lnd.xprv/lnrpc/routerrpc/router_backend_test.go

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package routerrpc
import (
"bytes"
"context"
"encoding/hex"
"testing"
"github.com/btcsuite/btcutil"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/lightningnetwork/lnd/routing"
"github.com/lightningnetwork/lnd/routing/route"
"github.com/lightningnetwork/lnd/tlv"
"github.com/lightningnetwork/lnd/lnrpc"
)
const (
destKey = "0286098b97bc843372b4426d4b276cea9aa2f48f0428d6f5b66ae101befc14f8b4"
ignoreNodeKey = "02f274f48f3c0d590449a6776e3ce8825076ac376e470e992246eebc565ef8bb2a"
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)
})
t.Run("with mission control", func(t *testing.T) {
testQueryRoutes(t, true)
})
}
func testQueryRoutes(t *testing.T, useMissionControl 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)
}
request := &lnrpc.QueryRoutesRequest{
PubKey: destKey,
Amt: 100000,
FinalCltvDelta: 100,
FeeLimit: &lnrpc.FeeLimit{
Limit: &lnrpc.FeeLimit_Fixed{
Fixed: 250,
},
},
IgnoredNodes: [][]byte{ignoreNodeBytes},
IgnoredEdges: []*lnrpc.EdgeLocator{{
ChannelId: 555,
DirectionReverse: true,
}},
IgnoredPairs: []*lnrpc.NodePair{{
From: node1[:],
To: node2[:],
}},
UseMissionControl: useMissionControl,
}
findRoute := func(source, target route.Vertex,
amt lnwire.MilliSatoshi, restrictions *routing.RestrictParams,
_ []tlv.Record,
finalExpiry ...uint16) (*route.Route, error) {
if int64(amt) != request.Amt*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")
}
expectedProb := 1.0
if useMissionControl {
expectedProb = testMissionControlProb
}
if restrictions.ProbabilitySource(route.Vertex{4},
route.Vertex{5}, 0,
) != expectedProb {
t.Fatal("expecting 100% probability")
}
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hops := []*route.Hop{{}}
return route.NewRouteFromHops(amt, 144, source, hops)
}
backend := &RouterBackend{
MaxPaymentMSat: lnwire.NewMSatFromSatoshis(1000000),
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
}
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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")
}
}