14193549836

Committed 01 Apr 2025 10:40AM UTC coverage: 69.046% (+0.007%) from 69.039%

Build # 14193549836

Build Type

Pull #9665

github

Committed by

web-flow

Commit Message

Merge e8825f209 into b01f4e514

Pull Request Pull Request #9665: kvdb: bump etcd libs to v3.5.12

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77.14

/accessman.go

package lnd

import (
        "fmt"
        "maps"
        "sync"

        "github.com/btcsuite/btcd/btcec/v2"
        "github.com/lightningnetwork/lnd/channeldb"
)

// accessMan is responsible for managing the server's access permissions.
type accessMan struct {
        cfg *accessManConfig

        // banScoreMtx is used for the server's ban tracking. If the server
        // mutex is also going to be locked, ensure that this is locked after
        // the server mutex.
        banScoreMtx sync.RWMutex

        // peerCounts is a mapping from remote public key to {bool, uint64}
        // where the bool indicates that we have an open/closed channel with
        // the peer and where the uint64 indicates the number of pending-open
        // channels we currently have with them. This mapping will be used to
        // determine access permissions for the peer. The map key is the
        // string-version of the serialized public key.
        //
        // NOTE: This MUST be accessed with the banScoreMtx held.
        peerCounts map[string]channeldb.ChanCount

        // peerScores stores each connected peer's access status. The map key
        // is the string-version of the serialized public key.
        //
        // NOTE: This MUST be accessed with the banScoreMtx held.
        peerScores map[string]peerSlotStatus

        // numRestricted tracks the number of peers with restricted access in
        // peerScores. This MUST be accessed with the banScoreMtx held.
        numRestricted int64
}

type accessManConfig struct {
        // initAccessPerms checks the channeldb for initial access permissions
        // and then populates the peerCounts and peerScores maps.
        initAccessPerms func() (map[string]channeldb.ChanCount, error)

        // shouldDisconnect determines whether we should disconnect a peer or
        // not.
        shouldDisconnect func(*btcec.PublicKey) (bool, error)

        // maxRestrictedSlots is the number of restricted slots we'll allocate.
        maxRestrictedSlots int64
}

func newAccessMan(cfg *accessManConfig) (*accessMan, error) {
        a := &accessMan{
                cfg:        cfg,
                peerCounts: make(map[string]channeldb.ChanCount),
                peerScores: make(map[string]peerSlotStatus),
        }

        counts, err := a.cfg.initAccessPerms()
        if err != nil {
                return nil, err
        }

        // We'll populate the server's peerCounts map with the counts fetched
        // via initAccessPerms. Also note that we haven't yet connected to the
        // peers.
        maps.Copy(a.peerCounts, counts)

        return a, nil
}

// assignPeerPerms assigns a new peer its permissions. This does not track the
// access in the maps. This is intentional.
func (a *accessMan) assignPeerPerms(remotePub *btcec.PublicKey) (
        peerAccessStatus, error) {

        // Default is restricted unless the below filters say otherwise.
        access := peerStatusRestricted

        shouldDisconnect, err := a.cfg.shouldDisconnect(remotePub)
        if err != nil {
                // Access is restricted here.
                return access, err
        }

        if shouldDisconnect {
                // Access is restricted here.
                return access, ErrGossiperBan
        }

        peerMapKey := string(remotePub.SerializeCompressed())

        // Lock banScoreMtx for reading so that we can update the banning maps
        // below.
        a.banScoreMtx.RLock()
        defer a.banScoreMtx.RUnlock()

        if count, found := a.peerCounts[peerMapKey]; found {
                if count.HasOpenOrClosedChan {
                        access = peerStatusProtected
                } else if count.PendingOpenCount != 0 {
                        access = peerStatusTemporary
                }
        }

        // If we've reached this point and access hasn't changed from
        // restricted, then we need to check if we even have a slot for this
        // peer.
        if a.numRestricted >= a.cfg.maxRestrictedSlots &&
                access == peerStatusRestricted {

                return access, ErrNoMoreRestrictedAccessSlots
        }

        return access, nil
}

// newPendingOpenChan is called after the pending-open channel has been
// committed to the database. This may transition a restricted-access peer to a
// temporary-access peer.
func (a *accessMan) newPendingOpenChan(remotePub *btcec.PublicKey) error {
        a.banScoreMtx.Lock()
        defer a.banScoreMtx.Unlock()

        peerMapKey := string(remotePub.SerializeCompressed())

        // Fetch the peer's access status from peerScores.
        status, found := a.peerScores[peerMapKey]
        if !found {
                // If we didn't find the peer, we'll return an error.
                return ErrNoPeerScore
        }

        switch status.state {
        case peerStatusProtected:
                // If this peer's access status is protected, we don't need to
                // do anything.
                return nil

        case peerStatusTemporary:
                // If this peer's access status is temporary, we'll need to
                // update the peerCounts map. The peer's access status will
                // stay temporary.
                peerCount, found := a.peerCounts[peerMapKey]
                if !found {
                        // Error if we did not find any info in peerCounts.
                        return ErrNoPendingPeerInfo
                }

                // Increment the pending channel amount.
                peerCount.PendingOpenCount += 1
                a.peerCounts[peerMapKey] = peerCount

        case peerStatusRestricted:
                // If the peer's access status is restricted, then we can
                // transition it to a temporary-access peer. We'll need to
                // update numRestricted and also peerScores. We'll also need to
                // update peerCounts.
                peerCount := channeldb.ChanCount{
                        HasOpenOrClosedChan: false,
                        PendingOpenCount:    1,
                }

                a.peerCounts[peerMapKey] = peerCount

                // A restricted-access slot has opened up.
                a.numRestricted -= 1

                a.peerScores[peerMapKey] = peerSlotStatus{
                        state: peerStatusTemporary,
                }

        default:
                // This should not be possible.
                return fmt.Errorf("invalid peer access status")
        }

        return nil
}

// newPendingCloseChan is called when a pending-open channel prematurely closes
// before the funding transaction has confirmed. This potentially demotes a
// temporary-access peer to a restricted-access peer. If no restricted-access
// slots are available, the peer will be disconnected.
func (a *accessMan) newPendingCloseChan(remotePub *btcec.PublicKey) error {
        a.banScoreMtx.Lock()
        defer a.banScoreMtx.Unlock()

        peerMapKey := string(remotePub.SerializeCompressed())

        // Fetch the peer's access status from peerScores.
        status, found := a.peerScores[peerMapKey]
        if !found {
                return ErrNoPeerScore
        }

        switch status.state {
        case peerStatusProtected:
                // If this peer is protected, we don't do anything.
                return nil

        case peerStatusTemporary:
                // If this peer is temporary, we need to check if it will
                // revert to a restricted-access peer.
                peerCount, found := a.peerCounts[peerMapKey]
                if !found {
                        // Error if we did not find any info in peerCounts.
                        return ErrNoPendingPeerInfo
                }

                currentNumPending := peerCount.PendingOpenCount - 1
                if currentNumPending == 0 {
                        // Remove the entry from peerCounts.
                        delete(a.peerCounts, peerMapKey)

                        // If this is the only pending-open channel for this
                        // peer and it's getting removed, attempt to demote
                        // this peer to a restricted peer.
                        if a.numRestricted == a.cfg.maxRestrictedSlots {
                                // There are no available restricted slots, so
                                // we need to disconnect this peer. We leave
                                // this up to the caller.
                                return ErrNoMoreRestrictedAccessSlots
                        }

                        // Otherwise, there is an available restricted-access
                        // slot, so we can demote this peer.
                        a.peerScores[peerMapKey] = peerSlotStatus{
                                state: peerStatusRestricted,
                        }

                        // Update numRestricted.
                        a.numRestricted++

                        return nil
                }

                // Else, we don't need to demote this peer since it has other
                // pending-open channels with us.
                peerCount.PendingOpenCount = currentNumPending
                a.peerCounts[peerMapKey] = peerCount

                return nil

        case peerStatusRestricted:
                // This should not be possible. This indicates an error.
                return fmt.Errorf("invalid peer access state transition")

        default:
                // This should not be possible.
                return fmt.Errorf("invalid peer access status")
        }
}

// newOpenChan is called when a pending-open channel becomes an open channel
// (i.e. the funding transaction has confirmed). If the remote peer is a
// temporary-access peer, it will be promoted to a protected-access peer.
func (a *accessMan) newOpenChan(remotePub *btcec.PublicKey) error {
        a.banScoreMtx.Lock()
        defer a.banScoreMtx.Unlock()

        peerMapKey := string(remotePub.SerializeCompressed())

        // Fetch the peer's access status from peerScores.
        status, found := a.peerScores[peerMapKey]
        if !found {
                // If we didn't find the peer, we'll return an error.
                return ErrNoPeerScore
        }

        switch status.state {
        case peerStatusProtected:
                // If the peer's state is already protected, we don't need to
                // do anything more.
                return nil

        case peerStatusTemporary:
                // If the peer's state is temporary, we'll upgrade the peer to
                // a protected peer.
                peerCount, found := a.peerCounts[peerMapKey]
                if !found {
                        // Error if we did not find any info in peerCounts.
                        return ErrNoPendingPeerInfo
                }

                peerCount.HasOpenOrClosedChan = true
                a.peerCounts[peerMapKey] = peerCount

                newStatus := peerSlotStatus{
                        state: peerStatusProtected,
                }
                a.peerScores[peerMapKey] = newStatus

                return nil

        case peerStatusRestricted:
                // This should not be possible. For the server to receive a
                // state-transition event via NewOpenChan, the server must have
                // previously granted this peer "temporary" access. This
                // temporary access would not have been revoked or downgraded
                // without `CloseChannel` being called with the pending
                // argument set to true. This means that an open-channel state
                // transition would be impossible. Therefore, we can return an
                // error.
                return fmt.Errorf("invalid peer access status")

        default:
                // This should not be possible.
                return fmt.Errorf("invalid peer access status")
        }
}

// checkIncomingConnBanScore checks whether, given the remote's public hex-
// encoded key, we should not accept this incoming connection or immediately
// disconnect. This does not assign to the server's peerScores maps. This is
// just an inbound filter that the brontide listeners use.
func (a *accessMan) checkIncomingConnBanScore(remotePub *btcec.PublicKey) (
        bool, error) {

        a.banScoreMtx.RLock()
        defer a.banScoreMtx.RUnlock()

        peerMapKey := string(remotePub.SerializeCompressed())

        if _, found := a.peerCounts[peerMapKey]; !found {
                // Check numRestricted to see if there is an available slot. In
                // the future, it's possible to add better heuristics.
                if a.numRestricted < a.cfg.maxRestrictedSlots {
                        // There is an available slot.
                        return true, nil
                }

                // If there are no slots left, then we reject this connection.
                return false, ErrNoMoreRestrictedAccessSlots
        }

        // Else, the peer is either protected or temporary.
        return true, nil
}

// addPeerAccess tracks a peer's access in the maps. This should be called when
// the peer has fully connected.
func (a *accessMan) addPeerAccess(remotePub *btcec.PublicKey,
        access peerAccessStatus) {

        // Add the remote public key to peerScores.
        a.banScoreMtx.Lock()
        defer a.banScoreMtx.Unlock()

        peerMapKey := string(remotePub.SerializeCompressed())

        a.peerScores[peerMapKey] = peerSlotStatus{state: access}

        // Increment numRestricted.
        if access == peerStatusRestricted {
                a.numRestricted++
        }
}

// removePeerAccess removes the peer's access from the maps. This should be
// called when the peer has been disconnected.
func (a *accessMan) removePeerAccess(remotePub *btcec.PublicKey) {
        a.banScoreMtx.Lock()
        defer a.banScoreMtx.Unlock()

        peerMapKey := string(remotePub.SerializeCompressed())

        status, found := a.peerScores[peerMapKey]
        if !found {
                return
        }

        if status.state == peerStatusRestricted {
                // If the status is restricted, then we decrement from
                // numRestrictedSlots.
                a.numRestricted--
        }

        delete(a.peerScores, peerMapKey)
}

1	package lnd
2
3	import (
4	"fmt"
5	"maps"
6	"sync"
7
8	"github.com/btcsuite/btcd/btcec/v2"
9	"github.com/lightningnetwork/lnd/channeldb"
10	)
11
12	// accessMan is responsible for managing the server's access permissions.
13	type accessMan struct {
14	cfg *accessManConfig
15
16	// banScoreMtx is used for the server's ban tracking. If the server
17	// mutex is also going to be locked, ensure that this is locked after
18	// the server mutex.
19	banScoreMtx sync.RWMutex
20
21	// peerCounts is a mapping from remote public key to {bool, uint64}
22	// where the bool indicates that we have an open/closed channel with
23	// the peer and where the uint64 indicates the number of pending-open
24	// channels we currently have with them. This mapping will be used to
25	// determine access permissions for the peer. The map key is the
26	// string-version of the serialized public key.
27	//
28	// NOTE: This MUST be accessed with the banScoreMtx held.
29	peerCounts map[string]channeldb.ChanCount
30
31	// peerScores stores each connected peer's access status. The map key
32	// is the string-version of the serialized public key.
33	//
34	// NOTE: This MUST be accessed with the banScoreMtx held.
35	peerScores map[string]peerSlotStatus
36
37	// numRestricted tracks the number of peers with restricted access in
38	// peerScores. This MUST be accessed with the banScoreMtx held.
39	numRestricted int64
40	}
41
42	type accessManConfig struct {
43	// initAccessPerms checks the channeldb for initial access permissions
44	// and then populates the peerCounts and peerScores maps.
45	initAccessPerms func() (map[string]channeldb.ChanCount, error)
46
47	// shouldDisconnect determines whether we should disconnect a peer or
48	// not.
49	shouldDisconnect func(*btcec.PublicKey) (bool, error)
50
51	// maxRestrictedSlots is the number of restricted slots we'll allocate.
52	maxRestrictedSlots int64
53	}
54
55	func newAccessMan(cfg accessManConfig) (accessMan, error) {	4✔
56	a := &accessMan{	4✔
57	cfg: cfg,	4✔
58	peerCounts: make(map[string]channeldb.ChanCount),	4✔
59	peerScores: make(map[string]peerSlotStatus),	4✔
60	}	4✔
61		4✔
62	counts, err := a.cfg.initAccessPerms()	4✔
63	if err != nil {	4✔
64	return nil, err	×
65	}	×
66
67	// We'll populate the server's peerCounts map with the counts fetched
68	// via initAccessPerms. Also note that we haven't yet connected to the
69	// peers.
70	maps.Copy(a.peerCounts, counts)	4✔
71		4✔
72	return a, nil	4✔
73	}
74
75	// assignPeerPerms assigns a new peer its permissions. This does not track the
76	// access in the maps. This is intentional.
77	func (a accessMan) assignPeerPerms(remotePub btcec.PublicKey) (
78	peerAccessStatus, error) {	8✔
79		8✔
80	// Default is restricted unless the below filters say otherwise.	8✔
81	access := peerStatusRestricted	8✔
82		8✔
83	shouldDisconnect, err := a.cfg.shouldDisconnect(remotePub)	8✔
84	if err != nil {	8✔
85	// Access is restricted here.	×
86	return access, err	×
87	}	×
88
89	if shouldDisconnect {	8✔
90	// Access is restricted here.	×
91	return access, ErrGossiperBan	×
92	}	×
93
94	peerMapKey := string(remotePub.SerializeCompressed())	8✔
95		8✔
96	// Lock banScoreMtx for reading so that we can update the banning maps	8✔
97	// below.	8✔
98	a.banScoreMtx.RLock()	8✔
99	defer a.banScoreMtx.RUnlock()	8✔
100		8✔
101	if count, found := a.peerCounts[peerMapKey]; found {	14✔
102	if count.HasOpenOrClosedChan {	11✔
103	access = peerStatusProtected	5✔
104	} else if count.PendingOpenCount != 0 {	13✔
105	access = peerStatusTemporary	4✔
106	}	4✔
107	}
108
109	// If we've reached this point and access hasn't changed from
110	// restricted, then we need to check if we even have a slot for this
111	// peer.
112	if a.numRestricted >= a.cfg.maxRestrictedSlots &&	8✔
113	access == peerStatusRestricted {	8✔
114		×
115	return access, ErrNoMoreRestrictedAccessSlots	×
116	}	×
117
118	return access, nil	8✔
119	}
120
121	// newPendingOpenChan is called after the pending-open channel has been
122	// committed to the database. This may transition a restricted-access peer to a
123	// temporary-access peer.
124	func (a accessMan) newPendingOpenChan(remotePub btcec.PublicKey) error {	4✔
125	a.banScoreMtx.Lock()	4✔
126	defer a.banScoreMtx.Unlock()	4✔
127		4✔
128	peerMapKey := string(remotePub.SerializeCompressed())	4✔
129		4✔
130	// Fetch the peer's access status from peerScores.	4✔
131	status, found := a.peerScores[peerMapKey]	4✔
132	if !found {	4✔
133	// If we didn't find the peer, we'll return an error.	×
134	return ErrNoPeerScore	×
135	}	×
136
137	switch status.state {	4✔
138	case peerStatusProtected:	3✔
139	// If this peer's access status is protected, we don't need to	3✔
140	// do anything.	3✔
141	return nil	3✔
142
143	case peerStatusTemporary:	3✔
144	// If this peer's access status is temporary, we'll need to	3✔
145	// update the peerCounts map. The peer's access status will	3✔
146	// stay temporary.	3✔
147	peerCount, found := a.peerCounts[peerMapKey]	3✔
148	if !found {	3✔
149	// Error if we did not find any info in peerCounts.	×
150	return ErrNoPendingPeerInfo	×
151	}	×
152
153	// Increment the pending channel amount.
154	peerCount.PendingOpenCount += 1	3✔
155	a.peerCounts[peerMapKey] = peerCount	3✔
156
157	case peerStatusRestricted:	4✔
158	// If the peer's access status is restricted, then we can	4✔
159	// transition it to a temporary-access peer. We'll need to	4✔
160	// update numRestricted and also peerScores. We'll also need to	4✔
161	// update peerCounts.	4✔
162	peerCount := channeldb.ChanCount{	4✔
163	HasOpenOrClosedChan: false,	4✔
164	PendingOpenCount: 1,	4✔
165	}	4✔
166		4✔
167	a.peerCounts[peerMapKey] = peerCount	4✔
168		4✔
169	// A restricted-access slot has opened up.	4✔
170	a.numRestricted -= 1	4✔
171		4✔
172	a.peerScores[peerMapKey] = peerSlotStatus{	4✔
173	state: peerStatusTemporary,	4✔
174	}	4✔
175
176	default:	×
177	// This should not be possible.	×
178	return fmt.Errorf("invalid peer access status")	×
179	}
180
181	return nil	4✔
182	}
183
184	// newPendingCloseChan is called when a pending-open channel prematurely closes
185	// before the funding transaction has confirmed. This potentially demotes a
186	// temporary-access peer to a restricted-access peer. If no restricted-access
187	// slots are available, the peer will be disconnected.
188	func (a accessMan) newPendingCloseChan(remotePub btcec.PublicKey) error {	4✔
189	a.banScoreMtx.Lock()	4✔
190	defer a.banScoreMtx.Unlock()	4✔
191		4✔
192	peerMapKey := string(remotePub.SerializeCompressed())	4✔
193		4✔
194	// Fetch the peer's access status from peerScores.	4✔
195	status, found := a.peerScores[peerMapKey]	4✔
196	if !found {	4✔
197	return ErrNoPeerScore	×
198	}	×
199
200	switch status.state {	4✔
201	case peerStatusProtected:	×
202	// If this peer is protected, we don't do anything.	×
203	return nil	×
204
205	case peerStatusTemporary:	4✔
206	// If this peer is temporary, we need to check if it will	4✔
207	// revert to a restricted-access peer.	4✔
208	peerCount, found := a.peerCounts[peerMapKey]	4✔
209	if !found {	4✔
210	// Error if we did not find any info in peerCounts.	×
211	return ErrNoPendingPeerInfo	×
212	}	×
213
214	currentNumPending := peerCount.PendingOpenCount - 1	4✔
215	if currentNumPending == 0 {	8✔
216	// Remove the entry from peerCounts.	4✔
217	delete(a.peerCounts, peerMapKey)	4✔
218		4✔
219	// If this is the only pending-open channel for this	4✔
220	// peer and it's getting removed, attempt to demote	4✔
221	// this peer to a restricted peer.	4✔
222	if a.numRestricted == a.cfg.maxRestrictedSlots {	5✔
223	// There are no available restricted slots, so	1✔
224	// we need to disconnect this peer. We leave	1✔
225	// this up to the caller.	1✔
226	return ErrNoMoreRestrictedAccessSlots	1✔
227	}	1✔
228
229	// Otherwise, there is an available restricted-access
230	// slot, so we can demote this peer.
231	a.peerScores[peerMapKey] = peerSlotStatus{	3✔
232	state: peerStatusRestricted,	3✔
233	}	3✔
234		3✔
235	// Update numRestricted.	3✔
236	a.numRestricted++	3✔
237		3✔
238	return nil	3✔
239	}
240
241	// Else, we don't need to demote this peer since it has other
242	// pending-open channels with us.
243	peerCount.PendingOpenCount = currentNumPending	×
244	a.peerCounts[peerMapKey] = peerCount	×
245		×
246	return nil	×
247
248	case peerStatusRestricted:	×
249	// This should not be possible. This indicates an error.	×
250	return fmt.Errorf("invalid peer access state transition")	×
251
252	default:	×
253	// This should not be possible.	×
254	return fmt.Errorf("invalid peer access status")	×
255	}
256	}
257
258	// newOpenChan is called when a pending-open channel becomes an open channel
259	// (i.e. the funding transaction has confirmed). If the remote peer is a
260	// temporary-access peer, it will be promoted to a protected-access peer.
261	func (a accessMan) newOpenChan(remotePub btcec.PublicKey) error {	4✔
262	a.banScoreMtx.Lock()	4✔
263	defer a.banScoreMtx.Unlock()	4✔
264		4✔
265	peerMapKey := string(remotePub.SerializeCompressed())	4✔
266		4✔
267	// Fetch the peer's access status from peerScores.	4✔
268	status, found := a.peerScores[peerMapKey]	4✔
269	if !found {	7✔
270	// If we didn't find the peer, we'll return an error.	3✔
271	return ErrNoPeerScore	3✔
272	}	3✔
273
274	switch status.state {	4✔
275	case peerStatusProtected:	3✔
276	// If the peer's state is already protected, we don't need to	3✔
277	// do anything more.	3✔
278	return nil	3✔
279
280	case peerStatusTemporary:	4✔
281	// If the peer's state is temporary, we'll upgrade the peer to	4✔
282	// a protected peer.	4✔
283	peerCount, found := a.peerCounts[peerMapKey]	4✔
284	if !found {	4✔
285	// Error if we did not find any info in peerCounts.	×
286	return ErrNoPendingPeerInfo	×
287	}	×
288
289	peerCount.HasOpenOrClosedChan = true	4✔
290	a.peerCounts[peerMapKey] = peerCount	4✔
291		4✔
292	newStatus := peerSlotStatus{	4✔
293	state: peerStatusProtected,	4✔
294	}	4✔
295	a.peerScores[peerMapKey] = newStatus	4✔
296		4✔
297	return nil	4✔
298
299	case peerStatusRestricted:	×
300	// This should not be possible. For the server to receive a	×
301	// state-transition event via NewOpenChan, the server must have	×
302	// previously granted this peer "temporary" access. This	×
303	// temporary access would not have been revoked or downgraded	×
304	// without `CloseChannel` being called with the pending	×
305	// argument set to true. This means that an open-channel state	×
306	// transition would be impossible. Therefore, we can return an	×
307	// error.	×
308	return fmt.Errorf("invalid peer access status")	×
309
310	default:	×
311	// This should not be possible.	×
312	return fmt.Errorf("invalid peer access status")	×
313	}
314	}
315
316	// checkIncomingConnBanScore checks whether, given the remote's public hex-
317	// encoded key, we should not accept this incoming connection or immediately
318	// disconnect. This does not assign to the server's peerScores maps. This is
319	// just an inbound filter that the brontide listeners use.
320	func (a accessMan) checkIncomingConnBanScore(remotePub btcec.PublicKey) (
321	bool, error) {	8✔
322		8✔
323	a.banScoreMtx.RLock()	8✔
324	defer a.banScoreMtx.RUnlock()	8✔
325		8✔
326	peerMapKey := string(remotePub.SerializeCompressed())	8✔
327		8✔
328	if _, found := a.peerCounts[peerMapKey]; !found {	13✔
329	// Check numRestricted to see if there is an available slot. In	5✔
330	// the future, it's possible to add better heuristics.	5✔
331	if a.numRestricted < a.cfg.maxRestrictedSlots {	10✔
332	// There is an available slot.	5✔
333	return true, nil	5✔
334	}	5✔
335
336	// If there are no slots left, then we reject this connection.
337	return false, ErrNoMoreRestrictedAccessSlots	3✔
338	}
339
340	// Else, the peer is either protected or temporary.
341	return true, nil	6✔
342	}
343
344	// addPeerAccess tracks a peer's access in the maps. This should be called when
345	// the peer has fully connected.
346	func (a accessMan) addPeerAccess(remotePub btcec.PublicKey,
347	access peerAccessStatus) {	8✔
348		8✔
349	// Add the remote public key to peerScores.	8✔
350	a.banScoreMtx.Lock()	8✔
351	defer a.banScoreMtx.Unlock()	8✔
352		8✔
353	peerMapKey := string(remotePub.SerializeCompressed())	8✔
354		8✔
355	a.peerScores[peerMapKey] = peerSlotStatus{state: access}	8✔
356		8✔
357	// Increment numRestricted.	8✔
358	if access == peerStatusRestricted {	13✔
359	a.numRestricted++	5✔
360	}	5✔
361	}
362
363	// removePeerAccess removes the peer's access from the maps. This should be
364	// called when the peer has been disconnected.
365	func (a accessMan) removePeerAccess(remotePub btcec.PublicKey) {	3✔
366	a.banScoreMtx.Lock()	3✔
367	defer a.banScoreMtx.Unlock()	3✔
368		3✔
369	peerMapKey := string(remotePub.SerializeCompressed())	3✔
370		3✔
371	status, found := a.peerScores[peerMapKey]	3✔
372	if !found {	3✔
373	return	×
374	}	×
375
376	if status.state == peerStatusRestricted {	6✔
377	// If the status is restricted, then we decrement from	3✔
378	// numRestrictedSlots.	3✔
379	a.numRestricted--	3✔
380	}	3✔
381
382	delete(a.peerScores, peerMapKey)	3✔
383	}

lightningnetwork / lnd / 14193549836

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