package routing import ( "fmt" "sync" "github.com/go-errors/errors" "github.com/lightningnetwork/lnd/channeldb" "github.com/lightningnetwork/lnd/htlcswitch" "github.com/lightningnetwork/lnd/lntypes" "github.com/lightningnetwork/lnd/lnwire" "github.com/lightningnetwork/lnd/routing/route" "github.com/lightningnetwork/lnd/zpay32" ) type mockPaymentAttemptDispatcher struct { onPayment func(firstHop lnwire.ShortChannelID) ([32]byte, error) results map[uint64]*htlcswitch.PaymentResult } var _ PaymentAttemptDispatcher = (*mockPaymentAttemptDispatcher)(nil) func (m *mockPaymentAttemptDispatcher) SendHTLC(firstHop lnwire.ShortChannelID, pid uint64, _ *lnwire.UpdateAddHTLC) error { if m.onPayment == nil { return nil } if m.results == nil { m.results = make(map[uint64]*htlcswitch.PaymentResult) } var result *htlcswitch.PaymentResult preimage, err := m.onPayment(firstHop) if err != nil { fwdErr, ok := err.(*htlcswitch.ForwardingError) if !ok { return err } result = &htlcswitch.PaymentResult{ Error: fwdErr, } } else { result = &htlcswitch.PaymentResult{Preimage: preimage} } m.results[pid] = result return nil } func (m *mockPaymentAttemptDispatcher) GetPaymentResult(paymentID uint64, _ htlcswitch.ErrorDecrypter) (<-chan *htlcswitch.PaymentResult, error) { c := make(chan *htlcswitch.PaymentResult, 1) res, ok := m.results[paymentID] if !ok { return nil, htlcswitch.ErrPaymentIDNotFound } c <- res return c, nil } func (m *mockPaymentAttemptDispatcher) setPaymentResult( f func(firstHop lnwire.ShortChannelID) ([32]byte, error)) { m.onPayment = f } type mockPaymentSessionSource struct { routes []*route.Route } var _ PaymentSessionSource = (*mockPaymentSessionSource)(nil) func (m *mockPaymentSessionSource) NewPaymentSession(routeHints [][]zpay32.HopHint, target route.Vertex) (PaymentSession, error) { return &mockPaymentSession{m.routes}, nil } func (m *mockPaymentSessionSource) NewPaymentSessionForRoute( preBuiltRoute *route.Route) PaymentSession { return nil } func (m *mockPaymentSessionSource) NewPaymentSessionEmpty() PaymentSession { return &mockPaymentSession{} } type mockPaymentSession struct { routes []*route.Route } var _ PaymentSession = (*mockPaymentSession)(nil) func (m *mockPaymentSession) RequestRoute(payment *LightningPayment, height uint32, finalCltvDelta uint16) (*route.Route, error) { if len(m.routes) == 0 { return nil, fmt.Errorf("no routes") } r := m.routes[0] m.routes = m.routes[1:] return r, nil } func (m *mockPaymentSession) ReportVertexFailure(v route.Vertex) {} func (m *mockPaymentSession) ReportEdgeFailure(failedEdge edge, minPenalizeAmt lnwire.MilliSatoshi) {} func (m *mockPaymentSession) ReportEdgePolicyFailure(failedEdge edge) {} type mockPayer struct { sendResult chan error paymentResultErr chan error paymentResult chan *htlcswitch.PaymentResult quit chan struct{} } var _ PaymentAttemptDispatcher = (*mockPayer)(nil) func (m *mockPayer) SendHTLC(_ lnwire.ShortChannelID, paymentID uint64, _ *lnwire.UpdateAddHTLC) error { select { case res := <-m.sendResult: return res case <-m.quit: return fmt.Errorf("test quitting") } } func (m *mockPayer) GetPaymentResult(paymentID uint64, _ htlcswitch.ErrorDecrypter) ( <-chan *htlcswitch.PaymentResult, error) { select { case res := <-m.paymentResult: resChan := make(chan *htlcswitch.PaymentResult, 1) resChan <- res return resChan, nil case err := <-m.paymentResultErr: return nil, err case <-m.quit: return nil, fmt.Errorf("test quitting") } } type initArgs struct { c *channeldb.PaymentCreationInfo } type registerArgs struct { a *channeldb.PaymentAttemptInfo } type successArgs struct { preimg lntypes.Preimage } type failArgs struct { reason channeldb.FailureReason } type mockControlTower struct { inflights map[lntypes.Hash]channeldb.InFlightPayment successful map[lntypes.Hash]struct{} init chan initArgs register chan registerArgs success chan successArgs fail chan failArgs fetchInFlight chan struct{} sync.Mutex } var _ ControlTower = (*mockControlTower)(nil) func makeMockControlTower() *mockControlTower { return &mockControlTower{ inflights: make(map[lntypes.Hash]channeldb.InFlightPayment), successful: make(map[lntypes.Hash]struct{}), } } func (m *mockControlTower) InitPayment(phash lntypes.Hash, c *channeldb.PaymentCreationInfo) error { m.Lock() defer m.Unlock() if m.init != nil { m.init <- initArgs{c} } if _, ok := m.successful[phash]; ok { return fmt.Errorf("already successful") } _, ok := m.inflights[phash] if ok { return fmt.Errorf("in flight") } m.inflights[phash] = channeldb.InFlightPayment{ Info: c, } return nil } func (m *mockControlTower) RegisterAttempt(phash lntypes.Hash, a *channeldb.PaymentAttemptInfo) error { m.Lock() defer m.Unlock() if m.register != nil { m.register <- registerArgs{a} } p, ok := m.inflights[phash] if !ok { return fmt.Errorf("not in flight") } p.Attempt = a m.inflights[phash] = p return nil } func (m *mockControlTower) Success(phash lntypes.Hash, preimg lntypes.Preimage) error { m.Lock() defer m.Unlock() if m.success != nil { m.success <- successArgs{preimg} } delete(m.inflights, phash) m.successful[phash] = struct{}{} return nil } func (m *mockControlTower) Fail(phash lntypes.Hash, reason channeldb.FailureReason) error { m.Lock() defer m.Unlock() if m.fail != nil { m.fail <- failArgs{reason} } delete(m.inflights, phash) return nil } func (m *mockControlTower) FetchInFlightPayments() ( []*channeldb.InFlightPayment, error) { m.Lock() defer m.Unlock() if m.fetchInFlight != nil { m.fetchInFlight <- struct{}{} } var fl []*channeldb.InFlightPayment for _, ifl := range m.inflights { fl = append(fl, &ifl) } return fl, nil } func (m *mockControlTower) SubscribePayment(paymentHash lntypes.Hash) ( bool, chan PaymentResult, error) { return false, nil, errors.New("not implemented") }