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Geth-Modification
Unverified Commit 0bcff8f5 authored by Felix Lange's avatar Felix Lange Committed by GitHub
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eth/downloader: speed up tests by generating chain only once (#17916) 

* core: speed up GenerateChain

Use a mock implementation of ChainReader instead of creating
and destroying a BlockChain object for each generated block.

* eth/downloader: speed up tests by generating chain only once

This change reworks the downloader tests so they share a common test
blockchain instead of generating a chain in every test. The tests are
roughly twice as fast now.
parent 36ca85fa
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Showing with 519 additions and 560 deletions
core/chain_makers.go
View file @ 0bcff8f5
......@@ -33,12 +33,11 @@ import (
// BlockGen creates blocks for testing.
// See GenerateChain for a detailed explanation.
type BlockGen struct {
i int
parent *types.Block
chain []*types.Block
chainReader consensus.ChainReader
header *types.Header
statedb *state.StateDB
i int
parent *types.Block
chain []*types.Block
header *types.Header
statedb *state.StateDB
gasPool *GasPool
txs []*types.Transaction
......@@ -138,7 +137,7 @@ func (b *BlockGen) AddUncle(h *types.Header) {
// For index -1, PrevBlock returns the parent block given to GenerateChain.
func (b *BlockGen) PrevBlock(index int) *types.Block {
if index >= b.i {
panic("block index out of range")
panic(fmt.Errorf("block index %d out of range (%d,%d)", index, -1, b.i))
}
if index == -1 {
return b.parent
......@@ -154,7 +153,8 @@ func (b *BlockGen) OffsetTime(seconds int64) {
if b.header.Time.Cmp(b.parent.Header().Time) <= 0 {
panic("block time out of range")
}
b.header.Difficulty = b.engine.CalcDifficulty(b.chainReader, b.header.Time.Uint64(), b.parent.Header())
chainreader := &fakeChainReader{config: b.config}
b.header.Difficulty = b.engine.CalcDifficulty(chainreader, b.header.Time.Uint64(), b.parent.Header())
}
// GenerateChain creates a chain of n blocks. The first block's
......@@ -174,14 +174,10 @@ func GenerateChain(config *params.ChainConfig, parent *types.Block, engine conse
config = params.TestChainConfig
}
blocks, receipts := make(types.Blocks, n), make([]types.Receipts, n)
chainreader := &fakeChainReader{config: config}
genblock := func(i int, parent *types.Block, statedb *state.StateDB) (*types.Block, types.Receipts) {
// TODO(karalabe): This is needed for clique, which depends on multiple blocks.
// It's nonetheless ugly to spin up a blockchain here. Get rid of this somehow.
blockchain, _ := NewBlockChain(db, nil, config, engine, vm.Config{}, nil)
defer blockchain.Stop()
b := &BlockGen{i: i, parent: parent, chain: blocks, chainReader: blockchain, statedb: statedb, config: config, engine: engine}
b.header = makeHeader(b.chainReader, parent, statedb, b.engine)
b := &BlockGen{i: i, chain: blocks, parent: parent, statedb: statedb, config: config, engine: engine}
b.header = makeHeader(chainreader, parent, statedb, b.engine)
// Mutate the state and block according to any hard-fork specs
if daoBlock := config.DAOForkBlock; daoBlock != nil {
......@@ -201,7 +197,7 @@ func GenerateChain(config *params.ChainConfig, parent *types.Block, engine conse
}
if b.engine != nil {
// Finalize and seal the block
block, _ := b.engine.Finalize(b.chainReader, b.header, statedb, b.txs, b.uncles, b.receipts)
block, _ := b.engine.Finalize(chainreader, b.header, statedb, b.txs, b.uncles, b.receipts)
// Write state changes to db
root, err := statedb.Commit(config.IsEIP158(b.header.Number))
......@@ -269,3 +265,19 @@ func makeBlockChain(parent *types.Block, n int, engine consensus.Engine, db ethd
})
return blocks
}
type fakeChainReader struct {
config *params.ChainConfig
genesis *types.Block
}
// Config returns the chain configuration.
func (cr *fakeChainReader) Config() *params.ChainConfig {
return cr.config
}
func (cr *fakeChainReader) CurrentHeader() *types.Header { return nil }
func (cr *fakeChainReader) GetHeaderByNumber(number uint64) *types.Header { return nil }
func (cr *fakeChainReader) GetHeaderByHash(hash common.Hash) *types.Header { return nil }
func (cr *fakeChainReader) GetHeader(hash common.Hash, number uint64) *types.Header { return nil }
func (cr *fakeChainReader) GetBlock(hash common.Hash, number uint64) *types.Block { return nil }
eth/downloader/downloader_test.go
View file @ 0bcff8f5
......@@ -25,22 +25,14 @@ import (
"testing"
"time"
ethereum "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/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
)
var (
testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
testAddress = crypto.PubkeyToAddress(testKey.PublicKey)
)
// Reduce some of the parameters to make the tester faster.
func init() {
MaxForkAncestry = uint64(10000)
......@@ -55,6 +47,7 @@ type downloadTester struct {
genesis *types.Block // Genesis blocks used by the tester and peers
stateDb ethdb.Database // Database used by the tester for syncing from peers
peerDb ethdb.Database // Database of the peers containing all data
peers map[string]*downloadTesterPeer
ownHashes []common.Hash // Hash chain belonging to the tester
ownHeaders map[common.Hash]*types.Header // Headers belonging to the tester
......@@ -62,129 +55,27 @@ type downloadTester struct {
ownReceipts map[common.Hash]types.Receipts // Receipts belonging to the tester
ownChainTd map[common.Hash]*big.Int // Total difficulties of the blocks in the local chain
peerHashes map[string][]common.Hash // Hash chain belonging to different test peers
peerHeaders map[string]map[common.Hash]*types.Header // Headers belonging to different test peers
peerBlocks map[string]map[common.Hash]*types.Block // Blocks belonging to different test peers
peerReceipts map[string]map[common.Hash]types.Receipts // Receipts belonging to different test peers
peerChainTds map[string]map[common.Hash]*big.Int // Total difficulties of the blocks in the peer chains
peerMissingStates map[string]map[common.Hash]bool // State entries that fast sync should not return
lock sync.RWMutex
}
// newTester creates a new downloader test mocker.
func newTester() *downloadTester {
testdb := ethdb.NewMemDatabase()
genesis := core.GenesisBlockForTesting(testdb, testAddress, big.NewInt(1000000000))
tester := &downloadTester{
genesis: genesis,
peerDb: testdb,
ownHashes: []common.Hash{genesis.Hash()},
ownHeaders: map[common.Hash]*types.Header{genesis.Hash(): genesis.Header()},
ownBlocks: map[common.Hash]*types.Block{genesis.Hash(): genesis},
ownReceipts: map[common.Hash]types.Receipts{genesis.Hash(): nil},
ownChainTd: map[common.Hash]*big.Int{genesis.Hash(): genesis.Difficulty()},
peerHashes: make(map[string][]common.Hash),
peerHeaders: make(map[string]map[common.Hash]*types.Header),
peerBlocks: make(map[string]map[common.Hash]*types.Block),
peerReceipts: make(map[string]map[common.Hash]types.Receipts),
peerChainTds: make(map[string]map[common.Hash]*big.Int),
peerMissingStates: make(map[string]map[common.Hash]bool),
genesis: testGenesis,
peerDb: testDB,
peers: make(map[string]*downloadTesterPeer),
ownHashes: []common.Hash{testGenesis.Hash()},
ownHeaders: map[common.Hash]*types.Header{testGenesis.Hash(): testGenesis.Header()},
ownBlocks: map[common.Hash]*types.Block{testGenesis.Hash(): testGenesis},
ownReceipts: map[common.Hash]types.Receipts{testGenesis.Hash(): nil},
ownChainTd: map[common.Hash]*big.Int{testGenesis.Hash(): testGenesis.Difficulty()},
}
tester.stateDb = ethdb.NewMemDatabase()
tester.stateDb.Put(genesis.Root().Bytes(), []byte{0x00})
tester.stateDb.Put(testGenesis.Root().Bytes(), []byte{0x00})
tester.downloader = New(FullSync, tester.stateDb, new(event.TypeMux), tester, nil, tester.dropPeer)
return tester
}
// makeChain creates a chain of n blocks starting at and including parent.
// the returned hash chain is ordered head->parent. In addition, every 3rd block
// contains a transaction and every 5th an uncle to allow testing correct block
// reassembly.
func (dl *downloadTester) makeChain(n int, seed byte, parent *types.Block, parentReceipts types.Receipts, heavy bool) ([]common.Hash, map[common.Hash]*types.Header, map[common.Hash]*types.Block, map[common.Hash]types.Receipts) {
// Generate the block chain
blocks, receipts := core.GenerateChain(params.TestChainConfig, parent, ethash.NewFaker(), dl.peerDb, n, func(i int, block *core.BlockGen) {
block.SetCoinbase(common.Address{seed})
// If a heavy chain is requested, delay blocks to raise difficulty
if heavy {
block.OffsetTime(-1)
}
// If the block number is multiple of 3, send a bonus transaction to the miner
if parent == dl.genesis && i%3 == 0 {
signer := types.MakeSigner(params.TestChainConfig, block.Number())
tx, err := types.SignTx(types.NewTransaction(block.TxNonce(testAddress), common.Address{seed}, big.NewInt(1000), params.TxGas, nil, nil), signer, testKey)
if err != nil {
panic(err)
}
block.AddTx(tx)
}
// If the block number is a multiple of 5, add a bonus uncle to the block
if i > 0 && i%5 == 0 {
block.AddUncle(&types.Header{
ParentHash: block.PrevBlock(i - 1).Hash(),
Number: big.NewInt(block.Number().Int64() - 1),
})
}
})
// Convert the block-chain into a hash-chain and header/block maps
hashes := make([]common.Hash, n+1)
hashes[len(hashes)-1] = parent.Hash()
headerm := make(map[common.Hash]*types.Header, n+1)
headerm[parent.Hash()] = parent.Header()
blockm := make(map[common.Hash]*types.Block, n+1)
blockm[parent.Hash()] = parent
receiptm := make(map[common.Hash]types.Receipts, n+1)
receiptm[parent.Hash()] = parentReceipts
for i, b := range blocks {
hashes[len(hashes)-i-2] = b.Hash()
headerm[b.Hash()] = b.Header()
blockm[b.Hash()] = b
receiptm[b.Hash()] = receipts[i]
}
return hashes, headerm, blockm, receiptm
}
// makeChainFork creates two chains of length n, such that h1[:f] and
// h2[:f] are different but have a common suffix of length n-f.
func (dl *downloadTester) makeChainFork(n, f int, parent *types.Block, parentReceipts types.Receipts, balanced bool) ([]common.Hash, []common.Hash, map[common.Hash]*types.Header, map[common.Hash]*types.Header, map[common.Hash]*types.Block, map[common.Hash]*types.Block, map[common.Hash]types.Receipts, map[common.Hash]types.Receipts) {
// Create the common suffix
hashes, headers, blocks, receipts := dl.makeChain(n-f, 0, parent, parentReceipts, false)
// Create the forks, making the second heavier if non balanced forks were requested
hashes1, headers1, blocks1, receipts1 := dl.makeChain(f, 1, blocks[hashes[0]], receipts[hashes[0]], false)
hashes1 = append(hashes1, hashes[1:]...)
heavy := false
if !balanced {
heavy = true
}
hashes2, headers2, blocks2, receipts2 := dl.makeChain(f, 2, blocks[hashes[0]], receipts[hashes[0]], heavy)
hashes2 = append(hashes2, hashes[1:]...)
for hash, header := range headers {
headers1[hash] = header
headers2[hash] = header
}
for hash, block := range blocks {
blocks1[hash] = block
blocks2[hash] = block
}
for hash, receipt := range receipts {
receipts1[hash] = receipt
receipts2[hash] = receipt
}
return hashes1, hashes2, headers1, headers2, blocks1, blocks2, receipts1, receipts2
}
// terminate aborts any operations on the embedded downloader and releases all
// held resources.
func (dl *downloadTester) terminate() {
......@@ -194,13 +85,10 @@ func (dl *downloadTester) terminate() {
// sync starts synchronizing with a remote peer, blocking until it completes.
func (dl *downloadTester) sync(id string, td *big.Int, mode SyncMode) error {
dl.lock.RLock()
hash := dl.peerHashes[id][0]
hash := dl.peers[id].chain.headBlock().Hash()
// If no particular TD was requested, load from the peer's blockchain
if td == nil {
td = big.NewInt(1)
if diff, ok := dl.peerChainTds[id][hash]; ok {
td = diff
}
td = dl.peers[id].chain.td(hash)
}
dl.lock.RUnlock()
......@@ -302,7 +190,7 @@ func (dl *downloadTester) GetTd(hash common.Hash, number uint64) *big.Int {
}
// InsertHeaderChain injects a new batch of headers into the simulated chain.
func (dl *downloadTester) InsertHeaderChain(headers []*types.Header, checkFreq int) (int, error) {
func (dl *downloadTester) InsertHeaderChain(headers []*types.Header, checkFreq int) (i int, err error) {
dl.lock.Lock()
defer dl.lock.Unlock()
......@@ -331,7 +219,7 @@ func (dl *downloadTester) InsertHeaderChain(headers []*types.Header, checkFreq i
}
// InsertChain injects a new batch of blocks into the simulated chain.
func (dl *downloadTester) InsertChain(blocks types.Blocks) (int, error) {
func (dl *downloadTester) InsertChain(blocks types.Blocks) (i int, err error) {
dl.lock.Lock()
defer dl.lock.Unlock()
......@@ -353,7 +241,7 @@ func (dl *downloadTester) InsertChain(blocks types.Blocks) (int, error) {
}
// InsertReceiptChain injects a new batch of receipts into the simulated chain.
func (dl *downloadTester) InsertReceiptChain(blocks types.Blocks, receipts []types.Receipts) (int, error) {
func (dl *downloadTester) InsertReceiptChain(blocks types.Blocks, receipts []types.Receipts) (i int, err error) {
dl.lock.Lock()
defer dl.lock.Unlock()
......@@ -387,60 +275,13 @@ func (dl *downloadTester) Rollback(hashes []common.Hash) {
}
// newPeer registers a new block download source into the downloader.
func (dl *downloadTester) newPeer(id string, version int, hashes []common.Hash, headers map[common.Hash]*types.Header, blocks map[common.Hash]*types.Block, receipts map[common.Hash]types.Receipts) error {
return dl.newSlowPeer(id, version, hashes, headers, blocks, receipts, 0)
}
// newSlowPeer registers a new block download source into the downloader, with a
// specific delay time on processing the network packets sent to it, simulating
// potentially slow network IO.
func (dl *downloadTester) newSlowPeer(id string, version int, hashes []common.Hash, headers map[common.Hash]*types.Header, blocks map[common.Hash]*types.Block, receipts map[common.Hash]types.Receipts, delay time.Duration) error {
func (dl *downloadTester) newPeer(id string, version int, chain *testChain) error {
dl.lock.Lock()
defer dl.lock.Unlock()
var err = dl.downloader.RegisterPeer(id, version, &downloadTesterPeer{dl: dl, id: id, delay: delay})
if err == nil {
// Assign the owned hashes, headers and blocks to the peer (deep copy)
dl.peerHashes[id] = make([]common.Hash, len(hashes))
copy(dl.peerHashes[id], hashes)
dl.peerHeaders[id] = make(map[common.Hash]*types.Header)
dl.peerBlocks[id] = make(map[common.Hash]*types.Block)
dl.peerReceipts[id] = make(map[common.Hash]types.Receipts)
dl.peerChainTds[id] = make(map[common.Hash]*big.Int)
dl.peerMissingStates[id] = make(map[common.Hash]bool)
genesis := hashes[len(hashes)-1]
if header := headers[genesis]; header != nil {
dl.peerHeaders[id][genesis] = header
dl.peerChainTds[id][genesis] = header.Difficulty
}
if block := blocks[genesis]; block != nil {
dl.peerBlocks[id][genesis] = block
dl.peerChainTds[id][genesis] = block.Difficulty()
}
for i := len(hashes) - 2; i >= 0; i-- {
hash := hashes[i]
if header, ok := headers[hash]; ok {
dl.peerHeaders[id][hash] = header
if _, ok := dl.peerHeaders[id][header.ParentHash]; ok {
dl.peerChainTds[id][hash] = new(big.Int).Add(header.Difficulty, dl.peerChainTds[id][header.ParentHash])
}
}
if block, ok := blocks[hash]; ok {
dl.peerBlocks[id][hash] = block
if _, ok := dl.peerBlocks[id][block.ParentHash()]; ok {
dl.peerChainTds[id][hash] = new(big.Int).Add(block.Difficulty(), dl.peerChainTds[id][block.ParentHash()])
}
}
if receipt, ok := receipts[hash]; ok {
dl.peerReceipts[id][hash] = receipt
}
}
}
return err
peer := &downloadTesterPeer{dl: dl, id: id, chain: chain}
dl.peers[id] = peer
return dl.downloader.RegisterPeer(id, version, peer)
}
// dropPeer simulates a hard peer removal from the connection pool.
......@@ -448,89 +289,48 @@ func (dl *downloadTester) dropPeer(id string) {
dl.lock.Lock()
defer dl.lock.Unlock()
delete(dl.peerHashes, id)
delete(dl.peerHeaders, id)
delete(dl.peerBlocks, id)
delete(dl.peerChainTds, id)
delete(dl.peers, id)
dl.downloader.UnregisterPeer(id)
}
type downloadTesterPeer struct {
dl *downloadTester
id string
delay time.Duration
lock sync.RWMutex
}
// setDelay is a thread safe setter for the network delay value.
func (dlp *downloadTesterPeer) setDelay(delay time.Duration) {
dlp.lock.Lock()
defer dlp.lock.Unlock()
dlp.delay = delay
}
// waitDelay is a thread safe way to sleep for the configured time.
func (dlp *downloadTesterPeer) waitDelay() {
dlp.lock.RLock()
delay := dlp.delay
dlp.lock.RUnlock()
time.Sleep(delay)
dl *downloadTester
id string
lock sync.RWMutex
chain *testChain
missingStates map[common.Hash]bool // State entries that fast sync should not return
}
// Head constructs a function to retrieve a peer's current head hash
// and total difficulty.
func (dlp *downloadTesterPeer) Head() (common.Hash, *big.Int) {
dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock()
return dlp.dl.peerHashes[dlp.id][0], nil
b := dlp.chain.headBlock()
return b.Hash(), dlp.chain.td(b.Hash())
}
// 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) error {
// Find the canonical number of the hash
dlp.dl.lock.RLock()
number := uint64(0)
for num, hash := range dlp.dl.peerHashes[dlp.id] {
if hash == origin {
number = uint64(len(dlp.dl.peerHashes[dlp.id]) - num - 1)
break
}
if reverse {
panic("reverse header requests not supported")
}
dlp.dl.lock.RUnlock()
// Use the absolute header fetcher to satisfy the query
return dlp.RequestHeadersByNumber(number, amount, skip, reverse)
result := dlp.chain.headersByHash(origin, amount, skip)
go dlp.dl.downloader.DeliverHeaders(dlp.id, result)
return 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) error {
dlp.waitDelay()
dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock()
// Gather the next batch of headers
hashes := dlp.dl.peerHashes[dlp.id]
headers := dlp.dl.peerHeaders[dlp.id]
result := make([]*types.Header, 0, amount)
for i := 0; i < amount && len(hashes)-int(origin)-1-i*(skip+1) >= 0; i++ {
if header, ok := headers[hashes[len(hashes)-int(origin)-1-i*(skip+1)]]; ok {
result = append(result, header)
}
if reverse {
panic("reverse header requests not supported")
}
// Delay delivery a bit to allow attacks to unfold
go func() {
time.Sleep(time.Millisecond)
dlp.dl.downloader.DeliverHeaders(dlp.id, result)
}()
result := dlp.chain.headersByNumber(origin, amount, skip)
go dlp.dl.downloader.DeliverHeaders(dlp.id, result)
return nil
}
......@@ -538,24 +338,8 @@ func (dlp *downloadTesterPeer) RequestHeadersByNumber(origin uint64, amount int,
// 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) error {
dlp.waitDelay()
dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock()
blocks := dlp.dl.peerBlocks[dlp.id]
transactions := make([][]*types.Transaction, 0, len(hashes))
uncles := make([][]*types.Header, 0, len(hashes))
for _, hash := range hashes {
if block, ok := blocks[hash]; ok {
transactions = append(transactions, block.Transactions())
uncles = append(uncles, block.Uncles())
}
}
go dlp.dl.downloader.DeliverBodies(dlp.id, transactions, uncles)
txs, uncles := dlp.chain.bodies(hashes)
go dlp.dl.downloader.DeliverBodies(dlp.id, txs, uncles)
return nil
}
......@@ -563,21 +347,8 @@ func (dlp *downloadTesterPeer) RequestBodies(hashes []common.Hash) error {
// 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) error {
dlp.waitDelay()
dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock()
receipts := dlp.dl.peerReceipts[dlp.id]
results := make([][]*types.Receipt, 0, len(hashes))
for _, hash := range hashes {
if receipt, ok := receipts[hash]; ok {
results = append(results, receipt)
}
}
go dlp.dl.downloader.DeliverReceipts(dlp.id, results)
receipts := dlp.chain.receipts(hashes)
go dlp.dl.downloader.DeliverReceipts(dlp.id, receipts)
return nil
}
......@@ -585,21 +356,18 @@ func (dlp *downloadTesterPeer) RequestReceipts(hashes []common.Hash) error {
// peer in the download tester. The returned function can be used to retrieve
// batches of node state data from the particularly requested peer.
func (dlp *downloadTesterPeer) RequestNodeData(hashes []common.Hash) error {
dlp.waitDelay()
dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock()
results := make([][]byte, 0, len(hashes))
for _, hash := range hashes {
if data, err := dlp.dl.peerDb.Get(hash.Bytes()); err == nil {
if !dlp.dl.peerMissingStates[dlp.id][hash] {
if !dlp.missingStates[hash] {
results = append(results, data)
}
}
}
go dlp.dl.downloader.DeliverNodeData(dlp.id, results)
return nil
}
......@@ -639,21 +407,6 @@ func assertOwnForkedChain(t *testing.T, tester *downloadTester, common int, leng
if rs := len(tester.ownReceipts); rs != receipts {
t.Fatalf("synchronised receipts mismatch: have %v, want %v", rs, receipts)
}
// Verify the state trie too for fast syncs
/*if tester.downloader.mode == FastSync {
pivot := uint64(0)
var index int
if pivot := int(tester.downloader.queue.fastSyncPivot); pivot < common {
index = pivot
} else {
index = len(tester.ownHashes) - lengths[len(lengths)-1] + int(tester.downloader.queue.fastSyncPivot)
}
if index > 0 {
if statedb, err := state.New(tester.ownHeaders[tester.ownHashes[index]].Root, state.NewDatabase(trie.NewDatabase(tester.stateDb))); statedb == nil || err != nil {
t.Fatalf("state reconstruction failed: %v", err)
}
}
}*/
}
// Tests that simple synchronization against a canonical chain works correctly.
......@@ -673,16 +426,14 @@ func testCanonicalSynchronisation(t *testing.T, protocol int, mode SyncMode) {
defer tester.terminate()
// Create a small enough block chain to download
targetBlocks := blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
tester.newPeer("peer", protocol, hashes, headers, blocks, receipts)
chain := testChainBase.shorten(blockCacheItems - 15)
tester.newPeer("peer", protocol, chain)
// Synchronise with the peer and make sure all relevant data was retrieved
if err := tester.sync("peer", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, targetBlocks+1)
assertOwnChain(t, tester, chain.len())
}
// Tests that if a large batch of blocks are being downloaded, it is throttled
......@@ -699,10 +450,8 @@ func testThrottling(t *testing.T, protocol int, mode SyncMode) {
defer tester.terminate()
// Create a long block chain to download and the tester
targetBlocks := 8 * blockCacheItems
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
tester.newPeer("peer", protocol, hashes, headers, blocks, receipts)
targetBlocks := testChainBase.len() - 1
tester.newPeer("peer", protocol, testChainBase)
// Wrap the importer to allow stepping
blocked, proceed := uint32(0), make(chan struct{})
......@@ -734,9 +483,7 @@ func testThrottling(t *testing.T, protocol int, mode SyncMode) {
cached = len(tester.downloader.queue.blockDonePool)
if mode == FastSync {
if receipts := len(tester.downloader.queue.receiptDonePool); receipts < cached {
//if tester.downloader.queue.resultCache[receipts].Header.Number.Uint64() < tester.downloader.queue.fastSyncPivot {
cached = receipts
//}
}
}
frozen = int(atomic.LoadUint32(&blocked))
......@@ -786,24 +533,22 @@ func testForkedSync(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a long enough forked chain
common, fork := MaxHashFetch, 2*MaxHashFetch
hashesA, hashesB, headersA, headersB, blocksA, blocksB, receiptsA, receiptsB := tester.makeChainFork(common+fork, fork, tester.genesis, nil, true)
tester.newPeer("fork A", protocol, hashesA, headersA, blocksA, receiptsA)
tester.newPeer("fork B", protocol, hashesB, headersB, blocksB, receiptsB)
chainA := testChainForkLightA.shorten(testChainBase.len() + 80)
chainB := testChainForkLightB.shorten(testChainBase.len() + 80)
tester.newPeer("fork A", protocol, chainA)
tester.newPeer("fork B", protocol, chainB)
// Synchronise with the peer and make sure all blocks were retrieved
if err := tester.sync("fork A", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, common+fork+1)
assertOwnChain(t, tester, chainA.len())
// Synchronise with the second peer and make sure that fork is pulled too
if err := tester.sync("fork B", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnForkedChain(t, tester, common+1, []int{common + fork + 1, common + fork + 1})
assertOwnForkedChain(t, tester, testChainBase.len(), []int{chainA.len(), chainB.len()})
}
// Tests that synchronising against a much shorter but much heavyer fork works
......@@ -821,24 +566,22 @@ func testHeavyForkedSync(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a long enough forked chain
common, fork := MaxHashFetch, 4*MaxHashFetch
hashesA, hashesB, headersA, headersB, blocksA, blocksB, receiptsA, receiptsB := tester.makeChainFork(common+fork, fork, tester.genesis, nil, false)
tester.newPeer("light", protocol, hashesA, headersA, blocksA, receiptsA)
tester.newPeer("heavy", protocol, hashesB[fork/2:], headersB, blocksB, receiptsB)
chainA := testChainForkLightA.shorten(testChainBase.len() + 80)
chainB := testChainForkHeavy.shorten(testChainBase.len() + 80)
tester.newPeer("light", protocol, chainA)
tester.newPeer("heavy", protocol, chainB)
// Synchronise with the peer and make sure all blocks were retrieved
if err := tester.sync("light", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, common+fork+1)
assertOwnChain(t, tester, chainA.len())
// Synchronise with the second peer and make sure that fork is pulled too
if err := tester.sync("heavy", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnForkedChain(t, tester, common+1, []int{common + fork + 1, common + fork/2 + 1})
assertOwnForkedChain(t, tester, testChainBase.len(), []int{chainA.len(), chainB.len()})
}
// Tests that chain forks are contained within a certain interval of the current
......@@ -857,18 +600,16 @@ func testBoundedForkedSync(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a long enough forked chain
common, fork := 13, int(MaxForkAncestry+17)
hashesA, hashesB, headersA, headersB, blocksA, blocksB, receiptsA, receiptsB := tester.makeChainFork(common+fork, fork, tester.genesis, nil, true)
tester.newPeer("original", protocol, hashesA, headersA, blocksA, receiptsA)
tester.newPeer("rewriter", protocol, hashesB, headersB, blocksB, receiptsB)
chainA := testChainForkLightA
chainB := testChainForkLightB
tester.newPeer("original", protocol, chainA)
tester.newPeer("rewriter", protocol, chainB)
// Synchronise with the peer and make sure all blocks were retrieved
if err := tester.sync("original", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, common+fork+1)
assertOwnChain(t, tester, chainA.len())
// Synchronise with the second peer and ensure that the fork is rejected to being too old
if err := tester.sync("rewriter", nil, mode); err != errInvalidAncestor {
......@@ -893,17 +634,16 @@ func testBoundedHeavyForkedSync(t *testing.T, protocol int, mode SyncMode) {
defer tester.terminate()
// Create a long enough forked chain
common, fork := 13, int(MaxForkAncestry+17)
hashesA, hashesB, headersA, headersB, blocksA, blocksB, receiptsA, receiptsB := tester.makeChainFork(common+fork, fork, tester.genesis, nil, false)
tester.newPeer("original", protocol, hashesA, headersA, blocksA, receiptsA)
tester.newPeer("heavy-rewriter", protocol, hashesB[MaxForkAncestry-17:], headersB, blocksB, receiptsB) // Root the fork below the ancestor limit
chainA := testChainForkLightA
chainB := testChainForkHeavy
tester.newPeer("original", protocol, chainA)
tester.newPeer("heavy-rewriter", protocol, chainB)
// Synchronise with the peer and make sure all blocks were retrieved
if err := tester.sync("original", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, common+fork+1)
assertOwnChain(t, tester, chainA.len())
// Synchronise with the second peer and ensure that the fork is rejected to being too old
if err := tester.sync("heavy-rewriter", nil, mode); err != errInvalidAncestor {
......@@ -924,7 +664,7 @@ func TestInactiveDownloader62(t *testing.T) {
t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive)
}
if err := tester.downloader.DeliverBodies("bad peer", [][]*types.Transaction{}, [][]*types.Header{}); err != errNoSyncActive {
t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive)
t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive)
}
}
......@@ -962,17 +702,8 @@ func testCancel(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a small enough block chain to download and the tester
targetBlocks := blockCacheItems - 15
if targetBlocks >= MaxHashFetch {
targetBlocks = MaxHashFetch - 15
}
if targetBlocks >= MaxHeaderFetch {
targetBlocks = MaxHeaderFetch - 15
}
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
tester.newPeer("peer", protocol, hashes, headers, blocks, receipts)
chain := testChainBase.shorten(MaxHeaderFetch)
tester.newPeer("peer", protocol, chain)
// Make sure canceling works with a pristine downloader
tester.downloader.Cancel()
......@@ -1005,17 +736,16 @@ func testMultiSynchronisation(t *testing.T, protocol int, mode SyncMode) {
// Create various peers with various parts of the chain
targetPeers := 8
targetBlocks := targetPeers*blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
chain := testChainBase.shorten(targetPeers * 100)
for i := 0; i < targetPeers; i++ {
id := fmt.Sprintf("peer #%d", i)
tester.newPeer(id, protocol, hashes[i*blockCacheItems:], headers, blocks, receipts)
tester.newPeer(id, protocol, chain.shorten(chain.len()/(i+1)))
}
if err := tester.sync("peer #0", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, targetBlocks+1)
assertOwnChain(t, tester, chain.len())
}
// Tests that synchronisations behave well in multi-version protocol environments
......@@ -1034,24 +764,23 @@ func testMultiProtoSync(t *testing.T, protocol int, mode SyncMode) {
defer tester.terminate()
// Create a small enough block chain to download
targetBlocks := blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
chain := testChainBase.shorten(blockCacheItems - 15)
// Create peers of every type
tester.newPeer("peer 62", 62, hashes, headers, blocks, nil)
tester.newPeer("peer 63", 63, hashes, headers, blocks, receipts)
tester.newPeer("peer 64", 64, hashes, headers, blocks, receipts)
tester.newPeer("peer 62", 62, chain)
tester.newPeer("peer 63", 63, chain)
tester.newPeer("peer 64", 64, chain)
// Synchronise with the requested peer and make sure all blocks were retrieved
if err := tester.sync(fmt.Sprintf("peer %d", protocol), nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, targetBlocks+1)
assertOwnChain(t, tester, chain.len())
// Check that no peers have been dropped off
for _, version := range []int{62, 63, 64} {
peer := fmt.Sprintf("peer %d", version)
if _, ok := tester.peerHashes[peer]; !ok {
if _, ok := tester.peers[peer]; !ok {
t.Errorf("%s dropped", peer)
}
}
......@@ -1073,10 +802,8 @@ func testEmptyShortCircuit(t *testing.T, protocol int, mode SyncMode) {
defer tester.terminate()
// Create a block chain to download
targetBlocks := 2*blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
tester.newPeer("peer", protocol, hashes, headers, blocks, receipts)
chain := testChainBase
tester.newPeer("peer", protocol, chain)
// Instrument the downloader to signal body requests
bodiesHave, receiptsHave := int32(0), int32(0)
......@@ -1090,16 +817,16 @@ func testEmptyShortCircuit(t *testing.T, protocol int, mode SyncMode) {
if err := tester.sync("peer", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, targetBlocks+1)
assertOwnChain(t, tester, chain.len())
// Validate the number of block bodies that should have been requested
bodiesNeeded, receiptsNeeded := 0, 0
for _, block := range blocks {
for _, block := range chain.blockm {
if mode != LightSync && block != tester.genesis && (len(block.Transactions()) > 0 || len(block.Uncles()) > 0) {
bodiesNeeded++
}
}
for _, receipt := range receipts {
for _, receipt := range chain.receiptm {
if mode == FastSync && len(receipt) > 0 {
receiptsNeeded++
}
......@@ -1127,24 +854,20 @@ func testMissingHeaderAttack(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a small enough block chain to download
targetBlocks := blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
// Attempt a full sync with an attacker feeding gapped headers
tester.newPeer("attack", protocol, hashes, headers, blocks, receipts)
missing := targetBlocks / 2
delete(tester.peerHeaders["attack"], hashes[missing])
chain := testChainBase.shorten(blockCacheItems - 15)
brokenChain := chain.shorten(chain.len())
delete(brokenChain.headerm, brokenChain.chain[brokenChain.len()/2])
tester.newPeer("attack", protocol, brokenChain)
if err := tester.sync("attack", nil, mode); err == nil {
t.Fatalf("succeeded attacker synchronisation")
}
// Synchronise with the valid peer and make sure sync succeeds
tester.newPeer("valid", protocol, hashes, headers, blocks, receipts)
tester.newPeer("valid", protocol, chain)
if err := tester.sync("valid", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, targetBlocks+1)
assertOwnChain(t, tester, chain.len())
}
// Tests that if requested headers are shifted (i.e. first is missing), the queue
......@@ -1162,25 +885,24 @@ func testShiftedHeaderAttack(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a small enough block chain to download
targetBlocks := blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
chain := testChainBase.shorten(blockCacheItems - 15)
// Attempt a full sync with an attacker feeding shifted headers
tester.newPeer("attack", protocol, hashes, headers, blocks, receipts)
delete(tester.peerHeaders["attack"], hashes[len(hashes)-2])
delete(tester.peerBlocks["attack"], hashes[len(hashes)-2])
delete(tester.peerReceipts["attack"], hashes[len(hashes)-2])
brokenChain := chain.shorten(chain.len())
delete(brokenChain.headerm, brokenChain.chain[1])
delete(brokenChain.blockm, brokenChain.chain[1])
delete(brokenChain.receiptm, brokenChain.chain[1])
tester.newPeer("attack", protocol, brokenChain)
if err := tester.sync("attack", nil, mode); err == nil {
t.Fatalf("succeeded attacker synchronisation")
}
// Synchronise with the valid peer and make sure sync succeeds
tester.newPeer("valid", protocol, hashes, headers, blocks, receipts)
tester.newPeer("valid", protocol, chain)
if err := tester.sync("valid", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
assertOwnChain(t, tester, targetBlocks+1)
assertOwnChain(t, tester, chain.len())
}
// Tests that upon detecting an invalid header, the recent ones are rolled back
......@@ -1198,13 +920,14 @@ func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
// Create a small enough block chain to download
targetBlocks := 3*fsHeaderSafetyNet + 256 + fsMinFullBlocks
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
chain := testChainBase.shorten(targetBlocks)
// Attempt to sync with an attacker that feeds junk during the fast sync phase.
// This should result in the last fsHeaderSafetyNet headers being rolled back.
tester.newPeer("fast-attack", protocol, hashes, headers, blocks, receipts)
missing := fsHeaderSafetyNet + MaxHeaderFetch + 1
delete(tester.peerHeaders["fast-attack"], hashes[len(hashes)-missing])
fastAttackChain := chain.shorten(chain.len())
delete(fastAttackChain.headerm, fastAttackChain.chain[missing])
tester.newPeer("fast-attack", protocol, fastAttackChain)
if err := tester.sync("fast-attack", nil, mode); err == nil {
t.Fatalf("succeeded fast attacker synchronisation")
......@@ -1212,13 +935,15 @@ func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
if head := tester.CurrentHeader().Number.Int64(); int(head) > MaxHeaderFetch {
t.Errorf("rollback head mismatch: have %v, want at most %v", head, MaxHeaderFetch)
}
// Attempt to sync with an attacker that feeds junk during the block import phase.
// This should result in both the last fsHeaderSafetyNet number of headers being
// rolled back, and also the pivot point being reverted to a non-block status.
tester.newPeer("block-attack", protocol, hashes, headers, blocks, receipts)
missing = 3*fsHeaderSafetyNet + MaxHeaderFetch + 1
delete(tester.peerHeaders["fast-attack"], hashes[len(hashes)-missing]) // Make sure the fast-attacker doesn't fill in
delete(tester.peerHeaders["block-attack"], hashes[len(hashes)-missing])
blockAttackChain := chain.shorten(chain.len())
delete(fastAttackChain.headerm, fastAttackChain.chain[missing]) // Make sure the fast-attacker doesn't fill in
delete(blockAttackChain.headerm, blockAttackChain.chain[missing])
tester.newPeer("block-attack", protocol, blockAttackChain)
if err := tester.sync("block-attack", nil, mode); err == nil {
t.Fatalf("succeeded block attacker synchronisation")
......@@ -1231,19 +956,18 @@ func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
t.Errorf("fast sync pivot block #%d not rolled back", head)
}
}
// Attempt to sync with an attacker that withholds promised blocks after the
// fast sync pivot point. This could be a trial to leave the node with a bad
// but already imported pivot block.
tester.newPeer("withhold-attack", protocol, hashes, headers, blocks, receipts)
missing = 3*fsHeaderSafetyNet + MaxHeaderFetch + 1
withholdAttackChain := chain.shorten(chain.len())
tester.newPeer("withhold-attack", protocol, withholdAttackChain)
tester.downloader.syncInitHook = func(uint64, uint64) {
for i := missing; i <= len(hashes); i++ {
delete(tester.peerHeaders["withhold-attack"], hashes[len(hashes)-i])
for i := missing; i < withholdAttackChain.len(); i++ {
delete(withholdAttackChain.headerm, withholdAttackChain.chain[i])
}
tester.downloader.syncInitHook = nil
}
if err := tester.sync("withhold-attack", nil, mode); err == nil {
t.Fatalf("succeeded withholding attacker synchronisation")
}
......@@ -1255,20 +979,21 @@ func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
t.Errorf("fast sync pivot block #%d not rolled back", head)
}
}
// Synchronise with the valid peer and make sure sync succeeds. Since the last
// rollback should also disable fast syncing for this process, verify that we
// did a fresh full sync. Note, we can't assert anything about the receipts
// since we won't purge the database of them, hence we can't use assertOwnChain.
tester.newPeer("valid", protocol, hashes, headers, blocks, receipts)
// synchronise with the valid peer and make sure sync succeeds. Since the last rollback
// should also disable fast syncing for this process, verify that we did a fresh full
// sync. Note, we can't assert anything about the receipts since we won't purge the
// database of them, hence we can't use assertOwnChain.
tester.newPeer("valid", protocol, chain)
if err := tester.sync("valid", nil, mode); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
if hs := len(tester.ownHeaders); hs != len(headers) {
t.Fatalf("synchronised headers mismatch: have %v, want %v", hs, len(headers))
if hs := len(tester.ownHeaders); hs != chain.len() {
t.Fatalf("synchronised headers mismatch: have %v, want %v", hs, chain.len())
}
if mode != LightSync {
if bs := len(tester.ownBlocks); bs != len(blocks) {
t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, len(blocks))
if bs := len(tester.ownBlocks); bs != chain.len() {
t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, chain.len())
}
}
}
......@@ -1288,9 +1013,8 @@ func testHighTDStarvationAttack(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
hashes, headers, blocks, receipts := tester.makeChain(0, 0, tester.genesis, nil, false)
tester.newPeer("attack", protocol, []common.Hash{hashes[0]}, headers, blocks, receipts)
chain := testChainBase.shorten(1)
tester.newPeer("attack", protocol, chain)
if err := tester.sync("attack", big.NewInt(1000000), mode); err != errStallingPeer {
t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errStallingPeer)
}
......@@ -1333,21 +1057,22 @@ func testBlockHeaderAttackerDropping(t *testing.T, protocol int) {
// Run the tests and check disconnection status
tester := newTester()
defer tester.terminate()
chain := testChainBase.shorten(1)
for i, tt := range tests {
// Register a new peer and ensure it's presence
id := fmt.Sprintf("test %d", i)
if err := tester.newPeer(id, protocol, []common.Hash{tester.genesis.Hash()}, nil, nil, nil); err != nil {
if err := tester.newPeer(id, protocol, chain); err != nil {
t.Fatalf("test %d: failed to register new peer: %v", i, err)
}
if _, ok := tester.peerHashes[id]; !ok {
if _, ok := tester.peers[id]; !ok {
t.Fatalf("test %d: registered peer not found", i)
}
// Simulate a synchronisation and check the required result
tester.downloader.synchroniseMock = func(string, common.Hash) error { return tt.result }
tester.downloader.Synchronise(id, tester.genesis.Hash(), big.NewInt(1000), FullSync)
if _, ok := tester.peerHashes[id]; !ok != tt.drop {
if _, ok := tester.peers[id]; !ok != tt.drop {
t.Errorf("test %d: peer drop mismatch for %v: have %v, want %v", i, tt.result, !ok, tt.drop)
}
}
......@@ -1367,10 +1092,7 @@ func testSyncProgress(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a small enough block chain to download
targetBlocks := blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
chain := testChainBase.shorten(blockCacheItems - 15)
// Set a sync init hook to catch progress changes
starting := make(chan struct{})
......@@ -1380,12 +1102,10 @@ func testSyncProgress(t *testing.T, protocol int, mode SyncMode) {
starting <- struct{}{}
<-progress
}
// Retrieve the sync progress and ensure they are zero (pristine sync)
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock != 0 || progress.HighestBlock != 0 {
t.Fatalf("Pristine progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, 0, 0)
}
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
// Synchronise half the blocks and check initial progress
tester.newPeer("peer-half", protocol, hashes[targetBlocks/2:], headers, blocks, receipts)
tester.newPeer("peer-half", protocol, chain.shorten(chain.len()/2))
pending := new(sync.WaitGroup)
pending.Add(1)
......@@ -1396,16 +1116,15 @@ func testSyncProgress(t *testing.T, protocol int, mode SyncMode) {
}
}()
<-starting
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock != 0 || progress.HighestBlock != uint64(targetBlocks/2+1) {
t.Fatalf("Initial progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, 0, targetBlocks/2+1)
}
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
HighestBlock: uint64(chain.len()/2 - 1),
})
progress <- struct{}{}
pending.Wait()
// Synchronise all the blocks and check continuation progress
tester.newPeer("peer-full", protocol, hashes, headers, blocks, receipts)
tester.newPeer("peer-full", protocol, chain)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("peer-full", nil, mode); err != nil {
......@@ -1413,15 +1132,29 @@ func testSyncProgress(t *testing.T, protocol int, mode SyncMode) {
}
}()
<-starting
if progress := tester.downloader.Progress(); progress.StartingBlock != uint64(targetBlocks/2+1) || progress.CurrentBlock != uint64(targetBlocks/2+1) || progress.HighestBlock != uint64(targetBlocks) {
t.Fatalf("Completing progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, targetBlocks/2+1, targetBlocks/2+1, targetBlocks)
}
checkProgress(t, tester.downloader, "completing", ethereum.SyncProgress{
StartingBlock: uint64(chain.len()/2 - 1),
CurrentBlock: uint64(chain.len()/2 - 1),
HighestBlock: uint64(chain.len() - 1),
})
// Check final progress after successful sync
progress <- struct{}{}
pending.Wait()
checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
StartingBlock: uint64(chain.len()/2 - 1),
CurrentBlock: uint64(chain.len() - 1),
HighestBlock: uint64(chain.len() - 1),
})
}
// Check final progress after successful sync
if progress := tester.downloader.Progress(); progress.StartingBlock != uint64(targetBlocks/2+1) || progress.CurrentBlock != uint64(targetBlocks) || progress.HighestBlock != uint64(targetBlocks) {
t.Fatalf("Final progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, targetBlocks/2+1, targetBlocks, targetBlocks)
func checkProgress(t *testing.T, d *Downloader, stage string, want ethereum.SyncProgress) {
t.Helper()
p := d.Progress()
p.KnownStates, p.PulledStates = 0, 0
want.KnownStates, want.PulledStates = 0, 0
if p != want {
t.Fatalf("%s progress mismatch:\nhave %+v\nwant %+v", stage, p, want)
}
}
......@@ -1440,10 +1173,8 @@ func testForkedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a forked chain to simulate origin revertal
common, fork := MaxHashFetch, 2*MaxHashFetch
hashesA, hashesB, headersA, headersB, blocksA, blocksB, receiptsA, receiptsB := tester.makeChainFork(common+fork, fork, tester.genesis, nil, true)
chainA := testChainForkLightA.shorten(testChainBase.len() + MaxHashFetch)
chainB := testChainForkLightB.shorten(testChainBase.len() + MaxHashFetch)
// Set a sync init hook to catch progress changes
starting := make(chan struct{})
......@@ -1453,15 +1184,12 @@ func testForkedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
starting <- struct{}{}
<-progress
}
// Retrieve the sync progress and ensure they are zero (pristine sync)
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock != 0 || progress.HighestBlock != 0 {
t.Fatalf("Pristine progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, 0, 0)
}
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
// Synchronise with one of the forks and check progress
tester.newPeer("fork A", protocol, hashesA, headersA, blocksA, receiptsA)
tester.newPeer("fork A", protocol, chainA)
pending := new(sync.WaitGroup)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("fork A", nil, mode); err != nil {
......@@ -1469,9 +1197,10 @@ func testForkedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
}
}()
<-starting
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock != 0 || progress.HighestBlock != uint64(len(hashesA)-1) {
t.Fatalf("Initial progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, 0, len(hashesA)-1)
}
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
HighestBlock: uint64(chainA.len() - 1),
})
progress <- struct{}{}
pending.Wait()
......@@ -1479,9 +1208,8 @@ func testForkedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
tester.downloader.syncStatsChainOrigin = tester.downloader.syncStatsChainHeight
// Synchronise with the second fork and check progress resets
tester.newPeer("fork B", protocol, hashesB, headersB, blocksB, receiptsB)
tester.newPeer("fork B", protocol, chainB)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("fork B", nil, mode); err != nil {
......@@ -1489,16 +1217,20 @@ func testForkedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
}
}()
<-starting
if progress := tester.downloader.Progress(); progress.StartingBlock != uint64(common) || progress.CurrentBlock != uint64(len(hashesA)-1) || progress.HighestBlock != uint64(len(hashesB)-1) {
t.Fatalf("Forking progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, common, len(hashesA)-1, len(hashesB)-1)
}
progress <- struct{}{}
pending.Wait()
checkProgress(t, tester.downloader, "forking", ethereum.SyncProgress{
StartingBlock: uint64(testChainBase.len()) - 1,
CurrentBlock: uint64(chainA.len() - 1),
HighestBlock: uint64(chainB.len() - 1),
})
// Check final progress after successful sync
if progress := tester.downloader.Progress(); progress.StartingBlock != uint64(common) || progress.CurrentBlock != uint64(len(hashesB)-1) || progress.HighestBlock != uint64(len(hashesB)-1) {
t.Fatalf("Final progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, common, len(hashesB)-1, len(hashesB)-1)
}
progress <- struct{}{}
pending.Wait()
checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
StartingBlock: uint64(testChainBase.len()) - 1,
CurrentBlock: uint64(chainB.len() - 1),
HighestBlock: uint64(chainB.len() - 1),
})
}
// Tests that if synchronisation is aborted due to some failure, then the progress
......@@ -1516,10 +1248,7 @@ func testFailedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a small enough block chain to download
targetBlocks := blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks, 0, tester.genesis, nil, false)
chain := testChainBase.shorten(blockCacheItems - 15)
// Set a sync init hook to catch progress changes
starting := make(chan struct{})
......@@ -1529,20 +1258,18 @@ func testFailedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
starting <- struct{}{}
<-progress
}
// Retrieve the sync progress and ensure they are zero (pristine sync)
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock != 0 || progress.HighestBlock != 0 {
t.Fatalf("Pristine progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, 0, 0)
}
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
// Attempt a full sync with a faulty peer
tester.newPeer("faulty", protocol, hashes, headers, blocks, receipts)
missing := targetBlocks / 2
delete(tester.peerHeaders["faulty"], hashes[missing])
delete(tester.peerBlocks["faulty"], hashes[missing])
delete(tester.peerReceipts["faulty"], hashes[missing])
brokenChain := chain.shorten(chain.len())
missing := brokenChain.len() / 2
delete(brokenChain.headerm, brokenChain.chain[missing])
delete(brokenChain.blockm, brokenChain.chain[missing])
delete(brokenChain.receiptm, brokenChain.chain[missing])
tester.newPeer("faulty", protocol, brokenChain)
pending := new(sync.WaitGroup)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("faulty", nil, mode); err == nil {
......@@ -1550,16 +1277,17 @@ func testFailedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
}
}()
<-starting
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock != 0 || progress.HighestBlock != uint64(targetBlocks) {
t.Fatalf("Initial progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, 0, targetBlocks)
}
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
HighestBlock: uint64(brokenChain.len() - 1),
})
progress <- struct{}{}
pending.Wait()
afterFailedSync := tester.downloader.Progress()
// Synchronise with a good peer and check that the progress origin remind the same after a failure
tester.newPeer("valid", protocol, hashes, headers, blocks, receipts)
// Synchronise with a good peer and check that the progress origin remind the same
// after a failure
tester.newPeer("valid", protocol, chain)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("valid", nil, mode); err != nil {
......@@ -1567,16 +1295,15 @@ func testFailedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
}
}()
<-starting
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock > uint64(targetBlocks/2) || progress.HighestBlock != uint64(targetBlocks) {
t.Fatalf("Completing progress mismatch: have %v/%v/%v, want %v/0-%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, targetBlocks/2, targetBlocks)
}
progress <- struct{}{}
pending.Wait()
checkProgress(t, tester.downloader, "completing", afterFailedSync)
// Check final progress after successful sync
if progress := tester.downloader.Progress(); progress.StartingBlock > uint64(targetBlocks/2) || progress.CurrentBlock != uint64(targetBlocks) || progress.HighestBlock != uint64(targetBlocks) {
t.Fatalf("Final progress mismatch: have %v/%v/%v, want 0-%v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, targetBlocks/2, targetBlocks, targetBlocks)
}
progress <- struct{}{}
pending.Wait()
checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
CurrentBlock: uint64(chain.len() - 1),
HighestBlock: uint64(chain.len() - 1),
})
}
// Tests that if an attacker fakes a chain height, after the attack is detected,
......@@ -1593,34 +1320,27 @@ func testFakedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
tester := newTester()
defer tester.terminate()
// Create a small block chain
targetBlocks := blockCacheItems - 15
hashes, headers, blocks, receipts := tester.makeChain(targetBlocks+3, 0, tester.genesis, nil, false)
chain := testChainBase.shorten(blockCacheItems - 15)
// Set a sync init hook to catch progress changes
starting := make(chan struct{})
progress := make(chan struct{})
tester.downloader.syncInitHook = func(origin, latest uint64) {
starting <- struct{}{}
<-progress
}
// Retrieve the sync progress and ensure they are zero (pristine sync)
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock != 0 || progress.HighestBlock != 0 {
t.Fatalf("Pristine progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, 0, 0)
}
// Create and sync with an attacker that promises a higher chain than available
tester.newPeer("attack", protocol, hashes, headers, blocks, receipts)
for i := 1; i < 3; i++ {
delete(tester.peerHeaders["attack"], hashes[i])
delete(tester.peerBlocks["attack"], hashes[i])
delete(tester.peerReceipts["attack"], hashes[i])
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
// Create and sync with an attacker that promises a higher chain than available.
brokenChain := chain.shorten(chain.len())
numMissing := 5
for i := brokenChain.len() - 2; i > brokenChain.len()-numMissing; i-- {
delete(brokenChain.headerm, brokenChain.chain[i])
}
tester.newPeer("attack", protocol, brokenChain)
pending := new(sync.WaitGroup)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("attack", nil, mode); err == nil {
......@@ -1628,14 +1348,17 @@ func testFakedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
}
}()
<-starting
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock != 0 || progress.HighestBlock != uint64(targetBlocks+3) {
t.Fatalf("Initial progress mismatch: have %v/%v/%v, want %v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, 0, targetBlocks+3)
}
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
HighestBlock: uint64(brokenChain.len() - 1),
})
progress <- struct{}{}
pending.Wait()
afterFailedSync := tester.downloader.Progress()
// Synchronise with a good peer and check that the progress height has been reduced to the true value
tester.newPeer("valid", protocol, hashes[3:], headers, blocks, receipts)
// Synchronise with a good peer and check that the progress height has been reduced to
// the true value.
validChain := chain.shorten(chain.len() - numMissing)
tester.newPeer("valid", protocol, validChain)
pending.Add(1)
go func() {
......@@ -1645,23 +1368,25 @@ func testFakedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
}
}()
<-starting
if progress := tester.downloader.Progress(); progress.StartingBlock != 0 || progress.CurrentBlock > uint64(targetBlocks) || progress.HighestBlock != uint64(targetBlocks) {
t.Fatalf("Completing progress mismatch: have %v/%v/%v, want %v/0-%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, 0, targetBlocks, targetBlocks)
}
checkProgress(t, tester.downloader, "completing", ethereum.SyncProgress{
CurrentBlock: afterFailedSync.CurrentBlock,
HighestBlock: uint64(validChain.len() - 1),
})
// Check final progress after successful sync.
progress <- struct{}{}
pending.Wait()
// Check final progress after successful sync
if progress := tester.downloader.Progress(); progress.StartingBlock > uint64(targetBlocks) || progress.CurrentBlock != uint64(targetBlocks) || progress.HighestBlock != uint64(targetBlocks) {
t.Fatalf("Final progress mismatch: have %v/%v/%v, want 0-%v/%v/%v", progress.StartingBlock, progress.CurrentBlock, progress.HighestBlock, targetBlocks, targetBlocks, targetBlocks)
}
checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
CurrentBlock: uint64(validChain.len() - 1),
HighestBlock: uint64(validChain.len() - 1),
})
}
// This test reproduces an issue where unexpected deliveries would
// block indefinitely if they arrived at the right time.
// We use data driven subtests to manage this so that it will be parallel on its own
// and not with the other tests, avoiding intermittent failures.
func TestDeliverHeadersHang(t *testing.T) {
t.Parallel()
testCases := []struct {
protocol int
syncMode SyncMode
......@@ -1675,15 +1400,38 @@ func TestDeliverHeadersHang(t *testing.T) {
}
for _, tc := range testCases {
t.Run(fmt.Sprintf("protocol %d mode %v", tc.protocol, tc.syncMode), func(t *testing.T) {
t.Parallel()
testDeliverHeadersHang(t, tc.protocol, tc.syncMode)
})
}
}
func testDeliverHeadersHang(t *testing.T, protocol int, mode SyncMode) {
master := newTester()
defer master.terminate()
chain := testChainBase.shorten(15)
for i := 0; i < 200; i++ {
tester := newTester()
tester.peerDb = master.peerDb
tester.newPeer("peer", protocol, chain)
// Whenever the downloader requests headers, flood it with
// a lot of unrequested header deliveries.
tester.downloader.peers.peers["peer"].peer = &floodingTestPeer{
peer: tester.downloader.peers.peers["peer"].peer,
tester: tester,
}
if err := tester.sync("peer", nil, mode); err != nil {
t.Errorf("test %d: sync failed: %v", i, err)
}
tester.terminate()
}
}
type floodingTestPeer struct {
peer Peer
tester *downloadTester
pend sync.WaitGroup
}
func (ftp *floodingTestPeer) Head() (common.Hash, *big.Int) { return ftp.peer.Head() }
......@@ -1702,54 +1450,32 @@ func (ftp *floodingTestPeer) RequestNodeData(hashes []common.Hash) error {
func (ftp *floodingTestPeer) RequestHeadersByNumber(from uint64, count, skip int, reverse bool) error {
deliveriesDone := make(chan struct{}, 500)
for i := 0; i < cap(deliveriesDone); i++ {
for i := 0; i < cap(deliveriesDone)-1; i++ {
peer := fmt.Sprintf("fake-peer%d", i)
ftp.pend.Add(1)
go func() {
ftp.tester.downloader.DeliverHeaders(peer, []*types.Header{{}, {}, {}, {}})
deliveriesDone <- struct{}{}
ftp.pend.Done()
}()
}
// Deliver the actual requested headers.
go ftp.peer.RequestHeadersByNumber(from, count, skip, reverse)
// None of the extra deliveries should block.
timeout := time.After(60 * time.Second)
launched := false
for i := 0; i < cap(deliveriesDone); i++ {
select {
case <-deliveriesDone:
if !launched {
// Start delivering the requested headers
// after one of the flooding responses has arrived.
go func() {
ftp.peer.RequestHeadersByNumber(from, count, skip, reverse)
deliveriesDone <- struct{}{}
}()
launched = true
}
case <-timeout:
panic("blocked")
}
}
return nil
}
func testDeliverHeadersHang(t *testing.T, protocol int, mode SyncMode) {
t.Parallel()
master := newTester()
defer master.terminate()
hashes, headers, blocks, receipts := master.makeChain(5, 0, master.genesis, nil, false)
for i := 0; i < 200; i++ {
tester := newTester()
tester.peerDb = master.peerDb
tester.newPeer("peer", protocol, hashes, headers, blocks, receipts)
// Whenever the downloader requests headers, flood it with
// a lot of unrequested header deliveries.
tester.downloader.peers.peers["peer"].peer = &floodingTestPeer{
peer: tester.downloader.peers.peers["peer"].peer,
tester: tester,
}
if err := tester.sync("peer", nil, mode); err != nil {
t.Errorf("test %d: sync failed: %v", i, err)
}
tester.terminate()
// Flush all goroutines to prevent messing with subsequent tests
tester.downloader.peers.peers["peer"].peer.(*floodingTestPeer).pend.Wait()
}
}
eth/downloader/testchain_test.go 0 → 100644
View file @ 0bcff8f5
// 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 downloader
import (
"fmt"
"math/big"
"sync"
"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/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/params"
)
// Test chain parameters.
var (
testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
testAddress = crypto.PubkeyToAddress(testKey.PublicKey)
testDB = ethdb.NewMemDatabase()
testGenesis = core.GenesisBlockForTesting(testDB, testAddress, big.NewInt(1000000000))
)
// The common prefix of all test chains:
var testChainBase = newTestChain(blockCacheItems+200, testGenesis)
// Different forks on top of the base chain:
var testChainForkLightA, testChainForkLightB, testChainForkHeavy *testChain
func init() {
var forkLen = int(MaxForkAncestry + 50)
var wg sync.WaitGroup
wg.Add(3)
go func() { testChainForkLightA = testChainBase.makeFork(forkLen, false, 1); wg.Done() }()
go func() { testChainForkLightB = testChainBase.makeFork(forkLen, false, 2); wg.Done() }()
go func() { testChainForkHeavy = testChainBase.makeFork(forkLen, true, 3); wg.Done() }()
wg.Wait()
}
type testChain struct {
genesis *types.Block
chain []common.Hash
headerm map[common.Hash]*types.Header
blockm map[common.Hash]*types.Block
receiptm map[common.Hash][]*types.Receipt
tdm map[common.Hash]*big.Int
}
// newTestChain creates a blockchain of the given length.
func newTestChain(length int, genesis *types.Block) *testChain {
tc := new(testChain).copy(length)
tc.genesis = genesis
tc.chain = append(tc.chain, genesis.Hash())
tc.headerm[tc.genesis.Hash()] = tc.genesis.Header()
tc.tdm[tc.genesis.Hash()] = tc.genesis.Difficulty()
tc.blockm[tc.genesis.Hash()] = tc.genesis
tc.generate(length-1, 0, genesis, false)
return tc
}
// makeFork creates a fork on top of the test chain.
func (tc *testChain) makeFork(length int, heavy bool, seed byte) *testChain {
fork := tc.copy(tc.len() + length)
fork.generate(length, seed, tc.headBlock(), heavy)
return fork
}
// shorten creates a copy of the chain with the given length. It panics if the
// length is longer than the number of available blocks.
func (tc *testChain) shorten(length int) *testChain {
if length > tc.len() {
panic(fmt.Errorf("can't shorten test chain to %d blocks, it's only %d blocks long", length, tc.len()))
}
return tc.copy(length)
}
func (tc *testChain) copy(newlen int) *testChain {
cpy := &testChain{
genesis: tc.genesis,
headerm: make(map[common.Hash]*types.Header, newlen),
blockm: make(map[common.Hash]*types.Block, newlen),
receiptm: make(map[common.Hash][]*types.Receipt, newlen),
tdm: make(map[common.Hash]*big.Int, newlen),
}
for i := 0; i < len(tc.chain) && i < newlen; i++ {
hash := tc.chain[i]
cpy.chain = append(cpy.chain, tc.chain[i])
cpy.tdm[hash] = tc.tdm[hash]
cpy.blockm[hash] = tc.blockm[hash]
cpy.headerm[hash] = tc.headerm[hash]
cpy.receiptm[hash] = tc.receiptm[hash]
}
return cpy
}
// generate creates a chain of n blocks starting at and including parent.
// the returned hash chain is ordered head->parent. In addition, every 22th block
// contains a transaction and every 5th an uncle to allow testing correct block
// reassembly.
func (tc *testChain) generate(n int, seed byte, parent *types.Block, heavy bool) {
// start := time.Now()
// defer func() { fmt.Printf("test chain generated in %v\n", time.Since(start)) }()
blocks, receipts := core.GenerateChain(params.TestChainConfig, parent, ethash.NewFaker(), testDB, n, func(i int, block *core.BlockGen) {
block.SetCoinbase(common.Address{seed})
// If a heavy chain is requested, delay blocks to raise difficulty
if heavy {
block.OffsetTime(-1)
}
// Include transactions to the miner to make blocks more interesting.
if parent == tc.genesis && i%22 == 0 {
signer := types.MakeSigner(params.TestChainConfig, block.Number())
tx, err := types.SignTx(types.NewTransaction(block.TxNonce(testAddress), common.Address{seed}, big.NewInt(1000), params.TxGas, nil, nil), signer, testKey)
if err != nil {
panic(err)
}
block.AddTx(tx)
}
// if the block number is a multiple of 5, add a bonus uncle to the block
if i > 0 && i%5 == 0 {
block.AddUncle(&types.Header{
ParentHash: block.PrevBlock(i - 1).Hash(),
Number: big.NewInt(block.Number().Int64() - 1),
})
}
})
// Convert the block-chain into a hash-chain and header/block maps
td := new(big.Int).Set(tc.td(parent.Hash()))
for i, b := range blocks {
td := td.Add(td, b.Difficulty())
hash := b.Hash()
tc.chain = append(tc.chain, hash)
tc.blockm[hash] = b
tc.headerm[hash] = b.Header()
tc.receiptm[hash] = receipts[i]
tc.tdm[hash] = new(big.Int).Set(td)
}
}
// len returns the total number of blocks in the chain.
func (tc *testChain) len() int {
return len(tc.chain)
}
// headBlock returns the head of the chain.
func (tc *testChain) headBlock() *types.Block {
return tc.blockm[tc.chain[len(tc.chain)-1]]
}
// td returns the total difficulty of the given block.
func (tc *testChain) td(hash common.Hash) *big.Int {
return tc.tdm[hash]
}
// headersByHash returns headers in ascending order from the given hash.
func (tc *testChain) headersByHash(origin common.Hash, amount int, skip int) []*types.Header {
num, _ := tc.hashToNumber(origin)
return tc.headersByNumber(num, amount, skip)
}
// headersByNumber returns headers in ascending order from the given number.
func (tc *testChain) headersByNumber(origin uint64, amount int, skip int) []*types.Header {
result := make([]*types.Header, 0, amount)
for num := origin; num < uint64(len(tc.chain)) && len(result) < amount; num += uint64(skip) + 1 {
if header, ok := tc.headerm[tc.chain[int(num)]]; ok {
result = append(result, header)
}
}
return result
}
// receipts returns the receipts of the given block hashes.
func (tc *testChain) receipts(hashes []common.Hash) [][]*types.Receipt {
results := make([][]*types.Receipt, 0, len(hashes))
for _, hash := range hashes {
if receipt, ok := tc.receiptm[hash]; ok {
results = append(results, receipt)
}
}
return results
}
// bodies returns the block bodies of the given block hashes.
func (tc *testChain) bodies(hashes []common.Hash) ([][]*types.Transaction, [][]*types.Header) {
transactions := make([][]*types.Transaction, 0, len(hashes))
uncles := make([][]*types.Header, 0, len(hashes))
for _, hash := range hashes {
if block, ok := tc.blockm[hash]; ok {
transactions = append(transactions, block.Transactions())
uncles = append(uncles, block.Uncles())
}
}
return transactions, uncles
}
func (tc *testChain) hashToNumber(target common.Hash) (uint64, bool) {
for num, hash := range tc.chain {
if hash == target {
return uint64(num), true
}
}
return 0, false
}
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