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/lnrpc"
)
const (
destKey = "0286098b97bc843372b4426d4b276cea9aa2f48f0428d6f5b66ae101befc14f8b4"
ignoreNodeKey = "02f274f48f3c0d590449a6776e3ce8825076ac376e470e992246eebc565ef8bb2a"
)
var (
sourceKey = route.Vertex{1, 2, 3}
)
// TestQueryRoutes asserts that query routes rpc parameters are properly parsed
// and passed onto path finding.
func TestQueryRoutes(t *testing.T) {
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)
}
ignoredEdge := routing.EdgeLocator{
ChannelID: 555,
Direction: 1,
}
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,
}},
}
findRoute := func(source, target route.Vertex,
amt lnwire.MilliSatoshi, restrictions *routing.RestrictParams,
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{},
ignoredEdge, 0,
) != 0 {
t.Fatal("expecting 0% probability for ignored edge")
}
if restrictions.ProbabilitySource(ignoreNodeVertex,
routing.EdgeLocator{}, 0,
) != 0 {
t.Fatal("expecting 0% probability for ignored node")
}
if restrictions.ProbabilitySource(route.Vertex{},
routing.EdgeLocator{}, 0,
) != 1 {
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
},
}
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")
}
}