12199391122

Committed 06 Dec 2024 01:10PM UTC coverage: 49.807% (-9.1%) from 58.933%

Build # 12199391122

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github

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web-flow

Commit Message

Merge pull request #9337 from Guayaba221/patch-1

chore: fix typo in ruby.md

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89.39

/graph/validation_barrier.go

package graph

import (
        "fmt"
        "sync"

        "github.com/lightningnetwork/lnd/graph/db/models"
        "github.com/lightningnetwork/lnd/lnwire"
        "github.com/lightningnetwork/lnd/routing/route"
)

// validationSignals contains two signals which allows the ValidationBarrier to
// communicate back to the caller whether a dependent should be processed or not
// based on whether its parent was successfully validated. Only one of these
// signals is to be used at a time.
type validationSignals struct {
        // allow is the signal used to allow a dependent to be processed.
        allow chan struct{}

        // deny is the signal used to prevent a dependent from being processed.
        deny chan struct{}
}

// ValidationBarrier is a barrier used to ensure proper validation order while
// concurrently validating new announcements for channel edges, and the
// attributes of channel edges.  It uses this set of maps (protected by this
// mutex) to track validation dependencies. For a given channel our
// dependencies look like this: chanAnn <- chanUp <- nodeAnn. That is we must
// validate the item on the left of the arrow before that on the right.
type ValidationBarrier struct {
        // validationSemaphore is a channel of structs which is used as a
        // semaphore. Initially we'll fill this with a buffered channel of the
        // size of the number of active requests. Each new job will consume
        // from this channel, then restore the value upon completion.
        validationSemaphore chan struct{}

        // chanAnnFinSignal is map that keep track of all the pending
        // ChannelAnnouncement like validation job going on. Once the job has
        // been completed, the channel will be closed unblocking any
        // dependants.
        chanAnnFinSignal map[lnwire.ShortChannelID]*validationSignals

        // chanEdgeDependencies tracks any channel edge updates which should
        // wait until the completion of the ChannelAnnouncement before
        // proceeding. This is a dependency, as we can't validate the update
        // before we validate the announcement which creates the channel
        // itself.
        chanEdgeDependencies map[lnwire.ShortChannelID]*validationSignals

        // nodeAnnDependencies tracks any pending NodeAnnouncement validation
        // jobs which should wait until the completion of the
        // ChannelAnnouncement before proceeding.
        nodeAnnDependencies map[route.Vertex]*validationSignals

        quit chan struct{}
        sync.Mutex
}

// NewValidationBarrier creates a new instance of a validation barrier given
// the total number of active requests, and a quit channel which will be used
// to know when to kill pending, but unfilled jobs.
func NewValidationBarrier(numActiveReqs int,
        quitChan chan struct{}) *ValidationBarrier {

        v := &ValidationBarrier{
                chanAnnFinSignal:     make(map[lnwire.ShortChannelID]*validationSignals),
                chanEdgeDependencies: make(map[lnwire.ShortChannelID]*validationSignals),
                nodeAnnDependencies:  make(map[route.Vertex]*validationSignals),
                quit:                 quitChan,
        }

        // We'll first initialize a set of semaphores to limit our concurrency
        // when validating incoming requests in parallel.
        v.validationSemaphore = make(chan struct{}, numActiveReqs)
        for i := 0; i < numActiveReqs; i++ {
                v.validationSemaphore <- struct{}{}
        }

        return v
}

// InitJobDependencies will wait for a new job slot to become open, and then
// sets up any dependent signals/trigger for the new job
func (v *ValidationBarrier) InitJobDependencies(job interface{}) {
        // We'll wait for either a new slot to become open, or for the quit
        // channel to be closed.
        select {
        case <-v.validationSemaphore:
        case <-v.quit:
        }

        v.Lock()
        defer v.Unlock()

        // Once a slot is open, we'll examine the message of the job, to see if
        // there need to be any dependent barriers set up.
        switch msg := job.(type) {

        // If this is a channel announcement, then we'll need to set up den
        // tenancies, as we'll need to verify this before we verify any
        // ChannelUpdates for the same channel, or NodeAnnouncements of nodes
        // that are involved in this channel. This goes for both the wire
        // type,s and also the types that we use within the database.
        case *lnwire.ChannelAnnouncement1:

                // We ensure that we only create a new announcement signal iff,
                // one doesn't already exist, as there may be duplicate
                // announcements.  We'll close this signal once the
                // ChannelAnnouncement has been validated. This will result in
                // all the dependent jobs being unlocked so they can finish
                // execution themselves.
                if _, ok := v.chanAnnFinSignal[msg.ShortChannelID]; !ok {
                        // We'll create the channel that we close after we
                        // validate this announcement. All dependants will
                        // point to this same channel, so they'll be unblocked
                        // at the same time.
                        signals := &validationSignals{
                                allow: make(chan struct{}),
                                deny:  make(chan struct{}),
                        }

                        v.chanAnnFinSignal[msg.ShortChannelID] = signals
                        v.chanEdgeDependencies[msg.ShortChannelID] = signals

                        v.nodeAnnDependencies[route.Vertex(msg.NodeID1)] = signals
                        v.nodeAnnDependencies[route.Vertex(msg.NodeID2)] = signals
                }
        case *models.ChannelEdgeInfo:

                shortID := lnwire.NewShortChanIDFromInt(msg.ChannelID)
                if _, ok := v.chanAnnFinSignal[shortID]; !ok {
                        signals := &validationSignals{
                                allow: make(chan struct{}),
                                deny:  make(chan struct{}),
                        }

                        v.chanAnnFinSignal[shortID] = signals
                        v.chanEdgeDependencies[shortID] = signals

                        v.nodeAnnDependencies[route.Vertex(msg.NodeKey1Bytes)] = signals
                        v.nodeAnnDependencies[route.Vertex(msg.NodeKey2Bytes)] = signals
                }

        // These other types don't have any dependants, so no further
        // initialization needs to be done beyond just occupying a job slot.
        case *models.ChannelEdgePolicy:
                return
        case *lnwire.ChannelUpdate1:
                return
        case *lnwire.NodeAnnouncement:
                // TODO(roasbeef): node ann needs to wait on existing channel updates
                return
        case *models.LightningNode:
                return
        case *lnwire.AnnounceSignatures1:
                // TODO(roasbeef): need to wait on chan ann?
                return
        }
}

// CompleteJob returns a free slot to the set of available job slots. This
// should be called once a job has been fully completed. Otherwise, slots may
// not be returned to the internal scheduling, causing a deadlock when a new
// overflow job is attempted.
func (v *ValidationBarrier) CompleteJob() {
        select {
        case v.validationSemaphore <- struct{}{}:
        case <-v.quit:
        }
}

// WaitForDependants will block until any jobs that this job dependants on have
// finished executing. This allows us a graceful way to schedule goroutines
// based on any pending uncompleted dependent jobs. If this job doesn't have an
// active dependent, then this function will return immediately.
func (v *ValidationBarrier) WaitForDependants(job interface{}) error {

        var (
                signals *validationSignals
                ok      bool
                jobDesc string
        )

        // Acquire a lock to read ValidationBarrier.
        v.Lock()

        switch msg := job.(type) {
        // Any ChannelUpdate or NodeAnnouncement jobs will need to wait on the
        // completion of any active ChannelAnnouncement jobs related to them.
        case *models.ChannelEdgePolicy:
                shortID := lnwire.NewShortChanIDFromInt(msg.ChannelID)
                signals, ok = v.chanEdgeDependencies[shortID]

                jobDesc = fmt.Sprintf("job=lnwire.ChannelEdgePolicy, scid=%v",
                        msg.ChannelID)

        case *models.LightningNode:
                vertex := route.Vertex(msg.PubKeyBytes)
                signals, ok = v.nodeAnnDependencies[vertex]

                jobDesc = fmt.Sprintf("job=channeldb.LightningNode, pub=%s",
                        vertex)

        case *lnwire.ChannelUpdate1:
                signals, ok = v.chanEdgeDependencies[msg.ShortChannelID]

                jobDesc = fmt.Sprintf("job=lnwire.ChannelUpdate, scid=%v",
                        msg.ShortChannelID.ToUint64())

        case *lnwire.NodeAnnouncement:
                vertex := route.Vertex(msg.NodeID)
                signals, ok = v.nodeAnnDependencies[vertex]
                jobDesc = fmt.Sprintf("job=lnwire.NodeAnnouncement, pub=%s",
                        vertex)

        // Other types of jobs can be executed immediately, so we'll just
        // return directly.
        case *lnwire.AnnounceSignatures1:
                // TODO(roasbeef): need to wait on chan ann?
        case *models.ChannelEdgeInfo:
        case *lnwire.ChannelAnnouncement1:
        }

        // Release the lock once the above read is finished.
        v.Unlock()

        // If it's not ok, it means either the job is not a dependent type, or
        // it doesn't have a dependency signal. Either way, we can return
        // early.
        if !ok {
                return nil
        }

        log.Debugf("Waiting for dependent on %s", jobDesc)

        // If we do have an active job, then we'll wait until either the signal
        // is closed, or the set of jobs exits.
        select {
        case <-v.quit:
                return NewErrf(ErrVBarrierShuttingDown,
                        "validation barrier shutting down")

        case <-signals.deny:
                log.Debugf("Signal deny for %s", jobDesc)
                return NewErrf(ErrParentValidationFailed,
                        "parent validation failed")

        case <-signals.allow:
                log.Tracef("Signal allow for %s", jobDesc)
                return nil
        }
}

// SignalDependants will allow/deny any jobs that are dependent on this job that
// they can continue execution. If the job doesn't have any dependants, then
// this function sill exit immediately.
func (v *ValidationBarrier) SignalDependants(job interface{}, allow bool) {
        v.Lock()
        defer v.Unlock()

        switch msg := job.(type) {

        // If we've just finished executing a ChannelAnnouncement, then we'll
        // close out the signal, and remove the signal from the map of active
        // ones. This will allow/deny any dependent jobs to continue execution.
        case *models.ChannelEdgeInfo:
                shortID := lnwire.NewShortChanIDFromInt(msg.ChannelID)
                finSignals, ok := v.chanAnnFinSignal[shortID]
                if ok {
                        if allow {
                                close(finSignals.allow)
                        } else {
                                close(finSignals.deny)
                        }
                        delete(v.chanAnnFinSignal, shortID)
                }
        case *lnwire.ChannelAnnouncement1:
                finSignals, ok := v.chanAnnFinSignal[msg.ShortChannelID]
                if ok {
                        if allow {
                                close(finSignals.allow)
                        } else {
                                close(finSignals.deny)
                        }
                        delete(v.chanAnnFinSignal, msg.ShortChannelID)
                }

                delete(v.chanEdgeDependencies, msg.ShortChannelID)

        // For all other job types, we'll delete the tracking entries from the
        // map, as if we reach this point, then all dependants have already
        // finished executing and we can proceed.
        case *models.LightningNode:
                delete(v.nodeAnnDependencies, route.Vertex(msg.PubKeyBytes))
        case *lnwire.NodeAnnouncement:
                delete(v.nodeAnnDependencies, route.Vertex(msg.NodeID))
        case *lnwire.ChannelUpdate1:
                delete(v.chanEdgeDependencies, msg.ShortChannelID)
        case *models.ChannelEdgePolicy:
                shortID := lnwire.NewShortChanIDFromInt(msg.ChannelID)
                delete(v.chanEdgeDependencies, shortID)

        case *lnwire.AnnounceSignatures1:
                return
        }
}

1	package graph
2
3	import (
4	"fmt"
5	"sync"
6
7	"github.com/lightningnetwork/lnd/graph/db/models"
8	"github.com/lightningnetwork/lnd/lnwire"
9	"github.com/lightningnetwork/lnd/routing/route"
10	)
11
12	// validationSignals contains two signals which allows the ValidationBarrier to
13	// communicate back to the caller whether a dependent should be processed or not
14	// based on whether its parent was successfully validated. Only one of these
15	// signals is to be used at a time.
16	type validationSignals struct {
17	// allow is the signal used to allow a dependent to be processed.
18	allow chan struct{}
19
20	// deny is the signal used to prevent a dependent from being processed.
21	deny chan struct{}
22	}
23
24	// ValidationBarrier is a barrier used to ensure proper validation order while
25	// concurrently validating new announcements for channel edges, and the
26	// attributes of channel edges. It uses this set of maps (protected by this
27	// mutex) to track validation dependencies. For a given channel our
28	// dependencies look like this: chanAnn <- chanUp <- nodeAnn. That is we must
29	// validate the item on the left of the arrow before that on the right.
30	type ValidationBarrier struct {
31	// validationSemaphore is a channel of structs which is used as a
32	// semaphore. Initially we'll fill this with a buffered channel of the
33	// size of the number of active requests. Each new job will consume
34	// from this channel, then restore the value upon completion.
35	validationSemaphore chan struct{}
36
37	// chanAnnFinSignal is map that keep track of all the pending
38	// ChannelAnnouncement like validation job going on. Once the job has
39	// been completed, the channel will be closed unblocking any
40	// dependants.
41	chanAnnFinSignal map[lnwire.ShortChannelID]*validationSignals
42
43	// chanEdgeDependencies tracks any channel edge updates which should
44	// wait until the completion of the ChannelAnnouncement before
45	// proceeding. This is a dependency, as we can't validate the update
46	// before we validate the announcement which creates the channel
47	// itself.
48	chanEdgeDependencies map[lnwire.ShortChannelID]*validationSignals
49
50	// nodeAnnDependencies tracks any pending NodeAnnouncement validation
51	// jobs which should wait until the completion of the
52	// ChannelAnnouncement before proceeding.
53	nodeAnnDependencies map[route.Vertex]*validationSignals
54
55	quit chan struct{}
56	sync.Mutex
57	}
58
59	// NewValidationBarrier creates a new instance of a validation barrier given
60	// the total number of active requests, and a quit channel which will be used
61	// to know when to kill pending, but unfilled jobs.
62	func NewValidationBarrier(numActiveReqs int,
63	quitChan chan struct{}) *ValidationBarrier {	4✔
64		4✔
65	v := &ValidationBarrier{	4✔
66	chanAnnFinSignal: make(map[lnwire.ShortChannelID]*validationSignals),	4✔
67	chanEdgeDependencies: make(map[lnwire.ShortChannelID]*validationSignals),	4✔
68	nodeAnnDependencies: make(map[route.Vertex]*validationSignals),	4✔
69	quit: quitChan,	4✔
70	}	4✔
71		4✔
72	// We'll first initialize a set of semaphores to limit our concurrency	4✔
73	// when validating incoming requests in parallel.	4✔
74	v.validationSemaphore = make(chan struct{}, numActiveReqs)	4✔
75	for i := 0; i < numActiveReqs; i++ {	8✔
76	v.validationSemaphore <- struct{}{}	4✔
77	}	4✔
78
79	return v	4✔
80	}
81
82	// InitJobDependencies will wait for a new job slot to become open, and then
83	// sets up any dependent signals/trigger for the new job
84	func (v *ValidationBarrier) InitJobDependencies(job interface{}) {	4✔
85	// We'll wait for either a new slot to become open, or for the quit	4✔
86	// channel to be closed.	4✔
87	select {	4✔
88	case <-v.validationSemaphore:	4✔
89	case <-v.quit:	×
90	}
91
92	v.Lock()	4✔
93	defer v.Unlock()	4✔
94		4✔
95	// Once a slot is open, we'll examine the message of the job, to see if	4✔
96	// there need to be any dependent barriers set up.	4✔
97	switch msg := job.(type) {	4✔
98
99	// If this is a channel announcement, then we'll need to set up den
100	// tenancies, as we'll need to verify this before we verify any
101	// ChannelUpdates for the same channel, or NodeAnnouncements of nodes
102	// that are involved in this channel. This goes for both the wire
103	// type,s and also the types that we use within the database.
104	case *lnwire.ChannelAnnouncement1:	4✔
105		4✔
106	// We ensure that we only create a new announcement signal iff,	4✔
107	// one doesn't already exist, as there may be duplicate	4✔
108	// announcements. We'll close this signal once the	4✔
109	// ChannelAnnouncement has been validated. This will result in	4✔
110	// all the dependent jobs being unlocked so they can finish	4✔
111	// execution themselves.	4✔
112	if _, ok := v.chanAnnFinSignal[msg.ShortChannelID]; !ok {	8✔
113	// We'll create the channel that we close after we	4✔
114	// validate this announcement. All dependants will	4✔
115	// point to this same channel, so they'll be unblocked	4✔
116	// at the same time.	4✔
117	signals := &validationSignals{	4✔
118	allow: make(chan struct{}),	4✔
119	deny: make(chan struct{}),	4✔
120	}	4✔
121		4✔
122	v.chanAnnFinSignal[msg.ShortChannelID] = signals	4✔
123	v.chanEdgeDependencies[msg.ShortChannelID] = signals	4✔
124		4✔
125	v.nodeAnnDependencies[route.Vertex(msg.NodeID1)] = signals	4✔
126	v.nodeAnnDependencies[route.Vertex(msg.NodeID2)] = signals	4✔
127	}	4✔
128	case *models.ChannelEdgeInfo:	4✔
129		4✔
130	shortID := lnwire.NewShortChanIDFromInt(msg.ChannelID)	4✔
131	if _, ok := v.chanAnnFinSignal[shortID]; !ok {	8✔
132	signals := &validationSignals{	4✔
133	allow: make(chan struct{}),	4✔
134	deny: make(chan struct{}),	4✔
135	}	4✔
136		4✔
137	v.chanAnnFinSignal[shortID] = signals	4✔
138	v.chanEdgeDependencies[shortID] = signals	4✔
139		4✔
140	v.nodeAnnDependencies[route.Vertex(msg.NodeKey1Bytes)] = signals	4✔
141	v.nodeAnnDependencies[route.Vertex(msg.NodeKey2Bytes)] = signals	4✔
142	}	4✔
143
144	// These other types don't have any dependants, so no further
145	// initialization needs to be done beyond just occupying a job slot.
146	case *models.ChannelEdgePolicy:	4✔
147	return	4✔
148	case *lnwire.ChannelUpdate1:	4✔
149	return	4✔
150	case *lnwire.NodeAnnouncement:	4✔
151	// TODO(roasbeef): node ann needs to wait on existing channel updates	4✔
152	return	4✔
153	case *models.LightningNode:	4✔
154	return	4✔
155	case *lnwire.AnnounceSignatures1:	×
156	// TODO(roasbeef): need to wait on chan ann?	×
157	return	×
158	}
159	}
160
161	// CompleteJob returns a free slot to the set of available job slots. This
162	// should be called once a job has been fully completed. Otherwise, slots may
163	// not be returned to the internal scheduling, causing a deadlock when a new
164	// overflow job is attempted.
165	func (v *ValidationBarrier) CompleteJob() {	4✔
166	select {	4✔
167	case v.validationSemaphore <- struct{}{}:	4✔
168	case <-v.quit:	×
169	}
170	}
171
172	// WaitForDependants will block until any jobs that this job dependants on have
173	// finished executing. This allows us a graceful way to schedule goroutines
174	// based on any pending uncompleted dependent jobs. If this job doesn't have an
175	// active dependent, then this function will return immediately.
176	func (v *ValidationBarrier) WaitForDependants(job interface{}) error {	4✔
177		4✔
178	var (	4✔
179	signals *validationSignals	4✔
180	ok bool	4✔
181	jobDesc string	4✔
182	)	4✔
183		4✔
184	// Acquire a lock to read ValidationBarrier.	4✔
185	v.Lock()	4✔
186		4✔
187	switch msg := job.(type) {	4✔
188	// Any ChannelUpdate or NodeAnnouncement jobs will need to wait on the
189	// completion of any active ChannelAnnouncement jobs related to them.
190	case *models.ChannelEdgePolicy:	4✔
191	shortID := lnwire.NewShortChanIDFromInt(msg.ChannelID)	4✔
192	signals, ok = v.chanEdgeDependencies[shortID]	4✔
193		4✔
194	jobDesc = fmt.Sprintf("job=lnwire.ChannelEdgePolicy, scid=%v",	4✔
195	msg.ChannelID)	4✔
196
197	case *models.LightningNode:	4✔
198	vertex := route.Vertex(msg.PubKeyBytes)	4✔
199	signals, ok = v.nodeAnnDependencies[vertex]	4✔
200		4✔
201	jobDesc = fmt.Sprintf("job=channeldb.LightningNode, pub=%s",	4✔
202	vertex)	4✔
203
204	case *lnwire.ChannelUpdate1:	4✔
205	signals, ok = v.chanEdgeDependencies[msg.ShortChannelID]	4✔
206		4✔
207	jobDesc = fmt.Sprintf("job=lnwire.ChannelUpdate, scid=%v",	4✔
208	msg.ShortChannelID.ToUint64())	4✔
209
210	case *lnwire.NodeAnnouncement:	4✔
211	vertex := route.Vertex(msg.NodeID)	4✔
212	signals, ok = v.nodeAnnDependencies[vertex]	4✔
213	jobDesc = fmt.Sprintf("job=lnwire.NodeAnnouncement, pub=%s",	4✔
214	vertex)	4✔
215
216	// Other types of jobs can be executed immediately, so we'll just
217	// return directly.
218	case *lnwire.AnnounceSignatures1:	×
219	// TODO(roasbeef): need to wait on chan ann?
220	case *models.ChannelEdgeInfo:	4✔
221	case *lnwire.ChannelAnnouncement1:	4✔
222	}
223
224	// Release the lock once the above read is finished.
225	v.Unlock()	4✔
226		4✔
227	// If it's not ok, it means either the job is not a dependent type, or	4✔
228	// it doesn't have a dependency signal. Either way, we can return	4✔
229	// early.	4✔
230	if !ok {	8✔
231	return nil	4✔
232	}	4✔
233
234	log.Debugf("Waiting for dependent on %s", jobDesc)	4✔
235		4✔
236	// If we do have an active job, then we'll wait until either the signal	4✔
237	// is closed, or the set of jobs exits.	4✔
238	select {	4✔
239	case <-v.quit:	×
240	return NewErrf(ErrVBarrierShuttingDown,	×
241	"validation barrier shutting down")	×
242
243	case <-signals.deny:	×
244	log.Debugf("Signal deny for %s", jobDesc)	×
245	return NewErrf(ErrParentValidationFailed,	×
246	"parent validation failed")	×
247
248	case <-signals.allow:	4✔
249	log.Tracef("Signal allow for %s", jobDesc)	4✔
250	return nil	4✔
251	}
252	}
253
254	// SignalDependants will allow/deny any jobs that are dependent on this job that
255	// they can continue execution. If the job doesn't have any dependants, then
256	// this function sill exit immediately.
257	func (v *ValidationBarrier) SignalDependants(job interface{}, allow bool) {	4✔
258	v.Lock()	4✔
259	defer v.Unlock()	4✔
260		4✔
261	switch msg := job.(type) {	4✔
262
263	// If we've just finished executing a ChannelAnnouncement, then we'll
264	// close out the signal, and remove the signal from the map of active
265	// ones. This will allow/deny any dependent jobs to continue execution.
266	case *models.ChannelEdgeInfo:	4✔
267	shortID := lnwire.NewShortChanIDFromInt(msg.ChannelID)	4✔
268	finSignals, ok := v.chanAnnFinSignal[shortID]	4✔
269	if ok {	8✔
270	if allow {	8✔
271	close(finSignals.allow)	4✔
272	} else {	4✔
273	close(finSignals.deny)	×
274	}	×
275	delete(v.chanAnnFinSignal, shortID)	4✔
276	}
277	case *lnwire.ChannelAnnouncement1:	4✔
278	finSignals, ok := v.chanAnnFinSignal[msg.ShortChannelID]	4✔
279	if ok {	8✔
280	if allow {	8✔
281	close(finSignals.allow)	4✔
282	} else {	4✔
283	close(finSignals.deny)	×
284	}	×
285	delete(v.chanAnnFinSignal, msg.ShortChannelID)	4✔
286	}
287
288	delete(v.chanEdgeDependencies, msg.ShortChannelID)	4✔
289
290	// For all other job types, we'll delete the tracking entries from the
291	// map, as if we reach this point, then all dependants have already
292	// finished executing and we can proceed.
293	case *models.LightningNode:	4✔
294	delete(v.nodeAnnDependencies, route.Vertex(msg.PubKeyBytes))	4✔
295	case *lnwire.NodeAnnouncement:	4✔
296	delete(v.nodeAnnDependencies, route.Vertex(msg.NodeID))	4✔
297	case *lnwire.ChannelUpdate1:	4✔
298	delete(v.chanEdgeDependencies, msg.ShortChannelID)	4✔
299	case *models.ChannelEdgePolicy:	4✔
300	shortID := lnwire.NewShortChanIDFromInt(msg.ChannelID)	4✔
301	delete(v.chanEdgeDependencies, shortID)	4✔
302
303	case *lnwire.AnnounceSignatures1:	×
304	return	×
305	}
306	}

lightningnetwork / lnd / 12199391122

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