graph/db: thread context through to HighestChanID

discovery/chan_series.go

@@ -1,6 +1,7 @@
 package discovery
 
 import (
+	"context"
 	"time"
 
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
@@ -22,7 +23,8 @@ type ChannelGraphTimeSeries interface {
 	// height that's close to the current tip of the main chain as we
 	// know it.  We'll use this to start our QueryChannelRange dance with
 	// the remote node.
-	HighestChanID(chain chainhash.Hash) (*lnwire.ShortChannelID, error)
+	HighestChanID(ctx context.Context,
+		chain chainhash.Hash) (*lnwire.ShortChannelID, error)
 
 	// UpdatesInHorizon returns all known channel and node updates with an
 	// update timestamp between the start time and end time. We'll use this
@@ -87,8 +89,10 @@ func NewChanSeries(graph *graphdb.ChannelGraph) *ChanSeries {
 // this to start our QueryChannelRange dance with the remote node.
 //
 // NOTE: This is part of the ChannelGraphTimeSeries interface.
-func (c *ChanSeries) HighestChanID(chain chainhash.Hash) (*lnwire.ShortChannelID, error) {
+func (c *ChanSeries) HighestChanID(ctx context.Context,
-	chanID, err := c.graph.HighestChanID()
+	_ chainhash.Hash) (*lnwire.ShortChannelID, error) {
+
+	chanID, err := c.graph.HighestChanID(ctx)
 	if err != nil {
 		return nil, err
 	}

discovery/syncer.go

@@ -965,12 +965,14 @@ func (g *GossipSyncer) processChanRangeReply(_ context.Context,
 // party when we're kicking off the channel graph synchronization upon
 // connection. The historicalQuery boolean can be used to generate a query from
 // the genesis block of the chain.
-func (g *GossipSyncer) genChanRangeQuery(_ context.Context,
+func (g *GossipSyncer) genChanRangeQuery(ctx context.Context,
 	historicalQuery bool) (*lnwire.QueryChannelRange, error) {
 
 	// First, we'll query our channel graph time series for its highest
 	// known channel ID.
-	newestChan, err := g.cfg.channelSeries.HighestChanID(g.cfg.chainHash)
+	newestChan, err := g.cfg.channelSeries.HighestChanID(
+		ctx, g.cfg.chainHash,
+	)
 	if err != nil {
 		return nil, err
 	}

discovery/syncer_test.go

@@ -79,9 +79,12 @@ func newMockChannelGraphTimeSeries(
 	}
 }
 
-func (m *mockChannelGraphTimeSeries) HighestChanID(chain chainhash.Hash) (*lnwire.ShortChannelID, error) {
+func (m *mockChannelGraphTimeSeries) HighestChanID(_ context.Context,
+	_ chainhash.Hash) (*lnwire.ShortChannelID, error) {
+
 	return &m.highestID, nil
 }
+
 func (m *mockChannelGraphTimeSeries) UpdatesInHorizon(chain chainhash.Hash,
 	startTime time.Time, endTime time.Time) ([]lnwire.Message, error) {
 

graph/db/graph_test.go

@@ -1881,7 +1881,7 @@ func TestHighestChanID(t *testing.T) {
 
 	// If we don't yet have any channels in the database, then we should
 	// get a channel ID of zero if we ask for the highest channel ID.
-	bestID, err := graph.HighestChanID()
+	bestID, err := graph.HighestChanID(ctx)
 	require.NoError(t, err, "unable to get highest ID")
 	if bestID != 0 {
 		t.Fatalf("best ID w/ no chan should be zero, is instead: %v",
@@ -1907,7 +1907,7 @@ func TestHighestChanID(t *testing.T) {
 
 	// Now that the edges has been inserted, we'll query for the highest
 	// known channel ID in the database.
-	bestID, err = graph.HighestChanID()
+	bestID, err = graph.HighestChanID(ctx)
 	require.NoError(t, err, "unable to get highest ID")
 
 	if bestID != chanID2.ToUint64() {
@@ -1921,7 +1921,7 @@ func TestHighestChanID(t *testing.T) {
 	if err := graph.AddChannelEdge(ctx, &edge3); err != nil {
 		t.Fatalf("unable to create channel edge: %v", err)
 	}
-	bestID, err = graph.HighestChanID()
+	bestID, err = graph.HighestChanID(ctx)
 	require.NoError(t, err, "unable to get highest ID")
 
 	if bestID != chanID3.ToUint64() {

graph/db/interfaces.go

@@ -227,7 +227,7 @@ type V1Store interface { //nolint:interfacebloat
 	// graph. This represents the "newest" channel from the PoV of the
 	// chain. This method can be used by peers to quickly determine if
 	// they're graphs are in sync.
-	HighestChanID() (uint64, error)
+	HighestChanID(ctx context.Context) (uint64, error)
 
 	// ChanUpdatesInHorizon returns all the known channel edges which have
 	// at least one edge that has an update timestamp within the specified

graph/db/kv_store.go

@@ -1948,7 +1948,7 @@ func getChanID(tx kvdb.RTx, chanPoint *wire.OutPoint) (uint64, error) {
 // HighestChanID returns the "highest" known channel ID in the channel graph.
 // This represents the "newest" channel from the PoV of the chain. This method
 // can be used by peers to quickly determine if they're graphs are in sync.
-func (c *KVStore) HighestChanID() (uint64, error) {
+func (c *KVStore) HighestChanID(_ context.Context) (uint64, error) {
 	var cid uint64
 
 	err := kvdb.View(c.db, func(tx kvdb.RTx) error {

graph/db/sql_store.go

@@ -543,9 +543,7 @@ func (s *SQLStore) AddChannelEdge(ctx context.Context,
 // can be used by peers to quickly determine if their graphs are in sync.
 //
 // NOTE: This is part of the V1Store interface.
-func (s *SQLStore) HighestChanID() (uint64, error) {
+func (s *SQLStore) HighestChanID(ctx context.Context) (uint64, error) {
-	ctx := context.TODO()
-
 	var highestChanID uint64
 	err := s.db.ExecTx(ctx, sqldb.ReadTxOpt(), func(db SQLQueries) error {
 		chanID, err := db.HighestSCID(ctx, int16(ProtocolV1))