Official Go implementation of the Ethereum protocol
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go-ethereum/eth/downloader/downloader_test.go

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// Copyright 2015 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 downloader
import (
"fmt"
"math/big"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/eth/protocols/eth"
"github.com/ethereum/go-ethereum/eth/protocols/snap"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
)
// downloadTester is a test simulator for mocking out local block chain.
type downloadTester struct {
chain *core.BlockChain
downloader *Downloader
peers map[string]*downloadTesterPeer
lock sync.RWMutex
}
// newTester creates a new downloader test mocker.
func newTester(t *testing.T) *downloadTester {
return newTesterWithNotification(t, nil)
}
// newTesterWithNotification creates a new downloader test mocker.
func newTesterWithNotification(t *testing.T, success func()) *downloadTester {
db, err := rawdb.NewDatabaseWithFreezer(rawdb.NewMemoryDatabase(), "", "", false)
if err != nil {
panic(err)
}
t.Cleanup(func() {
db.Close()
})
gspec := &core.Genesis{
Config: params.TestChainConfig,
Alloc: types.GenesisAlloc{testAddress: {Balance: big.NewInt(1000000000000000)}},
BaseFee: big.NewInt(params.InitialBaseFee),
}
chain, err := core.NewBlockChain(db, nil, gspec, nil, ethash.NewFaker(), vm.Config{}, nil)
if err != nil {
panic(err)
}
tester := &downloadTester{
chain: chain,
peers: make(map[string]*downloadTesterPeer),
}
tester.downloader = New(db, new(event.TypeMux), tester.chain, tester.dropPeer, success)
return tester
}
// terminate aborts any operations on the embedded downloader and releases all
// held resources.
func (dl *downloadTester) terminate() {
dl.downloader.Terminate()
dl.chain.Stop()
}
// newPeer registers a new block download source into the downloader.
func (dl *downloadTester) newPeer(id string, version uint, blocks []*types.Block) *downloadTesterPeer {
dl.lock.Lock()
defer dl.lock.Unlock()
peer := &downloadTesterPeer{
dl: dl,
id: id,
chain: newTestBlockchain(blocks),
withholdBodies: make(map[common.Hash]struct{}),
}
dl.peers[id] = peer
if err := dl.downloader.RegisterPeer(id, version, peer); err != nil {
panic(err)
}
if err := dl.downloader.SnapSyncer.Register(peer); err != nil {
panic(err)
}
return peer
}
// dropPeer simulates a hard peer removal from the connection pool.
func (dl *downloadTester) dropPeer(id string) {
dl.lock.Lock()
defer dl.lock.Unlock()
delete(dl.peers, id)
dl.downloader.SnapSyncer.Unregister(id)
dl.downloader.UnregisterPeer(id)
}
type downloadTesterPeer struct {
dl *downloadTester
withholdBodies map[common.Hash]struct{}
id string
chain *core.BlockChain
}
// Head constructs a function to retrieve a peer's current head hash
// and total difficulty.
func (dlp *downloadTesterPeer) Head() (common.Hash, *big.Int) {
head := dlp.chain.CurrentBlock()
return head.Hash(), dlp.chain.GetTd(head.Hash(), head.Number.Uint64())
}
func unmarshalRlpHeaders(rlpdata []rlp.RawValue) []*types.Header {
var headers = make([]*types.Header, len(rlpdata))
for i, data := range rlpdata {
var h types.Header
if err := rlp.DecodeBytes(data, &h); err != nil {
panic(err)
}
headers[i] = &h
}
return headers
}
// RequestHeadersByHash constructs a GetBlockHeaders function based on a hashed
// origin; associated with a particular peer in the download tester. The returned
// function can be used to retrieve batches of headers from the particular peer.
func (dlp *downloadTesterPeer) RequestHeadersByHash(origin common.Hash, amount int, skip int, reverse bool, sink chan *eth.Response) (*eth.Request, error) {
// Service the header query via the live handler code
rlpHeaders := eth.ServiceGetBlockHeadersQuery(dlp.chain, &eth.GetBlockHeadersRequest{
Origin: eth.HashOrNumber{
Hash: origin,
},
Amount: uint64(amount),
Skip: uint64(skip),
Reverse: reverse,
}, nil)
headers := unmarshalRlpHeaders(rlpHeaders)
hashes := make([]common.Hash, len(headers))
for i, header := range headers {
hashes[i] = header.Hash()
}
// Deliver the headers to the downloader
req := &eth.Request{
Peer: dlp.id,
}
res := &eth.Response{
Req: req,
Res: (*eth.BlockHeadersRequest)(&headers),
Meta: hashes,
Time: 1,
Done: make(chan error, 1), // Ignore the returned status
}
go func() {
sink <- res
}()
return req, nil
}
// RequestHeadersByNumber constructs a GetBlockHeaders function based on a numbered
// origin; associated with a particular peer in the download tester. The returned
// function can be used to retrieve batches of headers from the particular peer.
func (dlp *downloadTesterPeer) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool, sink chan *eth.Response) (*eth.Request, error) {
// Service the header query via the live handler code
rlpHeaders := eth.ServiceGetBlockHeadersQuery(dlp.chain, &eth.GetBlockHeadersRequest{
Origin: eth.HashOrNumber{
Number: origin,
},
Amount: uint64(amount),
Skip: uint64(skip),
Reverse: reverse,
}, nil)
headers := unmarshalRlpHeaders(rlpHeaders)
hashes := make([]common.Hash, len(headers))
for i, header := range headers {
hashes[i] = header.Hash()
}
// Deliver the headers to the downloader
req := &eth.Request{
Peer: dlp.id,
}
res := &eth.Response{
Req: req,
Res: (*eth.BlockHeadersRequest)(&headers),
Meta: hashes,
Time: 1,
Done: make(chan error, 1), // Ignore the returned status
}
go func() {
sink <- res
}()
return req, nil
}
// RequestBodies constructs a getBlockBodies method associated with a particular
// peer in the download tester. The returned function can be used to retrieve
// batches of block bodies from the particularly requested peer.
func (dlp *downloadTesterPeer) RequestBodies(hashes []common.Hash, sink chan *eth.Response) (*eth.Request, error) {
blobs := eth.ServiceGetBlockBodiesQuery(dlp.chain, hashes)
bodies := make([]*eth.BlockBody, len(blobs))
for i, blob := range blobs {
bodies[i] = new(eth.BlockBody)
rlp.DecodeBytes(blob, bodies[i])
}
var (
txsHashes = make([]common.Hash, len(bodies))
uncleHashes = make([]common.Hash, len(bodies))
withdrawalHashes = make([]common.Hash, len(bodies))
requestsHashes = make([]common.Hash, len(bodies))
)
hasher := trie.NewStackTrie(nil)
for i, body := range bodies {
hash := types.DeriveSha(types.Transactions(body.Transactions), hasher)
if _, ok := dlp.withholdBodies[hash]; ok {
txsHashes = append(txsHashes[:i], txsHashes[i+1:]...)
uncleHashes = append(uncleHashes[:i], uncleHashes[i+1:]...)
continue
}
txsHashes[i] = hash
uncleHashes[i] = types.CalcUncleHash(body.Uncles)
}
req := &eth.Request{
Peer: dlp.id,
}
res := &eth.Response{
Req: req,
Res: (*eth.BlockBodiesResponse)(&bodies),
Meta: [][]common.Hash{txsHashes, uncleHashes, withdrawalHashes, requestsHashes},
Time: 1,
Done: make(chan error, 1), // Ignore the returned status
}
go func() {
sink <- res
}()
return req, nil
}
// RequestReceipts constructs a getReceipts method associated with a particular
// peer in the download tester. The returned function can be used to retrieve
// batches of block receipts from the particularly requested peer.
func (dlp *downloadTesterPeer) RequestReceipts(hashes []common.Hash, sink chan *eth.Response) (*eth.Request, error) {
blobs := eth.ServiceGetReceiptsQuery(dlp.chain, hashes)
receipts := make([][]*types.Receipt, len(blobs))
for i, blob := range blobs {
rlp.DecodeBytes(blob, &receipts[i])
}
hasher := trie.NewStackTrie(nil)
hashes = make([]common.Hash, len(receipts))
for i, receipt := range receipts {
hashes[i] = types.DeriveSha(types.Receipts(receipt), hasher)
}
req := &eth.Request{
Peer: dlp.id,
}
res := &eth.Response{
Req: req,
Res: (*eth.ReceiptsResponse)(&receipts),
Meta: hashes,
Time: 1,
Done: make(chan error, 1), // Ignore the returned status
}
go func() {
sink <- res
}()
return req, nil
}
// ID retrieves the peer's unique identifier.
func (dlp *downloadTesterPeer) ID() string {
return dlp.id
}
// RequestAccountRange fetches a batch of accounts rooted in a specific account
// trie, starting with the origin.
func (dlp *downloadTesterPeer) RequestAccountRange(id uint64, root, origin, limit common.Hash, bytes uint64) error {
// Create the request and service it
req := &snap.GetAccountRangePacket{
ID: id,
Root: root,
Origin: origin,
Limit: limit,
Bytes: bytes,
}
slimaccs, proofs := snap.ServiceGetAccountRangeQuery(dlp.chain, req)
// We need to convert to non-slim format, delegate to the packet code
res := &snap.AccountRangePacket{
ID: id,
Accounts: slimaccs,
Proof: proofs,
}
hashes, accounts, _ := res.Unpack()
go dlp.dl.downloader.SnapSyncer.OnAccounts(dlp, id, hashes, accounts, proofs)
return nil
}
// RequestStorageRanges fetches a batch of storage slots belonging to one or
// more accounts. If slots from only one account is requested, an origin marker
// may also be used to retrieve from there.
func (dlp *downloadTesterPeer) RequestStorageRanges(id uint64, root common.Hash, accounts []common.Hash, origin, limit []byte, bytes uint64) error {
// Create the request and service it
req := &snap.GetStorageRangesPacket{
ID: id,
Accounts: accounts,
Root: root,
Origin: origin,
Limit: limit,
Bytes: bytes,
}
storage, proofs := snap.ServiceGetStorageRangesQuery(dlp.chain, req)
// We need to convert to demultiplex, delegate to the packet code
res := &snap.StorageRangesPacket{
ID: id,
Slots: storage,
Proof: proofs,
}
hashes, slots := res.Unpack()
go dlp.dl.downloader.SnapSyncer.OnStorage(dlp, id, hashes, slots, proofs)
return nil
}
// RequestByteCodes fetches a batch of bytecodes by hash.
func (dlp *downloadTesterPeer) RequestByteCodes(id uint64, hashes []common.Hash, bytes uint64) error {
req := &snap.GetByteCodesPacket{
ID: id,
Hashes: hashes,
Bytes: bytes,
}
codes := snap.ServiceGetByteCodesQuery(dlp.chain, req)
go dlp.dl.downloader.SnapSyncer.OnByteCodes(dlp, id, codes)
return nil
}
// RequestTrieNodes fetches a batch of account or storage trie nodes rooted in
// a specific state trie.
func (dlp *downloadTesterPeer) RequestTrieNodes(id uint64, root common.Hash, paths []snap.TrieNodePathSet, bytes uint64) error {
req := &snap.GetTrieNodesPacket{
ID: id,
Root: root,
Paths: paths,
Bytes: bytes,
}
nodes, _ := snap.ServiceGetTrieNodesQuery(dlp.chain, req, time.Now())
go dlp.dl.downloader.SnapSyncer.OnTrieNodes(dlp, id, nodes)
return nil
}
// Log retrieves the peer's own contextual logger.
func (dlp *downloadTesterPeer) Log() log.Logger {
return log.New("peer", dlp.id)
}
// assertOwnChain checks if the local chain contains the correct number of items
// of the various chain components.
func assertOwnChain(t *testing.T, tester *downloadTester, length int) {
// Mark this method as a helper to report errors at callsite, not in here
t.Helper()
headers, blocks, receipts := length, length, length
if hs := int(tester.chain.CurrentHeader().Number.Uint64()) + 1; hs != headers {
t.Fatalf("synchronised headers mismatch: have %v, want %v", hs, headers)
}
if bs := int(tester.chain.CurrentBlock().Number.Uint64()) + 1; bs != blocks {
t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, blocks)
}
if rs := int(tester.chain.CurrentSnapBlock().Number.Uint64()) + 1; rs != receipts {
t.Fatalf("synchronised receipts mismatch: have %v, want %v", rs, receipts)
}
}
func TestCanonicalSynchronisation68Full(t *testing.T) { testCanonSync(t, eth.ETH68, FullSync) }
func TestCanonicalSynchronisation68Snap(t *testing.T) { testCanonSync(t, eth.ETH68, SnapSync) }
func testCanonSync(t *testing.T, protocol uint, mode SyncMode) {
success := make(chan struct{})
tester := newTesterWithNotification(t, func() {
close(success)
})
defer tester.terminate()
// Create a small enough block chain to download
chain := testChainBase.shorten(blockCacheMaxItems - 15)
tester.newPeer("peer", protocol, chain.blocks[1:])
// Synchronise with the peer and make sure all relevant data was retrieved
if err := tester.downloader.BeaconSync(mode, chain.blocks[len(chain.blocks)-1].Header(), nil); err != nil {
t.Fatalf("failed to beacon-sync chain: %v", err)
}
select {
case <-success:
assertOwnChain(t, tester, len(chain.blocks))
case <-time.NewTimer(time.Second * 3).C:
t.Fatalf("Failed to sync chain in three seconds")
}
}
// Tests that if a large batch of blocks are being downloaded, it is throttled
// until the cached blocks are retrieved.
func TestThrottling68Full(t *testing.T) { testThrottling(t, eth.ETH68, FullSync) }
func TestThrottling68Snap(t *testing.T) { testThrottling(t, eth.ETH68, SnapSync) }
func testThrottling(t *testing.T, protocol uint, mode SyncMode) {
tester := newTester(t)
defer tester.terminate()
// Create a long block chain to download and the tester
targetBlocks := len(testChainBase.blocks) - 1
tester.newPeer("peer", protocol, testChainBase.blocks[1:])
// Wrap the importer to allow stepping
var blocked atomic.Uint32
proceed := make(chan struct{})
tester.downloader.chainInsertHook = func(results []*fetchResult) {
blocked.Store(uint32(len(results)))
<-proceed
}
// Start a synchronisation concurrently
errc := make(chan error, 1)
go func() {
errc <- tester.downloader.BeaconSync(mode, testChainBase.blocks[len(testChainBase.blocks)-1].Header(), nil)
}()
// Iteratively take some blocks, always checking the retrieval count
for {
// Check the retrieval count synchronously (! reason for this ugly block)
tester.lock.RLock()
retrieved := int(tester.chain.CurrentSnapBlock().Number.Uint64()) + 1
tester.lock.RUnlock()
if retrieved >= targetBlocks+1 {
break
}
// Wait a bit for sync to throttle itself
var cached, frozen int
for start := time.Now(); time.Since(start) < 3*time.Second; {
time.Sleep(25 * time.Millisecond)
tester.lock.Lock()
tester.downloader.queue.lock.Lock()
tester.downloader.queue.resultCache.lock.Lock()
{
cached = tester.downloader.queue.resultCache.countCompleted()
frozen = int(blocked.Load())
retrieved = int(tester.chain.CurrentSnapBlock().Number.Uint64()) + 1
}
tester.downloader.queue.resultCache.lock.Unlock()
tester.downloader.queue.lock.Unlock()
tester.lock.Unlock()
if cached == blockCacheMaxItems ||
cached == blockCacheMaxItems-reorgProtHeaderDelay ||
retrieved+cached+frozen == targetBlocks+1 ||
retrieved+cached+frozen == targetBlocks+1-reorgProtHeaderDelay {
break
}
}
// Make sure we filled up the cache, then exhaust it
time.Sleep(25 * time.Millisecond) // give it a chance to screw up
tester.lock.RLock()
retrieved = int(tester.chain.CurrentSnapBlock().Number.Uint64()) + 1
tester.lock.RUnlock()
if cached != blockCacheMaxItems && cached != blockCacheMaxItems-reorgProtHeaderDelay && retrieved+cached+frozen != targetBlocks+1 && retrieved+cached+frozen != targetBlocks+1-reorgProtHeaderDelay {
t.Fatalf("block count mismatch: have %v, want %v (owned %v, blocked %v, target %v)", cached, blockCacheMaxItems, retrieved, frozen, targetBlocks+1)
}
// Permit the blocked blocks to import
if blocked.Load() > 0 {
blocked.Store(uint32(0))
proceed <- struct{}{}
}
}
// Check that we haven't pulled more blocks than available
assertOwnChain(t, tester, targetBlocks+1)
if err := <-errc; err != nil {
t.Fatalf("block synchronization failed: %v", err)
}
}
// Tests that a canceled download wipes all previously accumulated state.
func TestCancel68Full(t *testing.T) { testCancel(t, eth.ETH68, FullSync) }
func TestCancel68Snap(t *testing.T) { testCancel(t, eth.ETH68, SnapSync) }
func testCancel(t *testing.T, protocol uint, mode SyncMode) {
complete := make(chan struct{})
success := func() {
close(complete)
}
tester := newTesterWithNotification(t, success)
defer tester.terminate()
chain := testChainBase.shorten(MaxHeaderFetch)
tester.newPeer("peer", protocol, chain.blocks[1:])
// Make sure canceling works with a pristine downloader
tester.downloader.Cancel()
if !tester.downloader.queue.Idle() {
t.Errorf("download queue not idle")
}
// Synchronise with the peer, but cancel afterwards
if err := tester.downloader.BeaconSync(mode, chain.blocks[len(chain.blocks)-1].Header(), nil); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
<-complete
tester.downloader.Cancel()
if !tester.downloader.queue.Idle() {
t.Errorf("download queue not idle")
}
}
// Tests that synchronisations behave well in multi-version protocol environments
// and not wreak havoc on other nodes in the network.
func TestMultiProtoSynchronisation68Full(t *testing.T) { testMultiProtoSync(t, eth.ETH68, FullSync) }
func TestMultiProtoSynchronisation68Snap(t *testing.T) { testMultiProtoSync(t, eth.ETH68, SnapSync) }
func testMultiProtoSync(t *testing.T, protocol uint, mode SyncMode) {
complete := make(chan struct{})
success := func() {
close(complete)
}
tester := newTesterWithNotification(t, success)
defer tester.terminate()
// Create a small enough block chain to download
chain := testChainBase.shorten(blockCacheMaxItems - 15)
// Create peers of every type
tester.newPeer("peer 68", eth.ETH68, chain.blocks[1:])
if err := tester.downloader.BeaconSync(mode, chain.blocks[len(chain.blocks)-1].Header(), nil); err != nil {
t.Fatalf("failed to start beacon sync: #{err}")
}
select {
case <-complete:
break
case <-time.NewTimer(time.Second * 3).C:
t.Fatalf("Failed to sync chain in three seconds")
}
assertOwnChain(t, tester, len(chain.blocks))
// Check that no peers have been dropped off
for _, version := range []int{68} {
peer := fmt.Sprintf("peer %d", version)
if _, ok := tester.peers[peer]; !ok {
t.Errorf("%s dropped", peer)
}
}
}
// Tests that if a block is empty (e.g. header only), no body request should be
// made, and instead the header should be assembled into a whole block in itself.
func TestEmptyShortCircuit68Full(t *testing.T) { testEmptyShortCircuit(t, eth.ETH68, FullSync) }
func TestEmptyShortCircuit68Snap(t *testing.T) { testEmptyShortCircuit(t, eth.ETH68, SnapSync) }
func testEmptyShortCircuit(t *testing.T, protocol uint, mode SyncMode) {
success := make(chan struct{})
tester := newTesterWithNotification(t, func() {
close(success)
})
defer tester.terminate()
// Create a block chain to download
chain := testChainBase
tester.newPeer("peer", protocol, chain.blocks[1:])
// Instrument the downloader to signal body requests
var bodiesHave, receiptsHave atomic.Int32
tester.downloader.bodyFetchHook = func(headers []*types.Header) {
bodiesHave.Add(int32(len(headers)))
}
tester.downloader.receiptFetchHook = func(headers []*types.Header) {
receiptsHave.Add(int32(len(headers)))
}
if err := tester.downloader.BeaconSync(mode, chain.blocks[len(chain.blocks)-1].Header(), nil); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
select {
case <-success:
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
HighestBlock: uint64(len(chain.blocks) - 1),
CurrentBlock: uint64(len(chain.blocks) - 1),
})
case <-time.NewTimer(time.Second * 3).C:
t.Fatalf("Failed to sync chain in three seconds")
}
assertOwnChain(t, tester, len(chain.blocks))
// Validate the number of block bodies that should have been requested
bodiesNeeded, receiptsNeeded := 0, 0
for _, block := range chain.blocks[1:] {
if len(block.Transactions()) > 0 || len(block.Uncles()) > 0 {
bodiesNeeded++
}
}
for _, block := range chain.blocks[1:] {
if mode == SnapSync && len(block.Transactions()) > 0 {
receiptsNeeded++
}
}
if int(bodiesHave.Load()) != bodiesNeeded {
t.Errorf("body retrieval count mismatch: have %v, want %v", bodiesHave.Load(), bodiesNeeded)
}
if int(receiptsHave.Load()) != receiptsNeeded {
t.Errorf("receipt retrieval count mismatch: have %v, want %v", receiptsHave.Load(), receiptsNeeded)
}
}
func checkProgress(t *testing.T, d *Downloader, stage string, want ethereum.SyncProgress) {
// Mark this method as a helper to report errors at callsite, not in here
t.Helper()
p := d.Progress()
if p.StartingBlock != want.StartingBlock || p.CurrentBlock != want.CurrentBlock || p.HighestBlock != want.HighestBlock {
t.Fatalf("%s progress mismatch:\nhave %+v\nwant %+v", stage, p, want)
}
}
// Tests that peers below a pre-configured checkpoint block are prevented from
// being fast-synced from, avoiding potential cheap eclipse attacks.
func TestBeaconSync68Full(t *testing.T) { testBeaconSync(t, eth.ETH68, FullSync) }
func TestBeaconSync68Snap(t *testing.T) { testBeaconSync(t, eth.ETH68, SnapSync) }
func testBeaconSync(t *testing.T, protocol uint, mode SyncMode) {
var cases = []struct {
name string // The name of testing scenario
local int // The length of local chain(canonical chain assumed), 0 means genesis is the head
}{
{name: "Beacon sync since genesis", local: 0},
{name: "Beacon sync with short local chain", local: 1},
{name: "Beacon sync with long local chain", local: blockCacheMaxItems - 15 - fsMinFullBlocks/2},
{name: "Beacon sync with full local chain", local: blockCacheMaxItems - 15 - 1},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
success := make(chan struct{})
tester := newTesterWithNotification(t, func() {
close(success)
})
defer tester.terminate()
chain := testChainBase.shorten(blockCacheMaxItems - 15)
tester.newPeer("peer", protocol, chain.blocks[1:])
// Build the local chain segment if it's required
if c.local > 0 {
tester.chain.InsertChain(chain.blocks[1 : c.local+1])
}
if err := tester.downloader.BeaconSync(mode, chain.blocks[len(chain.blocks)-1].Header(), nil); err != nil {
t.Fatalf("Failed to beacon sync chain %v %v", c.name, err)
}
select {
case <-success:
// Ok, downloader fully cancelled after sync cycle
if bs := int(tester.chain.CurrentBlock().Number.Uint64()) + 1; bs != len(chain.blocks) {
t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, len(chain.blocks))
}
case <-time.NewTimer(time.Second * 3).C:
t.Fatalf("Failed to sync chain in three seconds")
}
})
}
}
// Tests that synchronisation progress (origin block number, current block number
// and highest block number) is tracked and updated correctly.
func TestSyncProgress68Full(t *testing.T) { testSyncProgress(t, eth.ETH68, FullSync) }
func TestSyncProgress68Snap(t *testing.T) { testSyncProgress(t, eth.ETH68, SnapSync) }
func testSyncProgress(t *testing.T, protocol uint, mode SyncMode) {
success := make(chan struct{})
tester := newTesterWithNotification(t, func() {
success <- struct{}{}
})
defer tester.terminate()
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
chain := testChainBase.shorten(blockCacheMaxItems - 15)
shortChain := chain.shorten(len(chain.blocks) / 2).blocks[1:]
// Connect to peer that provides all headers and part of the bodies
faultyPeer := tester.newPeer("peer-half", protocol, shortChain)
for _, header := range shortChain {
faultyPeer.withholdBodies[header.Hash()] = struct{}{}
}
if err := tester.downloader.BeaconSync(mode, chain.blocks[len(chain.blocks)/2-1].Header(), nil); err != nil {
t.Fatalf("failed to beacon-sync chain: %v", err)
}
select {
case <-success:
// Ok, downloader fully cancelled after sync cycle
checkProgress(t, tester.downloader, "peer-half", ethereum.SyncProgress{
CurrentBlock: uint64(len(chain.blocks)/2 - 1),
HighestBlock: uint64(len(chain.blocks)/2 - 1),
})
case <-time.NewTimer(time.Second * 3).C:
t.Fatalf("Failed to sync chain in three seconds")
}
// Synchronise all the blocks and check continuation progress
tester.newPeer("peer-full", protocol, chain.blocks[1:])
if err := tester.downloader.BeaconSync(mode, chain.blocks[len(chain.blocks)-1].Header(), nil); err != nil {
t.Fatalf("failed to beacon-sync chain: %v", err)
}
startingBlock := uint64(len(chain.blocks)/2 - 1)
select {
case <-success:
// Ok, downloader fully cancelled after sync cycle
checkProgress(t, tester.downloader, "peer-full", ethereum.SyncProgress{
StartingBlock: startingBlock,
CurrentBlock: uint64(len(chain.blocks) - 1),
HighestBlock: uint64(len(chain.blocks) - 1),
})
case <-time.NewTimer(time.Second * 3).C:
t.Fatalf("Failed to sync chain in three seconds")
}
}