lnd.xprv/lnwire/onion_error_test.go

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package lnwire
import (
"bufio"
"bytes"
"encoding/binary"
"reflect"
"testing"
"github.com/davecgh/go-spew/spew"
)
var (
testOnionHash = []byte{}
testAmount = MilliSatoshi(1)
testCtlvExpiry = uint32(2)
testFlags = uint16(2)
sig, _ = NewSigFromSignature(testSig)
testChannelUpdate = ChannelUpdate{
Signature: sig,
ShortChannelID: NewShortChanIDFromInt(1),
Timestamp: 1,
MessageFlags: 0,
ChannelFlags: 1,
}
)
var onionFailures = []FailureMessage{
&FailInvalidRealm{},
&FailTemporaryNodeFailure{},
&FailPermanentNodeFailure{},
&FailRequiredNodeFeatureMissing{},
&FailPermanentChannelFailure{},
&FailRequiredChannelFeatureMissing{},
&FailUnknownNextPeer{},
&FailIncorrectPaymentAmount{},
&FailFinalExpiryTooSoon{},
NewFailUnknownPaymentHash(99),
NewInvalidOnionVersion(testOnionHash),
NewInvalidOnionHmac(testOnionHash),
NewInvalidOnionKey(testOnionHash),
NewTemporaryChannelFailure(&testChannelUpdate),
NewTemporaryChannelFailure(nil),
NewAmountBelowMinimum(testAmount, testChannelUpdate),
NewFeeInsufficient(testAmount, testChannelUpdate),
NewIncorrectCltvExpiry(testCtlvExpiry, testChannelUpdate),
NewExpiryTooSoon(testChannelUpdate),
NewChannelDisabled(testFlags, testChannelUpdate),
NewFinalIncorrectCltvExpiry(testCtlvExpiry),
NewFinalIncorrectHtlcAmount(testAmount),
}
// TestEncodeDecodeCode tests the ability of onion errors to be properly encoded
// and decoded.
func TestEncodeDecodeCode(t *testing.T) {
for _, failure1 := range onionFailures {
var b bytes.Buffer
if err := EncodeFailure(&b, failure1, 0); err != nil {
t.Fatalf("unable to encode failure code(%v): %v",
failure1.Code(), err)
}
failure2, err := DecodeFailure(&b, 0)
if err != nil {
t.Fatalf("unable to decode failure code(%v): %v",
failure1.Code(), err)
}
if !reflect.DeepEqual(failure1, failure2) {
t.Fatalf("expected %v, got %v", spew.Sdump(failure1),
spew.Sdump(failure2))
}
}
}
// TestChannelUpdateCompatabilityParsing tests that we're able to properly read
// out channel update messages encoded in an onion error payload that was
// written in the legacy (type prefixed) format.
func TestChannelUpdateCompatabilityParsing(t *testing.T) {
t.Parallel()
// We'll start by taking out test channel update, and encoding it into
// a set of raw bytes.
var b bytes.Buffer
if err := testChannelUpdate.Encode(&b, 0); err != nil {
t.Fatalf("unable to encode chan update: %v", err)
}
// Now that we have the set of bytes encoded, we'll ensure that we're
// able to decode it using our compatibility method, as it's a regular
// encoded channel update message.
var newChanUpdate ChannelUpdate
err := parseChannelUpdateCompatabilityMode(
bufio.NewReader(&b), &newChanUpdate, 0,
)
if err != nil {
t.Fatalf("unable to parse channel update: %v", err)
}
// At this point, we'll ensure that we get the exact same failure out
// on the other side.
if !reflect.DeepEqual(testChannelUpdate, newChanUpdate) {
t.Fatalf("mismatched channel updates: %v", err)
}
// We'll now reset then re-encoded the same channel update to try it in
// the proper compatible mode.
b.Reset()
// Before we encode the update itself, we'll also write out the 2-byte
// type in order to simulate the compat mode.
var tByte [2]byte
binary.BigEndian.PutUint16(tByte[:], MsgChannelUpdate)
b.Write(tByte[:])
if err := testChannelUpdate.Encode(&b, 0); err != nil {
t.Fatalf("unable to encode chan update: %v", err)
}
// We should be able to properly parse the encoded channel update
// message even with the extra two bytes.
var newChanUpdate2 ChannelUpdate
err = parseChannelUpdateCompatabilityMode(
bufio.NewReader(&b), &newChanUpdate2, 0,
)
if err != nil {
t.Fatalf("unable to parse channel update: %v", err)
}
if !reflect.DeepEqual(newChanUpdate2, newChanUpdate) {
t.Fatalf("mismatched channel updates: %v", err)
}
}
// TestWriteOnionErrorChanUpdate tests that we write an exact size for the
// channel update in order to be more compliant with the parsers of other
// implementations.
func TestWriteOnionErrorChanUpdate(t *testing.T) {
t.Parallel()
// First, we'll write out the raw channel update so we can obtain the
// raw serialized length.
var b bytes.Buffer
update := testChannelUpdate
if err := update.Encode(&b, 0); err != nil {
t.Fatalf("unable to write update: %v", err)
}
trueUpdateLength := b.Len()
// Next, we'll use the function to encode the update as we would in a
// onion error message.
var errorBuf bytes.Buffer
err := writeOnionErrorChanUpdate(&errorBuf, &update, 0)
if err != nil {
t.Fatalf("unable to encode onion error: %v", err)
}
// Finally, read the length encoded and ensure that it matches the raw
// length.
var encodedLen uint16
if err := ReadElement(&errorBuf, &encodedLen); err != nil {
t.Fatalf("unable to read len: %v", err)
}
if uint16(trueUpdateLength) != encodedLen {
t.Fatalf("wrong length written: expected %v, got %v",
trueUpdateLength, encodedLen)
}
}
// TestFailUnknownPaymentHashOptionalAmount tests that we're able to decode an
// UnknownPaymentHash error that doesn't have the optional amount. This ensures
// we're able to decode FailUnknownPaymentHash messages from older nodes.
func TestFailUnknownPaymentHashOptionalAmount(t *testing.T) {
t.Parallel()
// Creation an error that is a non-pointer will allow us to skip the
// type assertion for the Serializable interface. As a result, the
// amount body won't be written.
onionError := FailUnknownPaymentHash{}
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)
}
if !reflect.DeepEqual(onionError, onionError) {
t.Fatalf("expected %v, got %v", spew.Sdump(onionError),
spew.Sdump(onionError2))
}
}