// Handshake executes the eth protocol handshake, negotiating version number,
// network IDs, difficulties, head and genesis blocks.
func (p *peer) Handshake(network int, td *big.Int, head common.Hash, genesis common.Hash) error {
// Send out own handshake in a new thread
errc := make(chan error, 2)
var status statusData // safe to read after two values have been received from errc
go func() {
errc <- p2p.Send(p.rw, StatusMsg, &statusData{
ProtocolVersion: uint32(p.version),
NetworkId: uint32(network),
TD: td,
CurrentBlock: head,
GenesisBlock: genesis,
})
}()
go func() {
errc <- p.readStatus(network, &status, genesis)
}()
timeout := time.NewTimer(handshakeTimeout)
defer timeout.Stop()
for i := 0; i < 2; i++ {
select {
case err := <-errc:
if err != nil {
return err
}
case <-timeout.C:
return p2p.DiscReadTimeout
}
}
p.td, p.head = status.TD, status.CurrentBlock
return nil
}
// SendBlocks sends a batch of blocks to the remote peer.
func (p *peer) SendBlocks(blocks []*types.Block) error {
reqBlockOutPacketsMeter.Mark(1)
for _, block := range blocks {
reqBlockOutTrafficMeter.Mark(block.Size().Int64())
}
return p2p.Send(p.rw, BlocksMsg, blocks)
}
// sendTransactions sends transactions to the peer and includes the hashes
// in it's tx hash set for future reference. The tx hash will allow the
// manager to check whether the peer has already received this particular
// transaction
func (p *peer) sendTransactions(txs types.Transactions) error {
for _, tx := range txs {
p.txHashes.Add(tx.Hash())
}
return p2p.Send(p.rw, TxMsg, txs)
}
// SendNewBlock propagates an entire block to a remote peer.
func (p *peer) SendNewBlock(block *types.Block, td *big.Int) error {
propBlockOutPacketsMeter.Mark(1)
propBlockOutTrafficMeter.Mark(block.Size().Int64())
p.knownBlocks.Add(block.Hash())
return p2p.Send(p.rw, NewBlockMsg, []interface{}{block, td})
}
// SendTransactions sends transactions to the peer and includes the hashes
// in its transaction hash set for future reference.
func (p *peer) SendTransactions(txs types.Transactions) error {
propTxnOutPacketsMeter.Mark(1)
for _, tx := range txs {
propTxnOutTrafficMeter.Mark(tx.Size().Int64())
p.knownTxs.Add(tx.Hash())
}
return p2p.Send(p.rw, TxMsg, txs)
}
// SendNewBlockHashes announces the availability of a number of blocks through
// a hash notification.
func (p *peer) SendNewBlockHashes(hashes []common.Hash) error {
propHashOutPacketsMeter.Mark(1)
propHashOutTrafficMeter.Mark(int64(32 * len(hashes)))
for _, hash := range hashes {
p.knownBlocks.Add(hash)
}
return p2p.Send(p.rw, NewBlockHashesMsg, hashes)
}
func testGetReceipt(t *testing.T, protocol int) {
// Define three accounts to simulate transactions with
acc1Key, _ := crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
acc2Key, _ := crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
acc1Addr := crypto.PubkeyToAddress(acc1Key.PublicKey)
acc2Addr := crypto.PubkeyToAddress(acc2Key.PublicKey)
// Create a chain generator with some simple transactions (blatantly stolen from @fjl/chain_makerts_test)
generator := func(i int, block *core.BlockGen) {
switch i {
case 0:
// In block 1, the test bank sends account #1 some ether.
tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(testBankKey)
block.AddTx(tx)
case 1:
// In block 2, the test bank sends some more ether to account #1.
// acc1Addr passes it on to account #2.
tx1, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(testBankKey)
tx2, _ := types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(acc1Key)
block.AddTx(tx1)
block.AddTx(tx2)
case 2:
// Block 3 is empty but was mined by account #2.
block.SetCoinbase(acc2Addr)
block.SetExtra([]byte("yeehaw"))
case 3:
// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
b2 := block.PrevBlock(1).Header()
b2.Extra = []byte("foo")
block.AddUncle(b2)
b3 := block.PrevBlock(2).Header()
b3.Extra = []byte("foo")
block.AddUncle(b3)
}
}
// Assemble the test environment
pm := newTestProtocolManager(4, generator, nil)
peer, _ := newTestPeer("peer", protocol, pm, true)
defer peer.close()
// Collect the hashes to request, and the response to expect
hashes := []common.Hash{}
for i := uint64(0); i <= pm.chainman.CurrentBlock().NumberU64(); i++ {
for _, tx := range pm.chainman.GetBlockByNumber(i).Transactions() {
hashes = append(hashes, tx.Hash())
}
}
receipts := make([]*types.Receipt, len(hashes))
for i, hash := range hashes {
receipts[i] = core.GetReceipt(pm.chaindb, hash)
}
// Send the hash request and verify the response
p2p.Send(peer.app, 0x0f, hashes)
if err := p2p.ExpectMsg(peer.app, 0x10, receipts); err != nil {
t.Errorf("receipts mismatch: %v", err)
}
}
func TestPeerDeliver(t *testing.T) {
// Start a tester and execute the handshake
tester, err := startTestPeerInited()
if err != nil {
t.Fatalf("failed to start initialized peer: %v", err)
}
defer tester.stream.Close()
// Watch for all inbound messages
arrived := make(chan struct{}, 1)
tester.client.Watch(Filter{
Fn: func(message *Message) {
arrived <- struct{}{}
},
})
// Construct a message and deliver it to the tester peer
message := NewMessage([]byte("peer broadcast test message"))
envelope, err := message.Wrap(DefaultPoW, Options{
TTL: DefaultTTL,
})
if err != nil {
t.Fatalf("failed to wrap message: %v", err)
}
if err := p2p.Send(tester.stream, messagesCode, []*Envelope{envelope}); err != nil {
t.Fatalf("failed to transfer message: %v", err)
}
// Check that the message is delivered upstream
select {
case <-arrived:
case <-time.After(time.Second):
t.Fatalf("message delivery timeout")
}
// Check that a resend is not delivered
if err := p2p.Send(tester.stream, messagesCode, []*Envelope{envelope}); err != nil {
t.Fatalf("failed to transfer message: %v", err)
}
select {
case <-time.After(2 * transmissionCycle):
case <-arrived:
t.Fatalf("repeating message arrived")
}
}
// SendNewBlockHashes announces the availability of a number of blocks through
// a hash notification.
func (p *peer) SendNewBlockHashes(hashes []common.Hash, numbers []uint64) error {
for _, hash := range hashes {
p.knownBlocks.Add(hash)
}
request := make(newBlockHashesData, len(hashes))
for i := 0; i < len(hashes); i++ {
request[i].Hash = hashes[i]
request[i].Number = numbers[i]
}
return p2p.Send(p.rw, NewBlockHashesMsg, request)
}
// handshake simulates a trivial handshake that expects the same state from the
// remote side as we are simulating locally.
func (p *testPeer) handshake(t *testing.T, td *big.Int, head common.Hash, genesis common.Hash) {
msg := &statusData{
ProtocolVersion: uint32(p.version),
NetworkId: uint32(NetworkId),
TD: td,
CurrentBlock: head,
GenesisBlock: genesis,
}
if err := p2p.ExpectMsg(p.app, StatusMsg, msg); err != nil {
t.Fatalf("status recv: %v", err)
}
if err := p2p.Send(p.app, StatusMsg, msg); err != nil {
t.Fatalf("status send: %v", err)
}
}
func (p *testPeer) handshake(t *testing.T) {
td, currentBlock, genesis := p.pm.chainman.Status()
msg := &statusMsgData{
ProtocolVersion: uint32(p.pm.protVer),
NetworkId: uint32(p.pm.netId),
TD: td,
CurrentBlock: currentBlock,
GenesisBlock: genesis,
}
if err := p2p.ExpectMsg(p, StatusMsg, msg); err != nil {
t.Fatalf("status recv: %v", err)
}
if err := p2p.Send(p, StatusMsg, msg); err != nil {
t.Fatalf("status send: %v", err)
}
}
func (p *peer) handleStatus() error {
errc := make(chan error, 1)
go func() {
errc <- p2p.Send(p.rw, StatusMsg, &statusMsgData{
ProtocolVersion: uint32(p.protv),
NetworkId: uint32(p.netid),
TD: p.ourTd,
CurrentBlock: p.ourHash,
GenesisBlock: p.genesis,
})
}()
// read and handle remote status
msg, err := p.rw.ReadMsg()
if err != nil {
return err
}
if msg.Code != StatusMsg {
return errResp(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
}
if msg.Size > ProtocolMaxMsgSize {
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
var status statusMsgData
if err := msg.Decode(&status); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
if status.GenesisBlock != p.genesis {
return errResp(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, p.genesis)
}
if int(status.NetworkId) != p.netid {
return errResp(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, p.netid)
}
if int(status.ProtocolVersion) != p.protv {
return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, p.protv)
}
// Set the total difficulty of the peer
p.td = status.TD
// set the best hash of the peer
p.recentHash = status.CurrentBlock
return <-errc
}
func TestStatusMsgErrors(t *testing.T) {
pm := newProtocolManagerForTesting(nil)
td, currentBlock, genesis := pm.chainman.Status()
defer pm.Stop()
tests := []struct {
code uint64
data interface{}
wantError error
}{
{
code: TxMsg, data: []interface{}{},
wantError: errResp(ErrNoStatusMsg, "first msg has code 2 (!= 0)"),
},
{
code: StatusMsg, data: statusMsgData{10, NetworkId, td, currentBlock, genesis},
wantError: errResp(ErrProtocolVersionMismatch, "10 (!= 0)"),
},
{
code: StatusMsg, data: statusMsgData{ProtocolVersion, 999, td, currentBlock, genesis},
wantError: errResp(ErrNetworkIdMismatch, "999 (!= 0)"),
},
{
code: StatusMsg, data: statusMsgData{ProtocolVersion, NetworkId, td, currentBlock, common.Hash{3}},
wantError: errResp(ErrGenesisBlockMismatch, "0300000000000000000000000000000000000000000000000000000000000000 (!= %x)", genesis),
},
}
for i, test := range tests {
p, errc := newTestPeer(pm)
// The send call might hang until reset because
// the protocol might not read the payload.
go p2p.Send(p, test.code, test.data)
select {
case err := <-errc:
if err == nil {
t.Errorf("test %d: protocol returned nil error, want %q", test.wantError)
} else if err.Error() != test.wantError.Error() {
t.Errorf("test %d: wrong error: got %q, want %q", i, err, test.wantError)
}
case <-time.After(2 * time.Second):
t.Errorf("protocol did not shut down withing 2 seconds")
}
p.close()
}
}
// broadcast iterates over the collection of envelopes and transmits yet unknown
// ones over the network.
func (self *peer) broadcast() error {
// Fetch the envelopes and collect the unknown ones
envelopes := self.host.envelopes()
transmit := make([]*Envelope, 0, len(envelopes))
for _, envelope := range envelopes {
if !self.marked(envelope) {
transmit = append(transmit, envelope)
self.mark(envelope)
}
}
// Transmit the unknown batch (potentially empty)
if err := p2p.Send(self.ws, messagesCode, transmit); err != nil {
return err
}
glog.V(logger.Detail).Infoln(self.peer, "broadcasted", len(transmit), "message(s)")
return nil
}
// Handshake executes the eth protocol handshake, negotiating version number,
// network IDs, difficulties, head and genesis blocks.
func (p *peer) Handshake(td *big.Int, head common.Hash, genesis common.Hash) error {
// Send out own handshake in a new thread
errc := make(chan error, 1)
go func() {
errc <- p2p.Send(p.rw, StatusMsg, &statusData{
ProtocolVersion: uint32(p.version),
NetworkId: uint32(p.network),
TD: td,
CurrentBlock: head,
GenesisBlock: genesis,
})
}()
// In the mean time retrieve the remote status message
msg, err := p.rw.ReadMsg()
if err != nil {
return err
}
if msg.Code != StatusMsg {
return errResp(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
}
if msg.Size > ProtocolMaxMsgSize {
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
// Decode the handshake and make sure everything matches
var status statusData
if err := msg.Decode(&status); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
if status.GenesisBlock != genesis {
return errResp(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesis)
}
if int(status.NetworkId) != p.network {
return errResp(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, p.network)
}
if int(status.ProtocolVersion) != p.version {
return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, p.version)
}
// Configure the remote peer, and sanity check out handshake too
p.td, p.head = status.TD, status.CurrentBlock
return <-errc
}
func testRecvTransactions(t *testing.T, protocol int) {
txAdded := make(chan []*types.Transaction)
pm := newTestProtocolManagerMust(t, false, 0, nil, txAdded)
p, _ := newTestPeer("peer", protocol, pm, true)
defer pm.Stop()
defer p.close()
tx := newTestTransaction(testAccount, 0, 0)
if err := p2p.Send(p.app, TxMsg, []interface{}{tx}); err != nil {
t.Fatalf("send error: %v", err)
}
select {
case added := <-txAdded:
if len(added) != 1 {
t.Errorf("wrong number of added transactions: got %d, want 1", len(added))
} else if added[0].Hash() != tx.Hash() {
t.Errorf("added wrong tx hash: got %v, want %v", added[0].Hash(), tx.Hash())
}
case <-time.After(2 * time.Second):
t.Errorf("no TxPreEvent received within 2 seconds")
}
}
func testGetBlockHashes(t *testing.T, protocol int) {
pm := newTestProtocolManagerMust(t, false, downloader.MaxHashFetch+15, nil, nil)
peer, _ := newTestPeer("peer", protocol, pm, true)
defer peer.close()
// Create a batch of tests for various scenarios
limit := downloader.MaxHashFetch
tests := []struct {
origin common.Hash
number int
result int
}{
{common.Hash{}, 1, 0}, // Make sure non existent hashes don't return results
{pm.blockchain.Genesis().Hash(), 1, 0}, // There are no hashes to retrieve up from the genesis
{pm.blockchain.GetBlockByNumber(5).Hash(), 5, 5}, // All the hashes including the genesis requested
{pm.blockchain.GetBlockByNumber(5).Hash(), 10, 5}, // More hashes than available till the genesis requested
{pm.blockchain.GetBlockByNumber(100).Hash(), 10, 10}, // All hashes available from the middle of the chain
{pm.blockchain.CurrentBlock().Hash(), 10, 10}, // All hashes available from the head of the chain
{pm.blockchain.CurrentBlock().Hash(), limit, limit}, // Request the maximum allowed hash count
{pm.blockchain.CurrentBlock().Hash(), limit + 1, limit}, // Request more than the maximum allowed hash count
}
// Run each of the tests and verify the results against the chain
for i, tt := range tests {
// Assemble the hash response we would like to receive
resp := make([]common.Hash, tt.result)
if len(resp) > 0 {
from := pm.blockchain.GetBlock(tt.origin).NumberU64() - 1
for j := 0; j < len(resp); j++ {
resp[j] = pm.blockchain.GetBlockByNumber(uint64(int(from) - j)).Hash()
}
}
// Send the hash request and verify the response
p2p.Send(peer.app, 0x03, getBlockHashesData{tt.origin, uint64(tt.number)})
if err := p2p.ExpectMsg(peer.app, 0x04, resp); err != nil {
t.Errorf("test %d: block hashes mismatch: %v", i, err)
}
}
}
func testGetBlockHashesFromNumber(t *testing.T, protocol int) {
pm := newTestProtocolManagerMust(t, false, downloader.MaxHashFetch+15, nil, nil)
peer, _ := newTestPeer("peer", protocol, pm, true)
defer peer.close()
// Create a batch of tests for various scenarios
limit := downloader.MaxHashFetch
tests := []struct {
origin uint64
number int
result int
}{
{pm.blockchain.CurrentBlock().NumberU64() + 1, 1, 0}, // Out of bounds requests should return empty
{pm.blockchain.CurrentBlock().NumberU64(), 1, 1}, // Make sure the head hash can be retrieved
{pm.blockchain.CurrentBlock().NumberU64() - 4, 5, 5}, // All hashes, including the head hash requested
{pm.blockchain.CurrentBlock().NumberU64() - 4, 10, 5}, // More hashes requested than available till the head
{pm.blockchain.CurrentBlock().NumberU64() - 100, 10, 10}, // All hashes available from the middle of the chain
{0, 10, 10}, // All hashes available from the root of the chain
{0, limit, limit}, // Request the maximum allowed hash count
{0, limit + 1, limit}, // Request more than the maximum allowed hash count
{0, 1, 1}, // Make sure the genesis hash can be retrieved
}
// Run each of the tests and verify the results against the chain
for i, tt := range tests {
// Assemble the hash response we would like to receive
resp := make([]common.Hash, tt.result)
for j := 0; j < len(resp); j++ {
resp[j] = pm.blockchain.GetBlockByNumber(tt.origin + uint64(j)).Hash()
}
// Send the hash request and verify the response
p2p.Send(peer.app, 0x08, getBlockHashesFromNumberData{tt.origin, uint64(tt.number)})
if err := p2p.ExpectMsg(peer.app, 0x04, resp); err != nil {
t.Errorf("test %d: block hashes mismatch: %v", i, err)
}
}
}
func (p *peer) requestBlocks(hashes []common.Hash) error {
glog.V(logger.Debug).Infof("[%s] fetching %v blocks\n", p.id, len(hashes))
return p2p.Send(p.rw, GetBlocksMsg, hashes)
}
func testGetNodeData(t *testing.T, protocol int) {
// Define three accounts to simulate transactions with
acc1Key, _ := crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
acc2Key, _ := crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
acc1Addr := crypto.PubkeyToAddress(acc1Key.PublicKey)
acc2Addr := crypto.PubkeyToAddress(acc2Key.PublicKey)
// Create a chain generator with some simple transactions (blatantly stolen from @fjl/chain_makerts_test)
generator := func(i int, block *core.BlockGen) {
switch i {
case 0:
// In block 1, the test bank sends account #1 some ether.
tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(testBankKey)
block.AddTx(tx)
case 1:
// In block 2, the test bank sends some more ether to account #1.
// acc1Addr passes it on to account #2.
tx1, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(testBankKey)
tx2, _ := types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(acc1Key)
block.AddTx(tx1)
block.AddTx(tx2)
case 2:
// Block 3 is empty but was mined by account #2.
block.SetCoinbase(acc2Addr)
block.SetExtra([]byte("yeehaw"))
case 3:
// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
b2 := block.PrevBlock(1).Header()
b2.Extra = []byte("foo")
block.AddUncle(b2)
b3 := block.PrevBlock(2).Header()
b3.Extra = []byte("foo")
block.AddUncle(b3)
}
}
// Assemble the test environment
pm := newTestProtocolManagerMust(t, false, 4, generator, nil)
peer, _ := newTestPeer("peer", protocol, pm, true)
defer peer.close()
// Fetch for now the entire chain db
hashes := []common.Hash{}
for _, key := range pm.chaindb.(*ethdb.MemDatabase).Keys() {
if len(key) == len(common.Hash{}) {
hashes = append(hashes, common.BytesToHash(key))
}
}
p2p.Send(peer.app, 0x0d, hashes)
msg, err := peer.app.ReadMsg()
if err != nil {
t.Fatalf("failed to read node data response: %v", err)
}
if msg.Code != 0x0e {
t.Fatalf("response packet code mismatch: have %x, want %x", msg.Code, 0x0c)
}
var data [][]byte
if err := msg.Decode(&data); err != nil {
t.Fatalf("failed to decode response node data: %v", err)
}
// Verify that all hashes correspond to the requested data, and reconstruct a state tree
for i, want := range hashes {
if hash := crypto.Sha3Hash(data[i]); hash != want {
fmt.Errorf("data hash mismatch: have %x, want %x", hash, want)
}
}
statedb, _ := ethdb.NewMemDatabase()
for i := 0; i < len(data); i++ {
statedb.Put(hashes[i].Bytes(), data[i])
}
accounts := []common.Address{testBankAddress, acc1Addr, acc2Addr}
for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
trie, _ := state.New(pm.blockchain.GetBlockByNumber(i).Root(), statedb)
for j, acc := range accounts {
state, _ := pm.blockchain.State()
bw := state.GetBalance(acc)
bh := trie.GetBalance(acc)
if (bw != nil && bh == nil) || (bw == nil && bh != nil) {
t.Errorf("test %d, account %d: balance mismatch: have %v, want %v", i, j, bh, bw)
}
if bw != nil && bh != nil && bw.Cmp(bw) != 0 {
t.Errorf("test %d, account %d: balance mismatch: have %v, want %v", i, j, bh, bw)
}
}
}
}
// RequestBodies fetches a batch of blocks' bodies corresponding to the hashes
// specified.
func (p *peer) RequestBodies(hashes []common.Hash) error {
glog.V(logger.Debug).Infof("%v fetching %d block bodies", p, len(hashes))
return p2p.Send(p.rw, GetBlockBodiesMsg, hashes)
}
func testGetBlockHeaders(t *testing.T, protocol int) {
pm := newTestProtocolManagerMust(t, false, downloader.MaxHashFetch+15, nil, nil)
peer, _ := newTestPeer("peer", protocol, pm, true)
defer peer.close()
// Create a "random" unknown hash for testing
var unknown common.Hash
for i, _ := range unknown {
unknown[i] = byte(i)
}
// Create a batch of tests for various scenarios
limit := uint64(downloader.MaxHeaderFetch)
tests := []struct {
query *getBlockHeadersData // The query to execute for header retrieval
expect []common.Hash // The hashes of the block whose headers are expected
}{
// A single random block should be retrievable by hash and number too
{
&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.blockchain.GetBlockByNumber(limit / 2).Hash()}, Amount: 1},
[]common.Hash{pm.blockchain.GetBlockByNumber(limit / 2).Hash()},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 1},
[]common.Hash{pm.blockchain.GetBlockByNumber(limit / 2).Hash()},
},
// Multiple headers should be retrievable in both directions
{
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3},
[]common.Hash{
pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
pm.blockchain.GetBlockByNumber(limit/2 + 1).Hash(),
pm.blockchain.GetBlockByNumber(limit/2 + 2).Hash(),
},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3, Reverse: true},
[]common.Hash{
pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
pm.blockchain.GetBlockByNumber(limit/2 - 1).Hash(),
pm.blockchain.GetBlockByNumber(limit/2 - 2).Hash(),
},
},
// Multiple headers with skip lists should be retrievable
{
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3},
[]common.Hash{
pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
pm.blockchain.GetBlockByNumber(limit/2 + 4).Hash(),
pm.blockchain.GetBlockByNumber(limit/2 + 8).Hash(),
},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3, Reverse: true},
[]common.Hash{
pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
pm.blockchain.GetBlockByNumber(limit/2 - 4).Hash(),
pm.blockchain.GetBlockByNumber(limit/2 - 8).Hash(),
},
},
// The chain endpoints should be retrievable
{
&getBlockHeadersData{Origin: hashOrNumber{Number: 0}, Amount: 1},
[]common.Hash{pm.blockchain.GetBlockByNumber(0).Hash()},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64()}, Amount: 1},
[]common.Hash{pm.blockchain.CurrentBlock().Hash()},
},
// Ensure protocol limits are honored
{
&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
pm.blockchain.GetBlockHashesFromHash(pm.blockchain.CurrentBlock().Hash(), limit),
},
// Check that requesting more than available is handled gracefully
{
&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 4}, Skip: 3, Amount: 3},
[]common.Hash{
pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 4).Hash(),
pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64()).Hash(),
},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 3, Amount: 3, Reverse: true},
[]common.Hash{
pm.blockchain.GetBlockByNumber(4).Hash(),
pm.blockchain.GetBlockByNumber(0).Hash(),
},
},
// Check that requesting more than available is handled gracefully, even if mid skip
{
&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 4}, Skip: 2, Amount: 3},
[]common.Hash{
pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 4).Hash(),
pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 1).Hash(),
},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 2, Amount: 3, Reverse: true},
[]common.Hash{
pm.blockchain.GetBlockByNumber(4).Hash(),
pm.blockchain.GetBlockByNumber(1).Hash(),
},
},
// Check that non existing headers aren't returned
{
&getBlockHeadersData{Origin: hashOrNumber{Hash: unknown}, Amount: 1},
[]common.Hash{},
}, {
&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() + 1}, Amount: 1},
[]common.Hash{},
},
}
// Run each of the tests and verify the results against the chain
for i, tt := range tests {
// Collect the headers to expect in the response
headers := []*types.Header{}
for _, hash := range tt.expect {
headers = append(headers, pm.blockchain.GetBlock(hash).Header())
}
// Send the hash request and verify the response
p2p.Send(peer.app, 0x03, tt.query)
if err := p2p.ExpectMsg(peer.app, 0x04, headers); err != nil {
t.Errorf("test %d: headers mismatch: %v", i, err)
}
}
}
func testGetBlockBodies(t *testing.T, protocol int) {
pm := newTestProtocolManagerMust(t, false, downloader.MaxBlockFetch+15, nil, nil)
peer, _ := newTestPeer("peer", protocol, pm, true)
defer peer.close()
// Create a batch of tests for various scenarios
limit := downloader.MaxBlockFetch
tests := []struct {
random int // Number of blocks to fetch randomly from the chain
explicit []common.Hash // Explicitly requested blocks
available []bool // Availability of explicitly requested blocks
expected int // Total number of existing blocks to expect
}{
{1, nil, nil, 1}, // A single random block should be retrievable
{10, nil, nil, 10}, // Multiple random blocks should be retrievable
{limit, nil, nil, limit}, // The maximum possible blocks should be retrievable
{limit + 1, nil, nil, limit}, // No more than the possible block count should be returned
{0, []common.Hash{pm.blockchain.Genesis().Hash()}, []bool{true}, 1}, // The genesis block should be retrievable
{0, []common.Hash{pm.blockchain.CurrentBlock().Hash()}, []bool{true}, 1}, // The chains head block should be retrievable
{0, []common.Hash{common.Hash{}}, []bool{false}, 0}, // A non existent block should not be returned
// Existing and non-existing blocks interleaved should not cause problems
{0, []common.Hash{
common.Hash{},
pm.blockchain.GetBlockByNumber(1).Hash(),
common.Hash{},
pm.blockchain.GetBlockByNumber(10).Hash(),
common.Hash{},
pm.blockchain.GetBlockByNumber(100).Hash(),
common.Hash{},
}, []bool{false, true, false, true, false, true, false}, 3},
}
// Run each of the tests and verify the results against the chain
for i, tt := range tests {
// Collect the hashes to request, and the response to expect
hashes, seen := []common.Hash{}, make(map[int64]bool)
bodies := []*blockBody{}
for j := 0; j < tt.random; j++ {
for {
num := rand.Int63n(int64(pm.blockchain.CurrentBlock().NumberU64()))
if !seen[num] {
seen[num] = true
block := pm.blockchain.GetBlockByNumber(uint64(num))
hashes = append(hashes, block.Hash())
if len(bodies) < tt.expected {
bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
}
break
}
}
}
for j, hash := range tt.explicit {
hashes = append(hashes, hash)
if tt.available[j] && len(bodies) < tt.expected {
block := pm.blockchain.GetBlock(hash)
bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
}
}
// Send the hash request and verify the response
p2p.Send(peer.app, 0x05, hashes)
if err := p2p.ExpectMsg(peer.app, 0x06, bodies); err != nil {
t.Errorf("test %d: bodies mismatch: %v", i, err)
}
}
}
// RequestReceipts fetches a batch of transaction receipts from a remote node.
func (p *peer) RequestReceipts(hashes []common.Hash) error {
glog.V(logger.Debug).Infof("%v fetching %v receipts", p, len(hashes))
return p2p.Send(p.rw, GetReceiptsMsg, hashes)
}
// RequestNodeData fetches a batch of arbitrary data from a node's known state
// data, corresponding to the specified hashes.
func (p *peer) RequestNodeData(hashes []common.Hash) error {
glog.V(logger.Debug).Infof("%v fetching %v state data", p, len(hashes))
return p2p.Send(p.rw, GetNodeDataMsg, hashes)
}
func (p *peer) requestHashes(from common.Hash) error {
glog.V(logger.Debug).Infof("[%s] fetching hashes (%d) %x...\n", p.id, maxHashes, from[:4])
return p2p.Send(p.rw, GetBlockHashesMsg, getBlockHashesMsgData{from, maxHashes})
}
func (p *peer) sendTransaction(tx *types.Transaction) error {
p.txHashes.Add(tx.Hash())
return p2p.Send(p.rw, TxMsg, []*types.Transaction{tx})
}
func (p *peer) sendNewBlock(block *types.Block) error {
p.blockHashes.Add(block.Hash())
return p2p.Send(p.rw, NewBlockMsg, []interface{}{block, block.Td})
}
func (p *peer) sendBlocks(blocks []*types.Block) error {
return p2p.Send(p.rw, BlocksMsg, blocks)
}
func (p *peer) sendBlockHashes(hashes []common.Hash) error {
return p2p.Send(p.rw, BlockHashesMsg, hashes)
}