From c33d94ff279793f13b6f11d2a4899e56d8295322 Mon Sep 17 00:00:00 2001 From: Joost Jager Date: Thu, 7 May 2020 11:48:39 +0200 Subject: [PATCH] routing+routerrpc: add multiple outgoing channel restriction --- cmd/lncli/cmd_pay.go | 5 +- lnrpc/routerrpc/router.pb.go | 302 +++++++++++++------------ lnrpc/routerrpc/router.proto | 11 +- lnrpc/routerrpc/router_backend.go | 16 +- lnrpc/routerrpc/router_backend_test.go | 2 +- routing/pathfind.go | 27 ++- routing/pathfind_test.go | 36 ++- routing/payment_session.go | 16 +- routing/router.go | 15 +- routing/unified_policies.go | 12 +- rpcserver.go | 59 ++--- 11 files changed, 287 insertions(+), 214 deletions(-) diff --git a/cmd/lncli/cmd_pay.go b/cmd/lncli/cmd_pay.go index 0f99a1fa..fbd4a510 100644 --- a/cmd/lncli/cmd_pay.go +++ b/cmd/lncli/cmd_pay.go @@ -321,7 +321,10 @@ func sendPaymentRequest(ctx *cli.Context, client := lnrpc.NewLightningClient(conn) routerClient := routerrpc.NewRouterClient(conn) - req.OutgoingChanId = ctx.Uint64("outgoing_chan_id") + outChan := ctx.Uint64("outgoing_chan_id") + if outChan != 0 { + req.OutgoingChanIds = []uint64{outChan} + } if ctx.IsSet(lastHopFlag.Name) { lastHop, err := route.NewVertexFromStr( ctx.String(lastHopFlag.Name), diff --git a/lnrpc/routerrpc/router.pb.go b/lnrpc/routerrpc/router.pb.go index ac1c23c2..e1ff3b25 100644 --- a/lnrpc/routerrpc/router.pb.go +++ b/lnrpc/routerrpc/router.pb.go @@ -248,9 +248,14 @@ type SendPaymentRequest struct { //The fields fee_limit_sat and fee_limit_msat are mutually exclusive. FeeLimitMsat int64 `protobuf:"varint,13,opt,name=fee_limit_msat,json=feeLimitMsat,proto3" json:"fee_limit_msat,omitempty"` // - //The channel id of the channel that must be taken to the first hop. If zero, + //Deprecated, use outgoing_chan_ids. The channel id of the channel that must + //be taken to the first hop. If zero, any channel may be used (unless + //outgoing_chan_ids are set). + OutgoingChanId uint64 `protobuf:"varint,8,opt,name=outgoing_chan_id,json=outgoingChanId,proto3" json:"outgoing_chan_id,omitempty"` // Deprecated: Do not use. + // + //The channel ids of the channels are allowed for the first hop. If empty, //any channel may be used. - OutgoingChanId uint64 `protobuf:"varint,8,opt,name=outgoing_chan_id,json=outgoingChanId,proto3" json:"outgoing_chan_id,omitempty"` + OutgoingChanIds []uint64 `protobuf:"varint,19,rep,packed,name=outgoing_chan_ids,json=outgoingChanIds,proto3" json:"outgoing_chan_ids,omitempty"` // //The pubkey of the last hop of the route. If empty, any hop may be used. LastHopPubkey []byte `protobuf:"bytes,14,opt,name=last_hop_pubkey,json=lastHopPubkey,proto3" json:"last_hop_pubkey,omitempty"` @@ -379,6 +384,7 @@ func (m *SendPaymentRequest) GetFeeLimitMsat() int64 { return 0 } +// Deprecated: Do not use. func (m *SendPaymentRequest) GetOutgoingChanId() uint64 { if m != nil { return m.OutgoingChanId @@ -386,6 +392,13 @@ func (m *SendPaymentRequest) GetOutgoingChanId() uint64 { return 0 } +func (m *SendPaymentRequest) GetOutgoingChanIds() []uint64 { + if m != nil { + return m.OutgoingChanIds + } + return nil +} + func (m *SendPaymentRequest) GetLastHopPubkey() []byte { if m != nil { return m.LastHopPubkey @@ -1746,148 +1759,149 @@ func init() { func init() { proto.RegisterFile("routerrpc/router.proto", fileDescriptor_7a0613f69d37b0a5) } var fileDescriptor_7a0613f69d37b0a5 = []byte{ - // 2248 bytes of a gzipped FileDescriptorProto - 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x58, 0xcd, 0x76, 0xdb, 0xb8, - 0xf5, 0x1f, 0x4a, 0x94, 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0xb8, 0x75, 0xae, 0xed, 0xc6, 0xfd, 0xb7, 0xd2, 0xc6, 0x83, 0x4d, + 0x97, 0xb3, 0xa7, 0x0a, 0x3a, 0x4b, 0xf2, 0x22, 0xfd, 0x49, 0xe5, 0x3d, 0x89, 0xae, 0x6f, 0x6e, + 0x22, 0x8b, 0xd8, 0xc8, 0xff, 0x29, 0xa7, 0x3c, 0x55, 0x90, 0x03, 0x95, 0x6c, 0x72, 0xbf, 0x37, + 0xeb, 0xdf, 0xa7, 0xf0, 0xf8, 0xeb, 0xdf, 0x1d, 0x5e, 0x79, 0x6c, 0xba, 0xb8, 0x3c, 0x18, 0x85, + 0xb3, 0x43, 0xf1, 0x4b, 0x46, 0xe0, 0x05, 0x57, 0x01, 0x65, 0x6f, 0xc3, 0xe8, 0xfa, 0xd0, 0x0f, + 0xc6, 0x87, 0xa2, 0x6e, 0x0e, 0x97, 0x7a, 0x2e, 0xb7, 0xc4, 0x0f, 0x99, 0x3f, 0xfd, 0x4f, 0x00, + 0x00, 0x00, 0xff, 0xff, 0x61, 0x45, 0xd3, 0x59, 0xf8, 0x14, 0x00, 0x00, } // Reference imports to suppress errors if they are not otherwise used. diff --git a/lnrpc/routerrpc/router.proto b/lnrpc/routerrpc/router.proto index c3e04597..8d51621a 100644 --- a/lnrpc/routerrpc/router.proto +++ b/lnrpc/routerrpc/router.proto @@ -154,10 +154,17 @@ message SendPaymentRequest { int64 fee_limit_msat = 13; /* - The channel id of the channel that must be taken to the first hop. If zero, + Deprecated, use outgoing_chan_ids. The channel id of the channel that must + be taken to the first hop. If zero, any channel may be used (unless + outgoing_chan_ids are set). + */ + uint64 outgoing_chan_id = 8 [jstype = JS_STRING, deprecated = true]; + + /* + The channel ids of the channels are allowed for the first hop. If empty, any channel may be used. */ - uint64 outgoing_chan_id = 8 [jstype = JS_STRING]; + repeated uint64 outgoing_chan_ids = 19; /* The pubkey of the last hop of the route. If empty, any hop may be used. diff --git a/lnrpc/routerrpc/router_backend.go b/lnrpc/routerrpc/router_backend.go index 354e5e29..4292ee65 100644 --- a/lnrpc/routerrpc/router_backend.go +++ b/lnrpc/routerrpc/router_backend.go @@ -248,7 +248,7 @@ func (r *RouterBackend) QueryRoutes(ctx context.Context, // Pass along an outgoing channel restriction if specified. if in.OutgoingChanId != 0 { - restrictions.OutgoingChannelID = &in.OutgoingChanId + restrictions.OutgoingChannelIDs = []uint64{in.OutgoingChanId} } // Pass along a last hop restriction if specified. @@ -522,9 +522,19 @@ func (r *RouterBackend) extractIntentFromSendRequest( payIntent := &routing.LightningPayment{} - // Pass along an outgoing channel restriction if specified. + // Pass along restrictions on the outgoing channels that may be used. + payIntent.OutgoingChannelIDs = rpcPayReq.OutgoingChanIds + + // Add the deprecated single outgoing channel restriction if present. if rpcPayReq.OutgoingChanId != 0 { - payIntent.OutgoingChannelID = &rpcPayReq.OutgoingChanId + if payIntent.OutgoingChannelIDs != nil { + return nil, errors.New("outgoing_chan_id and " + + "outgoing_chan_ids are mutually exclusive") + } + + payIntent.OutgoingChannelIDs = append( + payIntent.OutgoingChannelIDs, rpcPayReq.OutgoingChanId, + ) } // Pass along a last hop restriction if specified. diff --git a/lnrpc/routerrpc/router_backend_test.go b/lnrpc/routerrpc/router_backend_test.go index 33a0ccfb..3e2bd916 100644 --- a/lnrpc/routerrpc/router_backend_test.go +++ b/lnrpc/routerrpc/router_backend_test.go @@ -159,7 +159,7 @@ func testQueryRoutes(t *testing.T, useMissionControl bool, useMsat bool) { t.Fatal("unexpected last hop") } - if *restrictions.OutgoingChannelID != outgoingChan { + if restrictions.OutgoingChannelIDs[0] != outgoingChan { t.Fatal("unexpected outgoing channel id") } diff --git a/routing/pathfind.go b/routing/pathfind.go index e5def09b..70efb1c2 100644 --- a/routing/pathfind.go +++ b/routing/pathfind.go @@ -284,9 +284,9 @@ type RestrictParams struct { // the source to the target. FeeLimit lnwire.MilliSatoshi - // OutgoingChannelID is the channel that needs to be taken to the first - // hop. If nil, any channel may be used. - OutgoingChannelID *uint64 + // OutgoingChannelIDs is the list of channels that are allowed for the + // first hop. If nil, any channel may be used. + OutgoingChannelIDs []uint64 // LastHop is the pubkey of the last node before the final destination // is reached. If nil, any node may be used. @@ -329,7 +329,7 @@ type PathFindingConfig struct { // getOutgoingBalance returns the maximum available balance in any of the // channels of the given node. The second return parameters is the total // available balance. -func getOutgoingBalance(node route.Vertex, outgoingChan *uint64, +func getOutgoingBalance(node route.Vertex, outgoingChans map[uint64]struct{}, bandwidthHints map[uint64]lnwire.MilliSatoshi, g routingGraph) (lnwire.MilliSatoshi, lnwire.MilliSatoshi, error) { @@ -344,8 +344,10 @@ func getOutgoingBalance(node route.Vertex, outgoingChan *uint64, chanID := outEdge.ChannelID // Enforce outgoing channel restriction. - if outgoingChan != nil && chanID != *outgoingChan { - return nil + if outgoingChans != nil { + if _, ok := outgoingChans[chanID]; !ok { + return nil + } } bandwidth, ok := bandwidthHints[chanID] @@ -447,13 +449,22 @@ func findPath(g *graphParams, r *RestrictParams, cfg *PathFindingConfig, return nil, errNoPaymentAddr } + // Set up outgoing channel map for quicker access. + var outgoingChanMap map[uint64]struct{} + if len(r.OutgoingChannelIDs) > 0 { + outgoingChanMap = make(map[uint64]struct{}) + for _, outChan := range r.OutgoingChannelIDs { + outgoingChanMap[outChan] = struct{}{} + } + } + // If we are routing from ourselves, check that we have enough local // balance available. self := g.graph.sourceNode() if source == self { max, total, err := getOutgoingBalance( - self, r.OutgoingChannelID, g.bandwidthHints, g.graph, + self, outgoingChanMap, g.bandwidthHints, g.graph, ) if err != nil { return nil, err @@ -763,7 +774,7 @@ func findPath(g *graphParams, r *RestrictParams, cfg *PathFindingConfig, pivot := partialPath.node // Create unified policies for all incoming connections. - u := newUnifiedPolicies(self, pivot, r.OutgoingChannelID) + u := newUnifiedPolicies(self, pivot, outgoingChanMap) err := u.addGraphPolicies(g.graph) if err != nil { diff --git a/routing/pathfind_test.go b/routing/pathfind_test.go index 545aefd8..28bd2933 100644 --- a/routing/pathfind_test.go +++ b/routing/pathfind_test.go @@ -2249,11 +2249,12 @@ func TestRestrictOutgoingChannel(t *testing.T) { // Define channel id constants const ( - chanSourceA = 1 - chanATarget = 4 - chanSourceB1 = 2 - chanSourceB2 = 3 - chanBTarget = 5 + chanSourceA = 1 + chanATarget = 4 + chanSourceB1 = 2 + chanSourceB2 = 3 + chanBTarget = 5 + chanSourceTarget = 6 ) // Set up a test graph with three possible paths from roasbeef to @@ -2276,6 +2277,9 @@ func TestRestrictOutgoingChannel(t *testing.T) { Expiry: 144, FeeRate: 800, }, chanBTarget), + symmetricTestChannel("roasbeef", "target", 100000, &testChannelPolicy{ + Expiry: 144, + }, chanSourceTarget), } ctx := newPathFindingTestContext(t, testChannels, "roasbeef") @@ -2290,9 +2294,9 @@ func TestRestrictOutgoingChannel(t *testing.T) { target := ctx.keyFromAlias("target") outgoingChannelID := uint64(chanSourceB1) - // Find the best path given the restriction to only use chanSourceB1 as - // the outgoing channel. - ctx.restrictParams.OutgoingChannelID = &outgoingChannelID + // Find the best path given the restriction to only use channel 2 as the + // outgoing channel. + ctx.restrictParams.OutgoingChannelIDs = []uint64{outgoingChannelID} path, err := ctx.findPath(target, paymentAmt) if err != nil { t.Fatalf("unable to find path: %v", err) @@ -2305,6 +2309,20 @@ func TestRestrictOutgoingChannel(t *testing.T) { "but channel %v was selected instead", chanSourceB1, path[0].ChannelID) } + + // If a direct channel to target is allowed as well, that channel is + // expected to be selected because the routing fees are zero. + ctx.restrictParams.OutgoingChannelIDs = []uint64{ + chanSourceB1, chanSourceTarget, + } + path, err = ctx.findPath(target, paymentAmt) + if err != nil { + t.Fatalf("unable to find path: %v", err) + } + if path[0].ChannelID != chanSourceTarget { + t.Fatalf("expected route to pass through channel %v", + chanSourceTarget) + } } // TestRestrictLastHop asserts that a last hop restriction is obeyed by the path @@ -2766,7 +2784,7 @@ func TestRouteToSelf(t *testing.T) { outgoingChanID := uint64(1) lastHop := ctx.keyFromAlias("b") - ctx.restrictParams.OutgoingChannelID = &outgoingChanID + ctx.restrictParams.OutgoingChannelIDs = []uint64{outgoingChanID} ctx.restrictParams.LastHop = &lastHop // Find the best path to self given that we want to go out via channel 1 diff --git a/routing/payment_session.go b/routing/payment_session.go index ed22b8c6..b4aac5aa 100644 --- a/routing/payment_session.go +++ b/routing/payment_session.go @@ -202,14 +202,14 @@ func (p *paymentSession) RequestRoute(maxAmt, feeLimit lnwire.MilliSatoshi, // to our destination, respecting the recommendations from // MissionControl. restrictions := &RestrictParams{ - ProbabilitySource: p.missionControl.GetProbability, - FeeLimit: feeLimit, - OutgoingChannelID: p.payment.OutgoingChannelID, - LastHop: p.payment.LastHop, - CltvLimit: cltvLimit, - DestCustomRecords: p.payment.DestCustomRecords, - DestFeatures: p.payment.DestFeatures, - PaymentAddr: p.payment.PaymentAddr, + ProbabilitySource: p.missionControl.GetProbability, + FeeLimit: feeLimit, + OutgoingChannelIDs: p.payment.OutgoingChannelIDs, + LastHop: p.payment.LastHop, + CltvLimit: cltvLimit, + DestCustomRecords: p.payment.DestCustomRecords, + DestFeatures: p.payment.DestFeatures, + PaymentAddr: p.payment.PaymentAddr, } finalHtlcExpiry := int32(height) + int32(finalCltvDelta) diff --git a/routing/router.go b/routing/router.go index 21d9e4ea..d0ac67fd 100644 --- a/routing/router.go +++ b/routing/router.go @@ -1594,9 +1594,9 @@ type LightningPayment struct { // destination successfully. RouteHints [][]zpay32.HopHint - // OutgoingChannelID is the channel that needs to be taken to the first - // hop. If nil, any channel may be used. - OutgoingChannelID *uint64 + // OutgoingChannelIDs is the list of channels that are allowed for the + // first hop. If nil, any channel may be used. + OutgoingChannelIDs []uint64 // LastHop is the pubkey of the last node before the final destination // is reached. If nil, any node may be used. @@ -2379,6 +2379,13 @@ func (r *ChannelRouter) BuildRoute(amt *lnwire.MilliSatoshi, log.Tracef("BuildRoute called: hopsCount=%v, amt=%v", len(hops), amt) + var outgoingChans map[uint64]struct{} + if outgoingChan != nil { + outgoingChans = map[uint64]struct{}{ + *outgoingChan: {}, + } + } + // If no amount is specified, we need to build a route for the minimum // amount that this route can carry. useMinAmt := amt == nil @@ -2444,7 +2451,7 @@ func (r *ChannelRouter) BuildRoute(amt *lnwire.MilliSatoshi, // Build unified policies for this hop based on the channels // known in the graph. - u := newUnifiedPolicies(source, toNode, outgoingChan) + u := newUnifiedPolicies(source, toNode, outgoingChans) err := u.addGraphPolicies(routingTx) if err != nil { diff --git a/routing/unified_policies.go b/routing/unified_policies.go index 3759175a..0ff50938 100644 --- a/routing/unified_policies.go +++ b/routing/unified_policies.go @@ -21,13 +21,13 @@ type unifiedPolicies struct { // outChanRestr is an optional outgoing channel restriction for the // local channel to use. - outChanRestr *uint64 + outChanRestr map[uint64]struct{} } // newUnifiedPolicies instantiates a new unifiedPolicies object. Channel // policies can be added to this object. func newUnifiedPolicies(sourceNode, toNode route.Vertex, - outChanRestr *uint64) *unifiedPolicies { + outChanRestr map[uint64]struct{}) *unifiedPolicies { return &unifiedPolicies{ policies: make(map[route.Vertex]*unifiedPolicy), @@ -45,10 +45,10 @@ func (u *unifiedPolicies) addPolicy(fromNode route.Vertex, localChan := fromNode == u.sourceNode // Skip channels if there is an outgoing channel restriction. - if localChan && u.outChanRestr != nil && - *u.outChanRestr != edge.ChannelID { - - return + if localChan && u.outChanRestr != nil { + if _, ok := u.outChanRestr[edge.ChannelID]; !ok { + return + } } // Update the policies map. diff --git a/rpcserver.go b/rpcserver.go index dcac9068..189d9d38 100644 --- a/rpcserver.go +++ b/rpcserver.go @@ -3687,18 +3687,18 @@ func (r *rpcServer) unmarshallSendToRouteRequest( // hints), or we'll get a fully populated route from the user that we'll pass // directly to the channel router for dispatching. type rpcPaymentIntent struct { - msat lnwire.MilliSatoshi - feeLimit lnwire.MilliSatoshi - cltvLimit uint32 - dest route.Vertex - rHash [32]byte - cltvDelta uint16 - routeHints [][]zpay32.HopHint - outgoingChannelID *uint64 - lastHop *route.Vertex - destFeatures *lnwire.FeatureVector - paymentAddr *[32]byte - payReq []byte + msat lnwire.MilliSatoshi + feeLimit lnwire.MilliSatoshi + cltvLimit uint32 + dest route.Vertex + rHash [32]byte + cltvDelta uint16 + routeHints [][]zpay32.HopHint + outgoingChannelIDs []uint64 + lastHop *route.Vertex + destFeatures *lnwire.FeatureVector + paymentAddr *[32]byte + payReq []byte destCustomRecords record.CustomSet @@ -3734,9 +3734,12 @@ func (r *rpcServer) extractPaymentIntent(rpcPayReq *rpcPaymentRequest) (rpcPayme } // If there are no routes specified, pass along a outgoing channel - // restriction if specified. + // restriction if specified. The main server rpc does not support + // multiple channel restrictions. if rpcPayReq.OutgoingChanId != 0 { - payIntent.outgoingChannelID = &rpcPayReq.OutgoingChanId + payIntent.outgoingChannelIDs = []uint64{ + rpcPayReq.OutgoingChanId, + } } // Pass along a last hop restriction if specified. @@ -3951,20 +3954,20 @@ func (r *rpcServer) dispatchPaymentIntent( // router, otherwise we'll create a payment session to execute it. if payIntent.route == nil { payment := &routing.LightningPayment{ - Target: payIntent.dest, - Amount: payIntent.msat, - FinalCLTVDelta: payIntent.cltvDelta, - FeeLimit: payIntent.feeLimit, - CltvLimit: payIntent.cltvLimit, - PaymentHash: payIntent.rHash, - RouteHints: payIntent.routeHints, - OutgoingChannelID: payIntent.outgoingChannelID, - LastHop: payIntent.lastHop, - PaymentRequest: payIntent.payReq, - PayAttemptTimeout: routing.DefaultPayAttemptTimeout, - DestCustomRecords: payIntent.destCustomRecords, - DestFeatures: payIntent.destFeatures, - PaymentAddr: payIntent.paymentAddr, + Target: payIntent.dest, + Amount: payIntent.msat, + FinalCLTVDelta: payIntent.cltvDelta, + FeeLimit: payIntent.feeLimit, + CltvLimit: payIntent.cltvLimit, + PaymentHash: payIntent.rHash, + RouteHints: payIntent.routeHints, + OutgoingChannelIDs: payIntent.outgoingChannelIDs, + LastHop: payIntent.lastHop, + PaymentRequest: payIntent.payReq, + PayAttemptTimeout: routing.DefaultPayAttemptTimeout, + DestCustomRecords: payIntent.destCustomRecords, + DestFeatures: payIntent.destFeatures, + PaymentAddr: payIntent.paymentAddr, // Don't enable multi-part payments on the main rpc. // Users need to use routerrpc for that.