diff --git a/lnrpc/routerrpc/router.pb.go b/lnrpc/routerrpc/router.pb.go
index 5951e4e9..ea4f940f 100644
--- a/lnrpc/routerrpc/router.pb.go
+++ b/lnrpc/routerrpc/router.pb.go
@@ -79,6 +79,125 @@ func (PaymentState) EnumDescriptor() ([]byte, []int) {
 	return fileDescriptor_7a0613f69d37b0a5, []int{0}
 }
 
+type FailureDetail int32
+
+const (
+	FailureDetail_UNKNOWN                 FailureDetail = 0
+	FailureDetail_NO_DETAIL               FailureDetail = 1
+	FailureDetail_ONION_DECODE            FailureDetail = 2
+	FailureDetail_LINK_NOT_ELIGIBLE       FailureDetail = 3
+	FailureDetail_ON_CHAIN_TIMEOUT        FailureDetail = 4
+	FailureDetail_HTLC_EXCEEDS_MAX        FailureDetail = 5
+	FailureDetail_INSUFFICIENT_BALANCE    FailureDetail = 6
+	FailureDetail_INCOMPLETE_FORWARD      FailureDetail = 7
+	FailureDetail_HTLC_ADD_FAILED         FailureDetail = 8
+	FailureDetail_FORWARDS_DISABLED       FailureDetail = 9
+	FailureDetail_INVOICE_CANCELED        FailureDetail = 10
+	FailureDetail_INVOICE_UNDERPAID       FailureDetail = 11
+	FailureDetail_INVOICE_EXPIRY_TOO_SOON FailureDetail = 12
+	FailureDetail_INVOICE_NOT_OPEN        FailureDetail = 13
+	FailureDetail_MPP_INVOICE_TIMEOUT     FailureDetail = 14
+	FailureDetail_ADDRESS_MISMATCH        FailureDetail = 15
+	FailureDetail_SET_TOTAL_MISMATCH      FailureDetail = 16
+	FailureDetail_SET_TOTAL_TOO_LOW       FailureDetail = 17
+	FailureDetail_SET_OVERPAID            FailureDetail = 18
+	FailureDetail_UNKNOWN_INVOICE         FailureDetail = 19
+	FailureDetail_INVALID_KEYSEND         FailureDetail = 20
+	FailureDetail_MPP_IN_PROGRESS         FailureDetail = 21
+	FailureDetail_CIRCULAR_ROUTE          FailureDetail = 22
+)
+
+var FailureDetail_name = map[int32]string{
+	0:  "UNKNOWN",
+	1:  "NO_DETAIL",
+	2:  "ONION_DECODE",
+	3:  "LINK_NOT_ELIGIBLE",
+	4:  "ON_CHAIN_TIMEOUT",
+	5:  "HTLC_EXCEEDS_MAX",
+	6:  "INSUFFICIENT_BALANCE",
+	7:  "INCOMPLETE_FORWARD",
+	8:  "HTLC_ADD_FAILED",
+	9:  "FORWARDS_DISABLED",
+	10: "INVOICE_CANCELED",
+	11: "INVOICE_UNDERPAID",
+	12: "INVOICE_EXPIRY_TOO_SOON",
+	13: "INVOICE_NOT_OPEN",
+	14: "MPP_INVOICE_TIMEOUT",
+	15: "ADDRESS_MISMATCH",
+	16: "SET_TOTAL_MISMATCH",
+	17: "SET_TOTAL_TOO_LOW",
+	18: "SET_OVERPAID",
+	19: "UNKNOWN_INVOICE",
+	20: "INVALID_KEYSEND",
+	21: "MPP_IN_PROGRESS",
+	22: "CIRCULAR_ROUTE",
+}
+
+var FailureDetail_value = map[string]int32{
+	"UNKNOWN":                 0,
+	"NO_DETAIL":               1,
+	"ONION_DECODE":            2,
+	"LINK_NOT_ELIGIBLE":       3,
+	"ON_CHAIN_TIMEOUT":        4,
+	"HTLC_EXCEEDS_MAX":        5,
+	"INSUFFICIENT_BALANCE":    6,
+	"INCOMPLETE_FORWARD":      7,
+	"HTLC_ADD_FAILED":         8,
+	"FORWARDS_DISABLED":       9,
+	"INVOICE_CANCELED":        10,
+	"INVOICE_UNDERPAID":       11,
+	"INVOICE_EXPIRY_TOO_SOON": 12,
+	"INVOICE_NOT_OPEN":        13,
+	"MPP_INVOICE_TIMEOUT":     14,
+	"ADDRESS_MISMATCH":        15,
+	"SET_TOTAL_MISMATCH":      16,
+	"SET_TOTAL_TOO_LOW":       17,
+	"SET_OVERPAID":            18,
+	"UNKNOWN_INVOICE":         19,
+	"INVALID_KEYSEND":         20,
+	"MPP_IN_PROGRESS":         21,
+	"CIRCULAR_ROUTE":          22,
+}
+
+func (x FailureDetail) String() string {
+	return proto.EnumName(FailureDetail_name, int32(x))
+}
+
+func (FailureDetail) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{1}
+}
+
+type HtlcEvent_EventType int32
+
+const (
+	HtlcEvent_UNKNOWN HtlcEvent_EventType = 0
+	HtlcEvent_SEND    HtlcEvent_EventType = 1
+	HtlcEvent_RECEIVE HtlcEvent_EventType = 2
+	HtlcEvent_FORWARD HtlcEvent_EventType = 3
+)
+
+var HtlcEvent_EventType_name = map[int32]string{
+	0: "UNKNOWN",
+	1: "SEND",
+	2: "RECEIVE",
+	3: "FORWARD",
+}
+
+var HtlcEvent_EventType_value = map[string]int32{
+	"UNKNOWN": 0,
+	"SEND":    1,
+	"RECEIVE": 2,
+	"FORWARD": 3,
+}
+
+func (x HtlcEvent_EventType) String() string {
+	return proto.EnumName(HtlcEvent_EventType_name, int32(x))
+}
+
+func (HtlcEvent_EventType) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{18, 0}
+}
+
 type SendPaymentRequest struct {
 	/// The identity pubkey of the payment recipient
 	Dest []byte `protobuf:"bytes,1,opt,name=dest,proto3" json:"dest,omitempty"`
@@ -1118,8 +1237,462 @@ func (m *BuildRouteResponse) GetRoute() *lnrpc.Route {
 	return nil
 }
 
+type SubscribeHtlcEventsRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SubscribeHtlcEventsRequest) Reset()         { *m = SubscribeHtlcEventsRequest{} }
+func (m *SubscribeHtlcEventsRequest) String() string { return proto.CompactTextString(m) }
+func (*SubscribeHtlcEventsRequest) ProtoMessage()    {}
+func (*SubscribeHtlcEventsRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{17}
+}
+
+func (m *SubscribeHtlcEventsRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SubscribeHtlcEventsRequest.Unmarshal(m, b)
+}
+func (m *SubscribeHtlcEventsRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SubscribeHtlcEventsRequest.Marshal(b, m, deterministic)
+}
+func (m *SubscribeHtlcEventsRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SubscribeHtlcEventsRequest.Merge(m, src)
+}
+func (m *SubscribeHtlcEventsRequest) XXX_Size() int {
+	return xxx_messageInfo_SubscribeHtlcEventsRequest.Size(m)
+}
+func (m *SubscribeHtlcEventsRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_SubscribeHtlcEventsRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SubscribeHtlcEventsRequest proto.InternalMessageInfo
+
+//*
+//HtlcEvent contains the htlc event that was processed. These are served on a
+//best-effort basis; events are not persisted, delivery is not guaranteed
+//(in the event of a crash in the switch, forward events may be lost) and
+//some events may be replayed upon restart. Events consumed from this package
+//should be de-duplicated by the htlc's unique combination of incoming and
+//outgoing channel id and htlc id. [EXPERIMENTAL]
+type HtlcEvent struct {
+	//*
+	//The short channel id that the incoming htlc arrived at our node on. This
+	//value is zero for sends.
+	IncomingChannelId uint64 `protobuf:"varint,1,opt,name=incoming_channel_id,json=incomingChannelId,proto3" json:"incoming_channel_id,omitempty"`
+	//*
+	//The short channel id that the outgoing htlc left our node on. This value
+	//is zero for receives.
+	OutgoingChannelId uint64 `protobuf:"varint,2,opt,name=outgoing_channel_id,json=outgoingChannelId,proto3" json:"outgoing_channel_id,omitempty"`
+	//*
+	//Incoming id is the index of the incoming htlc in the incoming channel.
+	//This value is zero for sends.
+	IncomingHtlcId uint64 `protobuf:"varint,3,opt,name=incoming_htlc_id,json=incomingHtlcId,proto3" json:"incoming_htlc_id,omitempty"`
+	//*
+	//Outgoing id is the index of the outgoing htlc in the outgoing channel.
+	//This value is zero for receives.
+	OutgoingHtlcId uint64 `protobuf:"varint,4,opt,name=outgoing_htlc_id,json=outgoingHtlcId,proto3" json:"outgoing_htlc_id,omitempty"`
+	//*
+	//The time in unix nanoseconds that the event occurred.
+	TimestampNs uint64 `protobuf:"varint,5,opt,name=timestamp_ns,json=timestampNs,proto3" json:"timestamp_ns,omitempty"`
+	//*
+	//The event type indicates whether the htlc was part of a send, receive or
+	//forward.
+	EventType HtlcEvent_EventType `protobuf:"varint,6,opt,name=event_type,json=eventType,proto3,enum=routerrpc.HtlcEvent_EventType" json:"event_type,omitempty"`
+	// Types that are valid to be assigned to Event:
+	//	*HtlcEvent_ForwardEvent
+	//	*HtlcEvent_ForwardFailEvent
+	//	*HtlcEvent_SettleEvent
+	//	*HtlcEvent_LinkFailEvent
+	Event                isHtlcEvent_Event `protobuf_oneof:"event"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
+}
+
+func (m *HtlcEvent) Reset()         { *m = HtlcEvent{} }
+func (m *HtlcEvent) String() string { return proto.CompactTextString(m) }
+func (*HtlcEvent) ProtoMessage()    {}
+func (*HtlcEvent) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{18}
+}
+
+func (m *HtlcEvent) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HtlcEvent.Unmarshal(m, b)
+}
+func (m *HtlcEvent) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HtlcEvent.Marshal(b, m, deterministic)
+}
+func (m *HtlcEvent) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HtlcEvent.Merge(m, src)
+}
+func (m *HtlcEvent) XXX_Size() int {
+	return xxx_messageInfo_HtlcEvent.Size(m)
+}
+func (m *HtlcEvent) XXX_DiscardUnknown() {
+	xxx_messageInfo_HtlcEvent.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HtlcEvent proto.InternalMessageInfo
+
+func (m *HtlcEvent) GetIncomingChannelId() uint64 {
+	if m != nil {
+		return m.IncomingChannelId
+	}
+	return 0
+}
+
+func (m *HtlcEvent) GetOutgoingChannelId() uint64 {
+	if m != nil {
+		return m.OutgoingChannelId
+	}
+	return 0
+}
+
+func (m *HtlcEvent) GetIncomingHtlcId() uint64 {
+	if m != nil {
+		return m.IncomingHtlcId
+	}
+	return 0
+}
+
+func (m *HtlcEvent) GetOutgoingHtlcId() uint64 {
+	if m != nil {
+		return m.OutgoingHtlcId
+	}
+	return 0
+}
+
+func (m *HtlcEvent) GetTimestampNs() uint64 {
+	if m != nil {
+		return m.TimestampNs
+	}
+	return 0
+}
+
+func (m *HtlcEvent) GetEventType() HtlcEvent_EventType {
+	if m != nil {
+		return m.EventType
+	}
+	return HtlcEvent_UNKNOWN
+}
+
+type isHtlcEvent_Event interface {
+	isHtlcEvent_Event()
+}
+
+type HtlcEvent_ForwardEvent struct {
+	ForwardEvent *ForwardEvent `protobuf:"bytes,7,opt,name=forward_event,json=forwardEvent,proto3,oneof"`
+}
+
+type HtlcEvent_ForwardFailEvent struct {
+	ForwardFailEvent *ForwardFailEvent `protobuf:"bytes,8,opt,name=forward_fail_event,json=forwardFailEvent,proto3,oneof"`
+}
+
+type HtlcEvent_SettleEvent struct {
+	SettleEvent *SettleEvent `protobuf:"bytes,9,opt,name=settle_event,json=settleEvent,proto3,oneof"`
+}
+
+type HtlcEvent_LinkFailEvent struct {
+	LinkFailEvent *LinkFailEvent `protobuf:"bytes,10,opt,name=link_fail_event,json=linkFailEvent,proto3,oneof"`
+}
+
+func (*HtlcEvent_ForwardEvent) isHtlcEvent_Event() {}
+
+func (*HtlcEvent_ForwardFailEvent) isHtlcEvent_Event() {}
+
+func (*HtlcEvent_SettleEvent) isHtlcEvent_Event() {}
+
+func (*HtlcEvent_LinkFailEvent) isHtlcEvent_Event() {}
+
+func (m *HtlcEvent) GetEvent() isHtlcEvent_Event {
+	if m != nil {
+		return m.Event
+	}
+	return nil
+}
+
+func (m *HtlcEvent) GetForwardEvent() *ForwardEvent {
+	if x, ok := m.GetEvent().(*HtlcEvent_ForwardEvent); ok {
+		return x.ForwardEvent
+	}
+	return nil
+}
+
+func (m *HtlcEvent) GetForwardFailEvent() *ForwardFailEvent {
+	if x, ok := m.GetEvent().(*HtlcEvent_ForwardFailEvent); ok {
+		return x.ForwardFailEvent
+	}
+	return nil
+}
+
+func (m *HtlcEvent) GetSettleEvent() *SettleEvent {
+	if x, ok := m.GetEvent().(*HtlcEvent_SettleEvent); ok {
+		return x.SettleEvent
+	}
+	return nil
+}
+
+func (m *HtlcEvent) GetLinkFailEvent() *LinkFailEvent {
+	if x, ok := m.GetEvent().(*HtlcEvent_LinkFailEvent); ok {
+		return x.LinkFailEvent
+	}
+	return nil
+}
+
+// XXX_OneofWrappers is for the internal use of the proto package.
+func (*HtlcEvent) XXX_OneofWrappers() []interface{} {
+	return []interface{}{
+		(*HtlcEvent_ForwardEvent)(nil),
+		(*HtlcEvent_ForwardFailEvent)(nil),
+		(*HtlcEvent_SettleEvent)(nil),
+		(*HtlcEvent_LinkFailEvent)(nil),
+	}
+}
+
+type HtlcInfo struct {
+	// The timelock on the incoming htlc.
+	IncomingTimelock uint32 `protobuf:"varint,1,opt,name=incoming_timelock,json=incomingTimelock,proto3" json:"incoming_timelock,omitempty"`
+	// The timelock on the outgoing htlc.
+	OutgoingTimelock uint32 `protobuf:"varint,2,opt,name=outgoing_timelock,json=outgoingTimelock,proto3" json:"outgoing_timelock,omitempty"`
+	// The amount of the incoming htlc.
+	IncomingAmtMsat uint64 `protobuf:"varint,3,opt,name=incoming_amt_msat,json=incomingAmtMsat,proto3" json:"incoming_amt_msat,omitempty"`
+	// The amount of the outgoing htlc.
+	OutgoingAmtMsat      uint64   `protobuf:"varint,4,opt,name=outgoing_amt_msat,json=outgoingAmtMsat,proto3" json:"outgoing_amt_msat,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *HtlcInfo) Reset()         { *m = HtlcInfo{} }
+func (m *HtlcInfo) String() string { return proto.CompactTextString(m) }
+func (*HtlcInfo) ProtoMessage()    {}
+func (*HtlcInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{19}
+}
+
+func (m *HtlcInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HtlcInfo.Unmarshal(m, b)
+}
+func (m *HtlcInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HtlcInfo.Marshal(b, m, deterministic)
+}
+func (m *HtlcInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HtlcInfo.Merge(m, src)
+}
+func (m *HtlcInfo) XXX_Size() int {
+	return xxx_messageInfo_HtlcInfo.Size(m)
+}
+func (m *HtlcInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_HtlcInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HtlcInfo proto.InternalMessageInfo
+
+func (m *HtlcInfo) GetIncomingTimelock() uint32 {
+	if m != nil {
+		return m.IncomingTimelock
+	}
+	return 0
+}
+
+func (m *HtlcInfo) GetOutgoingTimelock() uint32 {
+	if m != nil {
+		return m.OutgoingTimelock
+	}
+	return 0
+}
+
+func (m *HtlcInfo) GetIncomingAmtMsat() uint64 {
+	if m != nil {
+		return m.IncomingAmtMsat
+	}
+	return 0
+}
+
+func (m *HtlcInfo) GetOutgoingAmtMsat() uint64 {
+	if m != nil {
+		return m.OutgoingAmtMsat
+	}
+	return 0
+}
+
+type ForwardEvent struct {
+	// Info contains details about the htlc that was forwarded.
+	Info                 *HtlcInfo `protobuf:"bytes,1,opt,name=info,proto3" json:"info,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
+	XXX_unrecognized     []byte    `json:"-"`
+	XXX_sizecache        int32     `json:"-"`
+}
+
+func (m *ForwardEvent) Reset()         { *m = ForwardEvent{} }
+func (m *ForwardEvent) String() string { return proto.CompactTextString(m) }
+func (*ForwardEvent) ProtoMessage()    {}
+func (*ForwardEvent) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{20}
+}
+
+func (m *ForwardEvent) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ForwardEvent.Unmarshal(m, b)
+}
+func (m *ForwardEvent) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ForwardEvent.Marshal(b, m, deterministic)
+}
+func (m *ForwardEvent) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ForwardEvent.Merge(m, src)
+}
+func (m *ForwardEvent) XXX_Size() int {
+	return xxx_messageInfo_ForwardEvent.Size(m)
+}
+func (m *ForwardEvent) XXX_DiscardUnknown() {
+	xxx_messageInfo_ForwardEvent.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ForwardEvent proto.InternalMessageInfo
+
+func (m *ForwardEvent) GetInfo() *HtlcInfo {
+	if m != nil {
+		return m.Info
+	}
+	return nil
+}
+
+type ForwardFailEvent struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ForwardFailEvent) Reset()         { *m = ForwardFailEvent{} }
+func (m *ForwardFailEvent) String() string { return proto.CompactTextString(m) }
+func (*ForwardFailEvent) ProtoMessage()    {}
+func (*ForwardFailEvent) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{21}
+}
+
+func (m *ForwardFailEvent) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ForwardFailEvent.Unmarshal(m, b)
+}
+func (m *ForwardFailEvent) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ForwardFailEvent.Marshal(b, m, deterministic)
+}
+func (m *ForwardFailEvent) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ForwardFailEvent.Merge(m, src)
+}
+func (m *ForwardFailEvent) XXX_Size() int {
+	return xxx_messageInfo_ForwardFailEvent.Size(m)
+}
+func (m *ForwardFailEvent) XXX_DiscardUnknown() {
+	xxx_messageInfo_ForwardFailEvent.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ForwardFailEvent proto.InternalMessageInfo
+
+type SettleEvent struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SettleEvent) Reset()         { *m = SettleEvent{} }
+func (m *SettleEvent) String() string { return proto.CompactTextString(m) }
+func (*SettleEvent) ProtoMessage()    {}
+func (*SettleEvent) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{22}
+}
+
+func (m *SettleEvent) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SettleEvent.Unmarshal(m, b)
+}
+func (m *SettleEvent) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SettleEvent.Marshal(b, m, deterministic)
+}
+func (m *SettleEvent) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SettleEvent.Merge(m, src)
+}
+func (m *SettleEvent) XXX_Size() int {
+	return xxx_messageInfo_SettleEvent.Size(m)
+}
+func (m *SettleEvent) XXX_DiscardUnknown() {
+	xxx_messageInfo_SettleEvent.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SettleEvent proto.InternalMessageInfo
+
+type LinkFailEvent struct {
+	// Info contains details about the htlc that we failed.
+	Info *HtlcInfo `protobuf:"bytes,1,opt,name=info,proto3" json:"info,omitempty"`
+	// FailureCode is the BOLT error code for the failure.
+	WireFailure lnrpc.Failure_FailureCode `protobuf:"varint,2,opt,name=wire_failure,json=wireFailure,proto3,enum=lnrpc.Failure_FailureCode" json:"wire_failure,omitempty"`
+	//*
+	//FailureDetail provides additional information about the reason for the
+	//failure. This detail enriches the information provided by the wire message
+	//and may be 'no detail' if the wire message requires no additional metadata.
+	FailureDetail FailureDetail `protobuf:"varint,3,opt,name=failure_detail,json=failureDetail,proto3,enum=routerrpc.FailureDetail" json:"failure_detail,omitempty"`
+	// A string representation of the link failure.
+	FailureString        string   `protobuf:"bytes,4,opt,name=failure_string,json=failureString,proto3" json:"failure_string,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *LinkFailEvent) Reset()         { *m = LinkFailEvent{} }
+func (m *LinkFailEvent) String() string { return proto.CompactTextString(m) }
+func (*LinkFailEvent) ProtoMessage()    {}
+func (*LinkFailEvent) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7a0613f69d37b0a5, []int{23}
+}
+
+func (m *LinkFailEvent) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LinkFailEvent.Unmarshal(m, b)
+}
+func (m *LinkFailEvent) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LinkFailEvent.Marshal(b, m, deterministic)
+}
+func (m *LinkFailEvent) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LinkFailEvent.Merge(m, src)
+}
+func (m *LinkFailEvent) XXX_Size() int {
+	return xxx_messageInfo_LinkFailEvent.Size(m)
+}
+func (m *LinkFailEvent) XXX_DiscardUnknown() {
+	xxx_messageInfo_LinkFailEvent.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LinkFailEvent proto.InternalMessageInfo
+
+func (m *LinkFailEvent) GetInfo() *HtlcInfo {
+	if m != nil {
+		return m.Info
+	}
+	return nil
+}
+
+func (m *LinkFailEvent) GetWireFailure() lnrpc.Failure_FailureCode {
+	if m != nil {
+		return m.WireFailure
+	}
+	return lnrpc.Failure_RESERVED
+}
+
+func (m *LinkFailEvent) GetFailureDetail() FailureDetail {
+	if m != nil {
+		return m.FailureDetail
+	}
+	return FailureDetail_UNKNOWN
+}
+
+func (m *LinkFailEvent) GetFailureString() string {
+	if m != nil {
+		return m.FailureString
+	}
+	return ""
+}
+
 func init() {
 	proto.RegisterEnum("routerrpc.PaymentState", PaymentState_name, PaymentState_value)
+	proto.RegisterEnum("routerrpc.FailureDetail", FailureDetail_name, FailureDetail_value)
+	proto.RegisterEnum("routerrpc.HtlcEvent_EventType", HtlcEvent_EventType_name, HtlcEvent_EventType_value)
 	proto.RegisterType((*SendPaymentRequest)(nil), "routerrpc.SendPaymentRequest")
 	proto.RegisterMapType((map[uint64][]byte)(nil), "routerrpc.SendPaymentRequest.DestCustomRecordsEntry")
 	proto.RegisterType((*TrackPaymentRequest)(nil), "routerrpc.TrackPaymentRequest")
@@ -1138,100 +1711,154 @@ func init() {
 	proto.RegisterType((*QueryProbabilityResponse)(nil), "routerrpc.QueryProbabilityResponse")
 	proto.RegisterType((*BuildRouteRequest)(nil), "routerrpc.BuildRouteRequest")
 	proto.RegisterType((*BuildRouteResponse)(nil), "routerrpc.BuildRouteResponse")
+	proto.RegisterType((*SubscribeHtlcEventsRequest)(nil), "routerrpc.SubscribeHtlcEventsRequest")
+	proto.RegisterType((*HtlcEvent)(nil), "routerrpc.HtlcEvent")
+	proto.RegisterType((*HtlcInfo)(nil), "routerrpc.HtlcInfo")
+	proto.RegisterType((*ForwardEvent)(nil), "routerrpc.ForwardEvent")
+	proto.RegisterType((*ForwardFailEvent)(nil), "routerrpc.ForwardFailEvent")
+	proto.RegisterType((*SettleEvent)(nil), "routerrpc.SettleEvent")
+	proto.RegisterType((*LinkFailEvent)(nil), "routerrpc.LinkFailEvent")
 }
 
 func init() { proto.RegisterFile("routerrpc/router.proto", fileDescriptor_7a0613f69d37b0a5) }
 
 var fileDescriptor_7a0613f69d37b0a5 = []byte{
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+	0x72, 0x60, 0x77, 0xcd, 0xc5, 0x6f, 0x29, 0x1a, 0x77, 0x5f, 0x0c, 0xeb, 0xf7, 0xd7, 0xdd, 0x8f,
+	0x9e, 0x2b, 0x27, 0xdf, 0xfe, 0xf1, 0xe8, 0xca, 0x63, 0xe3, 0xd9, 0xe5, 0xe1, 0x20, 0x9c, 0x1c,
+	0xf9, 0xde, 0xd5, 0x98, 0x05, 0x5e, 0x70, 0x15, 0x50, 0xf6, 0x31, 0x8c, 0xae, 0x8f, 0xfc, 0x60,
+	0x78, 0x24, 0x86, 0xcd, 0xd1, 0x7c, 0xf9, 0xe5, 0xa6, 0xf8, 0x5b, 0xdd, 0x2f, 0xff, 0x1f, 0x00,
+	0x00, 0xff, 0xff, 0xe9, 0x0c, 0xc3, 0x27, 0xdb, 0x13, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1281,6 +1908,10 @@ type RouterClient interface {
 	//keys. It retrieves the relevant channel policies from the graph in order to
 	//calculate the correct fees and time locks.
 	BuildRoute(ctx context.Context, in *BuildRouteRequest, opts ...grpc.CallOption) (*BuildRouteResponse, error)
+	//*
+	//SubscribeHtlcEvents creates a uni-directional stream from the server to
+	//the client which delivers a stream of htlc events.
+	SubscribeHtlcEvents(ctx context.Context, in *SubscribeHtlcEventsRequest, opts ...grpc.CallOption) (Router_SubscribeHtlcEventsClient, error)
 }
 
 type routerClient struct {
@@ -1409,6 +2040,38 @@ func (c *routerClient) BuildRoute(ctx context.Context, in *BuildRouteRequest, op
 	return out, nil
 }
 
+func (c *routerClient) SubscribeHtlcEvents(ctx context.Context, in *SubscribeHtlcEventsRequest, opts ...grpc.CallOption) (Router_SubscribeHtlcEventsClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_Router_serviceDesc.Streams[2], "/routerrpc.Router/SubscribeHtlcEvents", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &routerSubscribeHtlcEventsClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type Router_SubscribeHtlcEventsClient interface {
+	Recv() (*HtlcEvent, error)
+	grpc.ClientStream
+}
+
+type routerSubscribeHtlcEventsClient struct {
+	grpc.ClientStream
+}
+
+func (x *routerSubscribeHtlcEventsClient) Recv() (*HtlcEvent, error) {
+	m := new(HtlcEvent)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
 // RouterServer is the server API for Router service.
 type RouterServer interface {
 	//*
@@ -1446,6 +2109,10 @@ type RouterServer interface {
 	//keys. It retrieves the relevant channel policies from the graph in order to
 	//calculate the correct fees and time locks.
 	BuildRoute(context.Context, *BuildRouteRequest) (*BuildRouteResponse, error)
+	//*
+	//SubscribeHtlcEvents creates a uni-directional stream from the server to
+	//the client which delivers a stream of htlc events.
+	SubscribeHtlcEvents(*SubscribeHtlcEventsRequest, Router_SubscribeHtlcEventsServer) error
 }
 
 func RegisterRouterServer(s *grpc.Server, srv RouterServer) {
@@ -1602,6 +2269,27 @@ func _Router_BuildRoute_Handler(srv interface{}, ctx context.Context, dec func(i
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Router_SubscribeHtlcEvents_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(SubscribeHtlcEventsRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(RouterServer).SubscribeHtlcEvents(m, &routerSubscribeHtlcEventsServer{stream})
+}
+
+type Router_SubscribeHtlcEventsServer interface {
+	Send(*HtlcEvent) error
+	grpc.ServerStream
+}
+
+type routerSubscribeHtlcEventsServer struct {
+	grpc.ServerStream
+}
+
+func (x *routerSubscribeHtlcEventsServer) Send(m *HtlcEvent) error {
+	return x.ServerStream.SendMsg(m)
+}
+
 var _Router_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "routerrpc.Router",
 	HandlerType: (*RouterServer)(nil),
@@ -1642,6 +2330,11 @@ var _Router_serviceDesc = grpc.ServiceDesc{
 			Handler:       _Router_TrackPayment_Handler,
 			ServerStreams: true,
 		},
+		{
+			StreamName:    "SubscribeHtlcEvents",
+			Handler:       _Router_SubscribeHtlcEvents_Handler,
+			ServerStreams: true,
+		},
 	},
 	Metadata: "routerrpc/router.proto",
 }
diff --git a/lnrpc/routerrpc/router.proto b/lnrpc/routerrpc/router.proto
index d5e53ff9..027b6c51 100644
--- a/lnrpc/routerrpc/router.proto
+++ b/lnrpc/routerrpc/router.proto
@@ -333,6 +333,135 @@ message BuildRouteResponse {
     lnrpc.Route route = 1;
 }
 
+
+message SubscribeHtlcEventsRequest{}
+
+/**
+HtlcEvent contains the htlc event that was processed. These are served on a
+best-effort basis; events are not persisted, delivery is not guaranteed
+(in the event of a crash in the switch, forward events may be lost) and
+some events may be replayed upon restart. Events consumed from this package
+should be de-duplicated by the htlc's unique combination of incoming and
+outgoing channel id and htlc id. [EXPERIMENTAL]
+*/
+message HtlcEvent{
+    /**
+    The short channel id that the incoming htlc arrived at our node on. This
+    value is zero for sends.
+    */
+    uint64 incoming_channel_id = 1;
+
+    /**
+    The short channel id that the outgoing htlc left our node on. This value
+    is zero for receives.
+    */
+    uint64 outgoing_channel_id = 2;
+
+    /**
+    Incoming id is the index of the incoming htlc in the incoming channel.
+    This value is zero for sends.
+    */
+    uint64 incoming_htlc_id = 3;
+
+    /**
+    Outgoing id is the index of the outgoing htlc in the outgoing channel.
+    This value is zero for receives.
+    */
+    uint64 outgoing_htlc_id = 4;
+
+    /**
+    The time in unix nanoseconds that the event occurred.
+    */
+    uint64 timestamp_ns = 5;
+
+    enum EventType{
+        UNKNOWN = 0;
+        SEND = 1;
+        RECEIVE = 2;
+        FORWARD = 3;
+    }
+
+    /**
+    The event type indicates whether the htlc was part of a send, receive or
+    forward.
+    */
+    EventType event_type = 6;
+
+    oneof event {
+        ForwardEvent forward_event = 7;
+        ForwardFailEvent forward_fail_event = 8;
+        SettleEvent settle_event = 9;
+        LinkFailEvent link_fail_event = 10;
+    }
+}
+
+message HtlcInfo{
+    // The timelock on the incoming htlc.
+    uint32 incoming_timelock = 1;
+
+    // The timelock on the outgoing htlc.
+    uint32 outgoing_timelock = 2;
+
+    // The amount of the incoming htlc.
+    uint64 incoming_amt_msat = 3;
+
+    // The amount of the outgoing htlc.
+    uint64 outgoing_amt_msat = 4;
+}
+
+message ForwardEvent{
+    // Info contains details about the htlc that was forwarded.
+    HtlcInfo info = 1;
+}
+
+message ForwardFailEvent{}
+
+message SettleEvent{}
+
+message LinkFailEvent{
+    // Info contains details about the htlc that we failed.
+    HtlcInfo info = 1;
+
+    // FailureCode is the BOLT error code for the failure.
+    lnrpc.Failure.FailureCode wire_failure = 2;
+
+    /**
+    FailureDetail provides additional information about the reason for the
+    failure. This detail enriches the information provided by the wire message
+    and may be 'no detail' if the wire message requires no additional metadata.
+    */
+    FailureDetail failure_detail = 3;
+
+    // A string representation of the link failure.
+    string failure_string = 4;
+}
+
+enum FailureDetail {
+    UNKNOWN = 0;
+    NO_DETAIL = 1;
+    ONION_DECODE = 2;
+    LINK_NOT_ELIGIBLE = 3;
+    ON_CHAIN_TIMEOUT = 4;
+    HTLC_EXCEEDS_MAX = 5;
+    INSUFFICIENT_BALANCE =6;
+    INCOMPLETE_FORWARD = 7;
+    HTLC_ADD_FAILED = 8;
+    FORWARDS_DISABLED = 9;
+    INVOICE_CANCELED = 10;
+    INVOICE_UNDERPAID = 11;
+    INVOICE_EXPIRY_TOO_SOON = 12;
+    INVOICE_NOT_OPEN = 13;
+    MPP_INVOICE_TIMEOUT = 14;
+    ADDRESS_MISMATCH = 15;
+    SET_TOTAL_MISMATCH = 16;
+    SET_TOTAL_TOO_LOW = 17;
+    SET_OVERPAID = 18;
+    UNKNOWN_INVOICE = 19;
+    INVALID_KEYSEND = 20;
+    MPP_IN_PROGRESS = 21;
+    CIRCULAR_ROUTE = 22;
+}
+
 service Router {
     /**
     SendPayment attempts to route a payment described by the passed
@@ -387,4 +516,10 @@ service Router {
     calculate the correct fees and time locks.
     */
     rpc BuildRoute (BuildRouteRequest) returns (BuildRouteResponse);
+
+    /**
+    SubscribeHtlcEvents creates a uni-directional stream from the server to
+    the client which delivers a stream of htlc events.
+    */
+    rpc SubscribeHtlcEvents (SubscribeHtlcEventsRequest) returns (stream HtlcEvent);
 }
diff --git a/lnrpc/routerrpc/router_server.go b/lnrpc/routerrpc/router_server.go
index 8bbdb387..17434699 100644
--- a/lnrpc/routerrpc/router_server.go
+++ b/lnrpc/routerrpc/router_server.go
@@ -82,6 +82,10 @@ var (
 			Entity: "offchain",
 			Action: "read",
 		}},
+		"/routerrpc.Router/SubscribeHtlcEvents": {{
+			Entity: "offchain",
+			Action: "read",
+		}},
 	}
 
 	// DefaultRouterMacFilename is the default name of the router macaroon
@@ -613,3 +617,42 @@ func (s *Server) BuildRoute(ctx context.Context,
 
 	return routeResp, nil
 }
+
+// SubscribeHtlcEvents creates a uni-directional stream from the server to
+// the client which delivers a stream of htlc events.
+func (s *Server) SubscribeHtlcEvents(req *SubscribeHtlcEventsRequest,
+	stream Router_SubscribeHtlcEventsServer) error {
+
+	htlcClient, err := s.cfg.RouterBackend.SubscribeHtlcEvents()
+	if err != nil {
+		return err
+	}
+	defer htlcClient.Cancel()
+
+	for {
+		select {
+		case event := <-htlcClient.Updates():
+			rpcEvent, err := rpcHtlcEvent(event)
+			if err != nil {
+				return err
+			}
+
+			if err := stream.Send(rpcEvent); err != nil {
+				return err
+			}
+
+		// If the stream's context is cancelled, return an error.
+		case <-stream.Context().Done():
+			log.Debugf("htlc event stream cancelled")
+			return stream.Context().Err()
+
+		// If the subscribe client terminates, exit with an error.
+		case <-htlcClient.Quit():
+			return errors.New("htlc event subscription terminated")
+
+		// If the server has been signalled to shut down, exit.
+		case <-s.quit:
+			return errServerShuttingDown
+		}
+	}
+}
diff --git a/lnrpc/routerrpc/subscribe_events.go b/lnrpc/routerrpc/subscribe_events.go
new file mode 100644
index 00000000..ce65a6c8
--- /dev/null
+++ b/lnrpc/routerrpc/subscribe_events.go
@@ -0,0 +1,241 @@
+// +build routerrpc
+
+package routerrpc
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/lightningnetwork/lnd/htlcswitch"
+	"github.com/lightningnetwork/lnd/invoices"
+	"github.com/lightningnetwork/lnd/lnrpc"
+)
+
+// rpcHtlcEvent returns a rpc htlc event from a htlcswitch event.
+func rpcHtlcEvent(htlcEvent interface{}) (*HtlcEvent, error) {
+	var (
+		key       htlcswitch.HtlcKey
+		timestamp time.Time
+		eventType htlcswitch.HtlcEventType
+		event     isHtlcEvent_Event
+	)
+
+	switch e := htlcEvent.(type) {
+	case *htlcswitch.ForwardingEvent:
+		event = &HtlcEvent_ForwardEvent{
+			ForwardEvent: &ForwardEvent{
+				Info: rpcInfo(e.HtlcInfo),
+			},
+		}
+
+		key = e.HtlcKey
+		eventType = e.HtlcEventType
+		timestamp = e.Timestamp
+
+	case *htlcswitch.ForwardingFailEvent:
+		event = &HtlcEvent_ForwardFailEvent{
+			ForwardFailEvent: &ForwardFailEvent{},
+		}
+
+		key = e.HtlcKey
+		eventType = e.HtlcEventType
+		timestamp = e.Timestamp
+
+	case *htlcswitch.LinkFailEvent:
+		failureCode, failReason, err := rpcFailReason(
+			e.LinkError,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		event = &HtlcEvent_LinkFailEvent{
+			LinkFailEvent: &LinkFailEvent{
+				Info:          rpcInfo(e.HtlcInfo),
+				WireFailure:   failureCode,
+				FailureDetail: failReason,
+				FailureString: e.LinkError.Error(),
+			},
+		}
+
+		key = e.HtlcKey
+		eventType = e.HtlcEventType
+		timestamp = e.Timestamp
+
+	case *htlcswitch.SettleEvent:
+		event = &HtlcEvent_SettleEvent{
+			SettleEvent: &SettleEvent{},
+		}
+
+		key = e.HtlcKey
+		eventType = e.HtlcEventType
+		timestamp = e.Timestamp
+
+	default:
+		return nil, fmt.Errorf("unknown event type: %T", e)
+	}
+
+	rpcEvent := &HtlcEvent{
+		IncomingChannelId: key.IncomingCircuit.ChanID.ToUint64(),
+		OutgoingChannelId: key.OutgoingCircuit.ChanID.ToUint64(),
+		IncomingHtlcId:    key.IncomingCircuit.HtlcID,
+		OutgoingHtlcId:    key.OutgoingCircuit.HtlcID,
+		TimestampNs:       uint64(timestamp.UnixNano()),
+		Event:             event,
+	}
+
+	// Convert the htlc event type to a rpc event.
+	switch eventType {
+	case htlcswitch.HtlcEventTypeSend:
+		rpcEvent.EventType = HtlcEvent_SEND
+
+	case htlcswitch.HtlcEventTypeReceive:
+		rpcEvent.EventType = HtlcEvent_RECEIVE
+
+	case htlcswitch.HtlcEventTypeForward:
+		rpcEvent.EventType = HtlcEvent_FORWARD
+
+	default:
+		return nil, fmt.Errorf("unknown event type: %v", eventType)
+	}
+
+	return rpcEvent, nil
+}
+
+// rpcInfo returns a rpc struct containing the htlc information from the
+// switch's htlc info struct.
+func rpcInfo(info htlcswitch.HtlcInfo) *HtlcInfo {
+	return &HtlcInfo{
+		IncomingTimelock: info.IncomingTimeLock,
+		OutgoingTimelock: info.OutgoingTimeLock,
+		IncomingAmtMsat:  uint64(info.IncomingAmt),
+		OutgoingAmtMsat:  uint64(info.OutgoingAmt),
+	}
+}
+
+// rpcFailReason maps a lnwire failure message and failure detail to a rpc
+// failure code and detail.
+func rpcFailReason(linkErr *htlcswitch.LinkError) (lnrpc.Failure_FailureCode,
+	FailureDetail, error) {
+
+	wireErr, err := marshallError(linkErr)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	switch failureDetail := linkErr.FailureDetail.(type) {
+	case invoices.FailResolutionResult:
+		fd, err := rpcFailureResolution(failureDetail)
+		return wireErr.GetCode(), fd, err
+
+	case htlcswitch.OutgoingFailure:
+		fd, err := rpcOutgoingFailure(failureDetail)
+		return wireErr.GetCode(), fd, err
+
+	default:
+		return 0, 0, fmt.Errorf("unknown failure "+
+			"detail type: %T", linkErr.FailureDetail)
+
+	}
+
+}
+
+// rpcFailureResolution maps an invoice failure resolution to a rpc failure
+// detail. Invoice failures have no zero resolution results (every failure
+// is accompanied with a result), so we error if we fail to match the result
+// type.
+func rpcFailureResolution(invoiceFailure invoices.FailResolutionResult) (
+	FailureDetail, error) {
+
+	switch invoiceFailure {
+	case invoices.ResultReplayToCanceled:
+		return FailureDetail_INVOICE_CANCELED, nil
+
+	case invoices.ResultInvoiceAlreadyCanceled:
+		return FailureDetail_INVOICE_CANCELED, nil
+
+	case invoices.ResultAmountTooLow:
+		return FailureDetail_INVOICE_UNDERPAID, nil
+
+	case invoices.ResultExpiryTooSoon:
+		return FailureDetail_INVOICE_EXPIRY_TOO_SOON, nil
+
+	case invoices.ResultCanceled:
+		return FailureDetail_INVOICE_CANCELED, nil
+
+	case invoices.ResultInvoiceNotOpen:
+		return FailureDetail_INVOICE_NOT_OPEN, nil
+
+	case invoices.ResultMppTimeout:
+		return FailureDetail_MPP_INVOICE_TIMEOUT, nil
+
+	case invoices.ResultAddressMismatch:
+		return FailureDetail_ADDRESS_MISMATCH, nil
+
+	case invoices.ResultHtlcSetTotalMismatch:
+		return FailureDetail_SET_TOTAL_MISMATCH, nil
+
+	case invoices.ResultHtlcSetTotalTooLow:
+		return FailureDetail_SET_TOTAL_TOO_LOW, nil
+
+	case invoices.ResultHtlcSetOverpayment:
+		return FailureDetail_SET_OVERPAID, nil
+
+	case invoices.ResultInvoiceNotFound:
+		return FailureDetail_UNKNOWN_INVOICE, nil
+
+	case invoices.ResultKeySendError:
+		return FailureDetail_INVALID_KEYSEND, nil
+
+	case invoices.ResultMppInProgress:
+		return FailureDetail_MPP_IN_PROGRESS, nil
+
+	default:
+		return 0, fmt.Errorf("unknown fail resolution: %v",
+			invoiceFailure.FailureString())
+	}
+}
+
+// rpcOutgoingFailure maps an outgoing failure to a rpc FailureDetail. If the
+// failure detail is FailureDetailNone, which indicates that the failure was
+// a wire message which required no further failure detail, we return a no
+// detail failure detail to indicate that there was no additional information.
+func rpcOutgoingFailure(failureDetail htlcswitch.OutgoingFailure) (
+	FailureDetail, error) {
+
+	switch failureDetail {
+	case htlcswitch.OutgoingFailureNone:
+		return FailureDetail_NO_DETAIL, nil
+
+	case htlcswitch.OutgoingFailureDecodeError:
+		return FailureDetail_ONION_DECODE, nil
+
+	case htlcswitch.OutgoingFailureLinkNotEligible:
+		return FailureDetail_LINK_NOT_ELIGIBLE, nil
+
+	case htlcswitch.OutgoingFailureOnChainTimeout:
+		return FailureDetail_ON_CHAIN_TIMEOUT, nil
+
+	case htlcswitch.OutgoingFailureHTLCExceedsMax:
+		return FailureDetail_HTLC_EXCEEDS_MAX, nil
+
+	case htlcswitch.OutgoingFailureInsufficientBalance:
+		return FailureDetail_INSUFFICIENT_BALANCE, nil
+
+	case htlcswitch.OutgoingFailureCircularRoute:
+		return FailureDetail_CIRCULAR_ROUTE, nil
+
+	case htlcswitch.OutgoingFailureIncompleteForward:
+		return FailureDetail_INCOMPLETE_FORWARD, nil
+
+	case htlcswitch.OutgoingFailureDownstreamHtlcAdd:
+		return FailureDetail_HTLC_ADD_FAILED, nil
+
+	case htlcswitch.OutgoingFailureForwardsDisabled:
+		return FailureDetail_FORWARDS_DISABLED, nil
+
+	default:
+		return 0, fmt.Errorf("unknown outgoing failure "+
+			"detail: %v", failureDetail.FailureString())
+	}
+}