a32f2b79da
In this commit, we modify the InvoiceDatabase slightly to allow the link to record what the final payment about for an invoice was. It may be the case that the invoice actually had no specified value, or that the payer paid more than necessary. As a result, it's important that our on-disk records properly reflect this. To fix this issue, the SettleInvoice method now also accepts the final amount paid. Fixes #856.
810 lines
18 KiB
Go
810 lines
18 KiB
Go
package htlcswitch
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import (
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"bytes"
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"crypto/sha256"
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"encoding/binary"
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"fmt"
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"io"
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"io/ioutil"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"github.com/btcsuite/fastsha256"
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"github.com/go-errors/errors"
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"github.com/lightningnetwork/lightning-onion"
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"github.com/lightningnetwork/lnd/chainntnfs"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/contractcourt"
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"github.com/lightningnetwork/lnd/lnpeer"
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"github.com/lightningnetwork/lnd/lnwallet"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/roasbeef/btcd/btcec"
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"github.com/roasbeef/btcd/chaincfg/chainhash"
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"github.com/roasbeef/btcd/txscript"
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"github.com/roasbeef/btcd/wire"
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)
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type mockPreimageCache struct {
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sync.Mutex
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preimageMap map[[32]byte][]byte
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}
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func (m *mockPreimageCache) LookupPreimage(hash []byte) ([]byte, bool) {
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m.Lock()
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defer m.Unlock()
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var h [32]byte
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copy(h[:], hash)
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p, ok := m.preimageMap[h]
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return p, ok
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}
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func (m *mockPreimageCache) AddPreimage(preimage []byte) error {
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m.Lock()
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defer m.Unlock()
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m.preimageMap[sha256.Sum256(preimage[:])] = preimage
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return nil
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}
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func (m *mockPreimageCache) SubscribeUpdates() *contractcourt.WitnessSubscription {
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return nil
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}
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type mockFeeEstimator struct {
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byteFeeIn chan lnwallet.SatPerVByte
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quit chan struct{}
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}
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func (m *mockFeeEstimator) EstimateFeePerVSize(numBlocks uint32) (lnwallet.SatPerVByte, error) {
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select {
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case feeRate := <-m.byteFeeIn:
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return feeRate, nil
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case <-m.quit:
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return 0, fmt.Errorf("exiting")
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}
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}
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func (m *mockFeeEstimator) Start() error {
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return nil
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}
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func (m *mockFeeEstimator) Stop() error {
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close(m.quit)
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return nil
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}
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var _ lnwallet.FeeEstimator = (*mockFeeEstimator)(nil)
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type mockForwardingLog struct {
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sync.Mutex
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events map[time.Time]channeldb.ForwardingEvent
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}
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func (m *mockForwardingLog) AddForwardingEvents(events []channeldb.ForwardingEvent) error {
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m.Lock()
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defer m.Unlock()
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for _, event := range events {
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m.events[event.Timestamp] = event
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}
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return nil
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}
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type mockServer struct {
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started int32 // To be used atomically.
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shutdown int32 // To be used atomically.
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wg sync.WaitGroup
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quit chan struct{}
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t testing.TB
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name string
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messages chan lnwire.Message
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errChan chan error
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id [33]byte
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htlcSwitch *Switch
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registry *mockInvoiceRegistry
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interceptorFuncs []messageInterceptor
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}
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var _ lnpeer.Peer = (*mockServer)(nil)
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func initSwitchWithDB(startingHeight uint32, db *channeldb.DB) (*Switch, error) {
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if db == nil {
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tempPath, err := ioutil.TempDir("", "switchdb")
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if err != nil {
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return nil, err
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}
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db, err = channeldb.Open(tempPath)
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if err != nil {
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return nil, err
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}
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}
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cfg := Config{
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DB: db,
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SwitchPackager: channeldb.NewSwitchPackager(),
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FwdingLog: &mockForwardingLog{
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events: make(map[time.Time]channeldb.ForwardingEvent),
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},
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FetchLastChannelUpdate: func(lnwire.ShortChannelID) (*lnwire.ChannelUpdate, error) {
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return nil, nil
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},
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Notifier: &mockNotifier{},
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}
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return New(cfg, startingHeight)
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}
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func newMockServer(t testing.TB, name string, startingHeight uint32,
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db *channeldb.DB, defaultDelta uint32) (*mockServer, error) {
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var id [33]byte
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h := sha256.Sum256([]byte(name))
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copy(id[:], h[:])
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htlcSwitch, err := initSwitchWithDB(startingHeight, db)
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if err != nil {
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return nil, err
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}
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return &mockServer{
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t: t,
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id: id,
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name: name,
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messages: make(chan lnwire.Message, 3000),
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quit: make(chan struct{}),
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registry: newMockRegistry(defaultDelta),
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htlcSwitch: htlcSwitch,
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interceptorFuncs: make([]messageInterceptor, 0),
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}, nil
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}
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func (s *mockServer) Start() error {
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if !atomic.CompareAndSwapInt32(&s.started, 0, 1) {
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return errors.New("mock server already started")
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}
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if err := s.htlcSwitch.Start(); err != nil {
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return err
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}
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s.wg.Add(1)
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go func() {
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defer s.wg.Done()
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defer func() {
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s.htlcSwitch.Stop()
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}()
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for {
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select {
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case msg := <-s.messages:
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var shouldSkip bool
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for _, interceptor := range s.interceptorFuncs {
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skip, err := interceptor(msg)
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if err != nil {
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s.t.Fatalf("%v: error in the "+
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"interceptor: %v", s.name, err)
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return
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}
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shouldSkip = shouldSkip || skip
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}
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if shouldSkip {
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continue
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}
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if err := s.readHandler(msg); err != nil {
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s.t.Fatal(err)
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return
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}
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case <-s.quit:
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return
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}
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}
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}()
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return nil
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}
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// mockHopIterator represents the test version of hop iterator which instead
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// of encrypting the path in onion blob just stores the path as a list of hops.
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type mockHopIterator struct {
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hops []ForwardingInfo
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}
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func newMockHopIterator(hops ...ForwardingInfo) HopIterator {
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return &mockHopIterator{hops: hops}
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}
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func (r *mockHopIterator) ForwardingInstructions() ForwardingInfo {
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h := r.hops[0]
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r.hops = r.hops[1:]
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return h
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}
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func (r *mockHopIterator) ExtractErrorEncrypter(
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extracter ErrorEncrypterExtracter) (ErrorEncrypter, lnwire.FailCode) {
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return extracter(nil)
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}
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func (r *mockHopIterator) EncodeNextHop(w io.Writer) error {
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var hopLength [4]byte
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binary.BigEndian.PutUint32(hopLength[:], uint32(len(r.hops)))
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if _, err := w.Write(hopLength[:]); err != nil {
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return err
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}
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for _, hop := range r.hops {
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if err := hop.encode(w); err != nil {
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return err
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}
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}
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return nil
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}
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func (f *ForwardingInfo) encode(w io.Writer) error {
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if _, err := w.Write([]byte{byte(f.Network)}); err != nil {
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return err
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}
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if err := binary.Write(w, binary.BigEndian, f.NextHop); err != nil {
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return err
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}
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if err := binary.Write(w, binary.BigEndian, f.AmountToForward); err != nil {
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return err
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}
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if err := binary.Write(w, binary.BigEndian, f.OutgoingCTLV); err != nil {
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return err
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}
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return nil
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}
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var _ HopIterator = (*mockHopIterator)(nil)
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// mockObfuscator mock implementation of the failure obfuscator which only
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// encodes the failure and do not makes any onion obfuscation.
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type mockObfuscator struct {
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ogPacket *sphinx.OnionPacket
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}
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// NewMockObfuscator initializes a dummy mockObfuscator used for testing.
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func NewMockObfuscator() ErrorEncrypter {
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return &mockObfuscator{}
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}
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func (o *mockObfuscator) OnionPacket() *sphinx.OnionPacket {
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return o.ogPacket
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}
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func (o *mockObfuscator) Type() EncrypterType {
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return EncrypterTypeMock
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}
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func (o *mockObfuscator) Encode(w io.Writer) error {
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return nil
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}
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func (o *mockObfuscator) Decode(r io.Reader) error {
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return nil
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}
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func (o *mockObfuscator) Reextract(extracter ErrorEncrypterExtracter) error {
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return nil
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}
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func (o *mockObfuscator) EncryptFirstHop(failure lnwire.FailureMessage) (
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lnwire.OpaqueReason, error) {
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var b bytes.Buffer
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if err := lnwire.EncodeFailure(&b, failure, 0); err != nil {
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return nil, err
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}
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return b.Bytes(), nil
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}
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func (o *mockObfuscator) IntermediateEncrypt(reason lnwire.OpaqueReason) lnwire.OpaqueReason {
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return reason
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}
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// mockDeobfuscator mock implementation of the failure deobfuscator which
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// only decodes the failure do not makes any onion obfuscation.
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type mockDeobfuscator struct{}
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func newMockDeobfuscator() ErrorDecrypter {
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return &mockDeobfuscator{}
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}
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func (o *mockDeobfuscator) DecryptError(reason lnwire.OpaqueReason) (*ForwardingError, error) {
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r := bytes.NewReader(reason)
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failure, err := lnwire.DecodeFailure(r, 0)
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if err != nil {
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return nil, err
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}
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return &ForwardingError{
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FailureMessage: failure,
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}, nil
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}
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var _ ErrorDecrypter = (*mockDeobfuscator)(nil)
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// mockIteratorDecoder test version of hop iterator decoder which decodes the
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// encoded array of hops.
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type mockIteratorDecoder struct {
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mu sync.RWMutex
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responses map[[32]byte][]DecodeHopIteratorResponse
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}
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func newMockIteratorDecoder() *mockIteratorDecoder {
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return &mockIteratorDecoder{
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responses: make(map[[32]byte][]DecodeHopIteratorResponse),
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}
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}
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func (p *mockIteratorDecoder) DecodeHopIterator(r io.Reader, rHash []byte,
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cltv uint32) (HopIterator, lnwire.FailCode) {
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var b [4]byte
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_, err := r.Read(b[:])
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if err != nil {
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return nil, lnwire.CodeTemporaryChannelFailure
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}
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hopLength := binary.BigEndian.Uint32(b[:])
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hops := make([]ForwardingInfo, hopLength)
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for i := uint32(0); i < hopLength; i++ {
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f := &ForwardingInfo{}
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if err := f.decode(r); err != nil {
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return nil, lnwire.CodeTemporaryChannelFailure
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}
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hops[i] = *f
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}
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return newMockHopIterator(hops...), lnwire.CodeNone
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}
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func (p *mockIteratorDecoder) DecodeHopIterators(id []byte,
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reqs []DecodeHopIteratorRequest) ([]DecodeHopIteratorResponse, error) {
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idHash := sha256.Sum256(id)
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p.mu.RLock()
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if resps, ok := p.responses[idHash]; ok {
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p.mu.RUnlock()
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return resps, nil
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}
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p.mu.RUnlock()
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batchSize := len(reqs)
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resps := make([]DecodeHopIteratorResponse, 0, batchSize)
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for _, req := range reqs {
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iterator, failcode := p.DecodeHopIterator(
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req.OnionReader, req.RHash, req.IncomingCltv,
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)
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resp := DecodeHopIteratorResponse{
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HopIterator: iterator,
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FailCode: failcode,
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}
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resps = append(resps, resp)
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}
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p.mu.Lock()
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p.responses[idHash] = resps
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p.mu.Unlock()
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return resps, nil
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}
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func (f *ForwardingInfo) decode(r io.Reader) error {
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var net [1]byte
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if _, err := r.Read(net[:]); err != nil {
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return err
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}
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f.Network = NetworkHop(net[0])
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if err := binary.Read(r, binary.BigEndian, &f.NextHop); err != nil {
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return err
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}
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if err := binary.Read(r, binary.BigEndian, &f.AmountToForward); err != nil {
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return err
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}
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if err := binary.Read(r, binary.BigEndian, &f.OutgoingCTLV); err != nil {
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return err
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}
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return nil
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}
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// messageInterceptor is function that handles the incoming peer messages and
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// may decide should the peer skip the message or not.
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type messageInterceptor func(m lnwire.Message) (bool, error)
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// Record is used to set the function which will be triggered when new
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// lnwire message was received.
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func (s *mockServer) intersect(f messageInterceptor) {
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s.interceptorFuncs = append(s.interceptorFuncs, f)
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}
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func (s *mockServer) SendMessage(sync bool, msgs ...lnwire.Message) error {
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for _, msg := range msgs {
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select {
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case s.messages <- msg:
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case <-s.quit:
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return errors.New("server is stopped")
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}
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}
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return nil
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}
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func (s *mockServer) readHandler(message lnwire.Message) error {
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var targetChan lnwire.ChannelID
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switch msg := message.(type) {
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case *lnwire.UpdateAddHTLC:
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targetChan = msg.ChanID
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case *lnwire.UpdateFulfillHTLC:
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targetChan = msg.ChanID
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case *lnwire.UpdateFailHTLC:
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targetChan = msg.ChanID
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case *lnwire.UpdateFailMalformedHTLC:
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targetChan = msg.ChanID
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case *lnwire.RevokeAndAck:
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targetChan = msg.ChanID
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case *lnwire.CommitSig:
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targetChan = msg.ChanID
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case *lnwire.FundingLocked:
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// Ignore
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return nil
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case *lnwire.ChannelReestablish:
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targetChan = msg.ChanID
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case *lnwire.UpdateFee:
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targetChan = msg.ChanID
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default:
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return fmt.Errorf("unknown message type: %T", msg)
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}
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// Dispatch the commitment update message to the proper
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// channel link dedicated to this channel.
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link, err := s.htlcSwitch.GetLink(targetChan)
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if err != nil {
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return err
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}
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// Create goroutine for this, in order to be able to properly stop
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// the server when handler stacked (server unavailable)
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link.HandleChannelUpdate(message)
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return nil
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}
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func (s *mockServer) PubKey() [33]byte {
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return s.id
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}
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func (s *mockServer) IdentityKey() *btcec.PublicKey {
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pubkey, _ := btcec.ParsePubKey(s.id[:], btcec.S256())
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return pubkey
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}
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func (s *mockServer) WipeChannel(*wire.OutPoint) error {
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return nil
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}
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func (s *mockServer) Stop() error {
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if !atomic.CompareAndSwapInt32(&s.shutdown, 0, 1) {
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return nil
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}
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close(s.quit)
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s.wg.Wait()
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return nil
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}
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func (s *mockServer) String() string {
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return s.name
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}
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type mockChannelLink struct {
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htlcSwitch *Switch
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shortChanID lnwire.ShortChannelID
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chanID lnwire.ChannelID
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peer lnpeer.Peer
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startMailBox bool
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mailBox MailBox
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packets chan *htlcPacket
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eligible bool
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htlcID uint64
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}
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// completeCircuit is a helper method for adding the finalized payment circuit
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// to the switch's circuit map. In testing, this should be executed after
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// receiving an htlc from the downstream packets channel.
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func (f *mockChannelLink) completeCircuit(pkt *htlcPacket) error {
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switch htlc := pkt.htlc.(type) {
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case *lnwire.UpdateAddHTLC:
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pkt.outgoingChanID = f.shortChanID
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pkt.outgoingHTLCID = f.htlcID
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htlc.ID = f.htlcID
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keystone := Keystone{pkt.inKey(), pkt.outKey()}
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if err := f.htlcSwitch.openCircuits(keystone); err != nil {
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return err
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}
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f.htlcID++
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case *lnwire.UpdateFulfillHTLC, *lnwire.UpdateFailHTLC:
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err := f.htlcSwitch.teardownCircuit(pkt)
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if err != nil {
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return err
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}
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}
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|
|
f.mailBox.AckPacket(pkt.inKey())
|
|
|
|
return nil
|
|
}
|
|
|
|
func (f *mockChannelLink) deleteCircuit(pkt *htlcPacket) error {
|
|
return f.htlcSwitch.deleteCircuits(pkt.inKey())
|
|
}
|
|
|
|
func newMockChannelLink(htlcSwitch *Switch, chanID lnwire.ChannelID,
|
|
shortChanID lnwire.ShortChannelID, peer lnpeer.Peer, eligible bool,
|
|
) *mockChannelLink {
|
|
|
|
return &mockChannelLink{
|
|
htlcSwitch: htlcSwitch,
|
|
chanID: chanID,
|
|
shortChanID: shortChanID,
|
|
peer: peer,
|
|
eligible: eligible,
|
|
}
|
|
}
|
|
|
|
func (f *mockChannelLink) HandleSwitchPacket(pkt *htlcPacket) error {
|
|
f.mailBox.AddPacket(pkt)
|
|
return nil
|
|
}
|
|
|
|
func (f *mockChannelLink) HandleChannelUpdate(lnwire.Message) {
|
|
}
|
|
|
|
func (f *mockChannelLink) UpdateForwardingPolicy(_ ForwardingPolicy) {
|
|
}
|
|
func (f *mockChannelLink) HtlcSatifiesPolicy([32]byte, lnwire.MilliSatoshi,
|
|
lnwire.MilliSatoshi, uint32, uint32, uint32) lnwire.FailureMessage {
|
|
return nil
|
|
}
|
|
|
|
func (f *mockChannelLink) Stats() (uint64, lnwire.MilliSatoshi, lnwire.MilliSatoshi) {
|
|
return 0, 0, 0
|
|
}
|
|
|
|
func (f *mockChannelLink) AttachMailBox(mailBox MailBox) {
|
|
f.mailBox = mailBox
|
|
f.packets = mailBox.PacketOutBox()
|
|
}
|
|
|
|
func (f *mockChannelLink) Start() error {
|
|
f.mailBox.ResetMessages()
|
|
f.mailBox.ResetPackets()
|
|
return nil
|
|
}
|
|
|
|
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() lnpeer.Peer { return f.peer }
|
|
func (f *mockChannelLink) Stop() {}
|
|
func (f *mockChannelLink) EligibleToForward() bool { return f.eligible }
|
|
func (f *mockChannelLink) setLiveShortChanID(sid lnwire.ShortChannelID) { f.shortChanID = sid }
|
|
func (f *mockChannelLink) UpdateShortChanID() (lnwire.ShortChannelID, error) {
|
|
f.eligible = true
|
|
return f.shortChanID, nil
|
|
}
|
|
|
|
var _ ChannelLink = (*mockChannelLink)(nil)
|
|
|
|
type mockInvoiceRegistry struct {
|
|
sync.Mutex
|
|
|
|
invoices map[chainhash.Hash]channeldb.Invoice
|
|
finalDelta uint32
|
|
}
|
|
|
|
func newMockRegistry(minDelta uint32) *mockInvoiceRegistry {
|
|
return &mockInvoiceRegistry{
|
|
finalDelta: minDelta,
|
|
invoices: make(map[chainhash.Hash]channeldb.Invoice),
|
|
}
|
|
}
|
|
|
|
func (i *mockInvoiceRegistry) LookupInvoice(rHash chainhash.Hash) (channeldb.Invoice, uint32, error) {
|
|
i.Lock()
|
|
defer i.Unlock()
|
|
|
|
invoice, ok := i.invoices[rHash]
|
|
if !ok {
|
|
return channeldb.Invoice{}, 0, fmt.Errorf("can't find mock "+
|
|
"invoice: %x", rHash[:])
|
|
}
|
|
|
|
return invoice, i.finalDelta, nil
|
|
}
|
|
|
|
func (i *mockInvoiceRegistry) SettleInvoice(rhash chainhash.Hash,
|
|
amt lnwire.MilliSatoshi) error {
|
|
|
|
i.Lock()
|
|
defer i.Unlock()
|
|
|
|
invoice, ok := i.invoices[rhash]
|
|
if !ok {
|
|
return fmt.Errorf("can't find mock invoice: %x", rhash[:])
|
|
}
|
|
|
|
if invoice.Terms.Settled {
|
|
return nil
|
|
}
|
|
|
|
invoice.Terms.Settled = true
|
|
invoice.AmtPaid = amt
|
|
i.invoices[rhash] = invoice
|
|
|
|
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.KeyDesc.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, signDesc.HashType,
|
|
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,
|
|
signDesc.HashType, privKey, true)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &lnwallet.InputScript{
|
|
Witness: witnessScript,
|
|
}, nil
|
|
}
|
|
|
|
type mockNotifier struct {
|
|
epochChan chan *chainntnfs.BlockEpoch
|
|
}
|
|
|
|
func (m *mockNotifier) RegisterConfirmationsNtfn(txid *chainhash.Hash,
|
|
numConfs uint32, heightHint uint32) (*chainntnfs.ConfirmationEvent, error) {
|
|
return nil, nil
|
|
}
|
|
func (m *mockNotifier) RegisterBlockEpochNtfn() (*chainntnfs.BlockEpochEvent, error) {
|
|
return &chainntnfs.BlockEpochEvent{
|
|
Epochs: m.epochChan,
|
|
Cancel: func() {},
|
|
}, nil
|
|
}
|
|
|
|
func (m *mockNotifier) Start() error {
|
|
return nil
|
|
}
|
|
|
|
func (m *mockNotifier) Stop() error {
|
|
return nil
|
|
}
|
|
|
|
func (m *mockNotifier) RegisterSpendNtfn(outpoint *wire.OutPoint,
|
|
heightHint uint32, mempool bool) (*chainntnfs.SpendEvent, error) {
|
|
|
|
return &chainntnfs.SpendEvent{
|
|
Spend: make(chan *chainntnfs.SpendDetail),
|
|
}, nil
|
|
}
|
|
|
|
type mockTicker struct {
|
|
ticker <-chan time.Time
|
|
}
|
|
|
|
func (m *mockTicker) Start() <-chan time.Time {
|
|
return m.ticker
|
|
}
|
|
|
|
func (m *mockTicker) Stop() {
|
|
}
|