1eb906bcfb
Add message interceptor which checks the order and may skip the messages which were denoted to be skipeed.
527 lines
12 KiB
Go
527 lines
12 KiB
Go
package htlcswitch
|
|
|
|
import (
|
|
"crypto/sha256"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"sync"
|
|
|
|
"io"
|
|
"sync/atomic"
|
|
|
|
"bytes"
|
|
|
|
"testing"
|
|
|
|
"github.com/btcsuite/fastsha256"
|
|
"github.com/go-errors/errors"
|
|
"github.com/lightningnetwork/lnd/chainntnfs"
|
|
"github.com/lightningnetwork/lnd/channeldb"
|
|
"github.com/lightningnetwork/lnd/lnwallet"
|
|
"github.com/lightningnetwork/lnd/lnwire"
|
|
"github.com/roasbeef/btcd/btcec"
|
|
"github.com/roasbeef/btcd/chaincfg/chainhash"
|
|
"github.com/roasbeef/btcd/txscript"
|
|
"github.com/roasbeef/btcd/wire"
|
|
)
|
|
|
|
type mockServer struct {
|
|
sync.Mutex
|
|
|
|
started int32
|
|
shutdown int32
|
|
wg sync.WaitGroup
|
|
quit chan bool
|
|
|
|
t *testing.T
|
|
name string
|
|
messages chan lnwire.Message
|
|
|
|
id [33]byte
|
|
htlcSwitch *Switch
|
|
|
|
registry *mockInvoiceRegistry
|
|
interceptorFuncs []messageInterceptor
|
|
}
|
|
|
|
var _ Peer = (*mockServer)(nil)
|
|
|
|
func newMockServer(t *testing.T, name string) *mockServer {
|
|
var id [33]byte
|
|
h := sha256.Sum256([]byte(name))
|
|
copy(id[:], h[:])
|
|
|
|
return &mockServer{
|
|
t: t,
|
|
id: id,
|
|
name: name,
|
|
messages: make(chan lnwire.Message, 3000),
|
|
quit: make(chan bool),
|
|
registry: newMockRegistry(),
|
|
htlcSwitch: New(Config{}),
|
|
interceptorFuncs: make([]messageInterceptor, 0),
|
|
}
|
|
}
|
|
|
|
func (s *mockServer) Start() error {
|
|
if !atomic.CompareAndSwapInt32(&s.started, 0, 1) {
|
|
return nil
|
|
}
|
|
|
|
s.htlcSwitch.Start()
|
|
|
|
s.wg.Add(1)
|
|
go func() {
|
|
defer s.wg.Done()
|
|
|
|
for {
|
|
select {
|
|
case msg := <-s.messages:
|
|
var shouldSkip bool
|
|
|
|
for _, interceptor := range s.interceptorFuncs {
|
|
skip, err := interceptor(msg)
|
|
if err != nil {
|
|
s.errChan <- errors.Errorf("%v: error in the "+
|
|
"interceptor: %v", s.name, err)
|
|
return
|
|
}
|
|
shouldSkip = shouldSkip || skip
|
|
}
|
|
|
|
if shouldSkip {
|
|
continue
|
|
}
|
|
|
|
if err := s.readHandler(msg); err != nil {
|
|
s.Lock()
|
|
defer s.Unlock()
|
|
s.t.Fatalf("%v server error: %v", s.name, err)
|
|
}
|
|
case <-s.quit:
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
|
|
return nil
|
|
}
|
|
|
|
// mockHopIterator represents the test version of hop iterator which instead
|
|
// of encrypting the path in onion blob just stores the path as a list of hops.
|
|
type mockHopIterator struct {
|
|
hops []ForwardingInfo
|
|
}
|
|
|
|
func newMockHopIterator(hops ...ForwardingInfo) HopIterator {
|
|
return &mockHopIterator{hops: hops}
|
|
}
|
|
|
|
func (r *mockHopIterator) ForwardingInstructions() ForwardingInfo {
|
|
h := r.hops[0]
|
|
r.hops = r.hops[1:]
|
|
return h
|
|
}
|
|
|
|
func (r *mockHopIterator) EncodeNextHop(w io.Writer) error {
|
|
var hopLength [4]byte
|
|
binary.BigEndian.PutUint32(hopLength[:], uint32(len(r.hops)))
|
|
|
|
if _, err := w.Write(hopLength[:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, hop := range r.hops {
|
|
if err := hop.encode(w); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (f *ForwardingInfo) encode(w io.Writer) error {
|
|
if _, err := w.Write([]byte{byte(f.Network)}); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := binary.Write(w, binary.BigEndian, f.NextHop); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := binary.Write(w, binary.BigEndian, f.AmountToForward); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := binary.Write(w, binary.BigEndian, f.OutgoingCTLV); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
var _ HopIterator = (*mockHopIterator)(nil)
|
|
|
|
// mockObfuscator mock implementation of the failure obfuscator which only
|
|
// encodes the failure and do not makes any onion obfuscation.
|
|
type mockObfuscator struct{}
|
|
|
|
func newMockObfuscator() ErrorEncrypter {
|
|
return &mockObfuscator{}
|
|
}
|
|
|
|
func (o *mockObfuscator) EncryptFirstHop(failure lnwire.FailureMessage) (
|
|
lnwire.OpaqueReason, error) {
|
|
|
|
var b bytes.Buffer
|
|
if err := lnwire.EncodeFailure(&b, failure, 0); err != nil {
|
|
return nil, err
|
|
}
|
|
return b.Bytes(), nil
|
|
}
|
|
|
|
func (o *mockObfuscator) IntermediateEncrypt(reason lnwire.OpaqueReason) lnwire.OpaqueReason {
|
|
return reason
|
|
|
|
}
|
|
|
|
// mockDeobfuscator mock implementation of the failure deobfuscator which
|
|
// only decodes the failure do not makes any onion obfuscation.
|
|
type mockDeobfuscator struct{}
|
|
|
|
func newMockDeobfuscator() ErrorDecrypter {
|
|
return &mockDeobfuscator{}
|
|
}
|
|
|
|
func (o *mockDeobfuscator) DecryptError(reason lnwire.OpaqueReason) (*ForwardingError, error) {
|
|
|
|
r := bytes.NewReader(reason)
|
|
failure, err := lnwire.DecodeFailure(r, 0)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &ForwardingError{
|
|
FailureMessage: failure,
|
|
}, nil
|
|
}
|
|
|
|
var _ ErrorDecrypter = (*mockDeobfuscator)(nil)
|
|
|
|
// mockIteratorDecoder test version of hop iterator decoder which decodes the
|
|
// encoded array of hops.
|
|
type mockIteratorDecoder struct{}
|
|
|
|
func (p *mockIteratorDecoder) DecodeHopIterator(r io.Reader, meta []byte) (
|
|
HopIterator, lnwire.FailCode) {
|
|
|
|
var b [4]byte
|
|
_, err := r.Read(b[:])
|
|
if err != nil {
|
|
return nil, lnwire.CodeTemporaryChannelFailure
|
|
}
|
|
hopLength := binary.BigEndian.Uint32(b[:])
|
|
|
|
hops := make([]ForwardingInfo, hopLength)
|
|
for i := uint32(0); i < hopLength; i++ {
|
|
f := &ForwardingInfo{}
|
|
if err := f.decode(r); err != nil {
|
|
return nil, lnwire.CodeTemporaryChannelFailure
|
|
}
|
|
|
|
hops[i] = *f
|
|
}
|
|
|
|
return newMockHopIterator(hops...), lnwire.CodeNone
|
|
}
|
|
|
|
func (f *ForwardingInfo) decode(r io.Reader) error {
|
|
var net [1]byte
|
|
if _, err := r.Read(net[:]); err != nil {
|
|
return err
|
|
}
|
|
f.Network = NetworkHop(net[0])
|
|
|
|
if err := binary.Read(r, binary.BigEndian, &f.NextHop); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := binary.Read(r, binary.BigEndian, &f.AmountToForward); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := binary.Read(r, binary.BigEndian, &f.OutgoingCTLV); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// messageInterceptor is function that handles the incoming peer messages and
|
|
// may decide should the peer skip the message or not.
|
|
type messageInterceptor func(m lnwire.Message) (bool, error)
|
|
|
|
// Record is used to set the function which will be triggered when new
|
|
// lnwire message was received.
|
|
func (s *mockServer) intersect(f messageInterceptor) {
|
|
s.interceptorFuncs = append(s.interceptorFuncs, f)
|
|
}
|
|
|
|
func (s *mockServer) SendMessage(message lnwire.Message) error {
|
|
select {
|
|
case s.messages <- message:
|
|
case <-s.quit:
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *mockServer) readHandler(message lnwire.Message) error {
|
|
var targetChan lnwire.ChannelID
|
|
|
|
switch msg := message.(type) {
|
|
case *lnwire.UpdateAddHTLC:
|
|
targetChan = msg.ChanID
|
|
case *lnwire.UpdateFufillHTLC:
|
|
targetChan = msg.ChanID
|
|
case *lnwire.UpdateFailHTLC:
|
|
targetChan = msg.ChanID
|
|
case *lnwire.UpdateFailMalformedHTLC:
|
|
targetChan = msg.ChanID
|
|
case *lnwire.RevokeAndAck:
|
|
targetChan = msg.ChanID
|
|
case *lnwire.CommitSig:
|
|
targetChan = msg.ChanID
|
|
case *lnwire.FundingLocked:
|
|
// Ignore
|
|
return nil
|
|
default:
|
|
return errors.New("unknown message type")
|
|
}
|
|
|
|
// Dispatch the commitment update message to the proper
|
|
// channel link dedicated to this channel.
|
|
link, err := s.htlcSwitch.GetLink(targetChan)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Create goroutine for this, in order to be able to properly stop
|
|
// the server when handler stacked (server unavailable)
|
|
done := make(chan struct{})
|
|
go func() {
|
|
link.HandleChannelUpdate(message)
|
|
done <- struct{}{}
|
|
}()
|
|
select {
|
|
case <-done:
|
|
case <-s.quit:
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *mockServer) PubKey() [33]byte {
|
|
return s.id
|
|
}
|
|
|
|
func (s *mockServer) Disconnect(reason error) {
|
|
fmt.Printf("server %v disconnected due to %v\n", s.name, reason)
|
|
|
|
s.Stop()
|
|
s.t.Fatalf("server %v was disconnected", s.name)
|
|
}
|
|
|
|
func (s *mockServer) WipeChannel(*lnwallet.LightningChannel) error {
|
|
return nil
|
|
}
|
|
|
|
func (s *mockServer) Stop() {
|
|
if !atomic.CompareAndSwapInt32(&s.shutdown, 0, 1) {
|
|
return
|
|
}
|
|
|
|
s.htlcSwitch.Stop()
|
|
|
|
close(s.quit)
|
|
s.wg.Wait()
|
|
}
|
|
|
|
func (s *mockServer) String() string {
|
|
return s.name
|
|
}
|
|
|
|
type mockChannelLink struct {
|
|
shortChanID lnwire.ShortChannelID
|
|
|
|
chanID lnwire.ChannelID
|
|
|
|
peer Peer
|
|
|
|
packets chan *htlcPacket
|
|
}
|
|
|
|
func newMockChannelLink(chanID lnwire.ChannelID, shortChanID lnwire.ShortChannelID,
|
|
peer Peer) *mockChannelLink {
|
|
|
|
return &mockChannelLink{
|
|
chanID: chanID,
|
|
shortChanID: shortChanID,
|
|
packets: make(chan *htlcPacket, 1),
|
|
peer: peer,
|
|
}
|
|
}
|
|
|
|
func (f *mockChannelLink) HandleSwitchPacket(packet *htlcPacket) {
|
|
f.packets <- packet
|
|
}
|
|
|
|
func (f *mockChannelLink) HandleChannelUpdate(lnwire.Message) {
|
|
}
|
|
|
|
func (f *mockChannelLink) UpdateForwardingPolicy(_ ForwardingPolicy) {
|
|
}
|
|
|
|
func (f *mockChannelLink) Stats() (uint64, lnwire.MilliSatoshi, lnwire.MilliSatoshi) {
|
|
return 0, 0, 0
|
|
}
|
|
|
|
func (f *mockChannelLink) ChanID() lnwire.ChannelID { return f.chanID }
|
|
func (f *mockChannelLink) ShortChanID() lnwire.ShortChannelID { return f.shortChanID }
|
|
func (f *mockChannelLink) Bandwidth() lnwire.MilliSatoshi { return 99999999 }
|
|
func (f *mockChannelLink) Peer() Peer { return f.peer }
|
|
func (f *mockChannelLink) Start() error { return nil }
|
|
func (f *mockChannelLink) Stop() {}
|
|
|
|
var _ ChannelLink = (*mockChannelLink)(nil)
|
|
|
|
type mockInvoiceRegistry struct {
|
|
sync.Mutex
|
|
invoices map[chainhash.Hash]*channeldb.Invoice
|
|
}
|
|
|
|
func newMockRegistry() *mockInvoiceRegistry {
|
|
return &mockInvoiceRegistry{
|
|
invoices: make(map[chainhash.Hash]*channeldb.Invoice),
|
|
}
|
|
}
|
|
|
|
func (i *mockInvoiceRegistry) LookupInvoice(rHash chainhash.Hash) (*channeldb.Invoice, error) {
|
|
i.Lock()
|
|
defer i.Unlock()
|
|
|
|
invoice, ok := i.invoices[rHash]
|
|
if !ok {
|
|
return nil, errors.New("can't find mock invoice")
|
|
}
|
|
|
|
return invoice, nil
|
|
}
|
|
|
|
func (i *mockInvoiceRegistry) SettleInvoice(rhash chainhash.Hash) error {
|
|
|
|
invoice, err := i.LookupInvoice(rhash)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
i.Lock()
|
|
invoice.Terms.Settled = true
|
|
i.Unlock()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (i *mockInvoiceRegistry) AddInvoice(invoice *channeldb.Invoice) error {
|
|
i.Lock()
|
|
defer i.Unlock()
|
|
|
|
rhash := fastsha256.Sum256(invoice.Terms.PaymentPreimage[:])
|
|
i.invoices[chainhash.Hash(rhash)] = invoice
|
|
return nil
|
|
}
|
|
|
|
var _ InvoiceDatabase = (*mockInvoiceRegistry)(nil)
|
|
|
|
type mockSigner struct {
|
|
key *btcec.PrivateKey
|
|
}
|
|
|
|
func (m *mockSigner) SignOutputRaw(tx *wire.MsgTx, signDesc *lnwallet.SignDescriptor) ([]byte, error) {
|
|
amt := signDesc.Output.Value
|
|
witnessScript := signDesc.WitnessScript
|
|
privKey := m.key
|
|
|
|
if !privKey.PubKey().IsEqual(signDesc.PubKey) {
|
|
return nil, fmt.Errorf("incorrect key passed")
|
|
}
|
|
|
|
switch {
|
|
case signDesc.SingleTweak != nil:
|
|
privKey = lnwallet.TweakPrivKey(privKey,
|
|
signDesc.SingleTweak)
|
|
case signDesc.DoubleTweak != nil:
|
|
privKey = lnwallet.DeriveRevocationPrivKey(privKey,
|
|
signDesc.DoubleTweak)
|
|
}
|
|
|
|
sig, err := txscript.RawTxInWitnessSignature(tx, signDesc.SigHashes,
|
|
signDesc.InputIndex, amt, witnessScript, txscript.SigHashAll,
|
|
privKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return sig[:len(sig)-1], nil
|
|
}
|
|
func (m *mockSigner) ComputeInputScript(tx *wire.MsgTx, signDesc *lnwallet.SignDescriptor) (*lnwallet.InputScript, error) {
|
|
|
|
// TODO(roasbeef): expose tweaked signer from lnwallet so don't need to
|
|
// duplicate this code?
|
|
|
|
privKey := m.key
|
|
|
|
switch {
|
|
case signDesc.SingleTweak != nil:
|
|
privKey = lnwallet.TweakPrivKey(privKey,
|
|
signDesc.SingleTweak)
|
|
case signDesc.DoubleTweak != nil:
|
|
privKey = lnwallet.DeriveRevocationPrivKey(privKey,
|
|
signDesc.DoubleTweak)
|
|
}
|
|
|
|
witnessScript, err := txscript.WitnessSignature(tx, signDesc.SigHashes,
|
|
signDesc.InputIndex, signDesc.Output.Value, signDesc.Output.PkScript,
|
|
txscript.SigHashAll, privKey, true)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &lnwallet.InputScript{
|
|
Witness: witnessScript,
|
|
}, nil
|
|
}
|
|
|
|
type mockNotifier struct {
|
|
}
|
|
|
|
func (m *mockNotifier) RegisterConfirmationsNtfn(txid *chainhash.Hash, numConfs uint32) (*chainntnfs.ConfirmationEvent, error) {
|
|
return nil, nil
|
|
}
|
|
func (m *mockNotifier) RegisterBlockEpochNtfn() (*chainntnfs.BlockEpochEvent, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func (m *mockNotifier) Start() error {
|
|
return nil
|
|
}
|
|
|
|
func (m *mockNotifier) Stop() error {
|
|
return nil
|
|
}
|
|
func (m *mockNotifier) RegisterSpendNtfn(outpoint *wire.OutPoint) (*chainntnfs.SpendEvent, error) {
|
|
return &chainntnfs.SpendEvent{
|
|
Spend: make(chan *chainntnfs.SpendDetail),
|
|
}, nil
|
|
}
|