13236757158

Committed 10 Feb 2025 08:39AM UTC coverage: 57.649% (-1.2%) from 58.815%

Build # 13236757158

Build Type

Pull #9493

github

Committed by

ziggie1984

Commit Message

lncli: for some cmds we don't replace the data of the response.

For some cmds it is not very practical to replace the json output
because we might pipe it into other commands. For example when
creating the route we want to pipe it into sendtoRoute.

Pull Request Pull Request #9493: For some lncli cmds we should not replace the content with other data

Run Details

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19535 existing lines in 252 files now uncovered.

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82.97

/netann/chan_status_manager.go

package netann

import (
        "errors"
        "sync"
        "time"

        "github.com/btcsuite/btcd/btcec/v2"
        "github.com/btcsuite/btcd/wire"
        "github.com/lightningnetwork/lnd/channeldb"
        graphdb "github.com/lightningnetwork/lnd/graph/db"
        "github.com/lightningnetwork/lnd/keychain"
        "github.com/lightningnetwork/lnd/lnwallet"
        "github.com/lightningnetwork/lnd/lnwire"
)

var (
        // ErrChanStatusManagerExiting signals that a shutdown of the
        // ChanStatusManager has already been requested.
        ErrChanStatusManagerExiting = errors.New("chan status manager exiting")

        // ErrInvalidTimeoutConstraints signals that the ChanStatusManager could
        // not be initialized because the timeouts and sample intervals were
        // malformed.
        ErrInvalidTimeoutConstraints = errors.New("chan-enable-timeout + " +
                "chan-status-sample-interval must <= chan-disable-timeout " +
                "and all three chan configs must be positive integers")

        // ErrEnableInactiveChan signals that a request to enable a channel
        // could not be completed because the channel isn't actually active at
        // the time of the request.
        ErrEnableInactiveChan = errors.New("unable to enable channel which " +
                "is not currently active")

        // ErrEnableManuallyDisabledChan signals that an automatic / background
        // request to enable a channel could not be completed because the channel
        // was manually disabled.
        ErrEnableManuallyDisabledChan = errors.New("unable to enable channel " +
                "which was manually disabled")
)

// ChanStatusConfig holds parameters and resources required by the
// ChanStatusManager to perform its duty.
type ChanStatusConfig struct {
        // OurPubKey is the public key identifying this node on the network.
        OurPubKey *btcec.PublicKey

        // OurKeyLoc is the locator for the public key identifying this node on
        // the network.
        OurKeyLoc keychain.KeyLocator

        // MessageSigner signs messages that validate under OurPubKey.
        MessageSigner lnwallet.MessageSigner

        // IsChannelActive checks whether the channel identified by the provided
        // ChannelID is considered active. This should only return true if the
        // channel has been sufficiently confirmed, the channel has received
        // ChannelReady, and the remote peer is online.
        IsChannelActive func(lnwire.ChannelID) bool

        // ApplyChannelUpdate processes new ChannelUpdates signed by our node by
        // updating our local routing table and broadcasting the update to our
        // peers.
        ApplyChannelUpdate func(*lnwire.ChannelUpdate1, *wire.OutPoint,
                bool) error

        // DB stores the set of channels that are to be monitored.
        DB DB

        // Graph stores the channel info and policies for channels in DB.
        Graph ChannelGraph

        // ChanEnableTimeout is the duration a peer's connect must remain stable
        // before attempting to re-enable the channel.
        //
        // NOTE: This value is only used to verify that the relation between
        // itself, ChanDisableTimeout, and ChanStatusSampleInterval is correct.
        // The user is still responsible for ensuring that the same duration
        // elapses before attempting to re-enable a channel.
        ChanEnableTimeout time.Duration

        // ChanDisableTimeout is the duration the manager will wait after
        // detecting that a channel has become inactive before broadcasting an
        // update to disable the channel.
        ChanDisableTimeout time.Duration

        // ChanStatusSampleInterval is the long-polling interval used by the
        // manager to check if the channels being monitored have become
        // inactive.
        ChanStatusSampleInterval time.Duration
}

// ChanStatusManager facilitates requests to enable or disable a channel via a
// network announcement that sets the disable bit on the ChannelUpdate
// accordingly. The manager will periodically sample to detect cases where a
// link has become inactive, and facilitate the process of disabling the channel
// passively. The ChanStatusManager state machine is designed to reduce the
// likelihood of spamming the network with updates for flapping peers.
type ChanStatusManager struct {
        started sync.Once
        stopped sync.Once

        cfg *ChanStatusConfig

        // ourPubKeyBytes is the serialized compressed pubkey of our node.
        ourPubKeyBytes []byte

        // chanStates contains the set of channels being monitored for status
        // updates. Access to the map is serialized by the statusManager's event
        // loop.
        chanStates channelStates

        // enableRequests pipes external requests to enable a channel into the
        // primary event loop.
        enableRequests chan statusRequest

        // disableRequests pipes external requests to disable a channel into the
        // primary event loop.
        disableRequests chan statusRequest

        // autoRequests pipes external requests to restore automatic channel
        // state management into the primary event loop.
        autoRequests chan statusRequest

        // statusSampleTicker fires at the interval prescribed by
        // ChanStatusSampleInterval to check if channels in chanStates have
        // become inactive.
        statusSampleTicker *time.Ticker

        wg   sync.WaitGroup
        quit chan struct{}
}

// NewChanStatusManager initializes a new ChanStatusManager using the given
// configuration. An error is returned if the timeouts and sample interval fail
// to meet do not satisfy the equation:
//
//        ChanEnableTimeout + ChanStatusSampleInterval > ChanDisableTimeout.
func NewChanStatusManager(cfg *ChanStatusConfig) (*ChanStatusManager, error) {
        // Assert that the config timeouts are properly formed. We require the
        // enable_timeout + sample_interval to be less than or equal to the
        // disable_timeout and that all are positive values. A peer that
        // disconnects and reconnects quickly may cause a disable update to be
        // sent, shortly followed by a re-enable. Ensuring a healthy separation
        // helps dampen the possibility of spamming updates that toggle the
        // disable bit for such events.
        if cfg.ChanStatusSampleInterval <= 0 {
                return nil, ErrInvalidTimeoutConstraints
        }
        if cfg.ChanEnableTimeout <= 0 {
                return nil, ErrInvalidTimeoutConstraints
        }
        if cfg.ChanDisableTimeout <= 0 {
                return nil, ErrInvalidTimeoutConstraints
        }
        if cfg.ChanEnableTimeout+cfg.ChanStatusSampleInterval >
                cfg.ChanDisableTimeout {
                return nil, ErrInvalidTimeoutConstraints

        }

        return &ChanStatusManager{
                cfg:                cfg,
                ourPubKeyBytes:     cfg.OurPubKey.SerializeCompressed(),
                chanStates:         make(channelStates),
                statusSampleTicker: time.NewTicker(cfg.ChanStatusSampleInterval),
                enableRequests:     make(chan statusRequest),
                disableRequests:    make(chan statusRequest),
                autoRequests:       make(chan statusRequest),
                quit:               make(chan struct{}),
        }, nil
}

// Start safely starts the ChanStatusManager.
func (m *ChanStatusManager) Start() error {
        var err error
        m.started.Do(func() {
                log.Info("Channel Status Manager starting")
                err = m.start()
        })
        return err
}

func (m *ChanStatusManager) start() error {
        channels, err := m.fetchChannels()
        if err != nil {
                return err
        }

        // Populate the initial states of all confirmed, public channels.
        for _, c := range channels {
                _, err := m.getOrInitChanStatus(c.FundingOutpoint)
                switch {

                // If we can't retrieve the edge info for this channel, it may
                // have been pruned from the channel graph but not yet from our
                // set of channels. We'll skip it as we can't determine its
                // initial state.
                case errors.Is(err, graphdb.ErrEdgeNotFound):
                        log.Warnf("Unable to find channel policies for %v, "+
                                "skipping. This is typical if the channel is "+
                                "in the process of closing.", c.FundingOutpoint)
                        continue

                // If we are in the process of opening a channel, the funding
                // manager might not have added the ChannelUpdate to the graph
                // yet. We'll ignore the channel for now.
                case err == ErrUnableToExtractChanUpdate:
                        log.Warnf("Unable to find channel policies for %v, "+
                                "skipping. This is typical if the channel is "+
                                "in the process of being opened.",
                                c.FundingOutpoint)
                        continue

                case err != nil:
                        return err
                }
        }

        m.wg.Add(1)
        go m.statusManager()

        return nil
}

// Stop safely shuts down the ChanStatusManager.
func (m *ChanStatusManager) Stop() error {
        m.stopped.Do(func() {
                log.Info("Channel Status Manager shutting down...")
                defer log.Debug("Channel Status Manager shutdown complete")

                close(m.quit)
                m.wg.Wait()
        })
        return nil
}

// RequestEnable submits a request to immediately enable a channel identified by
// the provided outpoint. If the channel is already enabled, no action will be
// taken. If the channel is marked pending-disable the channel will be returned
// to an active status as the scheduled disable was never sent. Otherwise if the
// channel is found to be disabled, a new announcement will be signed with the
// disabled bit cleared and broadcast to the network.
//
// If the channel was manually disabled and RequestEnable is called with
// manual = false, then the request will be ignored.
//
// NOTE: RequestEnable should only be called after a stable connection with the
// channel's peer has lasted at least the ChanEnableTimeout. Failure to do so
// may result in behavior that deviates from the expected behavior of the state
// machine.
func (m *ChanStatusManager) RequestEnable(outpoint wire.OutPoint,
        manual bool) error {

        return m.submitRequest(m.enableRequests, outpoint, manual)
}

// RequestDisable submits a request to immediately disable a channel identified
// by the provided outpoint. If the channel is already disabled, no action will
// be taken. Otherwise, a new announcement will be signed with the disabled bit
// set and broadcast to the network.
//
// The channel state will be changed to either ChanStatusDisabled or
// ChanStatusManuallyDisabled, depending on the passed-in value of manual. In
// particular, note the following state transitions:
//
//        current state    | manual | new state
//        ---------------------------------------------------
//        Disabled         | false  | Disabled
//        ManuallyDisabled | false  | ManuallyDisabled (*)
//        Disabled         | true   | ManuallyDisabled
//        ManuallyDisabled | true   | ManuallyDisabled
//
// (*) If a channel was manually disabled, subsequent automatic / background
//
//        requests to disable the channel do not change the fact that the channel
//        was manually disabled.
func (m *ChanStatusManager) RequestDisable(outpoint wire.OutPoint,
        manual bool) error {

        return m.submitRequest(m.disableRequests, outpoint, manual)
}

// RequestAuto submits a request to restore automatic channel state management.
// If the channel is in the state ChanStatusManuallyDisabled, it will be moved
// back to the state ChanStatusDisabled. Otherwise, no action will be taken.
func (m *ChanStatusManager) RequestAuto(outpoint wire.OutPoint) error {
        return m.submitRequest(m.autoRequests, outpoint, true)
}

// statusRequest is passed to the statusManager to request a change in status
// for a particular channel point.  The exact action is governed by passing the
// request through one of the enableRequests or disableRequests channels.
type statusRequest struct {
        outpoint wire.OutPoint
        manual   bool
        errChan  chan error
}

// submitRequest sends a request for either enabling or disabling a particular
// outpoint and awaits an error response. The request type is dictated by the
// reqChan passed in, which can be either of the enableRequests or
// disableRequests channels.
func (m *ChanStatusManager) submitRequest(reqChan chan statusRequest,
        outpoint wire.OutPoint, manual bool) error {

        req := statusRequest{
                outpoint: outpoint,
                manual:   manual,
                errChan:  make(chan error, 1),
        }

        select {
        case reqChan <- req:
        case <-m.quit:
                return ErrChanStatusManagerExiting
        }

        select {
        case err := <-req.errChan:
                return err
        case <-m.quit:
                return ErrChanStatusManagerExiting
        }
}

// statusManager is the primary event loop for the ChanStatusManager, providing
// the necessary synchronization primitive to protect access to the chanStates
// map. All requests to explicitly enable or disable a channel are processed
// within this method. The statusManager will also periodically poll the active
// status of channels within the htlcswitch to see if a disable announcement
// should be scheduled or broadcast.
//
// NOTE: This method MUST be run as a goroutine.
func (m *ChanStatusManager) statusManager() {
        defer m.wg.Done()

        for {
                select {

                // Process any requests to mark channel as enabled.
                case req := <-m.enableRequests:
                        req.errChan <- m.processEnableRequest(req.outpoint, req.manual)

                // Process any requests to mark channel as disabled.
                case req := <-m.disableRequests:
                        req.errChan <- m.processDisableRequest(req.outpoint, req.manual)

                // Process any requests to restore automatic channel state management.
                case req := <-m.autoRequests:
                        req.errChan <- m.processAutoRequest(req.outpoint)

                // Use long-polling to detect when channels become inactive.
                case <-m.statusSampleTicker.C:
                        // First, do a sweep and mark any ChanStatusEnabled
                        // channels that are not active within the htlcswitch as
                        // ChanStatusPendingDisabled. The channel will then be
                        // disabled if no request to enable is received before
                        // the ChanDisableTimeout expires.
                        m.markPendingInactiveChannels()

                        // Now, do another sweep to disable any channels that
                        // were marked in a prior iteration as pending inactive
                        // if the inactive chan timeout has elapsed.
                        m.disableInactiveChannels()

                case <-m.quit:
                        return
                }
        }
}

// processEnableRequest attempts to enable the given outpoint.
//
//   - If the channel is not active at the time of the request,
//     ErrEnableInactiveChan will be returned.
//   - If the channel was in the ManuallyDisabled state and manual = false,
//     the request will be ignored and ErrEnableManuallyDisabledChan will be
//     returned.
//   - Otherwise, the status of the channel in chanStates will be
//     ChanStatusEnabled and the method will return nil.
//
// An update will be broadcast only if the channel is currently disabled,
// otherwise no update will be sent on the network.
func (m *ChanStatusManager) processEnableRequest(outpoint wire.OutPoint,
        manual bool) error {

        curState, err := m.getOrInitChanStatus(outpoint)
        if err != nil {
                return err
        }

        // Quickly check to see if the requested channel is active within the
        // htlcswitch and return an error if it isn't.
        chanID := lnwire.NewChanIDFromOutPoint(outpoint)
        if !m.cfg.IsChannelActive(chanID) {
                return ErrEnableInactiveChan
        }

        switch curState.Status {

        // Channel is already enabled, nothing to do.
        case ChanStatusEnabled:
                log.Debugf("Channel(%v) already enabled, skipped "+
                        "announcement", outpoint)

                return nil

        // The channel is enabled, though we are now canceling the scheduled
        // disable.
        case ChanStatusPendingDisabled:
                log.Debugf("Channel(%v) already enabled, canceling scheduled "+
                        "disable", outpoint)

        // We'll sign a new update if the channel is still disabled.
        case ChanStatusManuallyDisabled:
                if !manual {
                        return ErrEnableManuallyDisabledChan
                }
                fallthrough

        case ChanStatusDisabled:
                log.Infof("Announcing channel(%v) enabled", outpoint)

                err := m.signAndSendNextUpdate(outpoint, false)
                if err != nil {
                        return err
                }
        }

        m.chanStates.markEnabled(outpoint)

        return nil
}

// processDisableRequest attempts to disable the given outpoint. If the method
// returns nil, the status of the channel in chanStates will be either
// ChanStatusDisabled or ChanStatusManuallyDisabled, depending on the
// passed-in value of manual.
//
// An update will only be sent if the channel has a status other than
// ChanStatusEnabled, otherwise no update will be sent on the network.
func (m *ChanStatusManager) processDisableRequest(outpoint wire.OutPoint,
        manual bool) error {

        curState, err := m.getOrInitChanStatus(outpoint)
        if err != nil {
                return err
        }

        status := curState.Status
        if status == ChanStatusEnabled || status == ChanStatusPendingDisabled {
                log.Infof("Announcing channel(%v) disabled [requested]",
                        outpoint)

                err := m.signAndSendNextUpdate(outpoint, true)
                if err != nil {
                        return err
                }
        }

        // Typically, a request to disable a channel via the manager's public
        // interface signals that the channel is being closed.
        //
        // If we don't need to keep track of a manual request to disable the
        // channel, then we can remove the outpoint to free up space in the map
        // of channel states. If for some reason the channel isn't closed, the
        // state will be repopulated on subsequent calls to the manager's public
        // interface via a db lookup, or on startup.
        if manual {
                m.chanStates.markManuallyDisabled(outpoint)
        } else if status != ChanStatusManuallyDisabled {
                delete(m.chanStates, outpoint)
        }

        return nil
}

// processAutoRequest attempts to restore automatic channel state management
// for the given outpoint. If the method returns nil, the state of the channel
// will no longer be ChanStatusManuallyDisabled (currently the only state in
// which automatic / background requests are ignored).
//
// No update will be sent on the network.
func (m *ChanStatusManager) processAutoRequest(outpoint wire.OutPoint) error {
        curState, err := m.getOrInitChanStatus(outpoint)
        if err != nil {
                return err
        }

        if curState.Status == ChanStatusManuallyDisabled {
                log.Debugf("Restoring automatic control for manually disabled "+
                        "channel(%v)", outpoint)

                m.chanStates.markDisabled(outpoint)
        }
        return nil
}

// markPendingInactiveChannels performs a sweep of the database's active
// channels and determines which, if any, should have a disable announcement
// scheduled. Once an active channel is determined to be pending-inactive, one
// of two transitions can follow. Either the channel is disabled because no
// request to enable is received before the scheduled disable is broadcast, or
// the channel is successfully re-enabled and channel is returned to an active
// state from the POV of the ChanStatusManager.
func (m *ChanStatusManager) markPendingInactiveChannels() {
        channels, err := m.fetchChannels()
        if err != nil {
                log.Errorf("Unable to load active channels: %v", err)
                return
        }

        for _, c := range channels {
                // Determine the initial status of the active channel, and
                // populate the entry in the chanStates map.
                curState, err := m.getOrInitChanStatus(c.FundingOutpoint)
                if err != nil {
                        log.Errorf("Unable to retrieve chan status for "+
                                "Channel(%v): %v", c.FundingOutpoint, err)
                        continue
                }

                // If the channel's status is not ChanStatusEnabled, we are
                // done.  Either it is already disabled, or it has been marked
                // ChanStatusPendingDisable meaning that we have already
                // scheduled the time at which it will be disabled.
                if curState.Status != ChanStatusEnabled {
                        continue
                }

                // If our bookkeeping shows the channel as active, sample the
                // htlcswitch to see if it believes the link is also active. If
                // so, we will skip marking it as ChanStatusPendingDisabled.
                chanID := lnwire.NewChanIDFromOutPoint(c.FundingOutpoint)
                if m.cfg.IsChannelActive(chanID) {
                        continue
                }

                // Otherwise, we discovered that this link was inactive within
                // the switch. Compute the time at which we will send out a
                // disable if the peer is unable to reestablish a stable
                // connection.
                disableTime := time.Now().Add(m.cfg.ChanDisableTimeout)

                log.Debugf("Marking channel(%v) pending-inactive",
                        c.FundingOutpoint)

                m.chanStates.markPendingDisabled(c.FundingOutpoint, disableTime)
        }
}

// disableInactiveChannels scans through the set of monitored channels, and
// broadcast a disable update for any pending inactive channels whose
// SendDisableTime has been superseded by the current time.
func (m *ChanStatusManager) disableInactiveChannels() {
        // Now, disable any channels whose inactive chan timeout has elapsed.
        now := time.Now()
        for outpoint, state := range m.chanStates {
                // Ignore statuses that are not in the pending-inactive state.
                if state.Status != ChanStatusPendingDisabled {
                        continue
                }

                // Ignore statuses for which the disable timeout has not
                // expired.
                if state.SendDisableTime.After(now) {
                        continue
                }

                log.Infof("Announcing channel(%v) disabled "+
                        "[detected]", outpoint)

                // Sign an update disabling the channel.
                err := m.signAndSendNextUpdate(outpoint, true)
                if err != nil {
                        log.Errorf("Unable to sign update disabling "+
                                "channel(%v): %v", outpoint, err)

                        // If the edge was not found, this is a likely indicator
                        // that the channel has been closed. Thus we remove the
                        // outpoint from the set of tracked outpoints to prevent
                        // further attempts.
                        if errors.Is(err, graphdb.ErrEdgeNotFound) {
                                log.Debugf("Removing channel(%v) from "+
                                        "consideration for passive disabling",
                                        outpoint)
                                delete(m.chanStates, outpoint)
                        }

                        continue
                }

                // Record that the channel has now been disabled.
                m.chanStates.markDisabled(outpoint)
        }
}

// fetchChannels returns the working set of channels managed by the
// ChanStatusManager. The returned channels are filtered to only contain public
// channels.
func (m *ChanStatusManager) fetchChannels() ([]*channeldb.OpenChannel, error) {
        allChannels, err := m.cfg.DB.FetchAllOpenChannels()
        if err != nil {
                return nil, err
        }

        // Filter out private channels.
        var channels []*channeldb.OpenChannel
        for _, c := range allChannels {
                // We'll skip any private channels, as they aren't used for
                // routing within the network by other nodes.
                if c.ChannelFlags&lnwire.FFAnnounceChannel == 0 {
                        continue
                }

                channels = append(channels, c)
        }

        return channels, nil
}

// signAndSendNextUpdate computes and signs a valid update for the passed
// outpoint, with the ability to toggle the disabled bit. The new update will
// use the current time as the update's timestamp, or increment the old
// timestamp by 1 to ensure the update can propagate. If signing is successful,
// the new update will be sent out on the network.
func (m *ChanStatusManager) signAndSendNextUpdate(outpoint wire.OutPoint,
        disabled bool) error {

        // Retrieve the latest update for this channel. We'll use this
        // as our starting point to send the new update.
        chanUpdate, private, err := m.fetchLastChanUpdateByOutPoint(outpoint)
        if err != nil {
                return err
        }

        err = SignChannelUpdate(
                m.cfg.MessageSigner, m.cfg.OurKeyLoc, chanUpdate,
                ChanUpdSetDisable(disabled), ChanUpdSetTimestamp,
        )
        if err != nil {
                return err
        }

        return m.cfg.ApplyChannelUpdate(chanUpdate, &outpoint, private)
}

// fetchLastChanUpdateByOutPoint fetches the latest policy for our direction of
// a channel, and crafts a new ChannelUpdate with this policy. Returns an error
// in case our ChannelEdgePolicy is not found in the database. Also returns if
// the channel is private by checking AuthProof for nil.
func (m *ChanStatusManager) fetchLastChanUpdateByOutPoint(op wire.OutPoint) (
        *lnwire.ChannelUpdate1, bool, error) {

        // Get the edge info and policies for this channel from the graph.
        info, edge1, edge2, err := m.cfg.Graph.FetchChannelEdgesByOutpoint(&op)
        if err != nil {
                return nil, false, err
        }

        update, err := ExtractChannelUpdate(
                m.ourPubKeyBytes, info, edge1, edge2,
        )
        return update, info.AuthProof == nil, err
}

// loadInitialChanState determines the initial ChannelState for a particular
// outpoint. The initial ChanStatus for a given outpoint will either be
// ChanStatusEnabled or ChanStatusDisabled, determined by inspecting the bits on
// the most recent announcement. An error is returned if the latest update could
// not be retrieved.
func (m *ChanStatusManager) loadInitialChanState(
        outpoint *wire.OutPoint) (ChannelState, error) {

        lastUpdate, _, err := m.fetchLastChanUpdateByOutPoint(*outpoint)
        if err != nil {
                return ChannelState{}, err
        }

        // Determine the channel's starting status by inspecting the disable bit
        // on last announcement we sent out.
        var initialStatus ChanStatus
        if lastUpdate.ChannelFlags&lnwire.ChanUpdateDisabled == 0 {
                initialStatus = ChanStatusEnabled
        } else {
                initialStatus = ChanStatusDisabled
        }

        return ChannelState{
                Status: initialStatus,
        }, nil
}

// getOrInitChanStatus retrieves the current ChannelState for a particular
// outpoint. If the chanStates map already contains an entry for the outpoint,
// the value in the map is returned. Otherwise, the outpoint's initial status is
// computed and updated in the chanStates map before being returned.
func (m *ChanStatusManager) getOrInitChanStatus(
        outpoint wire.OutPoint) (ChannelState, error) {

        // Return the current ChannelState from the chanStates map if it is
        // already known to the ChanStatusManager.
        if curState, ok := m.chanStates[outpoint]; ok {
                return curState, nil
        }

        // Otherwise, determine the initial state based on the last update we
        // sent for the outpoint.
        initialState, err := m.loadInitialChanState(&outpoint)
        if err != nil {
                return ChannelState{}, err
        }

        // Finally, store the initial state in the chanStates map. This will
        // serve as are up-to-date view of the outpoint's current status, in
        // addition to making the channel eligible for detecting inactivity.
        m.chanStates[outpoint] = initialState

        return initialState, nil
}

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