Merge pull request #9826 from ziggie1984/refactor-payments-code-02

Refactor Payment PR 2
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Yong authored and GitHub committed 2025-08-04 17:01:30 +08:00
commit 21726f0179
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@@ -1,836 +0,0 @@
package channeldb
import (
"bytes"
"encoding/binary"
"errors"
"fmt"
"io"
"sync"
"time"
"github.com/lightningnetwork/lnd/kvdb"
"github.com/lightningnetwork/lnd/lntypes"
)
const (
// paymentSeqBlockSize is the block size used when we batch allocate
// payment sequences for future payments.
paymentSeqBlockSize = 1000
// paymentProgressLogInterval is the interval we use limiting the
// logging output of payment processing.
paymentProgressLogInterval = 30 * time.Second
)
var (
// ErrAlreadyPaid signals we have already paid this payment hash.
ErrAlreadyPaid = errors.New("invoice is already paid")
// ErrPaymentInFlight signals that payment for this payment hash is
// already "in flight" on the network.
ErrPaymentInFlight = errors.New("payment is in transition")
// ErrPaymentExists is returned when we try to initialize an already
// existing payment that is not failed.
ErrPaymentExists = errors.New("payment already exists")
// ErrPaymentInternal is returned when performing the payment has a
// conflicting state, such as,
// - payment has StatusSucceeded but remaining amount is not zero.
// - payment has StatusInitiated but remaining amount is zero.
// - payment has StatusFailed but remaining amount is zero.
ErrPaymentInternal = errors.New("internal error")
// ErrPaymentNotInitiated is returned if the payment wasn't initiated.
ErrPaymentNotInitiated = errors.New("payment isn't initiated")
// ErrPaymentAlreadySucceeded is returned in the event we attempt to
// change the status of a payment already succeeded.
ErrPaymentAlreadySucceeded = errors.New("payment is already succeeded")
// ErrPaymentAlreadyFailed is returned in the event we attempt to alter
// a failed payment.
ErrPaymentAlreadyFailed = errors.New("payment has already failed")
// ErrUnknownPaymentStatus is returned when we do not recognize the
// existing state of a payment.
ErrUnknownPaymentStatus = errors.New("unknown payment status")
// ErrPaymentTerminal is returned if we attempt to alter a payment that
// already has reached a terminal condition.
ErrPaymentTerminal = errors.New("payment has reached terminal " +
"condition")
// ErrAttemptAlreadySettled is returned if we try to alter an already
// settled HTLC attempt.
ErrAttemptAlreadySettled = errors.New("attempt already settled")
// ErrAttemptAlreadyFailed is returned if we try to alter an already
// failed HTLC attempt.
ErrAttemptAlreadyFailed = errors.New("attempt already failed")
// ErrValueMismatch is returned if we try to register a non-MPP attempt
// with an amount that doesn't match the payment amount.
ErrValueMismatch = errors.New("attempted value doesn't match payment " +
"amount")
// ErrValueExceedsAmt is returned if we try to register an attempt that
// would take the total sent amount above the payment amount.
ErrValueExceedsAmt = errors.New("attempted value exceeds payment " +
"amount")
// ErrNonMPPayment is returned if we try to register an MPP attempt for
// a payment that already has a non-MPP attempt registered.
ErrNonMPPayment = errors.New("payment has non-MPP attempts")
// ErrMPPayment is returned if we try to register a non-MPP attempt for
// a payment that already has an MPP attempt registered.
ErrMPPayment = errors.New("payment has MPP attempts")
// ErrMPPRecordInBlindedPayment is returned if we try to register an
// attempt with an MPP record for a payment to a blinded path.
ErrMPPRecordInBlindedPayment = errors.New("blinded payment cannot " +
"contain MPP records")
// ErrBlindedPaymentTotalAmountMismatch is returned if we try to
// register an HTLC shard to a blinded route where the total amount
// doesn't match existing shards.
ErrBlindedPaymentTotalAmountMismatch = errors.New("blinded path " +
"total amount mismatch")
// ErrMPPPaymentAddrMismatch is returned if we try to register an MPP
// shard where the payment address doesn't match existing shards.
ErrMPPPaymentAddrMismatch = errors.New("payment address mismatch")
// ErrMPPTotalAmountMismatch is returned if we try to register an MPP
// shard where the total amount doesn't match existing shards.
ErrMPPTotalAmountMismatch = errors.New("mp payment total amount " +
"mismatch")
// ErrPaymentPendingSettled is returned when we try to add a new
// attempt to a payment that has at least one of its HTLCs settled.
ErrPaymentPendingSettled = errors.New("payment has settled htlcs")
// ErrPaymentPendingFailed is returned when we try to add a new attempt
// to a payment that already has a failure reason.
ErrPaymentPendingFailed = errors.New("payment has failure reason")
// ErrSentExceedsTotal is returned if the payment's current total sent
// amount exceed the total amount.
ErrSentExceedsTotal = errors.New("total sent exceeds total amount")
// errNoAttemptInfo is returned when no attempt info is stored yet.
errNoAttemptInfo = errors.New("unable to find attempt info for " +
"inflight payment")
// errNoSequenceNrIndex is returned when an attempt to lookup a payment
// index is made for a sequence number that is not indexed.
errNoSequenceNrIndex = errors.New("payment sequence number index " +
"does not exist")
)
// PaymentControl implements persistence for payments and payment attempts.
type PaymentControl struct {
paymentSeqMx sync.Mutex
currPaymentSeq uint64
storedPaymentSeq uint64
db *DB
}
// NewPaymentControl creates a new instance of the PaymentControl.
func NewPaymentControl(db *DB) *PaymentControl {
return &PaymentControl{
db: db,
}
}
// InitPayment checks or records the given PaymentCreationInfo with the DB,
// making sure it does not already exist as an in-flight payment. When this
// method returns successfully, the payment is guaranteed to be in the InFlight
// state.
func (p *PaymentControl) InitPayment(paymentHash lntypes.Hash,
info *PaymentCreationInfo) error {
// Obtain a new sequence number for this payment. This is used
// to sort the payments in order of creation, and also acts as
// a unique identifier for each payment.
sequenceNum, err := p.nextPaymentSequence()
if err != nil {
return err
}
var b bytes.Buffer
if err := serializePaymentCreationInfo(&b, info); err != nil {
return err
}
infoBytes := b.Bytes()
var updateErr error
err = kvdb.Batch(p.db.Backend, func(tx kvdb.RwTx) error {
// Reset the update error, to avoid carrying over an error
// from a previous execution of the batched db transaction.
updateErr = nil
prefetchPayment(tx, paymentHash)
bucket, err := createPaymentBucket(tx, paymentHash)
if err != nil {
return err
}
// Get the existing status of this payment, if any.
paymentStatus, err := fetchPaymentStatus(bucket)
switch {
// If no error is returned, it means we already have this
// payment. We'll check the status to decide whether we allow
// retrying the payment or return a specific error.
case err == nil:
if err := paymentStatus.initializable(); err != nil {
updateErr = err
return nil
}
// Otherwise, if the error is not `ErrPaymentNotInitiated`,
// we'll return the error.
case !errors.Is(err, ErrPaymentNotInitiated):
return err
}
// Before we set our new sequence number, we check whether this
// payment has a previously set sequence number and remove its
// index entry if it exists. This happens in the case where we
// have a previously attempted payment which was left in a state
// where we can retry.
seqBytes := bucket.Get(paymentSequenceKey)
if seqBytes != nil {
indexBucket := tx.ReadWriteBucket(paymentsIndexBucket)
if err := indexBucket.Delete(seqBytes); err != nil {
return err
}
}
// Once we have obtained a sequence number, we add an entry
// to our index bucket which will map the sequence number to
// our payment identifier.
err = createPaymentIndexEntry(
tx, sequenceNum, info.PaymentIdentifier,
)
if err != nil {
return err
}
err = bucket.Put(paymentSequenceKey, sequenceNum)
if err != nil {
return err
}
// Add the payment info to the bucket, which contains the
// static information for this payment
err = bucket.Put(paymentCreationInfoKey, infoBytes)
if err != nil {
return err
}
// We'll delete any lingering HTLCs to start with, in case we
// are initializing a payment that was attempted earlier, but
// left in a state where we could retry.
err = bucket.DeleteNestedBucket(paymentHtlcsBucket)
if err != nil && err != kvdb.ErrBucketNotFound {
return err
}
// Also delete any lingering failure info now that we are
// re-attempting.
return bucket.Delete(paymentFailInfoKey)
})
if err != nil {
return fmt.Errorf("unable to init payment: %w", err)
}
return updateErr
}
// DeleteFailedAttempts deletes all failed htlcs for a payment if configured
// by the PaymentControl db.
func (p *PaymentControl) DeleteFailedAttempts(hash lntypes.Hash) error {
if !p.db.keepFailedPaymentAttempts {
const failedHtlcsOnly = true
err := p.db.DeletePayment(hash, failedHtlcsOnly)
if err != nil {
return err
}
}
return nil
}
// paymentIndexTypeHash is a payment index type which indicates that we have
// created an index of payment sequence number to payment hash.
type paymentIndexType uint8
// paymentIndexTypeHash is a payment index type which indicates that we have
// created an index of payment sequence number to payment hash.
const paymentIndexTypeHash paymentIndexType = 0
// createPaymentIndexEntry creates a payment hash typed index for a payment. The
// index produced contains a payment index type (which can be used in future to
// signal different payment index types) and the payment identifier.
func createPaymentIndexEntry(tx kvdb.RwTx, sequenceNumber []byte,
id lntypes.Hash) error {
var b bytes.Buffer
if err := WriteElements(&b, paymentIndexTypeHash, id[:]); err != nil {
return err
}
indexes := tx.ReadWriteBucket(paymentsIndexBucket)
return indexes.Put(sequenceNumber, b.Bytes())
}
// deserializePaymentIndex deserializes a payment index entry. This function
// currently only supports deserialization of payment hash indexes, and will
// fail for other types.
func deserializePaymentIndex(r io.Reader) (lntypes.Hash, error) {
var (
indexType paymentIndexType
paymentHash []byte
)
if err := ReadElements(r, &indexType, &paymentHash); err != nil {
return lntypes.Hash{}, err
}
// While we only have on payment index type, we do not need to use our
// index type to deserialize the index. However, we sanity check that
// this type is as expected, since we had to read it out anyway.
if indexType != paymentIndexTypeHash {
return lntypes.Hash{}, fmt.Errorf("unknown payment index "+
"type: %v", indexType)
}
hash, err := lntypes.MakeHash(paymentHash)
if err != nil {
return lntypes.Hash{}, err
}
return hash, nil
}
// RegisterAttempt atomically records the provided HTLCAttemptInfo to the
// DB.
func (p *PaymentControl) RegisterAttempt(paymentHash lntypes.Hash,
attempt *HTLCAttemptInfo) (*MPPayment, error) {
// Serialize the information before opening the db transaction.
var a bytes.Buffer
err := serializeHTLCAttemptInfo(&a, attempt)
if err != nil {
return nil, err
}
htlcInfoBytes := a.Bytes()
htlcIDBytes := make([]byte, 8)
binary.BigEndian.PutUint64(htlcIDBytes, attempt.AttemptID)
var payment *MPPayment
err = kvdb.Batch(p.db.Backend, func(tx kvdb.RwTx) error {
prefetchPayment(tx, paymentHash)
bucket, err := fetchPaymentBucketUpdate(tx, paymentHash)
if err != nil {
return err
}
payment, err = fetchPayment(bucket)
if err != nil {
return err
}
// Check if registering a new attempt is allowed.
if err := payment.Registrable(); err != nil {
return err
}
// If the final hop has encrypted data, then we know this is a
// blinded payment. In blinded payments, MPP records are not set
// for split payments and the recipient is responsible for using
// a consistent PathID across the various encrypted data
// payloads that we received from them for this payment. All we
// need to check is that the total amount field for each HTLC
// in the split payment is correct.
isBlinded := len(attempt.Route.FinalHop().EncryptedData) != 0
// Make sure any existing shards match the new one with regards
// to MPP options.
mpp := attempt.Route.FinalHop().MPP
// MPP records should not be set for attempts to blinded paths.
if isBlinded && mpp != nil {
return ErrMPPRecordInBlindedPayment
}
for _, h := range payment.InFlightHTLCs() {
hMpp := h.Route.FinalHop().MPP
// If this is a blinded payment, then no existing HTLCs
// should have MPP records.
if isBlinded && hMpp != nil {
return ErrMPPRecordInBlindedPayment
}
// If this is a blinded payment, then we just need to
// check that the TotalAmtMsat field for this shard
// is equal to that of any other shard in the same
// payment.
if isBlinded {
if attempt.Route.FinalHop().TotalAmtMsat !=
h.Route.FinalHop().TotalAmtMsat {
//nolint:ll
return ErrBlindedPaymentTotalAmountMismatch
}
continue
}
switch {
// We tried to register a non-MPP attempt for a MPP
// payment.
case mpp == nil && hMpp != nil:
return ErrMPPayment
// We tried to register a MPP shard for a non-MPP
// payment.
case mpp != nil && hMpp == nil:
return ErrNonMPPayment
// Non-MPP payment, nothing more to validate.
case mpp == nil:
continue
}
// Check that MPP options match.
if mpp.PaymentAddr() != hMpp.PaymentAddr() {
return ErrMPPPaymentAddrMismatch
}
if mpp.TotalMsat() != hMpp.TotalMsat() {
return ErrMPPTotalAmountMismatch
}
}
// If this is a non-MPP attempt, it must match the total amount
// exactly. Note that a blinded payment is considered an MPP
// attempt.
amt := attempt.Route.ReceiverAmt()
if !isBlinded && mpp == nil && amt != payment.Info.Value {
return ErrValueMismatch
}
// Ensure we aren't sending more than the total payment amount.
sentAmt, _ := payment.SentAmt()
if sentAmt+amt > payment.Info.Value {
return fmt.Errorf("%w: attempted=%v, payment amount="+
"%v", ErrValueExceedsAmt, sentAmt+amt,
payment.Info.Value)
}
htlcsBucket, err := bucket.CreateBucketIfNotExists(
paymentHtlcsBucket,
)
if err != nil {
return err
}
err = htlcsBucket.Put(
htlcBucketKey(htlcAttemptInfoKey, htlcIDBytes),
htlcInfoBytes,
)
if err != nil {
return err
}
// Retrieve attempt info for the notification.
payment, err = fetchPayment(bucket)
return err
})
if err != nil {
return nil, err
}
return payment, err
}
// SettleAttempt marks the given attempt settled with the preimage. If this is
// a multi shard payment, this might implicitly mean that the full payment
// succeeded.
//
// After invoking this method, InitPayment should always return an error to
// prevent us from making duplicate payments to the same payment hash. The
// provided preimage is atomically saved to the DB for record keeping.
func (p *PaymentControl) SettleAttempt(hash lntypes.Hash,
attemptID uint64, settleInfo *HTLCSettleInfo) (*MPPayment, error) {
var b bytes.Buffer
if err := serializeHTLCSettleInfo(&b, settleInfo); err != nil {
return nil, err
}
settleBytes := b.Bytes()
return p.updateHtlcKey(hash, attemptID, htlcSettleInfoKey, settleBytes)
}
// FailAttempt marks the given payment attempt failed.
func (p *PaymentControl) FailAttempt(hash lntypes.Hash,
attemptID uint64, failInfo *HTLCFailInfo) (*MPPayment, error) {
var b bytes.Buffer
if err := serializeHTLCFailInfo(&b, failInfo); err != nil {
return nil, err
}
failBytes := b.Bytes()
return p.updateHtlcKey(hash, attemptID, htlcFailInfoKey, failBytes)
}
// updateHtlcKey updates a database key for the specified htlc.
func (p *PaymentControl) updateHtlcKey(paymentHash lntypes.Hash,
attemptID uint64, key, value []byte) (*MPPayment, error) {
aid := make([]byte, 8)
binary.BigEndian.PutUint64(aid, attemptID)
var payment *MPPayment
err := kvdb.Batch(p.db.Backend, func(tx kvdb.RwTx) error {
payment = nil
prefetchPayment(tx, paymentHash)
bucket, err := fetchPaymentBucketUpdate(tx, paymentHash)
if err != nil {
return err
}
p, err := fetchPayment(bucket)
if err != nil {
return err
}
// We can only update keys of in-flight payments. We allow
// updating keys even if the payment has reached a terminal
// condition, since the HTLC outcomes must still be updated.
if err := p.Status.updatable(); err != nil {
return err
}
htlcsBucket := bucket.NestedReadWriteBucket(paymentHtlcsBucket)
if htlcsBucket == nil {
return fmt.Errorf("htlcs bucket not found")
}
if htlcsBucket.Get(htlcBucketKey(htlcAttemptInfoKey, aid)) == nil {
return fmt.Errorf("HTLC with ID %v not registered",
attemptID)
}
// Make sure the shard is not already failed or settled.
if htlcsBucket.Get(htlcBucketKey(htlcFailInfoKey, aid)) != nil {
return ErrAttemptAlreadyFailed
}
if htlcsBucket.Get(htlcBucketKey(htlcSettleInfoKey, aid)) != nil {
return ErrAttemptAlreadySettled
}
// Add or update the key for this htlc.
err = htlcsBucket.Put(htlcBucketKey(key, aid), value)
if err != nil {
return err
}
// Retrieve attempt info for the notification.
payment, err = fetchPayment(bucket)
return err
})
if err != nil {
return nil, err
}
return payment, err
}
// Fail transitions a payment into the Failed state, and records the reason the
// payment failed. After invoking this method, InitPayment should return nil on
// its next call for this payment hash, allowing the switch to make a
// subsequent payment.
func (p *PaymentControl) Fail(paymentHash lntypes.Hash,
reason FailureReason) (*MPPayment, error) {
var (
updateErr error
payment *MPPayment
)
err := kvdb.Batch(p.db.Backend, func(tx kvdb.RwTx) error {
// Reset the update error, to avoid carrying over an error
// from a previous execution of the batched db transaction.
updateErr = nil
payment = nil
prefetchPayment(tx, paymentHash)
bucket, err := fetchPaymentBucketUpdate(tx, paymentHash)
if err == ErrPaymentNotInitiated {
updateErr = ErrPaymentNotInitiated
return nil
} else if err != nil {
return err
}
// We mark the payment as failed as long as it is known. This
// lets the last attempt to fail with a terminal write its
// failure to the PaymentControl without synchronizing with
// other attempts.
_, err = fetchPaymentStatus(bucket)
if errors.Is(err, ErrPaymentNotInitiated) {
updateErr = ErrPaymentNotInitiated
return nil
} else if err != nil {
return err
}
// Put the failure reason in the bucket for record keeping.
v := []byte{byte(reason)}
err = bucket.Put(paymentFailInfoKey, v)
if err != nil {
return err
}
// Retrieve attempt info for the notification, if available.
payment, err = fetchPayment(bucket)
if err != nil {
return err
}
return nil
})
if err != nil {
return nil, err
}
return payment, updateErr
}
// FetchPayment returns information about a payment from the database.
func (p *PaymentControl) FetchPayment(paymentHash lntypes.Hash) (
*MPPayment, error) {
var payment *MPPayment
err := kvdb.View(p.db, func(tx kvdb.RTx) error {
prefetchPayment(tx, paymentHash)
bucket, err := fetchPaymentBucket(tx, paymentHash)
if err != nil {
return err
}
payment, err = fetchPayment(bucket)
return err
}, func() {
payment = nil
})
if err != nil {
return nil, err
}
return payment, nil
}
// prefetchPayment attempts to prefetch as much of the payment as possible to
// reduce DB roundtrips.
func prefetchPayment(tx kvdb.RTx, paymentHash lntypes.Hash) {
rb := kvdb.RootBucket(tx)
kvdb.Prefetch(
rb,
[]string{
// Prefetch all keys in the payment's bucket.
string(paymentsRootBucket),
string(paymentHash[:]),
},
[]string{
// Prefetch all keys in the payment's htlc bucket.
string(paymentsRootBucket),
string(paymentHash[:]),
string(paymentHtlcsBucket),
},
)
}
// createPaymentBucket creates or fetches the sub-bucket assigned to this
// payment hash.
func createPaymentBucket(tx kvdb.RwTx, paymentHash lntypes.Hash) (
kvdb.RwBucket, error) {
payments, err := tx.CreateTopLevelBucket(paymentsRootBucket)
if err != nil {
return nil, err
}
return payments.CreateBucketIfNotExists(paymentHash[:])
}
// fetchPaymentBucket fetches the sub-bucket assigned to this payment hash. If
// the bucket does not exist, it returns ErrPaymentNotInitiated.
func fetchPaymentBucket(tx kvdb.RTx, paymentHash lntypes.Hash) (
kvdb.RBucket, error) {
payments := tx.ReadBucket(paymentsRootBucket)
if payments == nil {
return nil, ErrPaymentNotInitiated
}
bucket := payments.NestedReadBucket(paymentHash[:])
if bucket == nil {
return nil, ErrPaymentNotInitiated
}
return bucket, nil
}
// fetchPaymentBucketUpdate is identical to fetchPaymentBucket, but it returns a
// bucket that can be written to.
func fetchPaymentBucketUpdate(tx kvdb.RwTx, paymentHash lntypes.Hash) (
kvdb.RwBucket, error) {
payments := tx.ReadWriteBucket(paymentsRootBucket)
if payments == nil {
return nil, ErrPaymentNotInitiated
}
bucket := payments.NestedReadWriteBucket(paymentHash[:])
if bucket == nil {
return nil, ErrPaymentNotInitiated
}
return bucket, nil
}
// nextPaymentSequence returns the next sequence number to store for a new
// payment.
func (p *PaymentControl) nextPaymentSequence() ([]byte, error) {
p.paymentSeqMx.Lock()
defer p.paymentSeqMx.Unlock()
// Set a new upper bound in the DB every 1000 payments to avoid
// conflicts on the sequence when using etcd.
if p.currPaymentSeq == p.storedPaymentSeq {
var currPaymentSeq, newUpperBound uint64
if err := kvdb.Update(p.db.Backend, func(tx kvdb.RwTx) error {
paymentsBucket, err := tx.CreateTopLevelBucket(
paymentsRootBucket,
)
if err != nil {
return err
}
currPaymentSeq = paymentsBucket.Sequence()
newUpperBound = currPaymentSeq + paymentSeqBlockSize
return paymentsBucket.SetSequence(newUpperBound)
}, func() {}); err != nil {
return nil, err
}
// We lazy initialize the cached currPaymentSeq here using the
// first nextPaymentSequence() call. This if statement will auto
// initialize our stored currPaymentSeq, since by default both
// this variable and storedPaymentSeq are zero which in turn
// will have us fetch the current values from the DB.
if p.currPaymentSeq == 0 {
p.currPaymentSeq = currPaymentSeq
}
p.storedPaymentSeq = newUpperBound
}
p.currPaymentSeq++
b := make([]byte, 8)
binary.BigEndian.PutUint64(b, p.currPaymentSeq)
return b, nil
}
// fetchPaymentStatus fetches the payment status of the payment. If the payment
// isn't found, it will return error `ErrPaymentNotInitiated`.
func fetchPaymentStatus(bucket kvdb.RBucket) (PaymentStatus, error) {
// Creation info should be set for all payments, regardless of state.
// If not, it is unknown.
if bucket.Get(paymentCreationInfoKey) == nil {
return 0, ErrPaymentNotInitiated
}
payment, err := fetchPayment(bucket)
if err != nil {
return 0, err
}
return payment.Status, nil
}
// FetchInFlightPayments returns all payments with status InFlight.
func (p *PaymentControl) FetchInFlightPayments() ([]*MPPayment, error) {
var (
inFlights []*MPPayment
start = time.Now()
lastLogTime = time.Now()
processedCount int
)
err := kvdb.View(p.db, func(tx kvdb.RTx) error {
payments := tx.ReadBucket(paymentsRootBucket)
if payments == nil {
return nil
}
return payments.ForEach(func(k, _ []byte) error {
bucket := payments.NestedReadBucket(k)
if bucket == nil {
return fmt.Errorf("non bucket element")
}
p, err := fetchPayment(bucket)
if err != nil {
return err
}
processedCount++
if time.Since(lastLogTime) >=
paymentProgressLogInterval {
log.Debugf("Scanning inflight payments "+
"(in progress), processed %d, last "+
"processed payment: %v", processedCount,
p.Info)
lastLogTime = time.Now()
}
// Skip the payment if it's terminated.
if p.Terminated() {
return nil
}
inFlights = append(inFlights, p)
return nil
})
}, func() {
inFlights = nil
})
if err != nil {
return nil, err
}
elapsed := time.Since(start)
log.Debugf("Completed scanning for inflight payments: "+
"total_processed=%d, found_inflight=%d, elapsed=%v",
processedCount, len(inFlights),
elapsed.Round(time.Millisecond))
return inFlights, nil
}
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@@ -1,7 +1,6 @@
package channeldb
import (
"bytes"
"fmt"
"math"
"reflect"
@@ -9,14 +8,9 @@ import (
"time"
"github.com/btcsuite/btcd/btcec/v2"
"github.com/btcsuite/btcwallet/walletdb"
"github.com/davecgh/go-spew/spew"
"github.com/lightningnetwork/lnd/kvdb"
"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/lightningnetwork/lnd/record"
"github.com/lightningnetwork/lnd/routing/route"
"github.com/lightningnetwork/lnd/tlv"
"github.com/stretchr/testify/require"
)
@@ -97,98 +91,6 @@ var (
}
)
func makeFakeInfo(t *testing.T) (*PaymentCreationInfo, *HTLCAttemptInfo) {
var preimg lntypes.Preimage
copy(preimg[:], rev[:])
hash := preimg.Hash()
c := &PaymentCreationInfo{
PaymentIdentifier: hash,
Value: 1000,
// Use single second precision to avoid false positive test
// failures due to the monotonic time component.
CreationTime: time.Unix(time.Now().Unix(), 0),
PaymentRequest: []byte("test"),
}
a, err := NewHtlcAttempt(
44, priv, testRoute, time.Unix(100, 0), &hash,
)
require.NoError(t, err)
return c, &a.HTLCAttemptInfo
}
func TestSentPaymentSerialization(t *testing.T) {
t.Parallel()
c, s := makeFakeInfo(t)
var b bytes.Buffer
require.NoError(t, serializePaymentCreationInfo(&b, c), "serialize")
// Assert the length of the serialized creation info is as expected,
// without any custom records.
baseLength := 32 + 8 + 8 + 4 + len(c.PaymentRequest)
require.Len(t, b.Bytes(), baseLength)
newCreationInfo, err := deserializePaymentCreationInfo(&b)
require.NoError(t, err, "deserialize")
require.Equal(t, c, newCreationInfo)
b.Reset()
// Now we add some custom records to the creation info and serialize it
// again.
c.FirstHopCustomRecords = lnwire.CustomRecords{
lnwire.MinCustomRecordsTlvType: []byte{1, 2, 3},
}
require.NoError(t, serializePaymentCreationInfo(&b, c), "serialize")
newCreationInfo, err = deserializePaymentCreationInfo(&b)
require.NoError(t, err, "deserialize")
require.Equal(t, c, newCreationInfo)
b.Reset()
require.NoError(t, serializeHTLCAttemptInfo(&b, s), "serialize")
newWireInfo, err := deserializeHTLCAttemptInfo(&b)
require.NoError(t, err, "deserialize")
// First we verify all the records match up properly.
require.Equal(t, s.Route, newWireInfo.Route)
// We now add the new fields and custom records to the route and
// serialize it again.
b.Reset()
s.Route.FirstHopAmount = tlv.NewRecordT[tlv.TlvType0](
tlv.NewBigSizeT(lnwire.MilliSatoshi(1234)),
)
s.Route.FirstHopWireCustomRecords = lnwire.CustomRecords{
lnwire.MinCustomRecordsTlvType + 3: []byte{4, 5, 6},
}
require.NoError(t, serializeHTLCAttemptInfo(&b, s), "serialize")
newWireInfo, err = deserializeHTLCAttemptInfo(&b)
require.NoError(t, err, "deserialize")
require.Equal(t, s.Route, newWireInfo.Route)
err = newWireInfo.attachOnionBlobAndCircuit()
require.NoError(t, err)
// Clear routes to allow DeepEqual to compare the remaining fields.
newWireInfo.Route = route.Route{}
s.Route = route.Route{}
newWireInfo.AttemptID = s.AttemptID
// Call session key method to set our cached session key so we can use
// DeepEqual, and assert that our key equals the original key.
require.Equal(t, s.cachedSessionKey, newWireInfo.SessionKey())
require.Equal(t, s, newWireInfo)
}
// assertRouteEquals compares to routes for equality and returns an error if
// they are not equal.
func assertRouteEqual(a, b *route.Route) error {
@@ -200,53 +102,6 @@ func assertRouteEqual(a, b *route.Route) error {
return nil
}
// TestRouteSerialization tests serialization of a regular and blinded route.
func TestRouteSerialization(t *testing.T) {
t.Parallel()
testSerializeRoute(t, testRoute)
testSerializeRoute(t, testBlindedRoute)
}
func testSerializeRoute(t *testing.T, route route.Route) {
var b bytes.Buffer
err := SerializeRoute(&b, route)
require.NoError(t, err)
r := bytes.NewReader(b.Bytes())
route2, err := DeserializeRoute(r)
require.NoError(t, err)
reflect.DeepEqual(route, route2)
}
// deletePayment removes a payment with paymentHash from the payments database.
func deletePayment(t *testing.T, db *DB, paymentHash lntypes.Hash, seqNr uint64) {
t.Helper()
err := kvdb.Update(db, func(tx kvdb.RwTx) error {
payments := tx.ReadWriteBucket(paymentsRootBucket)
// Delete the payment bucket.
err := payments.DeleteNestedBucket(paymentHash[:])
if err != nil {
return err
}
key := make([]byte, 8)
byteOrder.PutUint64(key, seqNr)
// Delete the index that references this payment.
indexes := tx.ReadWriteBucket(paymentsIndexBucket)
return indexes.Delete(key)
}, func() {})
if err != nil {
t.Fatalf("could not delete "+
"payment: %v", err)
}
}
// TestQueryPayments tests retrieval of payments with forwards and reversed
// queries.
func TestQueryPayments(t *testing.T) {
@@ -502,9 +357,11 @@ func TestQueryPayments(t *testing.T) {
t.Fatalf("unable to init db: %v", err)
}
paymentDB := NewKVPaymentsDB(db)
// Make a preliminary query to make sure it's ok to
// query when we have no payments.
resp, err := db.QueryPayments(tt.query)
resp, err := paymentDB.QueryPayments(tt.query)
require.NoError(t, err)
require.Len(t, resp.Payments, 0)
@@ -516,7 +373,6 @@ func TestQueryPayments(t *testing.T) {
// where we have duplicates in the nested duplicates
// bucket.
nonDuplicatePayments := 6
pControl := NewPaymentControl(db)
for i := 0; i < nonDuplicatePayments; i++ {
// Generate a test payment.
@@ -530,7 +386,9 @@ func TestQueryPayments(t *testing.T) {
info.CreationTime = time.Unix(int64(i+1), 0)
// Create a new payment entry in the database.
err = pControl.InitPayment(info.PaymentIdentifier, info)
err = paymentDB.InitPayment(
info.PaymentIdentifier, info,
)
if err != nil {
t.Fatalf("unable to initialize "+
"payment in database: %v", err)
@@ -538,7 +396,7 @@ func TestQueryPayments(t *testing.T) {
// Immediately delete the payment with index 2.
if i == 1 {
pmt, err := pControl.FetchPayment(
pmt, err := paymentDB.FetchPayment(
info.PaymentIdentifier,
)
require.NoError(t, err)
@@ -552,13 +410,13 @@ func TestQueryPayments(t *testing.T) {
// to the parent payment + 1. Note that
// duplicate payments will always be succeeded.
if i == (nonDuplicatePayments - 1) {
pmt, err := pControl.FetchPayment(
pmt, err := paymentDB.FetchPayment(
info.PaymentIdentifier,
)
require.NoError(t, err)
appendDuplicatePayment(
t, pControl.db,
t, paymentDB.db,
info.PaymentIdentifier,
pmt.SequenceNum+1,
preimg,
@@ -567,19 +425,19 @@ func TestQueryPayments(t *testing.T) {
}
// Fetch all payments in the database.
allPayments, err := db.FetchPayments()
allPayments, err := paymentDB.FetchPayments()
if err != nil {
t.Fatalf("payments could not be fetched from "+
"database: %v", err)
}
if len(allPayments) != 6 {
t.Fatalf("Number of payments received does not "+
"match expected one. Got %v, want %v.",
len(allPayments), 6)
t.Fatalf("Number of payments received does "+
"not match expected one. Got %v, "+
"want %v.", len(allPayments), 6)
}
querySlice, err := db.QueryPayments(tt.query)
querySlice, err := paymentDB.QueryPayments(tt.query)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
@@ -587,7 +445,8 @@ func TestQueryPayments(t *testing.T) {
tt.lastIndex != querySlice.LastIndexOffset {
t.Errorf("First or last index does not match "+
"expected index. Want (%d, %d), got (%d, %d).",
"expected index. Want (%d, %d), "+
"got (%d, %d).",
tt.firstIndex, tt.lastIndex,
querySlice.FirstIndexOffset,
querySlice.LastIndexOffset)
@@ -595,225 +454,18 @@ func TestQueryPayments(t *testing.T) {
if len(querySlice.Payments) != len(tt.expectedSeqNrs) {
t.Errorf("expected: %v payments, got: %v",
len(tt.expectedSeqNrs), len(querySlice.Payments))
len(tt.expectedSeqNrs),
len(querySlice.Payments))
}
for i, seqNr := range tt.expectedSeqNrs {
q := querySlice.Payments[i]
if seqNr != q.SequenceNum {
t.Errorf("sequence numbers do not match, "+
"got %v, want %v", q.SequenceNum, seqNr)
t.Errorf("sequence numbers do not "+
"match, got %v, want %v",
q.SequenceNum, seqNr)
}
}
})
}
}
// TestFetchPaymentWithSequenceNumber tests lookup of payments with their
// sequence number. It sets up one payment with no duplicates, and another with
// two duplicates in its duplicates bucket then uses these payments to test the
// case where a specific duplicate is not found and the duplicates bucket is not
// present when we expect it to be.
func TestFetchPaymentWithSequenceNumber(t *testing.T) {
db, err := MakeTestDB(t)
require.NoError(t, err)
pControl := NewPaymentControl(db)
// Generate a test payment which does not have duplicates.
noDuplicates, _, _, err := genInfo(t)
require.NoError(t, err)
// Create a new payment entry in the database.
err = pControl.InitPayment(noDuplicates.PaymentIdentifier, noDuplicates)
require.NoError(t, err)
// Fetch the payment so we can get its sequence nr.
noDuplicatesPayment, err := pControl.FetchPayment(
noDuplicates.PaymentIdentifier,
)
require.NoError(t, err)
// Generate a test payment which we will add duplicates to.
hasDuplicates, _, preimg, err := genInfo(t)
require.NoError(t, err)
// Create a new payment entry in the database.
err = pControl.InitPayment(hasDuplicates.PaymentIdentifier, hasDuplicates)
require.NoError(t, err)
// Fetch the payment so we can get its sequence nr.
hasDuplicatesPayment, err := pControl.FetchPayment(
hasDuplicates.PaymentIdentifier,
)
require.NoError(t, err)
// We declare the sequence numbers used here so that we can reference
// them in tests.
var (
duplicateOneSeqNr = hasDuplicatesPayment.SequenceNum + 1
duplicateTwoSeqNr = hasDuplicatesPayment.SequenceNum + 2
)
// Add two duplicates to our second payment.
appendDuplicatePayment(
t, db, hasDuplicates.PaymentIdentifier, duplicateOneSeqNr, preimg,
)
appendDuplicatePayment(
t, db, hasDuplicates.PaymentIdentifier, duplicateTwoSeqNr, preimg,
)
tests := []struct {
name string
paymentHash lntypes.Hash
sequenceNumber uint64
expectedErr error
}{
{
name: "lookup payment without duplicates",
paymentHash: noDuplicates.PaymentIdentifier,
sequenceNumber: noDuplicatesPayment.SequenceNum,
expectedErr: nil,
},
{
name: "lookup payment with duplicates",
paymentHash: hasDuplicates.PaymentIdentifier,
sequenceNumber: hasDuplicatesPayment.SequenceNum,
expectedErr: nil,
},
{
name: "lookup first duplicate",
paymentHash: hasDuplicates.PaymentIdentifier,
sequenceNumber: duplicateOneSeqNr,
expectedErr: nil,
},
{
name: "lookup second duplicate",
paymentHash: hasDuplicates.PaymentIdentifier,
sequenceNumber: duplicateTwoSeqNr,
expectedErr: nil,
},
{
name: "lookup non-existent duplicate",
paymentHash: hasDuplicates.PaymentIdentifier,
sequenceNumber: 999999,
expectedErr: ErrDuplicateNotFound,
},
{
name: "lookup duplicate, no duplicates bucket",
paymentHash: noDuplicates.PaymentIdentifier,
sequenceNumber: duplicateTwoSeqNr,
expectedErr: ErrNoDuplicateBucket,
},
}
for _, test := range tests {
test := test
t.Run(test.name, func(t *testing.T) {
err := kvdb.Update(
db, func(tx walletdb.ReadWriteTx) error {
var seqNrBytes [8]byte
byteOrder.PutUint64(
seqNrBytes[:], test.sequenceNumber,
)
_, err := fetchPaymentWithSequenceNumber(
tx, test.paymentHash, seqNrBytes[:],
)
return err
}, func() {},
)
require.Equal(t, test.expectedErr, err)
})
}
}
// appendDuplicatePayment adds a duplicate payment to an existing payment. Note
// that this function requires a unique sequence number.
//
// This code is *only* intended to replicate legacy duplicate payments in lnd,
// our current schema does not allow duplicates.
func appendDuplicatePayment(t *testing.T, db *DB, paymentHash lntypes.Hash,
seqNr uint64, preImg lntypes.Preimage) {
err := kvdb.Update(db, func(tx walletdb.ReadWriteTx) error {
bucket, err := fetchPaymentBucketUpdate(
tx, paymentHash,
)
if err != nil {
return err
}
// Create the duplicates bucket if it is not
// present.
dup, err := bucket.CreateBucketIfNotExists(
duplicatePaymentsBucket,
)
if err != nil {
return err
}
var sequenceKey [8]byte
byteOrder.PutUint64(sequenceKey[:], seqNr)
// Create duplicate payments for the two dup
// sequence numbers we've setup.
putDuplicatePayment(t, dup, sequenceKey[:], paymentHash, preImg)
// Finally, once we have created our entry we add an index for
// it.
err = createPaymentIndexEntry(tx, sequenceKey[:], paymentHash)
require.NoError(t, err)
return nil
}, func() {})
require.NoError(t, err, "could not create payment")
}
// putDuplicatePayment creates a duplicate payment in the duplicates bucket
// provided with the minimal information required for successful reading.
func putDuplicatePayment(t *testing.T, duplicateBucket kvdb.RwBucket,
sequenceKey []byte, paymentHash lntypes.Hash,
preImg lntypes.Preimage) {
paymentBucket, err := duplicateBucket.CreateBucketIfNotExists(
sequenceKey,
)
require.NoError(t, err)
err = paymentBucket.Put(duplicatePaymentSequenceKey, sequenceKey)
require.NoError(t, err)
// Generate fake information for the duplicate payment.
info, _, _, err := genInfo(t)
require.NoError(t, err)
// Write the payment info to disk under the creation info key. This code
// is copied rather than using serializePaymentCreationInfo to ensure
// we always write in the legacy format used by duplicate payments.
var b bytes.Buffer
var scratch [8]byte
_, err = b.Write(paymentHash[:])
require.NoError(t, err)
byteOrder.PutUint64(scratch[:], uint64(info.Value))
_, err = b.Write(scratch[:])
require.NoError(t, err)
err = serializeTime(&b, info.CreationTime)
require.NoError(t, err)
byteOrder.PutUint32(scratch[:4], 0)
_, err = b.Write(scratch[:4])
require.NoError(t, err)
// Get the PaymentCreationInfo.
err = paymentBucket.Put(duplicatePaymentCreationInfoKey, b.Bytes())
require.NoError(t, err)
// Duolicate payments are only stored for successes, so add the
// preimage.
err = paymentBucket.Put(duplicatePaymentSettleInfoKey, preImg[:])
require.NoError(t, err)
}
+12
View File
@@ -924,6 +924,10 @@ type DatabaseInstances struct {
// InvoiceDB is the database that stores information about invoices.
InvoiceDB invoices.InvoiceDB
// KVPaymentsDB is the database that stores all payment related
// information.
KVPaymentsDB *channeldb.KVPaymentsDB
// MacaroonDB is the database that stores macaroon root keys.
MacaroonDB kvdb.Backend
@@ -1215,6 +1219,14 @@ func (d *DefaultDatabaseBuilder) BuildDatabase(
return nil, nil, err
}
// Mount the payments DB which is only KV for now.
//
// TODO(ziggie): Add support for SQL payments DB.
kvPaymentsDB := channeldb.NewKVPaymentsDB(
dbs.ChanStateDB,
)
dbs.KVPaymentsDB = kvPaymentsDB
// Wrap the watchtower client DB and make sure we clean up.
if cfg.WtClient.Active {
dbs.TowerClientDB, err = wtdb.OpenClientDB(
+2 -2
View File
@@ -151,7 +151,7 @@ func (s *controlTowerSubscriberImpl) Updates() <-chan interface{} {
// controlTower is persistent implementation of ControlTower to restrict
// double payment sending.
type controlTower struct {
db *channeldb.PaymentControl
db *channeldb.KVPaymentsDB
// subscriberIndex is used to provide a unique id for each subscriber
// to all payments. This is used to easily remove the subscriber when
@@ -168,7 +168,7 @@ type controlTower struct {
}
// NewControlTower creates a new instance of the controlTower.
func NewControlTower(db *channeldb.PaymentControl) ControlTower {
func NewControlTower(db *channeldb.KVPaymentsDB) ControlTower {
return &controlTower{
db: db,
subscribersAllPayments: make(
+19 -19
View File
@@ -49,7 +49,7 @@ func TestControlTowerSubscribeUnknown(t *testing.T) {
db := initDB(t, false)
pControl := NewControlTower(channeldb.NewPaymentControl(db))
pControl := NewControlTower(channeldb.NewKVPaymentsDB(db))
// Subscription should fail when the payment is not known.
_, err := pControl.SubscribePayment(lntypes.Hash{1})
@@ -63,7 +63,7 @@ func TestControlTowerSubscribeSuccess(t *testing.T) {
db := initDB(t, false)
pControl := NewControlTower(channeldb.NewPaymentControl(db))
pControl := NewControlTower(channeldb.NewKVPaymentsDB(db))
// Initiate a payment.
info, attempt, preimg, err := genInfo()
@@ -156,33 +156,33 @@ func TestControlTowerSubscribeSuccess(t *testing.T) {
}
}
// TestPaymentControlSubscribeFail tests that payment updates for a
// TestKVPaymentsDBSubscribeFail tests that payment updates for a
// failed payment are properly sent to subscribers.
func TestPaymentControlSubscribeFail(t *testing.T) {
func TestKVPaymentsDBSubscribeFail(t *testing.T) {
t.Parallel()
t.Run("register attempt, keep failed payments", func(t *testing.T) {
testPaymentControlSubscribeFail(t, true, true)
testKVPaymentsDBSubscribeFail(t, true, true)
})
t.Run("register attempt, delete failed payments", func(t *testing.T) {
testPaymentControlSubscribeFail(t, true, false)
testKVPaymentsDBSubscribeFail(t, true, false)
})
t.Run("no register attempt, keep failed payments", func(t *testing.T) {
testPaymentControlSubscribeFail(t, false, true)
testKVPaymentsDBSubscribeFail(t, false, true)
})
t.Run("no register attempt, delete failed payments", func(t *testing.T) {
testPaymentControlSubscribeFail(t, false, false)
testKVPaymentsDBSubscribeFail(t, false, false)
})
}
// TestPaymentControlSubscribeAllSuccess tests that multiple payments are
// TestKVPaymentsDBSubscribeAllSuccess tests that multiple payments are
// properly sent to subscribers of TrackPayments.
func TestPaymentControlSubscribeAllSuccess(t *testing.T) {
func TestKVPaymentsDBSubscribeAllSuccess(t *testing.T) {
t.Parallel()
db := initDB(t, true)
pControl := NewControlTower(channeldb.NewPaymentControl(db))
pControl := NewControlTower(channeldb.NewKVPaymentsDB(db))
// Initiate a payment.
info1, attempt1, preimg1, err := genInfo()
@@ -288,14 +288,14 @@ func TestPaymentControlSubscribeAllSuccess(t *testing.T) {
require.Equal(t, attempt2.Route, htlc2.Route, "unexpected htlc route.")
}
// TestPaymentControlSubscribeAllImmediate tests whether already inflight
// TestKVPaymentsDBSubscribeAllImmediate tests whether already inflight
// payments are reported at the start of the SubscribeAllPayments subscription.
func TestPaymentControlSubscribeAllImmediate(t *testing.T) {
func TestKVPaymentsDBSubscribeAllImmediate(t *testing.T) {
t.Parallel()
db := initDB(t, true)
pControl := NewControlTower(channeldb.NewPaymentControl(db))
pControl := NewControlTower(channeldb.NewKVPaymentsDB(db))
// Initiate a payment.
info, attempt, _, err := genInfo()
@@ -325,14 +325,14 @@ func TestPaymentControlSubscribeAllImmediate(t *testing.T) {
}
}
// TestPaymentControlUnsubscribeSuccess tests that when unsubscribed, there are
// TestKVPaymentsDBUnsubscribeSuccess tests that when unsubscribed, there are
// no more notifications to that specific subscription.
func TestPaymentControlUnsubscribeSuccess(t *testing.T) {
func TestKVPaymentsDBUnsubscribeSuccess(t *testing.T) {
t.Parallel()
db := initDB(t, true)
pControl := NewControlTower(channeldb.NewPaymentControl(db))
pControl := NewControlTower(channeldb.NewKVPaymentsDB(db))
subscription1, err := pControl.SubscribeAllPayments()
require.NoError(t, err, "expected subscribe to succeed, but got: %v")
@@ -396,12 +396,12 @@ func TestPaymentControlUnsubscribeSuccess(t *testing.T) {
require.Len(t, subscription2.Updates(), 0)
}
func testPaymentControlSubscribeFail(t *testing.T, registerAttempt,
func testKVPaymentsDBSubscribeFail(t *testing.T, registerAttempt,
keepFailedPaymentAttempts bool) {
db := initDB(t, keepFailedPaymentAttempts)
pControl := NewControlTower(channeldb.NewPaymentControl(db))
pControl := NewControlTower(channeldb.NewKVPaymentsDB(db))
// Initiate a payment.
info, attempt, _, err := genInfo()
+3 -3
View File
@@ -7527,7 +7527,7 @@ func (r *rpcServer) ListPayments(ctx context.Context,
query.MaxPayments = math.MaxUint64
}
paymentsQuerySlice, err := r.server.miscDB.QueryPayments(query)
paymentsQuerySlice, err := r.server.kvPaymentsDB.QueryPayments(query)
if err != nil {
return nil, err
}
@@ -7608,7 +7608,7 @@ func (r *rpcServer) DeletePayment(ctx context.Context,
rpcsLog.Infof("[DeletePayment] payment_identifier=%v, "+
"failed_htlcs_only=%v", hash, req.FailedHtlcsOnly)
err = r.server.miscDB.DeletePayment(hash, req.FailedHtlcsOnly)
err = r.server.kvPaymentsDB.DeletePayment(hash, req.FailedHtlcsOnly)
if err != nil {
return nil, err
}
@@ -7648,7 +7648,7 @@ func (r *rpcServer) DeleteAllPayments(ctx context.Context,
"failed_htlcs_only=%v", req.FailedPaymentsOnly,
req.FailedHtlcsOnly)
numDeletedPayments, err := r.server.miscDB.DeletePayments(
numDeletedPayments, err := r.server.kvPaymentsDB.DeletePayments(
req.FailedPaymentsOnly, req.FailedHtlcsOnly,
)
if err != nil {
+8 -3
View File
@@ -335,6 +335,12 @@ type server struct {
invoicesDB invoices.InvoiceDB
// kvPaymentsDB is the DB that contains all functions for managing
// payments.
//
// TODO(ziggie): Replace with interface.
kvPaymentsDB *channeldb.KVPaymentsDB
aliasMgr *aliasmgr.Manager
htlcSwitch *htlcswitch.Switch
@@ -678,6 +684,7 @@ func newServer(ctx context.Context, cfg *Config, listenAddrs []net.Addr,
addrSource: addrSource,
miscDB: dbs.ChanStateDB,
invoicesDB: dbs.InvoiceDB,
kvPaymentsDB: dbs.KVPaymentsDB,
cc: cc,
sigPool: lnwallet.NewSigPool(cfg.Workers.Sig, cc.Signer),
writePool: writePool,
@@ -1127,9 +1134,7 @@ func newServer(ctx context.Context, cfg *Config, listenAddrs []net.Addr,
PathFindingConfig: pathFindingConfig,
}
paymentControl := channeldb.NewPaymentControl(dbs.ChanStateDB)
s.controlTower = routing.NewControlTower(paymentControl)
s.controlTower = routing.NewControlTower(dbs.KVPaymentsDB)
strictPruning := cfg.Bitcoin.Node == "neutrino" ||
cfg.Routing.StrictZombiePruning