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routing+routerrpc+lncli: enable last hop restriction for payments

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This commit is contained in:
Joost Jager 2019-11-18 12:08:42 +01:00
parent 814dbea745
commit f28941c7e4
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GPG key ID: A61B9D4C393C59C7
10 changed files with 760 additions and 675 deletions
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29
cmd/lncli/commands.go
View file

@ -24,6 +24,7 @@ import (
"github.com/golang/protobuf/proto"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
"github.com/lightningnetwork/lnd/routing/route"
"github.com/lightningnetwork/lnd/walletunlocker"
"github.com/urfave/cli"
"golang.org/x/crypto/ssh/terminal"
@ -2040,11 +2041,18 @@ func closedChannels(ctx *cli.Context) error {
return nil
}
var cltvLimitFlag = cli.UintFlag{
Name: "cltv_limit",
Usage: "the maximum time lock that may be used for " +
"this payment",
}
var (
cltvLimitFlag = cli.UintFlag{
Name: "cltv_limit",
Usage: "the maximum time lock that may be used for " +
"this payment",
}
lastHopFlag = cli.StringFlag{
Name: "last_hop",
Usage: "pubkey of the last hop to use for this payment",
}
)
// paymentFlags returns common flags for sendpayment and payinvoice.
func paymentFlags() []cli.Flag {
@ -2065,6 +2073,7 @@ func paymentFlags() []cli.Flag {
"payment",
},
cltvLimitFlag,
lastHopFlag,
cli.Uint64Flag{
Name: "outgoing_chan_id",
Usage: "short channel id of the outgoing channel to " +
@ -2281,6 +2290,16 @@ func sendPaymentRequest(ctx *cli.Context, req *lnrpc.SendRequest) error {
req.FeeLimit = feeLimit
req.OutgoingChanId = ctx.Uint64("outgoing_chan_id")
if ctx.IsSet(lastHopFlag.Name) {
lastHop, err := route.NewVertexFromStr(
ctx.String(lastHopFlag.Name),
)
if err != nil {
return err
}
req.LastHopPubkey = lastHop[:]
}
req.CltvLimit = uint32(ctx.Int(cltvLimitFlag.Name))
amt := req.Amt

259
lnrpc/routerrpc/router.pb.go
View file

@ -231,6 +231,9 @@ type SendPaymentRequest struct {
//any channel may be used.
OutgoingChanId uint64 `protobuf:"varint,8,opt,name=outgoing_chan_id,json=outgoingChanId,proto3" json:"outgoing_chan_id,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"`
//*
//An optional maximum total time lock for the route. This should not exceed
//lnd's `--max-cltv-expiry` setting. If zero, then the value of
//`--max-cltv-expiry` is enforced.
@ -343,6 +346,13 @@ func (m *SendPaymentRequest) GetOutgoingChanId() uint64 {
return 0
}
func (m *SendPaymentRequest) GetLastHopPubkey() []byte {
if m != nil {
return m.LastHopPubkey
}
return nil
}
func (m *SendPaymentRequest) GetCltvLimit() int32 {
if m != nil {
return m.CltvLimit
@ -1445,130 +1455,131 @@ func init() {
func init() { proto.RegisterFile("routerrpc/router.proto", fileDescriptor_7a0613f69d37b0a5) }
var fileDescriptor_7a0613f69d37b0a5 = []byte{
// 1957 bytes of a gzipped FileDescriptorProto
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}
// Reference imports to suppress errors if they are not otherwise used.

5
lnrpc/routerrpc/router.proto
View file

@ -77,6 +77,11 @@ message SendPaymentRequest {
*/
uint64 outgoing_chan_id = 8 [jstype = JS_STRING];
/**
The pubkey of the last hop of the route. If empty, any hop may be used.
*/
bytes last_hop_pubkey = 14;
/**
An optional maximum total time lock for the route. This should not exceed
lnd's `--max-cltv-expiry` setting. If zero, then the value of

11
lnrpc/routerrpc/router_backend.go
View file

@ -497,6 +497,17 @@ func (r *RouterBackend) extractIntentFromSendRequest(
payIntent.OutgoingChannelID = &rpcPayReq.OutgoingChanId
}
// Pass along a last hop restriction if specified.
if len(rpcPayReq.LastHopPubkey) > 0 {
lastHop, err := route.NewVertexFromBytes(
rpcPayReq.LastHopPubkey,
)
if err != nil {
return nil, err
}
payIntent.LastHop = &lastHop
}
// Take the CLTV limit from the request if set, otherwise use the max.
cltvLimit, err := ValidateCLTVLimit(
uint32(rpcPayReq.CltvLimit), r.MaxTotalTimelock,

1103
lnrpc/rpc.pb.go
View file

File diff suppressed because it is too large Load diff

5
lnrpc/rpc.proto
View file

@ -937,6 +937,11 @@ message SendRequest {
*/
uint64 outgoing_chan_id = 9 [jstype = JS_STRING];
/**
The pubkey of the last hop of the route. If empty, any hop may be used.
*/
bytes last_hop_pubkey = 13;
/**
An optional maximum total time lock for the route. This should not exceed
lnd's `--max-cltv-expiry` setting. If zero, then the value of

5
lnrpc/rpc.swagger.json
View file

@ -3661,6 +3661,11 @@
"format": "uint64",
"description": "*\nThe channel id of the channel that must be taken to the first hop. If zero,\nany channel may be used."
},
"last_hop_pubkey": {
"type": "string",
"format": "byte",
"description": "*\nThe pubkey of the last hop of the route. If empty, any hop may be used."
},
"cltv_limit": {
"type": "integer",
"format": "int64",

1
routing/payment_session.go
View file

@ -89,6 +89,7 @@ func (p *paymentSession) RequestRoute(payment *LightningPayment,
ProbabilitySource: ss.MissionControl.GetProbability,
FeeLimit: payment.FeeLimit,
OutgoingChannelID: payment.OutgoingChannelID,
LastHop: payment.LastHop,
CltvLimit: cltvLimit,
}

4
routing/router.go
View file

@ -1596,6 +1596,10 @@ type LightningPayment struct {
// hop. If nil, any channel may be used.
OutgoingChannelID *uint64
// LastHop is the pubkey of the last node before the final destination
// is reached. If nil, any node may be used.
LastHop *route.Vertex
// PaymentRequest is an optional payment request that this payment is
// attempting to complete.
PaymentRequest []byte

13
rpcserver.go
View file

@ -3017,6 +3017,7 @@ type rpcPaymentIntent struct {
cltvDelta uint16
routeHints [][]zpay32.HopHint
outgoingChannelID *uint64
lastHop *route.Vertex
payReq []byte
destTLV []tlv.Record
@ -3058,6 +3059,17 @@ func extractPaymentIntent(rpcPayReq *rpcPaymentRequest) (rpcPaymentIntent, error
payIntent.outgoingChannelID = &rpcPayReq.OutgoingChanId
}
// Pass along a last hop restriction if specified.
if len(rpcPayReq.LastHopPubkey) > 0 {
lastHop, err := route.NewVertexFromBytes(
rpcPayReq.LastHopPubkey,
)
if err != nil {
return payIntent, err
}
payIntent.lastHop = &lastHop
}
// Take the CLTV limit from the request if set, otherwise use the max.
cltvLimit, err := routerrpc.ValidateCLTVLimit(
rpcPayReq.CltvLimit, cfg.MaxOutgoingCltvExpiry,
@ -3237,6 +3249,7 @@ func (r *rpcServer) dispatchPaymentIntent(
PaymentHash: payIntent.rHash,
RouteHints: payIntent.routeHints,
OutgoingChannelID: payIntent.outgoingChannelID,
LastHop: payIntent.lastHop,
PaymentRequest: payIntent.payReq,
PayAttemptTimeout: routing.DefaultPayAttemptTimeout,
FinalDestRecords: payIntent.destTLV,