From f60e4b1e14547a76747a012cff663e828c9da313 Mon Sep 17 00:00:00 2001 From: Joost Jager Date: Wed, 12 Jun 2019 12:18:58 +0200 Subject: [PATCH] lnwire+htlcswitch: report height for invalid payment details failure Extends the invalid payment details failure with the new accept height field. This allows sender to distinguish between a genuine invalid details situation and a delay caused by intermediate nodes. --- htlcswitch/link.go | 4 +- htlcswitch/switch_test.go | 2 +- lnrpc/routerrpc/router.pb.go | 226 ++++++++++++++------------ lnrpc/routerrpc/router.proto | 3 + lnrpc/routerrpc/router_server.go | 1 + lnwire/onion_error.go | 31 +++- lnwire/onion_error_test.go | 59 ++++++- routing/missioncontrol_store_test.go | 2 +- routing/result_interpretation_test.go | 2 +- 9 files changed, 212 insertions(+), 118 deletions(-) diff --git a/htlcswitch/link.go b/htlcswitch/link.go index 2f790ba28..c904aa3e2 100644 --- a/htlcswitch/link.go +++ b/htlcswitch/link.go @@ -1206,7 +1206,7 @@ func (l *channelLink) processHodlEvent(hodlEvent invoices.HodlEvent, // In case of a cancel, always return // incorrect_or_unknown_payment_details in order to avoid leaking info. failure := lnwire.NewFailIncorrectDetails( - htlc.pd.Amount, + htlc.pd.Amount, uint32(hodlEvent.AcceptHeight), ) l.sendHTLCError( @@ -2867,7 +2867,7 @@ func (l *channelLink) processExitHop(pd *lnwallet.PaymentDescriptor, // Cancel htlc if we don't have an invoice for it. case channeldb.ErrInvoiceNotFound: - failure := lnwire.NewFailIncorrectDetails(pd.Amount) + failure := lnwire.NewFailIncorrectDetails(pd.Amount, heightNow) l.sendHTLCError(pd.HtlcIndex, failure, obfuscator, pd.SourceRef) return true, nil diff --git a/htlcswitch/switch_test.go b/htlcswitch/switch_test.go index 59f6fae9a..b0a53eb3a 100644 --- a/htlcswitch/switch_test.go +++ b/htlcswitch/switch_test.go @@ -1803,7 +1803,7 @@ func TestSwitchSendPayment(t *testing.T) { // the add htlc request with error and sent the htlc fail request // back. This request should be forwarded back to alice channel link. obfuscator := NewMockObfuscator() - failure := lnwire.NewFailIncorrectDetails(update.Amount) + failure := lnwire.NewFailIncorrectDetails(update.Amount, 100) reason, err := obfuscator.EncryptFirstHop(failure) if err != nil { t.Fatalf("unable obfuscate failure: %v", err) diff --git a/lnrpc/routerrpc/router.pb.go b/lnrpc/routerrpc/router.pb.go index 86a69c2ca..fdb45dfb2 100644 --- a/lnrpc/routerrpc/router.pb.go +++ b/lnrpc/routerrpc/router.pb.go @@ -646,7 +646,9 @@ type Failure struct { //* //The position in the path of the intermediate or final node that generated //the failure message. Position zero is the sender node. - FailureSourceIndex uint32 `protobuf:"varint,8,opt,name=failure_source_index,json=failureSourceIndex,proto3" json:"failure_source_index,omitempty"` + FailureSourceIndex uint32 `protobuf:"varint,8,opt,name=failure_source_index,json=failureSourceIndex,proto3" json:"failure_source_index,omitempty"` + /// A failure type-dependent block height. + Height uint32 `protobuf:"varint,9,opt,name=height,proto3" json:"height,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` @@ -726,6 +728,13 @@ func (m *Failure) GetFailureSourceIndex() uint32 { return 0 } +func (m *Failure) GetHeight() uint32 { + if m != nil { + return m.Height + } + return 0 +} + type ChannelUpdate struct { //* //The signature that validates the announced data and proves the ownership @@ -1212,117 +1221,118 @@ func init() { func init() { proto.RegisterFile("routerrpc/router.proto", fileDescriptor_7a0613f69d37b0a5) } var 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0x7f, 0xce, 0x40, 0x39, 0xe5, 0x44, 0x0a, 0xea, 0x74, 0x76, 0x95, 0x34, + 0x32, 0x15, 0x12, 0x8f, 0xd0, 0x73, 0xd8, 0xf2, 0x58, 0x24, 0xa8, 0xd4, 0x60, 0x2a, 0x53, 0x1a, + 0x3f, 0xbc, 0x2b, 0x28, 0x3a, 0x05, 0x14, 0x88, 0x31, 0x0f, 0x69, 0x34, 0x1b, 0x0e, 0x79, 0x14, + 0xd1, 0x69, 0x18, 0x5c, 0xa9, 0x3b, 0xb9, 0x41, 0xd6, 0x58, 0x5e, 0xe7, 0x8a, 0x39, 0x23, 0x5f, + 0xff, 0x77, 0x06, 0xca, 0xa9, 0xcd, 0xc9, 0x5b, 0x2b, 0x0f, 0x43, 0xaf, 0xc3, 0x60, 0x92, 0xd4, + 0xc2, 0x1c, 0x40, 0x26, 0x14, 0xd4, 0x40, 0x04, 0x71, 0x21, 0x24, 0xc3, 0xe5, 0xdb, 0x9e, 0x55, + 0x1b, 0x4c, 0xdd, 0xf6, 0x73, 0xd8, 0x9b, 0xb8, 0x3e, 0x9d, 0x72, 0x9f, 0x79, 0xee, 0x1f, 0x39, + 0x4d, 0x3a, 0x94, 0x9c, 0x22, 0xae, 0xb5, 0xa1, 0x3a, 0x54, 0x96, 0x4e, 0x92, 0x57, 0x27, 0x59, + 0xc2, 0xd0, 0x4b, 0x38, 0x50, 0x51, 0x60, 0x42, 0xf0, 0xc9, 0x54, 0x24, 0x07, 0xbc, 0x9e, 0x79, + 0xaa, 0x06, 0x8a, 0xe4, 0x31, 0xf3, 0x8b, 0xbf, 0x66, 0xa0, 0x92, 0xee, 0xd2, 0x50, 0x15, 0x4a, + 0x96, 0x4d, 0xdb, 0x1d, 0xeb, 0x87, 0x8b, 0xbe, 0xf1, 0x89, 0x1c, 0xf6, 0x06, 0xcd, 0x26, 0xc6, + 0x2d, 0xdc, 0x32, 0x32, 0x08, 0xc1, 0x96, 0x14, 0x12, 0xdc, 0xa2, 0x7d, 0xab, 0x8b, 0x9d, 0x81, + 0x7c, 0x83, 0x76, 0x61, 0x3b, 0xc6, 0x6c, 0x87, 0x12, 0x67, 0xd0, 0xc7, 0x46, 0x16, 0x19, 0x50, + 0x89, 0x41, 0x4c, 0x88, 0x43, 0x8c, 0x9c, 0x14, 0xce, 0x18, 0x79, 0xf8, 0x9e, 0x25, 0xcf, 0x5d, + 0xfe, 0xfc, 0x2f, 0x39, 0xd8, 0x54, 0x5d, 0x4d, 0x88, 0x2e, 0xa0, 0x9c, 0x6a, 0x85, 0xd1, 0xd1, + 0x47, 0x5b, 0xe4, 0x9a, 0xb9, 0xbe, 0xed, 0x9c, 0x45, 0xdf, 0x64, 0xd0, 0x6b, 0xa8, 0xa4, 0x9b, + 0x5d, 0x94, 0x6e, 0x62, 0xd6, 0x74, 0xc1, 0x1f, 0xf5, 0xf5, 0x06, 0x0c, 0x1c, 0x09, 0x77, 0x22, + 0x9b, 0x96, 0xb8, 0x8d, 0x44, 0xb5, 0x14, 0x7f, 0xa5, 0x37, 0xad, 0x1d, 0xae, 0xb5, 0xc5, 0x75, + 0xd5, 0xd1, 0x47, 0x8c, 0x1b, 0xb9, 0x07, 0x47, 0x5c, 0xee, 0x1e, 0x6b, 0x9f, 0x3e, 0x66, 0x8e, + 0xbd, 0x8d, 0x60, 0x77, 0x8d, 0x02, 0xa0, 0x5f, 0xa4, 0x77, 0xf0, 0xa8, 0x7e, 0xd4, 0x9e, 0xff, + 0x2f, 0xda, 0x62, 0x95, 0x35, 0x52, 0xb1, 0xb4, 0xca, 0xe3, 0x42, 0xb3, 0xb4, 0xca, 0x47, 0x14, + 0xe7, 0xd5, 0xaf, 0x7e, 0x77, 0x76, 0xe3, 0x8a, 0xf1, 0xec, 0xea, 0x74, 0x18, 0x4c, 0xce, 0x3c, + 0xd9, 0x52, 0xf9, 0xae, 0x7f, 0xe3, 0x73, 0xf1, 0x87, 0x20, 0xbc, 0x3d, 0xf3, 0xfc, 0xd1, 0x99, + 0x6a, 0x8c, 0xcf, 0xe6, 0xee, 0xae, 0x36, 0xd5, 0x3f, 0xdb, 0x5f, 0xff, 0x37, 0x00, 0x00, 0xff, + 0xff, 0x3c, 0xe4, 0x5c, 0x67, 0x09, 0x0f, 0x00, 0x00, } // Reference imports to suppress errors if they are not otherwise used. diff --git a/lnrpc/routerrpc/router.proto b/lnrpc/routerrpc/router.proto index d09b6867b..7299a02b7 100644 --- a/lnrpc/routerrpc/router.proto +++ b/lnrpc/routerrpc/router.proto @@ -239,6 +239,9 @@ message Failure { the failure message. Position zero is the sender node. **/ uint32 failure_source_index = 8; + + /// A failure type-dependent block height. + uint32 height = 9; } diff --git a/lnrpc/routerrpc/router_server.go b/lnrpc/routerrpc/router_server.go index f2fe0c686..cea63be98 100644 --- a/lnrpc/routerrpc/router_server.go +++ b/lnrpc/routerrpc/router_server.go @@ -324,6 +324,7 @@ func marshallError(sendError error) (*Failure, error) { case *lnwire.FailIncorrectDetails: response.Code = Failure_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS + response.Height = onionErr.Height() case *lnwire.FailIncorrectPaymentAmount: response.Code = Failure_INCORRECT_PAYMENT_AMOUNT diff --git a/lnwire/onion_error.go b/lnwire/onion_error.go index 51f3bc581..43a3d3266 100644 --- a/lnwire/onion_error.go +++ b/lnwire/onion_error.go @@ -333,13 +333,19 @@ func (f *FailIncorrectPaymentAmount) Error() string { type FailIncorrectDetails struct { // amount is the value of the extended HTLC. amount MilliSatoshi + + // height is the block height when the htlc was received. + height uint32 } // NewFailIncorrectDetails makes a new instance of the FailIncorrectDetails -// error bound to the specified HTLC amount. -func NewFailIncorrectDetails(amt MilliSatoshi) *FailIncorrectDetails { +// error bound to the specified HTLC amount and acceptance height. +func NewFailIncorrectDetails(amt MilliSatoshi, + height uint32) *FailIncorrectDetails { + return &FailIncorrectDetails{ amount: amt, + height: height, } } @@ -348,6 +354,11 @@ func (f *FailIncorrectDetails) Amount() MilliSatoshi { return f.amount } +// Height is the block height when the htlc was received. +func (f *FailIncorrectDetails) Height() uint32 { + return f.height +} + // Code returns the failure unique code. // // NOTE: Part of the FailureMessage interface. @@ -360,7 +371,8 @@ func (f *FailIncorrectDetails) Code() FailCode { // NOTE: Implements the error interface. func (f *FailIncorrectDetails) Error() string { return fmt.Sprintf( - "%v(amt=%v)", CodeIncorrectOrUnknownPaymentDetails, f.amount, + "%v(amt=%v, height=%v)", CodeIncorrectOrUnknownPaymentDetails, + f.amount, f.height, ) } @@ -381,6 +393,17 @@ func (f *FailIncorrectDetails) Decode(r io.Reader, pver uint32) error { return err } + // At a later stage, the height field was also tacked on. We need to + // check for io.EOF here as well. + err = ReadElement(r, &f.height) + switch { + case err == io.EOF: + return nil + + case err != nil: + return err + } + return nil } @@ -388,7 +411,7 @@ func (f *FailIncorrectDetails) Decode(r io.Reader, pver uint32) error { // // NOTE: Part of the Serializable interface. func (f *FailIncorrectDetails) Encode(w io.Writer, pver uint32) error { - return WriteElement(w, f.amount) + return WriteElements(w, f.amount, f.height) } // FailFinalExpiryTooSoon is returned if the cltv_expiry is too low, the final diff --git a/lnwire/onion_error_test.go b/lnwire/onion_error_test.go index a29d3ee24..8420be1f7 100644 --- a/lnwire/onion_error_test.go +++ b/lnwire/onion_error_test.go @@ -37,7 +37,7 @@ var onionFailures = []FailureMessage{ &FailIncorrectPaymentAmount{}, &FailFinalExpiryTooSoon{}, - NewFailIncorrectDetails(99), + NewFailIncorrectDetails(99, 100), NewInvalidOnionVersion(testOnionHash), NewInvalidOnionHmac(testOnionHash), NewInvalidOnionKey(testOnionHash), @@ -196,6 +196,9 @@ func TestFailIncorrectDetailsOptionalAmount(t *testing.T) { if invalidDetailsErr.amount != 0 { t.Fatalf("expected amount to be zero") } + if invalidDetailsErr.height != 0 { + t.Fatalf("height incorrect") + } } type mockFailIncorrectDetailsNoAmt struct { @@ -216,3 +219,57 @@ func (f *mockFailIncorrectDetailsNoAmt) Decode(r io.Reader, pver uint32) error { func (f *mockFailIncorrectDetailsNoAmt) Encode(w io.Writer, pver uint32) error { return nil } + +// TestFailIncorrectDetailsOptionalHeight tests that we're able to decode an +// FailIncorrectDetails error that doesn't have the optional height. This +// ensures we're able to decode FailIncorrectDetails messages from older nodes. +func TestFailIncorrectDetailsOptionalHeight(t *testing.T) { + t.Parallel() + + onionError := &mockFailIncorrectDetailsNoHeight{ + amount: uint64(123), + } + + var b bytes.Buffer + if err := EncodeFailure(&b, onionError, 0); err != nil { + t.Fatalf("unable to encode failure: %v", err) + } + + onionError2, err := DecodeFailure(bytes.NewReader(b.Bytes()), 0) + if err != nil { + t.Fatalf("unable to decode error: %v", err) + } + + invalidDetailsErr, ok := onionError2.(*FailIncorrectDetails) + if !ok { + t.Fatalf("expected FailIncorrectDetails, but got %T", + onionError2) + } + + if invalidDetailsErr.amount != 123 { + t.Fatalf("amount incorrect") + } + if invalidDetailsErr.height != 0 { + t.Fatalf("height incorrect") + } +} + +type mockFailIncorrectDetailsNoHeight struct { + amount uint64 +} + +func (f *mockFailIncorrectDetailsNoHeight) Code() FailCode { + return CodeIncorrectOrUnknownPaymentDetails +} + +func (f *mockFailIncorrectDetailsNoHeight) Error() string { + return "" +} + +func (f *mockFailIncorrectDetailsNoHeight) Decode(r io.Reader, pver uint32) error { + return nil +} + +func (f *mockFailIncorrectDetailsNoHeight) Encode(w io.Writer, pver uint32) error { + return WriteElement(w, f.amount) +} diff --git a/routing/missioncontrol_store_test.go b/routing/missioncontrol_store_test.go index 86111d0bd..9d070f4de 100644 --- a/routing/missioncontrol_store_test.go +++ b/routing/missioncontrol_store_test.go @@ -61,7 +61,7 @@ func TestMissionControlStore(t *testing.T) { result1 := paymentResult{ route: &testRoute, - failure: lnwire.NewFailIncorrectDetails(100), + failure: lnwire.NewFailIncorrectDetails(100, 1000), failureSourceIdx: &failureSourceIdx, id: 99, timeReply: testTime, diff --git a/routing/result_interpretation_test.go b/routing/result_interpretation_test.go index 7d95ad641..8c4498b06 100644 --- a/routing/result_interpretation_test.go +++ b/routing/result_interpretation_test.go @@ -103,7 +103,7 @@ var resultTestCases = []resultTestCase{ name: "fail incorrect details", route: &routeTwoHop, failureSrcIdx: 2, - failure: lnwire.NewFailIncorrectDetails(97), + failure: lnwire.NewFailIncorrectDetails(97, 0), expectedResult: &interpretedResult{ pairResults: map[DirectedNodePair]pairResult{