, 1)
errc2 := make(chan error, 1)
go func() {
select {
case <-server.closeCh:
errc1 <- p2p.DiscQuitting
case errc1 <- server.handle(peer2):
}
}()
go func() {
select {
case <-client.closeCh:
errc1 <- p2p.DiscQuitting
case errc1 <- client.handle(peer1):
}
}()
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 peer1, peer2, nil
}
// newServerPeer creates server peer.
func newServerPeer(t *testing.T, blocks int, protocol int) (*testServer, *enode.Node, func()) {
s, teardown := newServerEnv(t, blocks, protocol, nil, false, false, 0)
key, err := crypto.GenerateKey()
if err != nil {
t.Fatal("generate key err:", err)
}
s.handler.server.privateKey = key
n := enode.NewV4(&key.PublicKey, net.ParseIP("127.0.0.1"), 35000, 35000)
return s, n, teardown
}
// newLightPeer creates node with light sync mode
func newLightPeer(t *testing.T, protocol int, ulcServers []string, ulcFraction int) (*testClient, func()) {
_, c, teardown := newClientServerEnv(t, 0, protocol, nil, ulcServers, ulcFraction, false, false)
return c, teardown
}
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