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https://github.com/lightningnetwork/lnd.git
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routing+routerrpc: add BuildRoute function
This commit is contained in:
Joost Jager
parent
a0e91b5d41
commit
299821152a
@ -1197,6 +1197,122 @@ func (m *PairHistory) GetLastAttemptSuccessful() bool {
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return false
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}
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type BuildRouteRequest struct {
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//*
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//The amount to send expressed in msat. If set to zero, the minimum routable
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//amount is used.
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AmtMsat int64 `protobuf:"varint,1,opt,name=amt_msat,json=amtMsat,proto3" json:"amt_msat,omitempty"`
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//*
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//CLTV delta from the current height that should be used for the timelock
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//of the final hop
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FinalCltvDelta int32 `protobuf:"varint,2,opt,name=final_cltv_delta,json=finalCltvDelta,proto3" json:"final_cltv_delta,omitempty"`
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//*
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//The channel id of the channel that must be taken to the first hop. If zero,
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//any channel may be used.
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OutgoingChanId uint64 `protobuf:"varint,3,opt,name=outgoing_chan_id,json=outgoingChanId,proto3" json:"outgoing_chan_id,omitempty"`
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//*
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//A list of hops that defines the route. This does not include the source hop
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//pubkey.
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HopPubkeys [][]byte `protobuf:"bytes,4,rep,name=hop_pubkeys,json=hopPubkeys,proto3" json:"hop_pubkeys,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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}
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func (m *BuildRouteRequest) Reset() { *m = BuildRouteRequest{} }
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func (m *BuildRouteRequest) String() string { return proto.CompactTextString(m) }
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func (*BuildRouteRequest) ProtoMessage() {}
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func (*BuildRouteRequest) Descriptor() ([]byte, []int) {
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return fileDescriptor_7a0613f69d37b0a5, []int{15}
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}
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func (m *BuildRouteRequest) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_BuildRouteRequest.Unmarshal(m, b)
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}
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func (m *BuildRouteRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
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return xxx_messageInfo_BuildRouteRequest.Marshal(b, m, deterministic)
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}
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func (m *BuildRouteRequest) XXX_Merge(src proto.Message) {
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xxx_messageInfo_BuildRouteRequest.Merge(m, src)
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}
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func (m *BuildRouteRequest) XXX_Size() int {
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return xxx_messageInfo_BuildRouteRequest.Size(m)
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}
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func (m *BuildRouteRequest) XXX_DiscardUnknown() {
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xxx_messageInfo_BuildRouteRequest.DiscardUnknown(m)
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}
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var xxx_messageInfo_BuildRouteRequest proto.InternalMessageInfo
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func (m *BuildRouteRequest) GetAmtMsat() int64 {
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if m != nil {
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return m.AmtMsat
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}
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return 0
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}
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func (m *BuildRouteRequest) GetFinalCltvDelta() int32 {
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if m != nil {
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return m.FinalCltvDelta
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}
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return 0
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}
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func (m *BuildRouteRequest) GetOutgoingChanId() uint64 {
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if m != nil {
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return m.OutgoingChanId
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}
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return 0
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}
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func (m *BuildRouteRequest) GetHopPubkeys() [][]byte {
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if m != nil {
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return m.HopPubkeys
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}
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return nil
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}
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type BuildRouteResponse struct {
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//*
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//Fully specified route that can be used to execute the payment.
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Route *lnrpc.Route `protobuf:"bytes,1,opt,name=route,proto3" json:"route,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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}
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func (m *BuildRouteResponse) Reset() { *m = BuildRouteResponse{} }
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func (m *BuildRouteResponse) String() string { return proto.CompactTextString(m) }
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func (*BuildRouteResponse) ProtoMessage() {}
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func (*BuildRouteResponse) Descriptor() ([]byte, []int) {
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return fileDescriptor_7a0613f69d37b0a5, []int{16}
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}
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func (m *BuildRouteResponse) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_BuildRouteResponse.Unmarshal(m, b)
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}
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func (m *BuildRouteResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
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return xxx_messageInfo_BuildRouteResponse.Marshal(b, m, deterministic)
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}
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func (m *BuildRouteResponse) XXX_Merge(src proto.Message) {
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xxx_messageInfo_BuildRouteResponse.Merge(m, src)
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}
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func (m *BuildRouteResponse) XXX_Size() int {
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return xxx_messageInfo_BuildRouteResponse.Size(m)
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}
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func (m *BuildRouteResponse) XXX_DiscardUnknown() {
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xxx_messageInfo_BuildRouteResponse.DiscardUnknown(m)
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}
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var xxx_messageInfo_BuildRouteResponse proto.InternalMessageInfo
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func (m *BuildRouteResponse) GetRoute() *lnrpc.Route {
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if m != nil {
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return m.Route
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}
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return nil
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}
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func init() {
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proto.RegisterEnum("routerrpc.PaymentState", PaymentState_name, PaymentState_value)
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proto.RegisterEnum("routerrpc.Failure_FailureCode", Failure_FailureCode_name, Failure_FailureCode_value)
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@ -1216,123 +1332,131 @@ func init() {
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proto.RegisterType((*QueryMissionControlResponse)(nil), "routerrpc.QueryMissionControlResponse")
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proto.RegisterType((*NodeHistory)(nil), "routerrpc.NodeHistory")
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proto.RegisterType((*PairHistory)(nil), "routerrpc.PairHistory")
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proto.RegisterType((*BuildRouteRequest)(nil), "routerrpc.BuildRouteRequest")
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proto.RegisterType((*BuildRouteResponse)(nil), "routerrpc.BuildRouteResponse")
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}
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func init() { proto.RegisterFile("routerrpc/router.proto", fileDescriptor_7a0613f69d37b0a5) }
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var fileDescriptor_7a0613f69d37b0a5 = []byte{
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// 1769 bytes of a gzipped FileDescriptorProto
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0x2f, 0xc9, 0x76, 0xa4, 0xdb, 0x0b, 0xd9, 0x7d, 0xb7, 0x9f, 0xa0, 0x1d, 0xd8, 0x4c, 0x4e, 0x4b,
|
||||
0xc0, 0x7f, 0x15, 0xd0, 0x1e, 0xa0, 0x81, 0x4d, 0x70, 0xa3, 0x25, 0x2f, 0x3f, 0x17, 0xfc, 0xbb,
|
||||
0xf0, 0x3a, 0x57, 0x5c, 0x33, 0xb2, 0xf5, 0xbf, 0x67, 0xa1, 0xba, 0xd4, 0x83, 0xe8, 0x00, 0x4a,
|
||||
0x91, 0x7b, 0xed, 0x33, 0x21, 0x59, 0x42, 0x13, 0xc8, 0x02, 0x50, 0xef, 0xe0, 0x98, 0xb9, 0xbe,
|
||||
0x66, 0x2e, 0xcd, 0xdc, 0x25, 0x85, 0x28, 0xde, 0xda, 0x83, 0x42, 0xf2, 0x8e, 0x66, 0x55, 0xbf,
|
||||
0xae, 0x0f, 0xf5, 0xfb, 0x79, 0x00, 0x25, 0x49, 0x8d, 0x91, 0x60, 0x93, 0xa9, 0x6a, 0xe5, 0x2a,
|
||||
0x59, 0x00, 0xe8, 0x73, 0xa8, 0x4e, 0x78, 0x14, 0xb1, 0x6b, 0x4e, 0x75, 0x3b, 0x82, 0xd2, 0xa8,
|
||||
0xc4, 0x60, 0x5b, 0x75, 0xe5, 0xe7, 0x90, 0xd0, 0x43, 0xac, 0x94, 0xd7, 0x4a, 0x31, 0xa8, 0x95,
|
||||
0xee, 0x33, 0xb3, 0x60, 0x71, 0xd7, 0xa7, 0x99, 0x59, 0x30, 0xf4, 0x02, 0xb6, 0x34, 0xb5, 0xb8,
|
||||
0xbe, 0x3b, 0x99, 0x4d, 0x34, 0xc5, 0x14, 0x94, 0xcb, 0x9b, 0x8a, 0x62, 0x34, 0xae, 0x98, 0xe6,
|
||||
0x29, 0x14, 0x2f, 0x59, 0xc4, 0xe5, 0xa3, 0x10, 0x53, 0x40, 0x41, 0xae, 0xdb, 0x9c, 0x4b, 0x91,
|
||||
0x7c, 0x2a, 0x42, 0x49, 0x6e, 0xba, 0xf3, 0x0b, 0x57, 0x9c, 0x13, 0x19, 0xc7, 0xf9, 0x09, 0xec,
|
||||
0xc3, 0xe2, 0x84, 0x72, 0xea, 0x04, 0x8d, 0xab, 0x13, 0x5e, 0xc0, 0x16, 0xff, 0x20, 0x42, 0x46,
|
||||
0x83, 0x29, 0x7b, 0x3f, 0xe3, 0x74, 0xc4, 0x04, 0x33, 0x2b, 0x2a, 0xb8, 0x9b, 0x4a, 0xe0, 0x28,
|
||||
0xbc, 0xc5, 0x04, 0xab, 0x1f, 0x40, 0x8d, 0xf0, 0x88, 0x8b, 0xae, 0x1b, 0x45, 0x6e, 0xe0, 0x37,
|
||||
0x03, 0x5f, 0x84, 0x81, 0x17, 0xbf, 0x2d, 0xf5, 0x43, 0xd8, 0x5f, 0x29, 0xd5, 0x8f, 0x83, 0xdc,
|
||||
0xfc, 0xc3, 0x8c, 0x87, 0x77, 0xab, 0x37, 0xdf, 0xc1, 0xfe, 0x4a, 0x69, 0xfc, 0xb2, 0x7c, 0x05,
|
||||
0x79, 0x3f, 0x18, 0xf1, 0xc8, 0xcc, 0xa8, 0x69, 0x65, 0x37, 0x45, 0xe3, 0x76, 0x30, 0xe2, 0xe7,
|
||||
0x6e, 0x24, 0x82, 0xf0, 0x8e, 0x68, 0x25, 0xa9, 0x3d, 0x65, 0x6e, 0x18, 0x99, 0x6b, 0x0f, 0xb4,
|
||||
0x2f, 0x98, 0x1b, 0xce, 0xb5, 0x95, 0x52, 0xfd, 0xcf, 0x19, 0x28, 0xa7, 0x8c, 0x48, 0x42, 0x9d,
|
||||
0xce, 0x2e, 0x93, 0x41, 0xa6, 0x42, 0xe2, 0x15, 0x7a, 0x0e, 0x1b, 0x1e, 0x8b, 0x04, 0x95, 0x1c,
|
||||
0x4c, 0x65, 0x4a, 0xe3, 0x87, 0xf7, 0x1e, 0x8a, 0x4e, 0x00, 0x05, 0x62, 0xcc, 0x43, 0x1a, 0xcd,
|
||||
0x86, 0x43, 0x1e, 0x45, 0x74, 0x1a, 0x06, 0x97, 0xaa, 0x26, 0xd7, 0xc8, 0x0a, 0xc9, 0xeb, 0x5c,
|
||||
0x31, 0x67, 0xe4, 0xeb, 0xff, 0xc9, 0x40, 0x39, 0xe5, 0x9c, 0xac, 0x5a, 0x79, 0x19, 0x7a, 0x15,
|
||||
0x06, 0x93, 0xa4, 0x17, 0xe6, 0x00, 0x32, 0xa1, 0xa0, 0x16, 0x22, 0x88, 0x1b, 0x21, 0x59, 0x2e,
|
||||
0x57, 0x7b, 0x56, 0x39, 0x98, 0xaa, 0xf6, 0x33, 0xd8, 0x99, 0xb8, 0x3e, 0x9d, 0x72, 0x9f, 0x79,
|
||||
0xee, 0x1f, 0x39, 0x4d, 0x26, 0x94, 0x9c, 0x52, 0x5c, 0x29, 0x43, 0x75, 0xa8, 0x2c, 0xdd, 0x24,
|
||||
0xaf, 0x6e, 0xb2, 0x84, 0xa1, 0x97, 0xb0, 0xa7, 0xa2, 0xc0, 0x84, 0xe0, 0x93, 0xa9, 0x48, 0x2e,
|
||||
0x78, 0x35, 0xf3, 0x54, 0x0f, 0x14, 0xc9, 0x63, 0xe2, 0xfa, 0xdf, 0x32, 0xb0, 0xf5, 0x6a, 0xe6,
|
||||
0x7a, 0xa3, 0xa5, 0x39, 0xe5, 0x29, 0x14, 0xe5, 0xf1, 0xa9, 0x39, 0x48, 0x0e, 0x53, 0xaa, 0x60,
|
||||
0x57, 0x0d, 0xf6, 0x6b, 0x2b, 0x07, 0xfb, 0x55, 0x23, 0x76, 0x76, 0xe5, 0x88, 0xfd, 0x0c, 0xca,
|
||||
0xe3, 0x60, 0x4a, 0x75, 0xa2, 0x23, 0x33, 0x77, 0x94, 0x3d, 0xae, 0x10, 0x18, 0x07, 0xd3, 0x0b,
|
||||
0x8d, 0xd4, 0x5f, 0x02, 0x4a, 0x3b, 0x19, 0x57, 0xe5, 0x7c, 0x54, 0xca, 0x3c, 0x3a, 0x2a, 0xbd,
|
||||
0xf8, 0x4b, 0x06, 0x2a, 0xe9, 0x29, 0x14, 0x55, 0xa1, 0x64, 0xd9, 0xb4, 0xdd, 0xb1, 0xbe, 0x3f,
|
||||
0xef, 0x1b, 0x9f, 0xc8, 0x65, 0x6f, 0xd0, 0x6c, 0x62, 0xdc, 0xc2, 0x2d, 0x23, 0x83, 0x10, 0x6c,
|
||||
0x48, 0xa2, 0xc4, 0x2d, 0xda, 0xb7, 0xba, 0xd8, 0x19, 0xc8, 0x37, 0x76, 0x1b, 0x36, 0x63, 0xcc,
|
||||
0x76, 0x28, 0x71, 0x06, 0x7d, 0x6c, 0x64, 0x91, 0x01, 0x95, 0x18, 0xc4, 0x84, 0x38, 0xc4, 0xc8,
|
||||
0xc9, 0x87, 0x21, 0x46, 0x1e, 0xbe, 0xd7, 0xc9, 0x73, 0x9e, 0x3f, 0xfb, 0x47, 0x0e, 0xd6, 0x95,
|
||||
0x83, 0x21, 0x3a, 0x87, 0x72, 0x6a, 0xd4, 0x47, 0x87, 0x1f, 0xfd, 0x17, 0xa0, 0x66, 0xae, 0x1e,
|
||||
0xab, 0x67, 0xd1, 0xd7, 0x19, 0xf4, 0x1a, 0x2a, 0xe9, 0x61, 0x1e, 0xa5, 0x87, 0xb4, 0x15, 0x53,
|
||||
0xfe, 0x47, 0x6d, 0xbd, 0x01, 0x03, 0x47, 0xc2, 0x9d, 0xc8, 0xa1, 0x2c, 0x1e, 0x93, 0x51, 0x2d,
|
||||
0xa5, 0x7f, 0x6f, 0xf6, 0xae, 0xed, 0xaf, 0x94, 0xc5, 0x19, 0xea, 0xe8, 0x2b, 0xc6, 0x83, 0xea,
|
||||
0x83, 0x2b, 0x2e, 0x4f, 0xc7, 0xb5, 0x4f, 0x1f, 0x13, 0xc7, 0xd6, 0x46, 0xb0, 0xbd, 0x82, 0xe1,
|
||||
0xd0, 0x2f, 0xd2, 0x1e, 0x3c, 0xca, 0x8f, 0xb5, 0xe7, 0xff, 0x4f, 0x6d, 0x71, 0xca, 0x0a, 0x2a,
|
||||
0x5c, 0x3a, 0xe5, 0x71, 0x22, 0x5d, 0x3a, 0xe5, 0x63, 0x8c, 0x6a, 0x01, 0x2c, 0x2a, 0x1a, 0x1d,
|
||||
0xa4, 0x76, 0x3d, 0xe8, 0xc6, 0xda, 0xe1, 0x23, 0x52, 0x6d, 0xea, 0xd5, 0xaf, 0x7e, 0x77, 0x7a,
|
||||
0xed, 0x8a, 0xf1, 0xec, 0xf2, 0x64, 0x18, 0x4c, 0x4e, 0x3d, 0x39, 0x7d, 0xfa, 0xae, 0x7f, 0xed,
|
||||
0x73, 0xf1, 0x87, 0x20, 0xbc, 0x39, 0xf5, 0xfc, 0xd1, 0xa9, 0x6a, 0x8c, 0xd3, 0xb9, 0x95, 0xcb,
|
||||
0x75, 0xf5, 0x23, 0xc0, 0xaf, 0xff, 0x17, 0x00, 0x00, 0xff, 0xff, 0x85, 0xe2, 0x3f, 0x31, 0x34,
|
||||
0x10, 0x00, 0x00,
|
||||
}
|
||||
|
||||
// Reference imports to suppress errors if they are not otherwise used.
|
||||
@ -1373,6 +1497,11 @@ type RouterClient interface {
|
||||
//QueryMissionControl exposes the internal mission control state to callers.
|
||||
//It is a development feature.
|
||||
QueryMissionControl(ctx context.Context, in *QueryMissionControlRequest, opts ...grpc.CallOption) (*QueryMissionControlResponse, error)
|
||||
//*
|
||||
//BuildRoute builds a fully specified route based on a list of hop public
|
||||
//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)
|
||||
}
|
||||
|
||||
type routerClient struct {
|
||||
@ -1483,6 +1612,15 @@ func (c *routerClient) QueryMissionControl(ctx context.Context, in *QueryMission
|
||||
return out, nil
|
||||
}
|
||||
|
||||
func (c *routerClient) BuildRoute(ctx context.Context, in *BuildRouteRequest, opts ...grpc.CallOption) (*BuildRouteResponse, error) {
|
||||
out := new(BuildRouteResponse)
|
||||
err := c.cc.Invoke(ctx, "/routerrpc.Router/BuildRoute", in, out, opts...)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return out, nil
|
||||
}
|
||||
|
||||
// RouterServer is the server API for Router service.
|
||||
type RouterServer interface {
|
||||
//*
|
||||
@ -1511,6 +1649,11 @@ type RouterServer interface {
|
||||
//QueryMissionControl exposes the internal mission control state to callers.
|
||||
//It is a development feature.
|
||||
QueryMissionControl(context.Context, *QueryMissionControlRequest) (*QueryMissionControlResponse, error)
|
||||
//*
|
||||
//BuildRoute builds a fully specified route based on a list of hop public
|
||||
//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)
|
||||
}
|
||||
|
||||
func RegisterRouterServer(s *grpc.Server, srv RouterServer) {
|
||||
@ -1631,6 +1774,24 @@ func _Router_QueryMissionControl_Handler(srv interface{}, ctx context.Context, d
|
||||
return interceptor(ctx, in, info, handler)
|
||||
}
|
||||
|
||||
func _Router_BuildRoute_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
|
||||
in := new(BuildRouteRequest)
|
||||
if err := dec(in); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if interceptor == nil {
|
||||
return srv.(RouterServer).BuildRoute(ctx, in)
|
||||
}
|
||||
info := &grpc.UnaryServerInfo{
|
||||
Server: srv,
|
||||
FullMethod: "/routerrpc.Router/BuildRoute",
|
||||
}
|
||||
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
|
||||
return srv.(RouterServer).BuildRoute(ctx, req.(*BuildRouteRequest))
|
||||
}
|
||||
return interceptor(ctx, in, info, handler)
|
||||
}
|
||||
|
||||
var _Router_serviceDesc = grpc.ServiceDesc{
|
||||
ServiceName: "routerrpc.Router",
|
||||
HandlerType: (*RouterServer)(nil),
|
||||
@ -1651,6 +1812,10 @@ var _Router_serviceDesc = grpc.ServiceDesc{
|
||||
MethodName: "QueryMissionControl",
|
||||
Handler: _Router_QueryMissionControl_Handler,
|
||||
},
|
||||
{
|
||||
MethodName: "BuildRoute",
|
||||
Handler: _Router_BuildRoute_Handler,
|
||||
},
|
||||
},
|
||||
Streams: []grpc.StreamDesc{
|
||||
{
|
||||
|
||||
@ -380,6 +380,39 @@ message PairHistory {
|
||||
bool last_attempt_successful = 6 [json_name = "last_attempt_successful"];
|
||||
}
|
||||
|
||||
message BuildRouteRequest {
|
||||
/**
|
||||
The amount to send expressed in msat. If set to zero, the minimum routable
|
||||
amount is used.
|
||||
*/
|
||||
int64 amt_msat = 1;
|
||||
|
||||
/**
|
||||
CLTV delta from the current height that should be used for the timelock
|
||||
of the final hop
|
||||
*/
|
||||
int32 final_cltv_delta = 2;
|
||||
|
||||
/**
|
||||
The channel id of the channel that must be taken to the first hop. If zero,
|
||||
any channel may be used.
|
||||
*/
|
||||
uint64 outgoing_chan_id = 3;
|
||||
|
||||
/**
|
||||
A list of hops that defines the route. This does not include the source hop
|
||||
pubkey.
|
||||
*/
|
||||
repeated bytes hop_pubkeys = 4;
|
||||
}
|
||||
|
||||
message BuildRouteResponse {
|
||||
/**
|
||||
Fully specified route that can be used to execute the payment.
|
||||
*/
|
||||
lnrpc.Route route = 1;
|
||||
}
|
||||
|
||||
service Router {
|
||||
/**
|
||||
SendPayment attempts to route a payment described by the passed
|
||||
@ -419,4 +452,11 @@ service Router {
|
||||
It is a development feature.
|
||||
*/
|
||||
rpc QueryMissionControl(QueryMissionControlRequest) returns (QueryMissionControlResponse);
|
||||
|
||||
/**
|
||||
BuildRoute builds a fully specified route based on a list of hop public
|
||||
keys. It retrieves the relevant channel policies from the graph in order to
|
||||
calculate the correct fees and time locks.
|
||||
*/
|
||||
rpc BuildRoute(BuildRouteRequest) returns (BuildRouteResponse);
|
||||
}
|
||||
|
||||
@ -72,6 +72,10 @@ var (
|
||||
Entity: "offchain",
|
||||
Action: "write",
|
||||
}},
|
||||
"/routerrpc.Router/BuildRoute": {{
|
||||
Entity: "offchain",
|
||||
Action: "read",
|
||||
}},
|
||||
}
|
||||
|
||||
// DefaultRouterMacFilename is the default name of the router macaroon
|
||||
@ -612,3 +616,49 @@ func marshallFailureReason(reason channeldb.FailureReason) (
|
||||
|
||||
return 0, errors.New("unknown failure reason")
|
||||
}
|
||||
|
||||
// BuildRoute builds a route from a list of hop addresses.
|
||||
func (s *Server) BuildRoute(ctx context.Context,
|
||||
req *BuildRouteRequest) (*BuildRouteResponse, error) {
|
||||
|
||||
// Unmarshall hop list.
|
||||
hops := make([]route.Vertex, len(req.HopPubkeys))
|
||||
for i, pubkeyBytes := range req.HopPubkeys {
|
||||
pubkey, err := route.NewVertexFromBytes(pubkeyBytes)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
hops[i] = pubkey
|
||||
}
|
||||
|
||||
// Prepare BuildRoute call parameters from rpc request.
|
||||
var amt *lnwire.MilliSatoshi
|
||||
if req.AmtMsat != 0 {
|
||||
rpcAmt := lnwire.MilliSatoshi(req.AmtMsat)
|
||||
amt = &rpcAmt
|
||||
}
|
||||
|
||||
var outgoingChan *uint64
|
||||
if req.OutgoingChanId != 0 {
|
||||
outgoingChan = &req.OutgoingChanId
|
||||
}
|
||||
|
||||
// Build the route and return it to the caller.
|
||||
route, err := s.cfg.Router.BuildRoute(
|
||||
amt, hops, outgoingChan, req.FinalCltvDelta,
|
||||
)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
rpcRoute, err := s.cfg.RouterBackend.MarshallRoute(route)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
routeResp := &BuildRouteResponse{
|
||||
Route: rpcRoute,
|
||||
}
|
||||
|
||||
return routeResp, nil
|
||||
}
|
||||
|
||||
@ -2249,3 +2249,297 @@ func generateBandwidthHints(sourceNode *channeldb.LightningNode,
|
||||
|
||||
return bandwidthHints, nil
|
||||
}
|
||||
|
||||
// runningAmounts keeps running amounts while the route is traversed.
|
||||
type runningAmounts struct {
|
||||
// amt is the intended amount to send via the route.
|
||||
amt lnwire.MilliSatoshi
|
||||
|
||||
// max is the running maximum that the route can carry.
|
||||
max lnwire.MilliSatoshi
|
||||
}
|
||||
|
||||
// prependChannel returns a new set of running amounts that would result from
|
||||
// prepending the given channel to the route. If canIncreaseAmt is set, the
|
||||
// amount may be increased if it is too small to satisfy the channel's minimum
|
||||
// htlc amount.
|
||||
func (r *runningAmounts) prependChannel(policy *channeldb.ChannelEdgePolicy,
|
||||
capacity btcutil.Amount, localChan bool, canIncreaseAmt bool) (
|
||||
runningAmounts, error) {
|
||||
|
||||
// Determine max htlc value.
|
||||
maxHtlc := lnwire.NewMSatFromSatoshis(capacity)
|
||||
if policy.MessageFlags.HasMaxHtlc() {
|
||||
maxHtlc = policy.MaxHTLC
|
||||
}
|
||||
|
||||
amt := r.amt
|
||||
|
||||
// If we have a specific amount for which we are building the route,
|
||||
// validate it against the channel constraints and return the new
|
||||
// running amount.
|
||||
if !canIncreaseAmt {
|
||||
if amt < policy.MinHTLC || amt > maxHtlc {
|
||||
return runningAmounts{}, fmt.Errorf("channel htlc "+
|
||||
"constraints [%v - %v] violated with amt %v",
|
||||
policy.MinHTLC, maxHtlc, amt)
|
||||
}
|
||||
|
||||
// Update running amount by adding the fee for non-local
|
||||
// channels.
|
||||
if !localChan {
|
||||
amt += policy.ComputeFee(amt)
|
||||
}
|
||||
|
||||
return runningAmounts{
|
||||
amt: amt,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// Adapt the minimum amount to what this channel allows.
|
||||
if policy.MinHTLC > r.amt {
|
||||
amt = policy.MinHTLC
|
||||
}
|
||||
|
||||
// Update the maximum amount too to be able to detect incompatible
|
||||
// channels.
|
||||
max := r.max
|
||||
if maxHtlc < r.max {
|
||||
max = maxHtlc
|
||||
}
|
||||
|
||||
// If we get in the situation that the minimum amount exceeds the
|
||||
// maximum amount (enforced further down stream), we have incompatible
|
||||
// channel policies.
|
||||
//
|
||||
// There is possibility with pubkey addressing that we should have
|
||||
// selected a different channel downstream, but we don't backtrack to
|
||||
// try to fix that. It would complicate path finding while we expect
|
||||
// this situation to be rare. The spec recommends to keep all policies
|
||||
// towards a peer identical. If that is the case, there isn't a better
|
||||
// channel that we should have selected.
|
||||
if amt > max {
|
||||
return runningAmounts{},
|
||||
fmt.Errorf("incompatible channel policies: %v "+
|
||||
"exceeds %v", amt, max)
|
||||
}
|
||||
|
||||
// Add fees to the running amounts. Skip the source node fees as
|
||||
// those do not need to be paid.
|
||||
if !localChan {
|
||||
amt += policy.ComputeFee(amt)
|
||||
max += policy.ComputeFee(max)
|
||||
}
|
||||
|
||||
return runningAmounts{amt: amt, max: max}, nil
|
||||
}
|
||||
|
||||
// ErrNoChannel is returned when a route cannot be built because there are no
|
||||
// channels that satisfy all requirements.
|
||||
type ErrNoChannel struct {
|
||||
position int
|
||||
fromNode route.Vertex
|
||||
}
|
||||
|
||||
// Error returns a human readable string describing the error.
|
||||
func (e ErrNoChannel) Error() string {
|
||||
return fmt.Sprintf("no matching outgoing channel available for "+
|
||||
"node %v (%v)", e.position, e.fromNode)
|
||||
}
|
||||
|
||||
// BuildRoute returns a fully specified route based on a list of pubkeys. If
|
||||
// amount is nil, the minimum routable amount is used. To force a specific
|
||||
// outgoing channel, use the outgoingChan parameter.
|
||||
func (r *ChannelRouter) BuildRoute(amt *lnwire.MilliSatoshi,
|
||||
hops []route.Vertex, outgoingChan *uint64,
|
||||
finalCltvDelta int32) (*route.Route, error) {
|
||||
|
||||
log.Tracef("BuildRoute called: hopsCount=%v, amt=%v",
|
||||
len(hops), amt)
|
||||
|
||||
// If no amount is specified, we need to build a route for the minimum
|
||||
// amount that this route can carry.
|
||||
useMinAmt := amt == nil
|
||||
|
||||
// We'll attempt to obtain a set of bandwidth hints that helps us select
|
||||
// the best outgoing channel to use in case no outgoing channel is set.
|
||||
bandwidthHints, err := generateBandwidthHints(
|
||||
r.selfNode, r.cfg.QueryBandwidth,
|
||||
)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Allocate a list that will contain the selected channels for this
|
||||
// route.
|
||||
edges := make([]*channeldb.ChannelEdgePolicy, len(hops))
|
||||
|
||||
// Keep a running amount and the maximum for this route.
|
||||
amts := runningAmounts{
|
||||
max: lnwire.MilliSatoshi(^uint64(0)),
|
||||
}
|
||||
if useMinAmt {
|
||||
// For minimum amount routes, aim to deliver at least 1 msat to
|
||||
// the destination. There are nodes in the wild that have a
|
||||
// min_htlc channel policy of zero, which could lead to a zero
|
||||
// amount payment being made.
|
||||
amts.amt = 1
|
||||
} else {
|
||||
// If an amount is specified, we need to build a route that
|
||||
// delivers exactly this amount to the final destination.
|
||||
amts.amt = *amt
|
||||
}
|
||||
|
||||
// Traverse hops backwards to accumulate fees in the running amounts.
|
||||
source := r.selfNode.PubKeyBytes
|
||||
for i := len(hops) - 1; i >= 0; i-- {
|
||||
toNode := hops[i]
|
||||
|
||||
var fromNode route.Vertex
|
||||
if i == 0 {
|
||||
fromNode = source
|
||||
} else {
|
||||
fromNode = hops[i-1]
|
||||
}
|
||||
|
||||
localChan := i == 0
|
||||
|
||||
// Iterate over candidate channels to select the channel
|
||||
// to use for the final route.
|
||||
var (
|
||||
bestEdge *channeldb.ChannelEdgePolicy
|
||||
bestAmts *runningAmounts
|
||||
bestBandwidth lnwire.MilliSatoshi
|
||||
)
|
||||
|
||||
cb := func(tx *bbolt.Tx,
|
||||
edgeInfo *channeldb.ChannelEdgeInfo,
|
||||
_, inEdge *channeldb.ChannelEdgePolicy) error {
|
||||
|
||||
chanID := edgeInfo.ChannelID
|
||||
|
||||
// Apply outgoing channel restriction is active.
|
||||
if localChan && outgoingChan != nil &&
|
||||
chanID != *outgoingChan {
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// No unknown policy channels.
|
||||
if inEdge == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
// Before we can process the edge, we'll need to
|
||||
// fetch the node on the _other_ end of this
|
||||
// channel as we may later need to iterate over
|
||||
// the incoming edges of this node if we explore
|
||||
// it further.
|
||||
chanFromNode, err := edgeInfo.FetchOtherNode(
|
||||
tx, toNode[:],
|
||||
)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Continue searching if this channel doesn't
|
||||
// connect with the previous hop.
|
||||
if chanFromNode.PubKeyBytes != fromNode {
|
||||
return nil
|
||||
}
|
||||
|
||||
// Validate whether this channel's policy is satisfied
|
||||
// and obtain the new running amounts if this channel
|
||||
// was to be selected.
|
||||
newAmts, err := amts.prependChannel(
|
||||
inEdge, edgeInfo.Capacity, localChan,
|
||||
useMinAmt,
|
||||
)
|
||||
if err != nil {
|
||||
log.Tracef("Skipping chan %v: %v",
|
||||
inEdge.ChannelID, err)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// If we already have a best edge, check whether this
|
||||
// edge is better.
|
||||
bandwidth := bandwidthHints[chanID]
|
||||
if bestEdge != nil {
|
||||
if localChan {
|
||||
// For local channels, better is defined
|
||||
// as having more bandwidth. We try to
|
||||
// maximize the chance that the returned
|
||||
// route succeeds.
|
||||
if bandwidth < bestBandwidth {
|
||||
return nil
|
||||
}
|
||||
} else {
|
||||
// For other channels, better is defined
|
||||
// as lower fees for the amount to send.
|
||||
// Normally all channels between two
|
||||
// nodes should have the same policy,
|
||||
// but in case not we minimize our cost
|
||||
// here. Regular path finding would do
|
||||
// the same.
|
||||
if newAmts.amt > bestAmts.amt {
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// If we get here, the current edge is better. Replace
|
||||
// the best.
|
||||
bestEdge = inEdge
|
||||
bestAmts = &newAmts
|
||||
bestBandwidth = bandwidth
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
err := r.cfg.Graph.ForEachNodeChannel(nil, toNode[:], cb)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// There is no matching channel. Stop building the route here.
|
||||
if bestEdge == nil {
|
||||
return nil, ErrNoChannel{
|
||||
fromNode: fromNode,
|
||||
position: i,
|
||||
}
|
||||
}
|
||||
|
||||
log.Tracef("Select channel %v at position %v", bestEdge.ChannelID, i)
|
||||
|
||||
edges[i] = bestEdge
|
||||
amts = *bestAmts
|
||||
}
|
||||
|
||||
_, height, err := r.cfg.Chain.GetBestBlock()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
var receiverAmt lnwire.MilliSatoshi
|
||||
if useMinAmt {
|
||||
// We've calculated the minimum amount for the htlc that the
|
||||
// source node hands out. The newRoute call below expects the
|
||||
// amount that must reach the receiver after subtraction of fees
|
||||
// along the way. Iterate over all edges to calculate the
|
||||
// receiver amount.
|
||||
receiverAmt = amts.amt
|
||||
for _, edge := range edges[1:] {
|
||||
receiverAmt -= edge.ComputeFeeFromIncoming(receiverAmt)
|
||||
}
|
||||
} else {
|
||||
// Deliver the specified amount to the receiver.
|
||||
receiverAmt = *amt
|
||||
}
|
||||
|
||||
// Build and return the final route.
|
||||
return newRoute(
|
||||
receiverAmt, source, edges, uint32(height),
|
||||
uint16(finalCltvDelta), nil,
|
||||
)
|
||||
}
|
||||
|
||||
@ -3330,3 +3330,146 @@ func TestSendToRouteStructuredError(t *testing.T) {
|
||||
t.Fatalf("initPayment not called")
|
||||
}
|
||||
}
|
||||
|
||||
// TestBuildRoute tests whether correct routes are built.
|
||||
func TestBuildRoute(t *testing.T) {
|
||||
// Setup a three node network.
|
||||
chanCapSat := btcutil.Amount(100000)
|
||||
testChannels := []*testChannel{
|
||||
// Create two local channels from a. The bandwidth is estimated
|
||||
// in this test as the channel capacity. For building routes, we
|
||||
// expected the channel with the largest estimated bandwidth to
|
||||
// be selected.
|
||||
symmetricTestChannel("a", "b", chanCapSat, &testChannelPolicy{
|
||||
Expiry: 144,
|
||||
FeeRate: 20000,
|
||||
MinHTLC: lnwire.NewMSatFromSatoshis(5),
|
||||
MaxHTLC: lnwire.NewMSatFromSatoshis(chanCapSat),
|
||||
}, 1),
|
||||
symmetricTestChannel("a", "b", chanCapSat/2, &testChannelPolicy{
|
||||
Expiry: 144,
|
||||
FeeRate: 20000,
|
||||
MinHTLC: lnwire.NewMSatFromSatoshis(5),
|
||||
MaxHTLC: lnwire.NewMSatFromSatoshis(chanCapSat / 2),
|
||||
}, 6),
|
||||
|
||||
// Create two channels from b to c. For building routes, we
|
||||
// expect the lowest cost channel to be selected. Note that this
|
||||
// isn't a situation that we are expecting in reality. Routing
|
||||
// nodes are recommended to keep their channel policies towards
|
||||
// the same peer identical.
|
||||
symmetricTestChannel("b", "c", chanCapSat, &testChannelPolicy{
|
||||
Expiry: 144,
|
||||
FeeRate: 50000,
|
||||
MinHTLC: lnwire.NewMSatFromSatoshis(20),
|
||||
MaxHTLC: lnwire.NewMSatFromSatoshis(120),
|
||||
}, 2),
|
||||
symmetricTestChannel("b", "c", chanCapSat, &testChannelPolicy{
|
||||
Expiry: 144,
|
||||
FeeRate: 60000,
|
||||
MinHTLC: lnwire.NewMSatFromSatoshis(20),
|
||||
MaxHTLC: lnwire.NewMSatFromSatoshis(120),
|
||||
}, 7),
|
||||
|
||||
symmetricTestChannel("a", "e", chanCapSat, &testChannelPolicy{
|
||||
Expiry: 144,
|
||||
FeeRate: 80000,
|
||||
MinHTLC: lnwire.NewMSatFromSatoshis(5),
|
||||
MaxHTLC: lnwire.NewMSatFromSatoshis(10),
|
||||
}, 5),
|
||||
symmetricTestChannel("e", "c", chanCapSat, &testChannelPolicy{
|
||||
Expiry: 144,
|
||||
FeeRate: 100000,
|
||||
MinHTLC: lnwire.NewMSatFromSatoshis(20),
|
||||
MaxHTLC: lnwire.NewMSatFromSatoshis(chanCapSat),
|
||||
}, 4),
|
||||
}
|
||||
|
||||
testGraph, err := createTestGraphFromChannels(testChannels, "a")
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create graph: %v", err)
|
||||
}
|
||||
defer testGraph.cleanUp()
|
||||
|
||||
const startingBlockHeight = 101
|
||||
|
||||
ctx, cleanUp, err := createTestCtxFromGraphInstance(
|
||||
startingBlockHeight, testGraph,
|
||||
)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create router: %v", err)
|
||||
}
|
||||
defer cleanUp()
|
||||
|
||||
checkHops := func(rt *route.Route, expected []uint64) {
|
||||
if len(rt.Hops) != len(expected) {
|
||||
t.Fatal("hop count mismatch")
|
||||
}
|
||||
for i, hop := range rt.Hops {
|
||||
if hop.ChannelID != expected[i] {
|
||||
t.Fatalf("expected channel %v at pos %v, but "+
|
||||
"got channel %v",
|
||||
expected[i], i, hop.ChannelID)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Create hop list from the route node pubkeys.
|
||||
hops := []route.Vertex{
|
||||
ctx.aliases["b"], ctx.aliases["c"],
|
||||
}
|
||||
amt := lnwire.NewMSatFromSatoshis(100)
|
||||
|
||||
// Build the route for the given amount.
|
||||
rt, err := ctx.router.BuildRoute(
|
||||
&amt, hops, nil, 40,
|
||||
)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
// Check that we get the expected route back. The total amount should be
|
||||
// the amount to deliver to hop c (100 sats) plus the fee for hop b (5
|
||||
// sats).
|
||||
checkHops(rt, []uint64{1, 2})
|
||||
if rt.TotalAmount != 105000 {
|
||||
t.Fatalf("unexpected total amount %v", rt.TotalAmount)
|
||||
}
|
||||
|
||||
// Build the route for the minimum amount.
|
||||
rt, err = ctx.router.BuildRoute(
|
||||
nil, hops, nil, 40,
|
||||
)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
// Check that we get the expected route back. The minimum that we can
|
||||
// send from b to c is 20 sats. Hop b charges 1 sat for the forwarding.
|
||||
// The channel between hop a and b can carry amounts in the range [5,
|
||||
// 100], so 21 sats is the minimum amount for this route.
|
||||
checkHops(rt, []uint64{1, 2})
|
||||
if rt.TotalAmount != 21000 {
|
||||
t.Fatalf("unexpected total amount %v", rt.TotalAmount)
|
||||
}
|
||||
|
||||
// Test a route that contains incompatible channel htlc constraints.
|
||||
// There is no amount that can pass through both channel 5 and 4.
|
||||
hops = []route.Vertex{
|
||||
ctx.aliases["e"], ctx.aliases["c"],
|
||||
}
|
||||
_, err = ctx.router.BuildRoute(
|
||||
nil, hops, nil, 40,
|
||||
)
|
||||
errNoChannel, ok := err.(ErrNoChannel)
|
||||
if !ok {
|
||||
t.Fatalf("expected incompatible policies error, but got %v",
|
||||
err)
|
||||
}
|
||||
if errNoChannel.position != 0 {
|
||||
t.Fatalf("unexpected no channel error position")
|
||||
}
|
||||
if errNoChannel.fromNode != ctx.aliases["a"] {
|
||||
t.Fatalf("unexpected no channel error node")
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user