mirror of
https://github.com/lightninglabs/loop.git
synced 2026-08-13 12:33:03 +02:00
staticaddr/loopin: cancel orphan invoice on init failure
A static address loop-in that creates an invoice but then fails before storage cannot be recovered after restart, and persisted error paths that unlock deposits should not leave the swap invoice live either. The payment-deadline path also needs to report the real deposit unlock error instead of checking the FSM event returned by UnlockDepositsAction, because that action returns OnError on both success and failure. Cancel private swap invoices on pre-storage init failures, monitor timeouts, and stored unlock paths using a detached timeout-limited helper. Factor deposit unlocking into an error-returning helper so deadline handling can log transition failures, and add coverage for early-init cancellation plus generic unlock invoice cleanup and error propagation.
This commit is contained in:
Slyghtning
parent
b44f8484f2
commit
44a6c7a144
2 changed files with 324 additions and 30 deletions
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@ -36,6 +36,8 @@ const (
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defaultConfTarget = 3
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DefaultPaymentTimeoutSeconds = 60
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defaultInvoiceCleanupTimeout = 5 * time.Second
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)
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var (
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@ -57,6 +59,24 @@ var (
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func (f *FSM) InitHtlcAction(ctx context.Context,
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_ fsm.EventContext) fsm.EventType {
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var event fsm.EventType
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invoiceNeedsCleanup := false
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defer func() {
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// If we created the private invoice but failed before persisting the
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// swap, cancel it so retries do not accumulate orphan invoices.
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if !invoiceNeedsCleanup || event != fsm.OnError {
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return
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}
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f.cancelSwapInvoice()
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}()
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returnError := func(err error) fsm.EventType {
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event = f.HandleError(err)
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return event
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}
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// Lock the deposits and transition them to the LoopingIn state.
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err := f.cfg.DepositManager.TransitionDeposits(
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ctx, f.loopIn.Deposits, deposit.OnLoopInInitiated,
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@ -65,7 +85,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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if err != nil {
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err = fmt.Errorf("unable to loop-in deposits: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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// Calculate the swap invoice amount. The server needs to pay us the
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@ -88,7 +108,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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err = fmt.Errorf("unable to create random swap preimage: %w",
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err)
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return f.HandleError(err)
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return returnError(err)
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}
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f.loopIn.SwapPreimage = swapPreimage
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f.loopIn.SwapHash = swapPreimage.Hash()
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@ -100,7 +120,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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if err != nil {
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err = fmt.Errorf("unable to derive client htlc key: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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f.loopIn.ClientPubkey = keyDesc.PubKey
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f.loopIn.HtlcKeyLocator = keyDesc.KeyLocator
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@ -119,10 +139,14 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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if err != nil {
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err = fmt.Errorf("unable to create swap invoice: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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f.loopIn.SwapInvoice = swapInvoice
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// From here until CreateLoopIn succeeds, any error path would otherwise
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// leave behind a live invoice with no persisted swap to recover it.
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invoiceNeedsCleanup = true
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f.loopIn.ProtocolVersion = version.AddressProtocolVersion(
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version.CurrentRPCProtocolVersion(),
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)
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@ -149,7 +173,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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err = fmt.Errorf("unable to initiate the loop-in with the "+
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"server: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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// Pushing empty sigs signals the server that we abandoned the swap
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@ -171,7 +195,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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pushEmptySigs()
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err = fmt.Errorf("unable to parse server pubkey: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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f.loopIn.ServerPubkey = serverPubkey
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@ -185,7 +209,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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err = fmt.Errorf("server response parameters are outside "+
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"our allowed range: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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f.loopIn.HtlcCltvExpiry = loopInResp.HtlcExpiry
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@ -194,7 +218,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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pushEmptySigs()
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err = fmt.Errorf("unable to convert server nonces: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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f.htlcServerNoncesHighFee, err = toNonces(
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loopInResp.HighFeeHtlcInfo.Nonces,
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@ -202,7 +226,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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if err != nil {
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pushEmptySigs()
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return f.HandleError(err)
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return returnError(err)
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}
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f.htlcServerNoncesExtremelyHighFee, err = toNonces(
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loopInResp.ExtremeFeeHtlcInfo.Nonces,
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@ -210,7 +234,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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if err != nil {
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pushEmptySigs()
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return f.HandleError(err)
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return returnError(err)
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}
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// We need to defend against the server setting high fees for the htlc
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@ -232,7 +256,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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log.Errorf("server htlc tx fee is higher than the configured "+
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"allowed maximum: %v > %v", fee, maxHtlcTxFee)
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return f.HandleError(ErrFeeTooHigh)
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return returnError(ErrFeeTooHigh)
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}
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f.loopIn.HtlcTxFeeRate = feeRate
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@ -246,7 +270,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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"configured allowed maximum: %v > %v", fee,
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maxHtlcTxBackupFee)
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return f.HandleError(ErrFeeTooHigh)
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return returnError(ErrFeeTooHigh)
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}
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f.loopIn.HtlcTxHighFeeRate = highFeeRate
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@ -262,7 +286,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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"configured allowed maximum: %v > %v", fee,
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maxHtlcTxBackupFee)
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return f.HandleError(ErrFeeTooHigh)
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return returnError(ErrFeeTooHigh)
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}
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f.loopIn.HtlcTxExtremelyHighFeeRate = extremelyHighFeeRate
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@ -276,7 +300,7 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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err = fmt.Errorf("unable to derive htlc timeout sweep "+
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"address: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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f.loopIn.HtlcTimeoutSweepAddress = sweepAddress
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@ -286,10 +310,34 @@ func (f *FSM) InitHtlcAction(ctx context.Context,
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pushEmptySigs()
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err = fmt.Errorf("unable to store loop-in in db: %w", err)
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return f.HandleError(err)
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return returnError(err)
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}
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return OnHtlcInitiated
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// Once the swap is stored, restart/recovery code owns invoice lifecycle.
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invoiceNeedsCleanup = false
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event = OnHtlcInitiated
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return event
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}
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// cancelSwapInvoice best-effort cancels the current swap invoice using a
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// detached timeout-limited context.
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func (f *FSM) cancelSwapInvoice() {
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if f.loopIn.SwapInvoice == "" {
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return
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}
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cleanupCtx, cancel := context.WithTimeout(
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context.Background(), defaultInvoiceCleanupTimeout,
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)
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defer cancel()
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err := f.cfg.InvoicesClient.CancelInvoice(cleanupCtx, f.loopIn.SwapHash)
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if err != nil {
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f.Warnf("unable to cancel invoice for swap %v: %v",
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f.loopIn.SwapHash, err)
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}
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}
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// SignHtlcTxAction is called if the htlc was initialized and the server
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@ -557,11 +605,9 @@ func (f *FSM) MonitorInvoiceAndHtlcTxAction(ctx context.Context,
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// Cancel the lndclient invoice subscription.
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cancelInvoiceSubscription()
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err = f.cfg.InvoicesClient.CancelInvoice(ctx, f.loopIn.SwapHash)
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if err != nil {
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f.Warnf("unable to cancel invoice "+
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"for swap hash: %v", err)
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}
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// Reuse the same helper as InitHtlcAction so timeout cleanup
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// follows the same detached-context path as early-init cleanup.
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f.cancelSwapInvoice()
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}
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for {
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@ -609,10 +655,10 @@ func (f *FSM) MonitorInvoiceAndHtlcTxAction(ctx context.Context,
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// re-enable them for loop-ins and withdrawals.
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cancelInvoice()
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event := f.UnlockDepositsAction(ctx, nil)
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if event != fsm.OnError {
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f.Errorf("unable to unlock deposits after " +
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"payment deadline")
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err = f.unlockDeposits(ctx)
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if err != nil {
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f.Errorf("unable to unlock deposits after "+
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"payment deadline: %v", err)
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}
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case currentHeight := <-blockChan:
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@ -824,18 +870,27 @@ func (f *FSM) PaymentReceivedAction(ctx context.Context,
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func (f *FSM) UnlockDepositsAction(ctx context.Context,
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_ fsm.EventContext) fsm.EventType {
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err := f.cfg.DepositManager.TransitionDeposits(
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ctx, f.loopIn.Deposits, fsm.OnError, deposit.Deposited,
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)
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if err != nil {
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err = fmt.Errorf("unable to unlock deposits: %w", err)
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f.cancelSwapInvoice()
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err := f.unlockDeposits(ctx)
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if err != nil {
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return f.HandleError(err)
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}
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return fsm.OnError
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}
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func (f *FSM) unlockDeposits(ctx context.Context) error {
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err := f.cfg.DepositManager.TransitionDeposits(
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ctx, f.loopIn.Deposits, fsm.OnError, deposit.Deposited,
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)
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if err != nil {
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return fmt.Errorf("unable to unlock deposits: %w", err)
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}
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return nil
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}
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// createAndPublishHtlcTimeoutSweepTx creates and publishes the htlc timeout
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// sweep transaction.
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func (f *FSM) createAndPublishHtlcTimeoutSweepTx(ctx context.Context) error {
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@ -270,6 +270,192 @@ func testValidateLoopInContract(_ int32, _ int32) error {
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return nil
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}
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// TestInitHtlcActionCancelsInvoiceOnServerError verifies that an invoice
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// created before a server-side rejection is canceled immediately.
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func TestInitHtlcActionCancelsInvoiceOnServerError(t *testing.T) {
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ctx, cancel := context.WithTimeout(t.Context(), 5*time.Second)
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defer cancel()
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mockLnd := test.NewMockLnd()
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loopIn := &StaticAddressLoopIn{
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Deposits: []*deposit.Deposit{{
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Value: 200_000,
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}},
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InitiationHeight: uint32(mockLnd.Height),
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InitiationTime: time.Now(),
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PaymentTimeoutSeconds: DefaultPaymentTimeoutSeconds,
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ProtocolVersion: version.ProtocolVersion_V0,
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}
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cfg := &Config{
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AddressManager: &mockAddressManager{
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params: &script.Parameters{
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ProtocolVersion: version.ProtocolVersion_V0,
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},
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},
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DepositManager: &noopDepositManager{},
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WalletKit: mockLnd.WalletKit,
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LndClient: mockLnd.Client,
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InvoicesClient: mockLnd.LndServices.Invoices,
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Server: &initHtlcTestServer{
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loopInErr: errors.New("server rejected swap"),
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},
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}
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f, err := NewFSM(ctx, loopIn, cfg, false)
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require.NoError(t, err)
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// The init step should fail and synchronously trigger deferred invoice
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// cleanup.
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event := f.InitHtlcAction(ctx, nil)
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require.Equal(t, fsm.OnError, event)
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select {
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case hash := <-mockLnd.FailInvoiceChannel:
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require.Equal(t, loopIn.SwapHash, hash)
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case <-ctx.Done():
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t.Fatalf("invoice was not canceled: %v", ctx.Err())
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}
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}
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// TestInitHtlcActionCancelsInvoiceOnFeeGuardFailure verifies that the early
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// fee guard also cancels the pre-created invoice before returning an error.
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func TestInitHtlcActionCancelsInvoiceOnFeeGuardFailure(t *testing.T) {
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ctx, cancel := context.WithTimeout(t.Context(), 5*time.Second)
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defer cancel()
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mockLnd := test.NewMockLnd()
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serverKey, err := btcec.NewPrivateKey()
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require.NoError(t, err)
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loopIn := &StaticAddressLoopIn{
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Deposits: []*deposit.Deposit{{
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Value: 200_000,
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}},
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InitiationHeight: uint32(mockLnd.Height),
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InitiationTime: time.Now(),
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PaymentTimeoutSeconds: DefaultPaymentTimeoutSeconds,
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ProtocolVersion: version.ProtocolVersion_V0,
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}
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cfg := &Config{
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AddressManager: &mockAddressManager{
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params: &script.Parameters{
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ProtocolVersion: version.ProtocolVersion_V0,
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},
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},
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DepositManager: &noopDepositManager{},
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WalletKit: mockLnd.WalletKit,
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LndClient: mockLnd.Client,
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InvoicesClient: mockLnd.LndServices.Invoices,
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Server: &initHtlcTestServer{
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loopInResp: &swapserverrpc.ServerStaticAddressLoopInResponse{
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HtlcServerPubKey: serverKey.PubKey().
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SerializeCompressed(),
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HtlcExpiry: mockLnd.Height +
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DefaultLoopInOnChainCltvDelta,
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StandardHtlcInfo: &swapserverrpc.ServerHtlcSigningInfo{
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FeeRate: 1_000_000,
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},
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HighFeeHtlcInfo: &swapserverrpc.ServerHtlcSigningInfo{},
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ExtremeFeeHtlcInfo: &swapserverrpc.
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ServerHtlcSigningInfo{},
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},
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},
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ValidateLoopInContract: func(int32, int32) error {
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return nil
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},
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MaxStaticAddrHtlcFeePercentage: 0,
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MaxStaticAddrHtlcBackupFeePercentage: 1,
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}
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f, err := NewFSM(ctx, loopIn, cfg, false)
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require.NoError(t, err)
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// The fee guard runs before persistence, so the deferred cleanup must
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// cancel the invoice on this error path as well.
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event := f.InitHtlcAction(ctx, nil)
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require.Equal(t, fsm.OnError, event)
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select {
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case hash := <-mockLnd.FailInvoiceChannel:
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require.Equal(t, loopIn.SwapHash, hash)
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case <-ctx.Done():
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t.Fatalf("invoice was not canceled: %v", ctx.Err())
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}
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}
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// TestUnlockDepositsActionCancelsInvoice verifies that stored swaps that enter
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// the generic error unlock path also clean up their swap invoice.
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func TestUnlockDepositsActionCancelsInvoice(t *testing.T) {
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ctx, cancel := context.WithTimeout(t.Context(), 5*time.Second)
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defer cancel()
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mockLnd := test.NewMockLnd()
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dep := &deposit.Deposit{
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Value: 200_000,
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}
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swapHash := lntypes.Hash{0x44, 0x55}
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depositMgr := &recordingDepositManager{}
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f := &FSM{
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StateMachine: &fsm.StateMachine{},
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cfg: &Config{
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DepositManager: depositMgr,
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InvoicesClient: mockLnd.LndServices.Invoices,
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},
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loopIn: &StaticAddressLoopIn{
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SwapHash: swapHash,
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SwapInvoice: "lnbc1test",
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Deposits: []*deposit.Deposit{dep},
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},
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}
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event := f.UnlockDepositsAction(ctx, nil)
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require.Equal(t, fsm.OnError, event)
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require.NoError(t, f.LastActionError)
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select {
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case hash := <-mockLnd.FailInvoiceChannel:
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require.Equal(t, swapHash, hash)
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case <-ctx.Done():
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t.Fatalf("invoice was not canceled: %v", ctx.Err())
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}
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require.Len(t, depositMgr.transitions, 1)
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require.Equal(t, []*deposit.Deposit{dep}, depositMgr.transitions[0].deposits)
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require.Equal(t, fsm.OnError, depositMgr.transitions[0].event)
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require.Equal(t, deposit.Deposited, depositMgr.transitions[0].state)
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}
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// TestUnlockDepositsActionReportsTransitionError ensures the unlock path
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// preserves the real deposit transition failure for callers that need to log it.
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func TestUnlockDepositsActionReportsTransitionError(t *testing.T) {
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depositMgr := &recordingDepositManager{
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err: errors.New("transition failed"),
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}
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f := &FSM{
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StateMachine: &fsm.StateMachine{},
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cfg: &Config{
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DepositManager: depositMgr,
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},
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loopIn: &StaticAddressLoopIn{
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Deposits: []*deposit.Deposit{{Value: 200_000}},
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},
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}
|
||||
|
||||
event := f.UnlockDepositsAction(t.Context(), nil)
|
||||
require.Equal(t, fsm.OnError, event)
|
||||
require.ErrorContains(
|
||||
t, f.LastActionError, "unable to unlock deposits",
|
||||
)
|
||||
require.ErrorContains(t, f.LastActionError, "transition failed")
|
||||
}
|
||||
|
||||
// mockAddressManager is a minimal AddressManager implementation used by the
|
||||
// test FSM setup.
|
||||
type mockAddressManager struct {
|
||||
|
|
@ -327,3 +513,56 @@ func (n *noopDepositManager) GetActiveDepositsInState(fsm.StateType) (
|
|||
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
type depositTransition struct {
|
||||
deposits []*deposit.Deposit
|
||||
event fsm.EventType
|
||||
state fsm.StateType
|
||||
}
|
||||
|
||||
type recordingDepositManager struct {
|
||||
noopDepositManager
|
||||
|
||||
err error
|
||||
transitions []depositTransition
|
||||
}
|
||||
|
||||
// TransitionDeposits records the transition and returns the configured error.
|
||||
func (r *recordingDepositManager) TransitionDeposits(_ context.Context,
|
||||
deposits []*deposit.Deposit, event fsm.EventType,
|
||||
state fsm.StateType) error {
|
||||
|
||||
r.transitions = append(r.transitions, depositTransition{
|
||||
deposits: deposits,
|
||||
event: event,
|
||||
state: state,
|
||||
})
|
||||
|
||||
return r.err
|
||||
}
|
||||
|
||||
// initHtlcTestServer lets InitHtlcAction tests inject a deterministic server
|
||||
// response without standing up the full gRPC client.
|
||||
type initHtlcTestServer struct {
|
||||
swapserverrpc.StaticAddressServerClient
|
||||
|
||||
loopInResp *swapserverrpc.ServerStaticAddressLoopInResponse
|
||||
loopInErr error
|
||||
}
|
||||
|
||||
// ServerStaticAddressLoopIn returns the canned response configured by the test.
|
||||
func (s *initHtlcTestServer) ServerStaticAddressLoopIn(context.Context,
|
||||
*swapserverrpc.ServerStaticAddressLoopInRequest, ...grpc.CallOption,
|
||||
) (*swapserverrpc.ServerStaticAddressLoopInResponse, error) {
|
||||
|
||||
return s.loopInResp, s.loopInErr
|
||||
}
|
||||
|
||||
// PushStaticAddressHtlcSigs accepts the abandonment signal used by error-path
|
||||
// tests without adding additional assertions.
|
||||
func (s *initHtlcTestServer) PushStaticAddressHtlcSigs(context.Context,
|
||||
*swapserverrpc.PushStaticAddressHtlcSigsRequest, ...grpc.CallOption,
|
||||
) (*swapserverrpc.PushStaticAddressHtlcSigsResponse, error) {
|
||||
|
||||
return &swapserverrpc.PushStaticAddressHtlcSigsResponse{}, nil
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue