package routerrpc import ( "bytes" "context" "encoding/hex" "testing" "github.com/btcsuite/btcutil" "github.com/lightningnetwork/lnd/channeldb" "github.com/lightningnetwork/lnd/lnwire" "github.com/lightningnetwork/lnd/record" "github.com/lightningnetwork/lnd/routing" "github.com/lightningnetwork/lnd/routing/route" "github.com/lightningnetwork/lnd/lnrpc" ) const ( destKey = "0286098b97bc843372b4426d4b276cea9aa2f48f0428d6f5b66ae101befc14f8b4" ignoreNodeKey = "02f274f48f3c0d590449a6776e3ce8825076ac376e470e992246eebc565ef8bb2a" hintNodeKey = "0274e7fb33eafd74fe1acb6db7680bb4aa78e9c839a6e954e38abfad680f645ef7" testMissionControlProb = 0.5 ) var ( sourceKey = route.Vertex{1, 2, 3} node1 = route.Vertex{10} node2 = route.Vertex{11} ) // TestQueryRoutes asserts that query routes rpc parameters are properly parsed // and passed onto path finding. func TestQueryRoutes(t *testing.T) { t.Run("no mission control", func(t *testing.T) { testQueryRoutes(t, false, false) }) t.Run("no mission control and msat", func(t *testing.T) { testQueryRoutes(t, false, true) }) t.Run("with mission control", func(t *testing.T) { testQueryRoutes(t, true, false) }) } func testQueryRoutes(t *testing.T, useMissionControl bool, useMsat bool) { ignoreNodeBytes, err := hex.DecodeString(ignoreNodeKey) if err != nil { t.Fatal(err) } var ignoreNodeVertex route.Vertex copy(ignoreNodeVertex[:], ignoreNodeBytes) destNodeBytes, err := hex.DecodeString(destKey) if err != nil { t.Fatal(err) } var ( lastHop = route.Vertex{64} outgoingChan = uint64(383322) ) hintNode, err := route.NewVertexFromStr(hintNodeKey) if err != nil { t.Fatal(err) } rpcRouteHints := []*lnrpc.RouteHint{ { HopHints: []*lnrpc.HopHint{ { ChanId: 38484, NodeId: hintNodeKey, }, }, }, } request := &lnrpc.QueryRoutesRequest{ PubKey: destKey, FinalCltvDelta: 100, IgnoredNodes: [][]byte{ignoreNodeBytes}, IgnoredEdges: []*lnrpc.EdgeLocator{{ ChannelId: 555, DirectionReverse: true, }}, IgnoredPairs: []*lnrpc.NodePair{{ From: node1[:], To: node2[:], }}, UseMissionControl: useMissionControl, LastHopPubkey: lastHop[:], OutgoingChanId: outgoingChan, DestFeatures: []lnrpc.FeatureBit{lnrpc.FeatureBit_MPP_OPT}, RouteHints: rpcRouteHints, } amtSat := int64(100000) if useMsat { request.AmtMsat = amtSat * 1000 request.FeeLimit = &lnrpc.FeeLimit{ Limit: &lnrpc.FeeLimit_FixedMsat{ FixedMsat: 250000, }, } } else { request.Amt = amtSat request.FeeLimit = &lnrpc.FeeLimit{ Limit: &lnrpc.FeeLimit_Fixed{ Fixed: 250, }, } } findRoute := func(source, target route.Vertex, amt lnwire.MilliSatoshi, restrictions *routing.RestrictParams, _ record.CustomSet, routeHints map[route.Vertex][]*channeldb.ChannelEdgePolicy, finalExpiry uint16) (*route.Route, error) { if int64(amt) != amtSat*1000 { t.Fatal("unexpected amount") } if source != sourceKey { t.Fatal("unexpected source key") } if !bytes.Equal(target[:], destNodeBytes) { t.Fatal("unexpected target key") } if restrictions.FeeLimit != 250*1000 { t.Fatal("unexpected fee limit") } if restrictions.ProbabilitySource(route.Vertex{2}, route.Vertex{1}, 0, ) != 0 { t.Fatal("expecting 0% probability for ignored edge") } if restrictions.ProbabilitySource(ignoreNodeVertex, route.Vertex{6}, 0, ) != 0 { t.Fatal("expecting 0% probability for ignored node") } if restrictions.ProbabilitySource(node1, node2, 0) != 0 { t.Fatal("expecting 0% probability for ignored pair") } if *restrictions.LastHop != lastHop { t.Fatal("unexpected last hop") } if restrictions.OutgoingChannelIDs[0] != outgoingChan { t.Fatal("unexpected outgoing channel id") } if !restrictions.DestFeatures.HasFeature(lnwire.MPPOptional) { t.Fatal("unexpected dest features") } if _, ok := routeHints[hintNode]; !ok { t.Fatal("expected route hint") } expectedProb := 1.0 if useMissionControl { expectedProb = testMissionControlProb } if restrictions.ProbabilitySource(route.Vertex{4}, route.Vertex{5}, 0, ) != expectedProb { t.Fatal("expecting 100% probability") } hops := []*route.Hop{{}} return route.NewRouteFromHops(amt, 144, source, hops) } backend := &RouterBackend{ FindRoute: findRoute, SelfNode: route.Vertex{1, 2, 3}, FetchChannelCapacity: func(chanID uint64) ( btcutil.Amount, error) { return 1, nil }, MissionControl: &mockMissionControl{}, FetchChannelEndpoints: func(chanID uint64) (route.Vertex, route.Vertex, error) { if chanID != 555 { t.Fatal("expected endpoints to be fetched for "+ "channel 555, but got %v instead", chanID) } return route.Vertex{1}, route.Vertex{2}, nil }, } resp, err := backend.QueryRoutes(context.Background(), request) if err != nil { t.Fatal(err) } if len(resp.Routes) != 1 { t.Fatal("expected a single route response") } } type mockMissionControl struct { } func (m *mockMissionControl) GetProbability(fromNode, toNode route.Vertex, amt lnwire.MilliSatoshi) float64 { return testMissionControlProb } func (m *mockMissionControl) ResetHistory() error { return nil } func (m *mockMissionControl) GetHistorySnapshot() *routing.MissionControlSnapshot { return nil } func (m *mockMissionControl) GetPairHistorySnapshot(fromNode, toNode route.Vertex) routing.TimedPairResult { return routing.TimedPairResult{} } type mppOutcome byte const ( valid mppOutcome = iota invalid nompp ) type unmarshalMPPTest struct { name string mpp *lnrpc.MPPRecord outcome mppOutcome } // TestUnmarshalMPP checks both positive and negative cases of UnmarshalMPP to // assert that an MPP record is only returned when both fields are properly // specified. It also asserts that zero-values for both inputs is also valid, // but returns a nil record. func TestUnmarshalMPP(t *testing.T) { tests := []unmarshalMPPTest{ { name: "nil record", mpp: nil, outcome: nompp, }, { name: "invalid total or addr", mpp: &lnrpc.MPPRecord{ PaymentAddr: nil, TotalAmtMsat: 0, }, outcome: invalid, }, { name: "valid total only", mpp: &lnrpc.MPPRecord{ PaymentAddr: nil, TotalAmtMsat: 8, }, outcome: invalid, }, { name: "valid addr only", mpp: &lnrpc.MPPRecord{ PaymentAddr: bytes.Repeat([]byte{0x02}, 32), TotalAmtMsat: 0, }, outcome: invalid, }, { name: "valid total and invalid addr", mpp: &lnrpc.MPPRecord{ PaymentAddr: []byte{0x02}, TotalAmtMsat: 8, }, outcome: invalid, }, { name: "valid total and valid addr", mpp: &lnrpc.MPPRecord{ PaymentAddr: bytes.Repeat([]byte{0x02}, 32), TotalAmtMsat: 8, }, outcome: valid, }, } for _, test := range tests { test := test t.Run(test.name, func(t *testing.T) { testUnmarshalMPP(t, test) }) } } func testUnmarshalMPP(t *testing.T, test unmarshalMPPTest) { mpp, err := UnmarshalMPP(test.mpp) switch test.outcome { // Valid arguments should result in no error, a non-nil MPP record, and // the fields should be set correctly. case valid: if err != nil { t.Fatalf("unable to parse mpp record: %v", err) } if mpp == nil { t.Fatalf("mpp payload should be non-nil") } if int64(mpp.TotalMsat()) != test.mpp.TotalAmtMsat { t.Fatalf("incorrect total msat") } addr := mpp.PaymentAddr() if !bytes.Equal(addr[:], test.mpp.PaymentAddr) { t.Fatalf("incorrect payment addr") } // Invalid arguments should produce a failure and nil MPP record. case invalid: if err == nil { t.Fatalf("expected failure for invalid mpp") } if mpp != nil { t.Fatalf("mpp payload should be nil for failure") } // Arguments that produce no MPP field should return no error and no MPP // record. case nompp: if err != nil { t.Fatalf("failure for args resulting for no-mpp") } if mpp != nil { t.Fatalf("mpp payload should be nil for no-mpp") } default: t.Fatalf("test case has non-standard outcome") } }