htlcswitch: accept failure reason for intercepted htlcs

This commit is contained in:
Joost Jager 2022-01-18 15:17:05 +01:00
parent 60625b6c1a
commit e2b56f212f
No known key found for this signature in database
GPG Key ID: A61B9D4C393C59C7
8 changed files with 456 additions and 221 deletions

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@ -64,6 +64,11 @@
* [Add dev only RPC subserver and the devrpc.ImportGraph * [Add dev only RPC subserver and the devrpc.ImportGraph
call](https://github.com/lightningnetwork/lnd/pull/6149) call](https://github.com/lightningnetwork/lnd/pull/6149)
* [Extend](https://github.com/lightningnetwork/lnd/pull/6177) the HTLC
interceptor API to provide more control over failure messages. With this
change, it allows encrypted failure messages to be returned to the sender.
Additionally it is possible to signal a malformed htlc.
## Documentation ## Documentation

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@ -1,6 +1,7 @@
package htlcswitch package htlcswitch
import ( import (
"crypto/sha256"
"fmt" "fmt"
"sync" "sync"
@ -15,6 +16,10 @@ var (
// ErrFwdNotExists is an error returned when the caller tries to resolve // ErrFwdNotExists is an error returned when the caller tries to resolve
// a forward that doesn't exist anymore. // a forward that doesn't exist anymore.
ErrFwdNotExists = errors.New("forward does not exist") ErrFwdNotExists = errors.New("forward does not exist")
// ErrUnsupportedFailureCode when processing of an unsupported failure
// code is attempted.
ErrUnsupportedFailureCode = errors.New("unsupported failure code")
) )
// InterceptableSwitch is an implementation of ForwardingSwitch interface. // InterceptableSwitch is an implementation of ForwardingSwitch interface.
@ -137,21 +142,63 @@ func (f *interceptedForward) Resume() error {
return f.htlcSwitch.ForwardPackets(f.linkQuit, f.packet) return f.htlcSwitch.ForwardPackets(f.linkQuit, f.packet)
} }
// Fail forward a failed packet to the switch. // Fail notifies the intention to fail an existing hold forward with an
func (f *interceptedForward) Fail() error { // encrypted failure reason.
update, err := f.htlcSwitch.cfg.FetchLastChannelUpdate( func (f *interceptedForward) Fail(reason []byte) error {
f.packet.incomingChanID, obfuscatedReason := f.packet.obfuscator.IntermediateEncrypt(reason)
)
if err != nil { return f.resolve(&lnwire.UpdateFailHTLC{
return err Reason: obfuscatedReason,
})
}
// FailWithCode notifies the intention to fail an existing hold forward with the
// specified failure code.
func (f *interceptedForward) FailWithCode(code lnwire.FailCode) error {
shaOnionBlob := func() [32]byte {
return sha256.Sum256(f.htlc.OnionBlob[:])
} }
reason, err := f.packet.obfuscator.EncryptFirstHop( // Create a local failure.
lnwire.NewTemporaryChannelFailure(update), var failureMsg lnwire.FailureMessage
)
switch code {
case lnwire.CodeInvalidOnionVersion:
failureMsg = &lnwire.FailInvalidOnionVersion{
OnionSHA256: shaOnionBlob(),
}
case lnwire.CodeInvalidOnionHmac:
failureMsg = &lnwire.FailInvalidOnionHmac{
OnionSHA256: shaOnionBlob(),
}
case lnwire.CodeInvalidOnionKey:
failureMsg = &lnwire.FailInvalidOnionKey{
OnionSHA256: shaOnionBlob(),
}
case lnwire.CodeTemporaryChannelFailure:
update, err := f.htlcSwitch.cfg.FetchLastChannelUpdate(
f.packet.incomingChanID,
)
if err != nil {
return err
}
failureMsg = lnwire.NewTemporaryChannelFailure(update)
default:
return ErrUnsupportedFailureCode
}
// Encrypt the failure for the first hop. This node will be the origin
// of the failure.
reason, err := f.packet.obfuscator.EncryptFirstHop(failureMsg)
if err != nil { if err != nil {
return fmt.Errorf("failed to encrypt failure reason %v", err) return fmt.Errorf("failed to encrypt failure reason %v", err)
} }
return f.resolve(&lnwire.UpdateFailHTLC{ return f.resolve(&lnwire.UpdateFailHTLC{
Reason: reason, Reason: reason,
}) })

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@ -297,8 +297,13 @@ type InterceptedForward interface {
// forward with a given preimage. // forward with a given preimage.
Settle(lntypes.Preimage) error Settle(lntypes.Preimage) error
// Fails notifies the intention to fail an existing hold forward // Fail notifies the intention to fail an existing hold forward with an
Fail() error // encrypted failure reason.
Fail(reason []byte) error
// FailWithCode notifies the intention to fail an existing hold forward
// with the specified failure code.
FailWithCode(code lnwire.FailCode) error
} }
// htlcNotifier is an interface which represents the input side of the // htlcNotifier is an interface which represents the input side of the

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@ -1,6 +1,7 @@
package htlcswitch package htlcswitch
import ( import (
"bytes"
"crypto/rand" "crypto/rand"
"crypto/sha256" "crypto/sha256"
"fmt" "fmt"
@ -18,6 +19,7 @@ import (
"github.com/lightningnetwork/lnd/lntypes" "github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/lnwire" "github.com/lightningnetwork/lnd/lnwire"
"github.com/lightningnetwork/lnd/ticker" "github.com/lightningnetwork/lnd/ticker"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require" "github.com/stretchr/testify/require"
) )
@ -3142,7 +3144,8 @@ type mockForwardInterceptor struct {
intercepted InterceptedForward intercepted InterceptedForward
} }
func (m *mockForwardInterceptor) InterceptForwardHtlc(intercepted InterceptedForward) bool { func (m *mockForwardInterceptor) InterceptForwardHtlc(
intercepted InterceptedForward) bool {
m.intercepted = intercepted m.intercepted = intercepted
return true return true
@ -3152,8 +3155,14 @@ func (m *mockForwardInterceptor) settle(preimage lntypes.Preimage) error {
return m.intercepted.Settle(preimage) return m.intercepted.Settle(preimage)
} }
func (m *mockForwardInterceptor) fail() error { func (m *mockForwardInterceptor) fail(reason []byte) error {
return m.intercepted.Fail() return m.intercepted.Fail(reason)
}
func (m *mockForwardInterceptor) failWithCode(
code lnwire.FailCode) error {
return m.intercepted.FailWithCode(code)
} }
func (m *mockForwardInterceptor) resume() error { func (m *mockForwardInterceptor) resume() error {
@ -3170,7 +3179,7 @@ func assertNumCircuits(t *testing.T, s *Switch, pending, opened int) {
} }
func assertOutgoingLinkReceive(t *testing.T, targetLink *mockChannelLink, func assertOutgoingLinkReceive(t *testing.T, targetLink *mockChannelLink,
expectReceive bool) { expectReceive bool) *htlcPacket {
// Pull packet from targetLink link. // Pull packet from targetLink link.
select { select {
@ -3181,11 +3190,15 @@ func assertOutgoingLinkReceive(t *testing.T, targetLink *mockChannelLink,
t.Fatalf("unable to complete payment circuit: %v", err) t.Fatalf("unable to complete payment circuit: %v", err)
} }
return packet
case <-time.After(time.Second): case <-time.After(time.Second):
if expectReceive { if expectReceive {
t.Fatal("request was not propagated to destination") t.Fatal("request was not propagated to destination")
} }
} }
return nil
} }
func TestSwitchHoldForward(t *testing.T) { func TestSwitchHoldForward(t *testing.T) {
@ -3247,6 +3260,7 @@ func TestSwitchHoldForward(t *testing.T) {
// bob channel link. // bob channel link.
preimage := [sha256.Size]byte{1} preimage := [sha256.Size]byte{1}
rhash := sha256.Sum256(preimage[:]) rhash := sha256.Sum256(preimage[:])
onionBlob := [1366]byte{4, 5, 6}
ogPacket := &htlcPacket{ ogPacket := &htlcPacket{
incomingChanID: aliceChannelLink.ShortChanID(), incomingChanID: aliceChannelLink.ShortChanID(),
incomingHTLCID: 0, incomingHTLCID: 0,
@ -3255,6 +3269,7 @@ func TestSwitchHoldForward(t *testing.T) {
htlc: &lnwire.UpdateAddHTLC{ htlc: &lnwire.UpdateAddHTLC{
PaymentHash: rhash, PaymentHash: rhash,
Amount: 1, Amount: 1,
OnionBlob: onionBlob,
}, },
} }
@ -3299,13 +3314,55 @@ func TestSwitchHoldForward(t *testing.T) {
assertNumCircuits(t, s, 0, 0) assertNumCircuits(t, s, 0, 0)
assertOutgoingLinkReceive(t, bobChannelLink, false) assertOutgoingLinkReceive(t, bobChannelLink, false)
if err := forwardInterceptor.fail(); err != nil { if err := forwardInterceptor.fail(nil); err != nil {
t.Fatalf("failed to cancel forward %v", err) t.Fatalf("failed to cancel forward %v", err)
} }
assertOutgoingLinkReceive(t, bobChannelLink, false) assertOutgoingLinkReceive(t, bobChannelLink, false)
assertOutgoingLinkReceive(t, aliceChannelLink, true) assertOutgoingLinkReceive(t, aliceChannelLink, true)
assertNumCircuits(t, s, 0, 0) assertNumCircuits(t, s, 0, 0)
// Test failing a hold forward with a failure message.
require.NoError(t,
switchForwardInterceptor.ForwardPackets(linkQuit, ogPacket),
)
assertNumCircuits(t, s, 0, 0)
assertOutgoingLinkReceive(t, bobChannelLink, false)
reason := lnwire.OpaqueReason([]byte{1, 2, 3})
require.NoError(t, forwardInterceptor.fail(reason))
assertOutgoingLinkReceive(t, bobChannelLink, false)
packet := assertOutgoingLinkReceive(t, aliceChannelLink, true)
require.Equal(t, reason, packet.htlc.(*lnwire.UpdateFailHTLC).Reason)
assertNumCircuits(t, s, 0, 0)
// Test failing a hold forward with a malformed htlc failure.
err = switchForwardInterceptor.ForwardPackets(linkQuit, ogPacket)
require.NoError(t, err)
assertNumCircuits(t, s, 0, 0)
assertOutgoingLinkReceive(t, bobChannelLink, false)
code := lnwire.CodeInvalidOnionKey
require.NoError(t, forwardInterceptor.failWithCode(code))
assertOutgoingLinkReceive(t, bobChannelLink, false)
packet = assertOutgoingLinkReceive(t, aliceChannelLink, true)
failPacket := packet.htlc.(*lnwire.UpdateFailHTLC)
shaOnionBlob := sha256.Sum256(onionBlob[:])
expectedFailure := &lnwire.FailInvalidOnionKey{
OnionSHA256: shaOnionBlob,
}
var b bytes.Buffer
require.NoError(t, lnwire.EncodeFailure(&b, expectedFailure, 0))
assert.Equal(t, lnwire.OpaqueReason(b.Bytes()), failPacket.Reason)
assertNumCircuits(t, s, 0, 0)
// Test settling a hold forward // Test settling a hold forward
if err := switchForwardInterceptor.ForwardPackets(linkQuit, ogPacket); err != nil { if err := switchForwardInterceptor.ForwardPackets(linkQuit, ogPacket); err != nil {
t.Fatalf("can't forward htlc packet: %v", err) t.Fatalf("can't forward htlc packet: %v", err)

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@ -2,13 +2,15 @@ package routerrpc
import ( import (
"errors" "errors"
"fmt"
"sync" "sync"
"github.com/lightningnetwork/lnd/channeldb" "github.com/lightningnetwork/lnd/channeldb"
"github.com/lightningnetwork/lnd/htlcswitch" "github.com/lightningnetwork/lnd/htlcswitch"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lntypes" "github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/lnwire" "github.com/lightningnetwork/lnd/lnwire"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
) )
var ( var (
@ -193,8 +195,64 @@ func (r *forwardInterceptor) resolveFromClient(
switch in.Action { switch in.Action {
case ResolveHoldForwardAction_RESUME: case ResolveHoldForwardAction_RESUME:
return interceptedForward.Resume() return interceptedForward.Resume()
case ResolveHoldForwardAction_FAIL: case ResolveHoldForwardAction_FAIL:
return interceptedForward.Fail() // Fail with an encrypted reason.
if in.FailureMessage != nil {
if in.FailureCode != 0 {
return status.Errorf(
codes.InvalidArgument,
"failure message and failure code "+
"are mutually exclusive",
)
}
// Verify that the size is equal to the fixed failure
// message size + hmac + two uint16 lengths. See BOLT
// #4.
if len(in.FailureMessage) !=
lnwire.FailureMessageLength+32+2+2 {
return status.Errorf(
codes.InvalidArgument,
"failure message length invalid",
)
}
return interceptedForward.Fail(in.FailureMessage)
}
var code lnwire.FailCode
switch in.FailureCode {
case lnrpc.Failure_INVALID_ONION_HMAC:
code = lnwire.CodeInvalidOnionHmac
case lnrpc.Failure_INVALID_ONION_KEY:
code = lnwire.CodeInvalidOnionKey
case lnrpc.Failure_INVALID_ONION_VERSION:
code = lnwire.CodeInvalidOnionVersion
// Default to TemporaryChannelFailure.
case 0, lnrpc.Failure_TEMPORARY_CHANNEL_FAILURE:
code = lnwire.CodeTemporaryChannelFailure
default:
return status.Errorf(
codes.InvalidArgument,
"unsupported failure code: %v", in.FailureCode,
)
}
err := interceptedForward.FailWithCode(code)
if err == htlcswitch.ErrUnsupportedFailureCode {
return status.Errorf(
codes.InvalidArgument, err.Error(),
)
}
return err
case ResolveHoldForwardAction_SETTLE: case ResolveHoldForwardAction_SETTLE:
if in.Preimage == nil { if in.Preimage == nil {
return ErrMissingPreimage return ErrMissingPreimage
@ -204,8 +262,12 @@ func (r *forwardInterceptor) resolveFromClient(
return err return err
} }
return interceptedForward.Settle(preimage) return interceptedForward.Settle(preimage)
default: default:
return fmt.Errorf("unrecognized resolve action %v", in.Action) return status.Errorf(
codes.InvalidArgument,
"unrecognized resolve action %v", in.Action,
)
} }
} }

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@ -2690,6 +2690,19 @@ type ForwardHtlcInterceptResponse struct {
Action ResolveHoldForwardAction `protobuf:"varint,2,opt,name=action,proto3,enum=routerrpc.ResolveHoldForwardAction" json:"action,omitempty"` Action ResolveHoldForwardAction `protobuf:"varint,2,opt,name=action,proto3,enum=routerrpc.ResolveHoldForwardAction" json:"action,omitempty"`
// The preimage in case the resolve action is Settle. // The preimage in case the resolve action is Settle.
Preimage []byte `protobuf:"bytes,3,opt,name=preimage,proto3" json:"preimage,omitempty"` Preimage []byte `protobuf:"bytes,3,opt,name=preimage,proto3" json:"preimage,omitempty"`
// Encrypted failure message in case the resolve action is Fail.
//
// If failure_message is specified, the failure_code field must be set
// to zero.
FailureMessage []byte `protobuf:"bytes,4,opt,name=failure_message,json=failureMessage,proto3" json:"failure_message,omitempty"`
// Return the specified failure code in case the resolve action is Fail. The
// message data fields are populated automatically.
//
// If a non-zero failure_code is specified, failure_message must not be set.
//
// For backwards-compatibility reasons, TEMPORARY_CHANNEL_FAILURE is the
// default value for this field.
FailureCode lnrpc.Failure_FailureCode `protobuf:"varint,5,opt,name=failure_code,json=failureCode,proto3,enum=lnrpc.Failure_FailureCode" json:"failure_code,omitempty"`
} }
func (x *ForwardHtlcInterceptResponse) Reset() { func (x *ForwardHtlcInterceptResponse) Reset() {
@ -2745,6 +2758,20 @@ func (x *ForwardHtlcInterceptResponse) GetPreimage() []byte {
return nil return nil
} }
func (x *ForwardHtlcInterceptResponse) GetFailureMessage() []byte {
if x != nil {
return x.FailureMessage
}
return nil
}
func (x *ForwardHtlcInterceptResponse) GetFailureCode() lnrpc.Failure_FailureCode {
if x != nil {
return x.FailureCode
}
return lnrpc.Failure_RESERVED
}
type UpdateChanStatusRequest struct { type UpdateChanStatusRequest struct {
state protoimpl.MessageState state protoimpl.MessageState
sizeCache protoimpl.SizeCache sizeCache protoimpl.SizeCache
@ -3163,7 +3190,7 @@ var file_routerrpc_router_proto_rawDesc = []byte{
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} }
var ( var (
@ -3432,47 +3466,48 @@ var file_routerrpc_router_proto_depIdxs = []int32{
42, // 24: routerrpc.ForwardHtlcInterceptRequest.custom_records:type_name -> routerrpc.ForwardHtlcInterceptRequest.CustomRecordsEntry 42, // 24: routerrpc.ForwardHtlcInterceptRequest.custom_records:type_name -> routerrpc.ForwardHtlcInterceptRequest.CustomRecordsEntry
36, // 25: routerrpc.ForwardHtlcInterceptResponse.incoming_circuit_key:type_name -> routerrpc.CircuitKey 36, // 25: routerrpc.ForwardHtlcInterceptResponse.incoming_circuit_key:type_name -> routerrpc.CircuitKey
2, // 26: routerrpc.ForwardHtlcInterceptResponse.action:type_name -> routerrpc.ResolveHoldForwardAction 2, // 26: routerrpc.ForwardHtlcInterceptResponse.action:type_name -> routerrpc.ResolveHoldForwardAction
49, // 27: routerrpc.UpdateChanStatusRequest.chan_point:type_name -> lnrpc.ChannelPoint 47, // 27: routerrpc.ForwardHtlcInterceptResponse.failure_code:type_name -> lnrpc.Failure.FailureCode
3, // 28: routerrpc.UpdateChanStatusRequest.action:type_name -> routerrpc.ChanStatusAction 49, // 28: routerrpc.UpdateChanStatusRequest.chan_point:type_name -> lnrpc.ChannelPoint
5, // 29: routerrpc.Router.SendPaymentV2:input_type -> routerrpc.SendPaymentRequest 3, // 29: routerrpc.UpdateChanStatusRequest.action:type_name -> routerrpc.ChanStatusAction
6, // 30: routerrpc.Router.TrackPaymentV2:input_type -> routerrpc.TrackPaymentRequest 5, // 30: routerrpc.Router.SendPaymentV2:input_type -> routerrpc.SendPaymentRequest
7, // 31: routerrpc.Router.EstimateRouteFee:input_type -> routerrpc.RouteFeeRequest 6, // 31: routerrpc.Router.TrackPaymentV2:input_type -> routerrpc.TrackPaymentRequest
9, // 32: routerrpc.Router.SendToRoute:input_type -> routerrpc.SendToRouteRequest 7, // 32: routerrpc.Router.EstimateRouteFee:input_type -> routerrpc.RouteFeeRequest
9, // 33: routerrpc.Router.SendToRouteV2:input_type -> routerrpc.SendToRouteRequest 9, // 33: routerrpc.Router.SendToRoute:input_type -> routerrpc.SendToRouteRequest
11, // 34: routerrpc.Router.ResetMissionControl:input_type -> routerrpc.ResetMissionControlRequest 9, // 34: routerrpc.Router.SendToRouteV2:input_type -> routerrpc.SendToRouteRequest
13, // 35: routerrpc.Router.QueryMissionControl:input_type -> routerrpc.QueryMissionControlRequest 11, // 35: routerrpc.Router.ResetMissionControl:input_type -> routerrpc.ResetMissionControlRequest
15, // 36: routerrpc.Router.XImportMissionControl:input_type -> routerrpc.XImportMissionControlRequest 13, // 36: routerrpc.Router.QueryMissionControl:input_type -> routerrpc.QueryMissionControlRequest
19, // 37: routerrpc.Router.GetMissionControlConfig:input_type -> routerrpc.GetMissionControlConfigRequest 15, // 37: routerrpc.Router.XImportMissionControl:input_type -> routerrpc.XImportMissionControlRequest
21, // 38: routerrpc.Router.SetMissionControlConfig:input_type -> routerrpc.SetMissionControlConfigRequest 19, // 38: routerrpc.Router.GetMissionControlConfig:input_type -> routerrpc.GetMissionControlConfigRequest
24, // 39: routerrpc.Router.QueryProbability:input_type -> routerrpc.QueryProbabilityRequest 21, // 39: routerrpc.Router.SetMissionControlConfig:input_type -> routerrpc.SetMissionControlConfigRequest
26, // 40: routerrpc.Router.BuildRoute:input_type -> routerrpc.BuildRouteRequest 24, // 40: routerrpc.Router.QueryProbability:input_type -> routerrpc.QueryProbabilityRequest
28, // 41: routerrpc.Router.SubscribeHtlcEvents:input_type -> routerrpc.SubscribeHtlcEventsRequest 26, // 41: routerrpc.Router.BuildRoute:input_type -> routerrpc.BuildRouteRequest
5, // 42: routerrpc.Router.SendPayment:input_type -> routerrpc.SendPaymentRequest 28, // 42: routerrpc.Router.SubscribeHtlcEvents:input_type -> routerrpc.SubscribeHtlcEventsRequest
6, // 43: routerrpc.Router.TrackPayment:input_type -> routerrpc.TrackPaymentRequest 5, // 43: routerrpc.Router.SendPayment:input_type -> routerrpc.SendPaymentRequest
38, // 44: routerrpc.Router.HtlcInterceptor:input_type -> routerrpc.ForwardHtlcInterceptResponse 6, // 44: routerrpc.Router.TrackPayment:input_type -> routerrpc.TrackPaymentRequest
39, // 45: routerrpc.Router.UpdateChanStatus:input_type -> routerrpc.UpdateChanStatusRequest 38, // 45: routerrpc.Router.HtlcInterceptor:input_type -> routerrpc.ForwardHtlcInterceptResponse
50, // 46: routerrpc.Router.SendPaymentV2:output_type -> lnrpc.Payment 39, // 46: routerrpc.Router.UpdateChanStatus:input_type -> routerrpc.UpdateChanStatusRequest
50, // 47: routerrpc.Router.TrackPaymentV2:output_type -> lnrpc.Payment 50, // 47: routerrpc.Router.SendPaymentV2:output_type -> lnrpc.Payment
8, // 48: routerrpc.Router.EstimateRouteFee:output_type -> routerrpc.RouteFeeResponse 50, // 48: routerrpc.Router.TrackPaymentV2:output_type -> lnrpc.Payment
10, // 49: routerrpc.Router.SendToRoute:output_type -> routerrpc.SendToRouteResponse 8, // 49: routerrpc.Router.EstimateRouteFee:output_type -> routerrpc.RouteFeeResponse
48, // 50: routerrpc.Router.SendToRouteV2:output_type -> lnrpc.HTLCAttempt 10, // 50: routerrpc.Router.SendToRoute:output_type -> routerrpc.SendToRouteResponse
12, // 51: routerrpc.Router.ResetMissionControl:output_type -> routerrpc.ResetMissionControlResponse 48, // 51: routerrpc.Router.SendToRouteV2:output_type -> lnrpc.HTLCAttempt
14, // 52: routerrpc.Router.QueryMissionControl:output_type -> routerrpc.QueryMissionControlResponse 12, // 52: routerrpc.Router.ResetMissionControl:output_type -> routerrpc.ResetMissionControlResponse
16, // 53: routerrpc.Router.XImportMissionControl:output_type -> routerrpc.XImportMissionControlResponse 14, // 53: routerrpc.Router.QueryMissionControl:output_type -> routerrpc.QueryMissionControlResponse
20, // 54: routerrpc.Router.GetMissionControlConfig:output_type -> routerrpc.GetMissionControlConfigResponse 16, // 54: routerrpc.Router.XImportMissionControl:output_type -> routerrpc.XImportMissionControlResponse
22, // 55: routerrpc.Router.SetMissionControlConfig:output_type -> routerrpc.SetMissionControlConfigResponse 20, // 55: routerrpc.Router.GetMissionControlConfig:output_type -> routerrpc.GetMissionControlConfigResponse
25, // 56: routerrpc.Router.QueryProbability:output_type -> routerrpc.QueryProbabilityResponse 22, // 56: routerrpc.Router.SetMissionControlConfig:output_type -> routerrpc.SetMissionControlConfigResponse
27, // 57: routerrpc.Router.BuildRoute:output_type -> routerrpc.BuildRouteResponse 25, // 57: routerrpc.Router.QueryProbability:output_type -> routerrpc.QueryProbabilityResponse
29, // 58: routerrpc.Router.SubscribeHtlcEvents:output_type -> routerrpc.HtlcEvent 27, // 58: routerrpc.Router.BuildRoute:output_type -> routerrpc.BuildRouteResponse
35, // 59: routerrpc.Router.SendPayment:output_type -> routerrpc.PaymentStatus 29, // 59: routerrpc.Router.SubscribeHtlcEvents:output_type -> routerrpc.HtlcEvent
35, // 60: routerrpc.Router.TrackPayment:output_type -> routerrpc.PaymentStatus 35, // 60: routerrpc.Router.SendPayment:output_type -> routerrpc.PaymentStatus
37, // 61: routerrpc.Router.HtlcInterceptor:output_type -> routerrpc.ForwardHtlcInterceptRequest 35, // 61: routerrpc.Router.TrackPayment:output_type -> routerrpc.PaymentStatus
40, // 62: routerrpc.Router.UpdateChanStatus:output_type -> routerrpc.UpdateChanStatusResponse 37, // 62: routerrpc.Router.HtlcInterceptor:output_type -> routerrpc.ForwardHtlcInterceptRequest
46, // [46:63] is the sub-list for method output_type 40, // 63: routerrpc.Router.UpdateChanStatus:output_type -> routerrpc.UpdateChanStatusResponse
29, // [29:46] is the sub-list for method input_type 47, // [47:64] is the sub-list for method output_type
29, // [29:29] is the sub-list for extension type_name 30, // [30:47] is the sub-list for method input_type
29, // [29:29] is the sub-list for extension extendee 30, // [30:30] is the sub-list for extension type_name
0, // [0:29] is the sub-list for field type_name 30, // [30:30] is the sub-list for extension extendee
0, // [0:30] is the sub-list for field type_name
} }
func init() { file_routerrpc_router_proto_init() } func init() { file_routerrpc_router_proto_init() }

View File

@ -781,6 +781,21 @@ message ForwardHtlcInterceptResponse {
// The preimage in case the resolve action is Settle. // The preimage in case the resolve action is Settle.
bytes preimage = 3; bytes preimage = 3;
// Encrypted failure message in case the resolve action is Fail.
//
// If failure_message is specified, the failure_code field must be set
// to zero.
bytes failure_message = 4;
// Return the specified failure code in case the resolve action is Fail. The
// message data fields are populated automatically.
//
// If a non-zero failure_code is specified, failure_message must not be set.
//
// For backwards-compatibility reasons, TEMPORARY_CHANNEL_FAILURE is the
// default value for this field.
lnrpc.Failure.FailureCode failure_code = 5;
} }
enum ResolveHoldForwardAction { enum ResolveHoldForwardAction {

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@ -1201,6 +1201,15 @@
"type": "string", "type": "string",
"format": "byte", "format": "byte",
"description": "The preimage in case the resolve action is Settle." "description": "The preimage in case the resolve action is Settle."
},
"failure_message": {
"type": "string",
"format": "byte",
"description": "Encrypted failure message in case the resolve action is Fail.\n\nIf failure_message is specified, the failure_code field must be set\nto zero."
},
"failure_code": {
"$ref": "#/definitions/FailureFailureCode",
"description": "Return the specified failure code in case the resolve action is Fail. The\nmessage data fields are populated automatically.\n\nIf a non-zero failure_code is specified, failure_message must not be set.\n\nFor backwards-compatibility reasons, TEMPORARY_CHANNEL_FAILURE is the\ndefault value for this field."
} }
}, },
"description": "*\nForwardHtlcInterceptResponse enables the caller to resolve a previously hold\nforward. The caller can choose either to:\n- `Resume`: Execute the default behavior (usually forward).\n- `Reject`: Fail the htlc backwards.\n- `Settle`: Settle this htlc with a given preimage." "description": "*\nForwardHtlcInterceptResponse enables the caller to resolve a previously hold\nforward. The caller can choose either to:\n- `Resume`: Execute the default behavior (usually forward).\n- `Reject`: Fail the htlc backwards.\n- `Settle`: Settle this htlc with a given preimage."