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// Copyright 2019 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 (
"fmt"
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/light"
"github.com/ethereum/go-ethereum/params"
)
// Test light syncing which will download all headers from genesis.
func TestLightSyncingLes2(t *testing.T) { testCheckpointSyncing(t, 2, 0) }
func TestLightSyncingLes3(t *testing.T) { testCheckpointSyncing(t, 3, 0) }
// Test legacy checkpoint syncing which will download tail headers
// based on a hardcoded checkpoint.
func TestLegacyCheckpointSyncingLes2(t *testing.T) { testCheckpointSyncing(t, 2, 1) }
func TestLegacyCheckpointSyncingLes3(t *testing.T) { testCheckpointSyncing(t, 3, 1) }
// Test checkpoint syncing which will download tail headers based
// on a verified checkpoint.
func TestCheckpointSyncingLes2(t *testing.T) { testCheckpointSyncing(t, 2, 2) }
func TestCheckpointSyncingLes3(t *testing.T) { testCheckpointSyncing(t, 3, 2) }
func testCheckpointSyncing(t *testing.T, protocol int, syncMode int) {
config := light.TestServerIndexerConfig
waitIndexers := func(cIndexer, bIndexer, btIndexer *core.ChainIndexer) {
for {
cs, _, _ := cIndexer.Sections()
bts, _, _ := btIndexer.Sections()
if cs >= 1 && bts >= 1 {
break
}
time.Sleep(10 * time.Millisecond)
}
}
// Generate 512+4 blocks (totally 1 CHT sections)
server, client, tearDown := newClientServerEnv(t, int(config.ChtSize+config.ChtConfirms), protocol, waitIndexers, false)
defer tearDown()
expected := config.ChtSize + config.ChtConfirms
// Checkpoint syncing or legacy checkpoint syncing.
if syncMode == 1 || syncMode == 2 {
// Assemble checkpoint 0
s, _, head := server.chtIndexer.Sections()
cp := ¶ms.TrustedCheckpoint{
SectionIndex: 0,
SectionHead: head,
CHTRoot: light.GetChtRoot(server.db, s-1, head),
BloomRoot: light.GetBloomTrieRoot(server.db, s-1, head),
}
if syncMode == 1 {
// Register the assembled checkpoint as hardcoded one.
client.pm.checkpoint = cp
client.pm.blockchain.(*light.LightChain).AddTrustedCheckpoint(cp)
} else {
// Register the assembled checkpoint into oracle.
header := server.backend.Blockchain().CurrentHeader()
data := append([]byte{0x19, 0x00}, append(registrarAddr.Bytes(), append([]byte{0, 0, 0, 0, 0, 0, 0, 0}, cp.Hash().Bytes()...)...)...)
sig, _ := crypto.Sign(crypto.Keccak256(data), signerKey)
sig[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper
if _, err := server.pm.reg.contract.RegisterCheckpoint(bind.NewKeyedTransactor(signerKey), cp.SectionIndex, cp.Hash().Bytes(), new(big.Int).Sub(header.Number, big.NewInt(1)), header.ParentHash, [][]byte{sig}); err != nil {
t.Error("register checkpoint failed", err)
}
server.backend.Commit()
// Wait for the checkpoint registration
for {
_, hash, _, err := server.pm.reg.contract.Contract().GetLatestCheckpoint(nil)
if err != nil || hash == [32]byte{} {
time.Sleep(100 * time.Millisecond)
continue
}
break
}
expected += 1
}
}
done := make(chan error)
client.pm.reg.syncDoneHook = func() {
header := client.pm.blockchain.CurrentHeader()
if header.Number.Uint64() == expected {
done <- nil
} else {
done <- fmt.Errorf("blockchain length mismatch, want %d, got %d", expected, header.Number)
}
}
// Create connected peer pair.
peer, err1, lPeer, err2 := newTestPeerPair("peer", protocol, server.pm, client.pm)
select {
case <-time.After(time.Millisecond * 100):
case err := <-err1:
t.Fatalf("peer 1 handshake error: %v", err)
case err := <-err2:
t.Fatalf("peer 2 handshake error: %v", err)
}
server.rPeer, client.rPeer = peer, lPeer
select {
case err := <-done:
if err != nil {
t.Error("sync failed", err)
}
return
case <-time.NewTimer(10 * time.Second).C:
t.Error("checkpoint syncing timeout")
}
}
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