lnd.xprv/channeldb/payment_control_test.go
2020-05-22 11:26:25 +02:00

913 lines
23 KiB
Go

package channeldb
import (
"crypto/rand"
"crypto/sha256"
"fmt"
"io"
"reflect"
"testing"
"time"
"github.com/davecgh/go-spew/spew"
"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/record"
)
func genPreimage() ([32]byte, error) {
var preimage [32]byte
if _, err := io.ReadFull(rand.Reader, preimage[:]); err != nil {
return preimage, err
}
return preimage, nil
}
func genInfo() (*PaymentCreationInfo, *HTLCAttemptInfo,
lntypes.Preimage, error) {
preimage, err := genPreimage()
if err != nil {
return nil, nil, preimage, fmt.Errorf("unable to "+
"generate preimage: %v", err)
}
rhash := sha256.Sum256(preimage[:])
return &PaymentCreationInfo{
PaymentHash: rhash,
Value: testRoute.ReceiverAmt(),
CreationTime: time.Unix(time.Now().Unix(), 0),
PaymentRequest: []byte("hola"),
},
&HTLCAttemptInfo{
AttemptID: 0,
SessionKey: priv,
Route: *testRoute.Copy(),
}, preimage, nil
}
// TestPaymentControlSwitchFail checks that payment status returns to Failed
// status after failing, and that InitPayment allows another HTLC for the
// same payment hash.
func TestPaymentControlSwitchFail(t *testing.T) {
t.Parallel()
db, cleanup, err := makeTestDB()
defer cleanup()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, attempt, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Sends base htlc message which initiate StatusInFlight.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, nil,
)
// Fail the payment, which should moved it to Failed.
failReason := FailureReasonNoRoute
_, err = pControl.Fail(info.PaymentHash, failReason)
if err != nil {
t.Fatalf("unable to fail payment hash: %v", err)
}
// Verify the status is indeed Failed.
assertPaymentStatus(t, pControl, info.PaymentHash, StatusFailed)
assertPaymentInfo(
t, pControl, info.PaymentHash, info, &failReason, nil,
)
// Sends the htlc again, which should succeed since the prior payment
// failed.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, nil,
)
// Record a new attempt. In this test scenario, the attempt fails.
// However, this is not communicated to control tower in the current
// implementation. It only registers the initiation of the attempt.
_, err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to register attempt: %v", err)
}
htlcReason := HTLCFailUnreadable
_, err = pControl.FailAttempt(
info.PaymentHash, attempt.AttemptID,
&HTLCFailInfo{
Reason: htlcReason,
},
)
if err != nil {
t.Fatal(err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
htlc := &htlcStatus{
HTLCAttemptInfo: attempt,
failure: &htlcReason,
}
assertPaymentInfo(t, pControl, info.PaymentHash, info, nil, htlc)
// Record another attempt.
attempt.AttemptID = 1
_, err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
htlc = &htlcStatus{
HTLCAttemptInfo: attempt,
}
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
// Settle the attempt and verify that status was changed to
// StatusSucceeded.
var payment *MPPayment
payment, err = pControl.SettleAttempt(
info.PaymentHash, attempt.AttemptID,
&HTLCSettleInfo{
Preimage: preimg,
},
)
if err != nil {
t.Fatalf("error shouldn't have been received, got: %v", err)
}
if len(payment.HTLCs) != 2 {
t.Fatalf("payment should have two htlcs, got: %d",
len(payment.HTLCs))
}
err = assertRouteEqual(&payment.HTLCs[0].Route, &attempt.Route)
if err != nil {
t.Fatalf("unexpected route returned: %v vs %v: %v",
spew.Sdump(attempt.Route),
spew.Sdump(payment.HTLCs[0].Route), err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusSucceeded)
htlc.settle = &preimg
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
// Attempt a final payment, which should now fail since the prior
// payment succeed.
err = pControl.InitPayment(info.PaymentHash, info)
if err != ErrAlreadyPaid {
t.Fatalf("unable to send htlc message: %v", err)
}
}
// TestPaymentControlSwitchDoubleSend checks the ability of payment control to
// prevent double sending of htlc message, when message is in StatusInFlight.
func TestPaymentControlSwitchDoubleSend(t *testing.T) {
t.Parallel()
db, cleanup, err := makeTestDB()
defer cleanup()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, attempt, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Sends base htlc message which initiate base status and move it to
// StatusInFlight and verifies that it was changed.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, nil,
)
// Try to initiate double sending of htlc message with the same
// payment hash, should result in error indicating that payment has
// already been sent.
err = pControl.InitPayment(info.PaymentHash, info)
if err != ErrPaymentInFlight {
t.Fatalf("payment control wrong behaviour: " +
"double sending must trigger ErrPaymentInFlight error")
}
// Record an attempt.
_, err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
htlc := &htlcStatus{
HTLCAttemptInfo: attempt,
}
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
// Sends base htlc message which initiate StatusInFlight.
err = pControl.InitPayment(info.PaymentHash, info)
if err != ErrPaymentInFlight {
t.Fatalf("payment control wrong behaviour: " +
"double sending must trigger ErrPaymentInFlight error")
}
// After settling, the error should be ErrAlreadyPaid.
_, err = pControl.SettleAttempt(
info.PaymentHash, attempt.AttemptID,
&HTLCSettleInfo{
Preimage: preimg,
},
)
if err != nil {
t.Fatalf("error shouldn't have been received, got: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusSucceeded)
htlc.settle = &preimg
assertPaymentInfo(t, pControl, info.PaymentHash, info, nil, htlc)
err = pControl.InitPayment(info.PaymentHash, info)
if err != ErrAlreadyPaid {
t.Fatalf("unable to send htlc message: %v", err)
}
}
// TestPaymentControlSuccessesWithoutInFlight checks that the payment
// control will disallow calls to Success when no payment is in flight.
func TestPaymentControlSuccessesWithoutInFlight(t *testing.T) {
t.Parallel()
db, cleanup, err := makeTestDB()
defer cleanup()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, _, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Attempt to complete the payment should fail.
_, err = pControl.SettleAttempt(
info.PaymentHash, 0,
&HTLCSettleInfo{
Preimage: preimg,
},
)
if err != ErrPaymentNotInitiated {
t.Fatalf("expected ErrPaymentNotInitiated, got %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusUnknown)
}
// TestPaymentControlFailsWithoutInFlight checks that a strict payment
// control will disallow calls to Fail when no payment is in flight.
func TestPaymentControlFailsWithoutInFlight(t *testing.T) {
t.Parallel()
db, cleanup, err := makeTestDB()
defer cleanup()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, _, _, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Calling Fail should return an error.
_, err = pControl.Fail(info.PaymentHash, FailureReasonNoRoute)
if err != ErrPaymentNotInitiated {
t.Fatalf("expected ErrPaymentNotInitiated, got %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusUnknown)
}
// TestPaymentControlDeleteNonInFlight checks that calling DeletaPayments only
// deletes payments from the database that are not in-flight.
func TestPaymentControlDeleteNonInFligt(t *testing.T) {
t.Parallel()
db, cleanup, err := makeTestDB()
defer cleanup()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
payments := []struct {
failed bool
success bool
}{
{
failed: true,
success: false,
},
{
failed: false,
success: true,
},
{
failed: false,
success: false,
},
}
for _, p := range payments {
info, attempt, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Sends base htlc message which initiate StatusInFlight.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
_, err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
htlc := &htlcStatus{
HTLCAttemptInfo: attempt,
}
if p.failed {
// Fail the payment attempt.
htlcFailure := HTLCFailUnreadable
_, err := pControl.FailAttempt(
info.PaymentHash, attempt.AttemptID,
&HTLCFailInfo{
Reason: htlcFailure,
},
)
if err != nil {
t.Fatalf("unable to fail htlc: %v", err)
}
// Fail the payment, which should moved it to Failed.
failReason := FailureReasonNoRoute
_, err = pControl.Fail(info.PaymentHash, failReason)
if err != nil {
t.Fatalf("unable to fail payment hash: %v", err)
}
// Verify the status is indeed Failed.
assertPaymentStatus(t, pControl, info.PaymentHash, StatusFailed)
htlc.failure = &htlcFailure
assertPaymentInfo(
t, pControl, info.PaymentHash, info,
&failReason, htlc,
)
} else if p.success {
// Verifies that status was changed to StatusSucceeded.
_, err := pControl.SettleAttempt(
info.PaymentHash, attempt.AttemptID,
&HTLCSettleInfo{
Preimage: preimg,
},
)
if err != nil {
t.Fatalf("error shouldn't have been received, got: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusSucceeded)
htlc.settle = &preimg
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
} else {
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
}
}
// Delete payments.
if err := db.DeletePayments(); err != nil {
t.Fatal(err)
}
// This should leave the in-flight payment.
dbPayments, err := db.FetchPayments()
if err != nil {
t.Fatal(err)
}
if len(dbPayments) != 1 {
t.Fatalf("expected one payment, got %d", len(dbPayments))
}
status := dbPayments[0].Status
if status != StatusInFlight {
t.Fatalf("expected in-fligth status, got %v", status)
}
}
// TestPaymentControlMultiShard checks the ability of payment control to
// have multiple in-flight HTLCs for a single payment.
func TestPaymentControlMultiShard(t *testing.T) {
t.Parallel()
// We will register three HTLC attempts, and always fail the second
// one. We'll generate all combinations of settling/failing the first
// and third HTLC, and assert that the payment status end up as we
// expect.
type testCase struct {
settleFirst bool
settleLast bool
}
var tests []testCase
for _, f := range []bool{true, false} {
for _, l := range []bool{true, false} {
tests = append(tests, testCase{f, l})
}
}
runSubTest := func(t *testing.T, test testCase) {
db, cleanup, err := makeTestDB()
defer cleanup()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, attempt, preimg, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Init the payment, moving it to the StatusInFlight state.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, nil,
)
// Create three unique attempts we'll use for the test, and
// register them with the payment control. We set each
// attempts's value to one third of the payment amount, and
// populate the MPP options.
shardAmt := info.Value / 3
attempt.Route.FinalHop().AmtToForward = shardAmt
attempt.Route.FinalHop().MPP = record.NewMPP(
info.Value, [32]byte{1},
)
var attempts []*HTLCAttemptInfo
for i := uint64(0); i < 3; i++ {
a := *attempt
a.AttemptID = i
attempts = append(attempts, &a)
_, err = pControl.RegisterAttempt(info.PaymentHash, &a)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
assertPaymentStatus(
t, pControl, info.PaymentHash, StatusInFlight,
)
htlc := &htlcStatus{
HTLCAttemptInfo: &a,
}
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
}
// For a fourth attempt, check that attempting to
// register it will fail since the total sent amount
// will be too large.
b := *attempt
b.AttemptID = 3
_, err = pControl.RegisterAttempt(info.PaymentHash, &b)
if err != ErrValueExceedsAmt {
t.Fatalf("expected ErrValueExceedsAmt, got: %v",
err)
}
// Fail the second attempt.
a := attempts[1]
htlcFail := HTLCFailUnreadable
_, err = pControl.FailAttempt(
info.PaymentHash, a.AttemptID,
&HTLCFailInfo{
Reason: htlcFail,
},
)
if err != nil {
t.Fatal(err)
}
htlc := &htlcStatus{
HTLCAttemptInfo: a,
failure: &htlcFail,
}
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
// Payment should still be in-flight.
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
// Depending on the test case, settle or fail the first attempt.
a = attempts[0]
htlc = &htlcStatus{
HTLCAttemptInfo: a,
}
var firstFailReason *FailureReason
if test.settleFirst {
_, err := pControl.SettleAttempt(
info.PaymentHash, a.AttemptID,
&HTLCSettleInfo{
Preimage: preimg,
},
)
if err != nil {
t.Fatalf("error shouldn't have been "+
"received, got: %v", err)
}
// Assert that the HTLC has had the preimage recorded.
htlc.settle = &preimg
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
} else {
_, err := pControl.FailAttempt(
info.PaymentHash, a.AttemptID,
&HTLCFailInfo{
Reason: htlcFail,
},
)
if err != nil {
t.Fatalf("error shouldn't have been "+
"received, got: %v", err)
}
// Assert the failure was recorded.
htlc.failure = &htlcFail
assertPaymentInfo(
t, pControl, info.PaymentHash, info, nil, htlc,
)
// We also record a payment level fail, to move it into
// a terminal state.
failReason := FailureReasonNoRoute
_, err = pControl.Fail(info.PaymentHash, failReason)
if err != nil {
t.Fatalf("unable to fail payment hash: %v", err)
}
// Record the reason we failed the payment, such that
// we can assert this later in the test.
firstFailReason = &failReason
}
// The payment should still be considered in-flight, since there
// is still an active HTLC.
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
// Try to register yet another attempt. This should fail now
// that the payment has reached a terminal condition.
b = *attempt
b.AttemptID = 3
_, err = pControl.RegisterAttempt(info.PaymentHash, &b)
if err != ErrPaymentTerminal {
t.Fatalf("expected ErrPaymentTerminal, got: %v", err)
}
assertPaymentStatus(t, pControl, info.PaymentHash, StatusInFlight)
// Settle or fail the remaining attempt based on the testcase.
a = attempts[2]
htlc = &htlcStatus{
HTLCAttemptInfo: a,
}
if test.settleLast {
// Settle the last outstanding attempt.
_, err = pControl.SettleAttempt(
info.PaymentHash, a.AttemptID,
&HTLCSettleInfo{
Preimage: preimg,
},
)
if err != nil {
t.Fatalf("error shouldn't have been "+
"received, got: %v", err)
}
htlc.settle = &preimg
assertPaymentInfo(
t, pControl, info.PaymentHash, info,
firstFailReason, htlc,
)
} else {
// Fail the attempt.
_, err := pControl.FailAttempt(
info.PaymentHash, a.AttemptID,
&HTLCFailInfo{
Reason: htlcFail,
},
)
if err != nil {
t.Fatalf("error shouldn't have been "+
"received, got: %v", err)
}
// Assert the failure was recorded.
htlc.failure = &htlcFail
assertPaymentInfo(
t, pControl, info.PaymentHash, info,
firstFailReason, htlc,
)
// Check that we can override any perevious terminal
// failure. This is to allow multiple concurrent shard
// write a terminal failure to the database without
// syncing.
failReason := FailureReasonPaymentDetails
_, err = pControl.Fail(info.PaymentHash, failReason)
if err != nil {
t.Fatalf("unable to fail payment hash: %v", err)
}
}
// If any of the two attempts settled, the payment should end
// up in the Succeeded state. If both failed the payment should
// also be Failed at this poinnt.
finalStatus := StatusFailed
expRegErr := ErrPaymentAlreadyFailed
if test.settleFirst || test.settleLast {
finalStatus = StatusSucceeded
expRegErr = ErrPaymentAlreadySucceeded
}
assertPaymentStatus(t, pControl, info.PaymentHash, finalStatus)
// Finally assert we cannot register more attempts.
_, err = pControl.RegisterAttempt(info.PaymentHash, &b)
if err != expRegErr {
t.Fatalf("expected error %v, got: %v", expRegErr, err)
}
}
for _, test := range tests {
test := test
subTest := fmt.Sprintf("first=%v, second=%v",
test.settleFirst, test.settleLast)
t.Run(subTest, func(t *testing.T) {
runSubTest(t, test)
})
}
}
func TestPaymentControlMPPRecordValidation(t *testing.T) {
t.Parallel()
db, cleanup, err := makeTestDB()
defer cleanup()
if err != nil {
t.Fatalf("unable to init db: %v", err)
}
pControl := NewPaymentControl(db)
info, attempt, _, err := genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
// Init the payment.
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
// Create three unique attempts we'll use for the test, and
// register them with the payment control. We set each
// attempts's value to one third of the payment amount, and
// populate the MPP options.
shardAmt := info.Value / 3
attempt.Route.FinalHop().AmtToForward = shardAmt
attempt.Route.FinalHop().MPP = record.NewMPP(
info.Value, [32]byte{1},
)
_, err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
// Now try to register a non-MPP attempt, which should fail.
b := *attempt
b.AttemptID = 1
b.Route.FinalHop().MPP = nil
_, err = pControl.RegisterAttempt(info.PaymentHash, &b)
if err != ErrMPPayment {
t.Fatalf("expected ErrMPPayment, got: %v", err)
}
// Try to register attempt one with a different payment address.
b.Route.FinalHop().MPP = record.NewMPP(
info.Value, [32]byte{2},
)
_, err = pControl.RegisterAttempt(info.PaymentHash, &b)
if err != ErrMPPPaymentAddrMismatch {
t.Fatalf("expected ErrMPPPaymentAddrMismatch, got: %v", err)
}
// Try registering one with a different total amount.
b.Route.FinalHop().MPP = record.NewMPP(
info.Value/2, [32]byte{1},
)
_, err = pControl.RegisterAttempt(info.PaymentHash, &b)
if err != ErrMPPTotalAmountMismatch {
t.Fatalf("expected ErrMPPTotalAmountMismatch, got: %v", err)
}
// Create and init a new payment. This time we'll check that we cannot
// register an MPP attempt if we already registered a non-MPP one.
info, attempt, _, err = genInfo()
if err != nil {
t.Fatalf("unable to generate htlc message: %v", err)
}
err = pControl.InitPayment(info.PaymentHash, info)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
attempt.Route.FinalHop().MPP = nil
_, err = pControl.RegisterAttempt(info.PaymentHash, attempt)
if err != nil {
t.Fatalf("unable to send htlc message: %v", err)
}
// Attempt to register an MPP attempt, which should fail.
b = *attempt
b.AttemptID = 1
b.Route.FinalHop().MPP = record.NewMPP(
info.Value, [32]byte{1},
)
_, err = pControl.RegisterAttempt(info.PaymentHash, &b)
if err != ErrNonMPPayment {
t.Fatalf("expected ErrNonMPPayment, got: %v", err)
}
}
// assertPaymentStatus retrieves the status of the payment referred to by hash
// and compares it with the expected state.
func assertPaymentStatus(t *testing.T, p *PaymentControl,
hash lntypes.Hash, expStatus PaymentStatus) {
t.Helper()
payment, err := p.FetchPayment(hash)
if expStatus == StatusUnknown && err == ErrPaymentNotInitiated {
return
}
if err != nil {
t.Fatal(err)
}
if payment.Status != expStatus {
t.Fatalf("payment status mismatch: expected %v, got %v",
expStatus, payment.Status)
}
}
type htlcStatus struct {
*HTLCAttemptInfo
settle *lntypes.Preimage
failure *HTLCFailReason
}
// assertPaymentInfo retrieves the payment referred to by hash and verifies the
// expected values.
func assertPaymentInfo(t *testing.T, p *PaymentControl, hash lntypes.Hash,
c *PaymentCreationInfo, f *FailureReason, a *htlcStatus) {
t.Helper()
payment, err := p.FetchPayment(hash)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(payment.Info, c) {
t.Fatalf("PaymentCreationInfos don't match: %v vs %v",
spew.Sdump(payment.Info), spew.Sdump(c))
}
if f != nil {
if *payment.FailureReason != *f {
t.Fatal("unexpected failure reason")
}
} else {
if payment.FailureReason != nil {
t.Fatal("unexpected failure reason")
}
}
if a == nil {
if len(payment.HTLCs) > 0 {
t.Fatal("expected no htlcs")
}
return
}
htlc := payment.HTLCs[a.AttemptID]
if err := assertRouteEqual(&htlc.Route, &a.Route); err != nil {
t.Fatal("routes do not match")
}
if htlc.AttemptID != a.AttemptID {
t.Fatalf("unnexpected attempt ID %v, expected %v",
htlc.AttemptID, a.AttemptID)
}
if a.failure != nil {
if htlc.Failure == nil {
t.Fatalf("expected HTLC to be failed")
}
if htlc.Failure.Reason != *a.failure {
t.Fatalf("expected HTLC failure %v, had %v",
*a.failure, htlc.Failure.Reason)
}
} else if htlc.Failure != nil {
t.Fatalf("expected no HTLC failure")
}
if a.settle != nil {
if htlc.Settle.Preimage != *a.settle {
t.Fatalf("Preimages don't match: %x vs %x",
htlc.Settle.Preimage, a.settle)
}
} else if htlc.Settle != nil {
t.Fatal("expected no settle info")
}
}