graph/db: thread context through FetchChannelEdgesByID

diff --git a/discovery/chan_series.go b/discovery/chan_series.go
index a1f0778..5fff3ca 100644
--- a/discovery/chan_series.go
+++ b/discovery/chan_series.go
@@ -354,7 +354,7 @@ func (c *ChanSeries) FetchChanUpdates(chain chainhash.Hash,
 	shortChanID lnwire.ShortChannelID) ([]*lnwire.ChannelUpdate1, error) {
 
 	chanInfo, e1, e2, err := c.graph.FetchChannelEdgesByID(
-		shortChanID.ToUint64(),
+		context.TODO(), shortChanID.ToUint64(),
 	)
 	if err != nil {
 		return nil, err
diff --git a/graph/builder.go b/graph/builder.go
index 497b263..96b79fc 100644
--- a/graph/builder.go
+++ b/graph/builder.go
@@ -1259,7 +1259,9 @@ func (b *Builder) GetChannelByID(chanID lnwire.ShortChannelID) (
 	*models.ChannelEdgePolicy,
 	*models.ChannelEdgePolicy, error) {
 
-	return b.cfg.Graph.FetchChannelEdgesByID(chanID.ToUint64())
+	return b.cfg.Graph.FetchChannelEdgesByID(
+		context.TODO(), chanID.ToUint64(),
+	)
 }
 
 // FetchNode attempts to look up a target node by its identity public
diff --git a/graph/db/graph.go b/graph/db/graph.go
index e199ce0..a192ae3 100644
--- a/graph/db/graph.go
+++ b/graph/db/graph.go
@@ -739,12 +739,13 @@ func (c *ChannelGraph) FetchChannelEdgesByOutpoint(op *wire.OutPoint) (
 }
 
 // FetchChannelEdgesByID attempts to lookup directed edges by channel ID.
-func (c *ChannelGraph) FetchChannelEdgesByID(chanID uint64) (
+func (c *ChannelGraph) FetchChannelEdgesByID(ctx context.Context,
+	chanID uint64) (
 	*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
 	*models.ChannelEdgePolicy, error) {
 
 	return c.db.FetchChannelEdgesByID(
-		lnwire.GossipVersion1, chanID,
+		ctx, lnwire.GossipVersion1, chanID,
 	)
 }
 
@@ -812,11 +813,12 @@ func (c *VersionedGraph) FetchNode(ctx context.Context,
 }
 
 // FetchChannelEdgesByID attempts to lookup directed edges by channel ID.
-func (c *VersionedGraph) FetchChannelEdgesByID(chanID uint64) (
+func (c *VersionedGraph) FetchChannelEdgesByID(ctx context.Context,
+	chanID uint64) (
 	*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
 	*models.ChannelEdgePolicy, error) {
 
-	return c.db.FetchChannelEdgesByID(c.v, chanID)
+	return c.db.FetchChannelEdgesByID(ctx, c.v, chanID)
 }
 
 // FetchChannelEdgesByOutpoint attempts to lookup directed edges by funding
diff --git a/graph/db/graph_test.go b/graph/db/graph_test.go
index 8572808..b201e96 100644
--- a/graph/db/graph_test.go
+++ b/graph/db/graph_test.go
@@ -643,7 +643,7 @@ func testEdgeInsertionDeletion(t *testing.T, v lnwire.GossipVersion) {
 
 	// Ensure that both policies are returned as unknown (nil) and that
 	// the edge info round-trips correctly.
-	dbEdge, e1, e2, err := graph.FetchChannelEdgesByID(chanID)
+	dbEdge, e1, e2, err := graph.FetchChannelEdgesByID(ctx, chanID)
 	require.NoError(t, err)
 	require.Nil(t, e1)
 	require.Nil(t, e2)
@@ -712,7 +712,7 @@ func testEdgeInsertionDeletion(t *testing.T, v lnwire.GossipVersion) {
 	// Assert that if the edge is a zombie, then FetchChannelEdgesByID
 	// still returns a populated models.ChannelEdgeInfo as its comment
 	// description promises.
-	edge, _, _, err := graph.FetchChannelEdgesByID(chanID)
+	edge, _, _, err := graph.FetchChannelEdgesByID(ctx, chanID)
 	require.ErrorIs(t, err, ErrZombieEdge)
 	require.NotNil(t, edge)
 
@@ -1195,7 +1195,9 @@ func testEdgeInfoUpdates(t *testing.T, v lnwire.GossipVersion) {
 
 	// With the edges inserted, perform some queries to ensure that they've
 	// been inserted properly.
-	dbEdgeInfo, dbEdge1, dbEdge2, err := graph.FetchChannelEdgesByID(chanID)
+	dbEdgeInfo, dbEdge1, dbEdge2, err := graph.FetchChannelEdgesByID(
+		ctx, chanID,
+	)
 	require.NoError(t, err, "unable to fetch channel by ID")
 	compareEdgePolicies(t, dbEdge1, edge1)
 	compareEdgePolicies(t, dbEdge2, edge2)
@@ -1578,7 +1580,9 @@ func testAddEdgeProof(t *testing.T, v lnwire.GossipVersion) {
 	require.NoError(t, graph.AddChannelEdge(ctx, edge1))
 
 	// Fetch the edge and assert that the proof is nil.
-	dbEdge, _, _, err := graph.FetchChannelEdgesByID(edge1.ChannelID)
+	dbEdge, _, _, err := graph.FetchChannelEdgesByID(
+		ctx, edge1.ChannelID,
+	)
 	require.NoError(t, err)
 	require.Nil(t, dbEdge.AuthProof)
 
@@ -1608,7 +1612,9 @@ func testAddEdgeProof(t *testing.T, v lnwire.GossipVersion) {
 	require.NoError(t, graph.AddEdgeProof(scid1, proof))
 
 	// Fetch the edge again and assert that the proof is now set.
-	dbEdge, _, _, err = graph.FetchChannelEdgesByID(edge1.ChannelID)
+	dbEdge, _, _, err = graph.FetchChannelEdgesByID(
+		ctx, edge1.ChannelID,
+	)
 	require.NoError(t, err)
 	require.NotNil(t, dbEdge.AuthProof)
 
@@ -1618,7 +1624,9 @@ func testAddEdgeProof(t *testing.T, v lnwire.GossipVersion) {
 	require.NoError(t, graph.AddChannelEdge(ctx, edge2))
 
 	// Fetch the edge and assert that the proof is set.
-	dbEdge2, _, _, err := graph.FetchChannelEdgesByID(edge2.ChannelID)
+	dbEdge2, _, _, err := graph.FetchChannelEdgesByID(
+		ctx, edge2.ChannelID,
+	)
 	require.NoError(t, err)
 	require.NotNil(t, dbEdge2.AuthProof)
 }
@@ -4486,7 +4494,9 @@ func TestEdgePolicyMissingMaxHTLC(t *testing.T) {
 	// we added is invalid according to the new format, it should be as we
 	// are not aware of the policy (indicated by the policy returned being
 	// nil)
-	dbEdgeInfo, dbEdge1, dbEdge2, err := graph.FetchChannelEdgesByID(chanID)
+	dbEdgeInfo, dbEdge1, dbEdge2, err := graph.FetchChannelEdgesByID(
+		ctx, chanID,
+	)
 	require.NoError(t, err, "unable to fetch channel by ID")
 
 	// The first edge should have a nil-policy returned
@@ -4498,7 +4508,9 @@ func TestEdgePolicyMissingMaxHTLC(t *testing.T) {
 	// policies then become fully populated.
 	require.NoError(t, graph.UpdateEdgePolicy(ctx, edge1))
 
-	dbEdgeInfo, dbEdge1, dbEdge2, err = graph.FetchChannelEdgesByID(chanID)
+	dbEdgeInfo, dbEdge1, dbEdge2, err = graph.FetchChannelEdgesByID(
+		ctx, chanID,
+	)
 	require.NoError(t, err, "unable to fetch channel by ID")
 	compareEdgePolicies(t, dbEdge1, edge1)
 	compareEdgePolicies(t, dbEdge2, edge2)
diff --git a/graph/db/interfaces.go b/graph/db/interfaces.go
index a698183..550c78a 100644
--- a/graph/db/interfaces.go
+++ b/graph/db/interfaces.go
@@ -311,7 +311,8 @@ type Store interface { //nolint:interfacebloat
 	// zombie within the database. In this case, the ChannelEdgePolicy's
 	// will be nil, and the ChannelEdgeInfo will only include the public
 	// keys of each node.
-	FetchChannelEdgesByID(v lnwire.GossipVersion, chanID uint64) (
+	FetchChannelEdgesByID(ctx context.Context, v lnwire.GossipVersion,
+		chanID uint64) (
 		*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
 		*models.ChannelEdgePolicy, error)
 
diff --git a/graph/db/kv_store.go b/graph/db/kv_store.go
index 09b180b..f77484a 100644
--- a/graph/db/kv_store.go
+++ b/graph/db/kv_store.go
@@ -3989,8 +3989,9 @@ func (c *KVStore) FetchChannelEdgesByOutpoint(v lnwire.GossipVersion,
 // ErrZombieEdge an be returned if the edge is currently marked as a zombie
 // within the database. In this case, the ChannelEdgePolicy's will be nil, and
 // the ChannelEdgeInfo will only include the public keys of each node.
-func (c *KVStore) FetchChannelEdgesByID(v lnwire.GossipVersion,
-	chanID uint64) (*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
+func (c *KVStore) FetchChannelEdgesByID(_ context.Context,
+	v lnwire.GossipVersion, chanID uint64) (
+	*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
 	*models.ChannelEdgePolicy, error) {
 
 	if v != lnwire.GossipVersion1 {
diff --git a/graph/db/notifications.go b/graph/db/notifications.go
index 54a748c..6676cbe 100644
--- a/graph/db/notifications.go
+++ b/graph/db/notifications.go
@@ -1,6 +1,7 @@
 package graphdb
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"image/color"
@@ -412,7 +413,9 @@ func (c *ChannelGraph) addToTopologyChange(update *TopologyChange,
 		// We'll need to fetch the edge's information from the database
 		// in order to get the information concerning which nodes are
 		// being connected.
-		edgeInfo, _, _, err := c.FetchChannelEdgesByID(m.ChannelID)
+		edgeInfo, _, _, err := c.FetchChannelEdgesByID(
+			context.TODO(), m.ChannelID,
+		)
 		if err != nil {
 			return fmt.Errorf("unable fetch channel edge: %w", err)
 		}
diff --git a/graph/db/sql_store.go b/graph/db/sql_store.go
index a534ecc..9085e06 100644
--- a/graph/db/sql_store.go
+++ b/graph/db/sql_store.go
@@ -2050,12 +2050,12 @@ func (s *SQLStore) DeleteChannelEdges(ctx context.Context,
 // the ChannelEdgeInfo will only include the public keys of each node.
 //
 // NOTE: part of the Store interface.
-func (s *SQLStore) FetchChannelEdgesByID(v lnwire.GossipVersion,
-	chanID uint64) (*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
+func (s *SQLStore) FetchChannelEdgesByID(ctx context.Context,
+	v lnwire.GossipVersion, chanID uint64) (
+	*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
 	*models.ChannelEdgePolicy, error) {
 
 	var (
-		ctx              = context.TODO()
 		edge             *models.ChannelEdgeInfo
 		policy1, policy2 *models.ChannelEdgePolicy
 		chanIDB          = channelIDToBytes(chanID)
diff --git a/lnrpc/invoicesrpc/addinvoice.go b/lnrpc/invoicesrpc/addinvoice.go
index aba5da4..7d8ece0 100644
--- a/lnrpc/invoicesrpc/addinvoice.go
+++ b/lnrpc/invoicesrpc/addinvoice.go
@@ -522,8 +522,16 @@ func AddInvoice(ctx context.Context, cfg *AddInvoiceConfig,
 		//nolint:ll
 		paths, err := blindedpath.BuildBlindedPaymentPaths(
 			&blindedpath.BuildBlindedPathCfg{
-				FindRoutes:              cfg.QueryBlindedRoutes,
-				FetchChannelEdgesByID:   cfg.Graph.FetchChannelEdgesByID,
+				FindRoutes: cfg.QueryBlindedRoutes,
+				FetchChannelEdgesByID: func(chanID uint64) (
+					*models.ChannelEdgeInfo,
+					*models.ChannelEdgePolicy,
+					*models.ChannelEdgePolicy, error) {
+
+					return cfg.Graph.FetchChannelEdgesByID(
+						context.TODO(), chanID,
+					)
+				},
 				FetchOurOpenChannels:    cfg.ChanDB.FetchAllOpenChannels,
 				PathID:                  paymentAddr[:],
 				ValueMsat:               invoice.Value,
@@ -790,9 +798,16 @@ func newSelectHopHintsCfg(invoicesCfg *AddInvoiceConfig,
 		FetchAllChannels:      invoicesCfg.ChanDB.FetchAllChannels,
 		IsChannelActive:       invoicesCfg.IsChannelActive,
 		IsPublicNode:          invoicesCfg.Graph.IsPublicNode,
-		FetchChannelEdgesByID: invoicesCfg.Graph.FetchChannelEdgesByID,
-		GetAlias:              invoicesCfg.GetAlias,
-		MaxHopHints:           maxHopHints,
+		FetchChannelEdgesByID: func(chanID uint64) (
+			*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
+			*models.ChannelEdgePolicy, error) {
+
+			return invoicesCfg.Graph.FetchChannelEdgesByID(
+				context.TODO(), chanID,
+			)
+		},
+		GetAlias:    invoicesCfg.GetAlias,
+		MaxHopHints: maxHopHints,
 	}
 }
 
diff --git a/lnrpc/invoicesrpc/interfaces.go b/lnrpc/invoicesrpc/interfaces.go
index df47d2f..d350af6 100644
--- a/lnrpc/invoicesrpc/interfaces.go
+++ b/lnrpc/invoicesrpc/interfaces.go
@@ -1,6 +1,8 @@
 package invoicesrpc
 
 import (
+	"context"
+
 	"github.com/lightningnetwork/lnd/graph/db/models"
 )
 
@@ -9,8 +11,9 @@ type GraphSource interface {
 	// FetchChannelEdgesByID attempts to look up the two directed edges for
 	// the channel identified by the channel ID. If the channel can't be
 	// found, then graphdb.ErrEdgeNotFound is returned.
-	FetchChannelEdgesByID(chanID uint64) (*models.ChannelEdgeInfo,
-		*models.ChannelEdgePolicy, *models.ChannelEdgePolicy, error)
+	FetchChannelEdgesByID(ctx context.Context, chanID uint64) (
+		*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
+		*models.ChannelEdgePolicy, error)
 
 	// IsPublicNode is a helper method that determines whether the node with
 	// the given public key is seen as a public node in the graph from the
diff --git a/routing/pathfind_test.go b/routing/pathfind_test.go
index 01f5d98..3dc1ddf 100644
--- a/routing/pathfind_test.go
+++ b/routing/pathfind_test.go
@@ -2199,7 +2199,9 @@ func runRouteFailMaxHTLC(t *testing.T, useCache bool) {
 	// Next, update the middle edge policy to only allow payments up to 100k
 	// msat.
 	graph := ctx.testGraphInstance.graph
-	_, midEdge, _, err := graph.FetchChannelEdgesByID(firstToSecondID)
+	_, midEdge, _, err := graph.FetchChannelEdgesByID(
+		t.Context(), firstToSecondID,
+	)
 	require.NoError(t, err, "unable to fetch channel edges by ID")
 	midEdge.MessageFlags = 1
 	midEdge.MaxHTLC = payAmt - 1
@@ -2243,7 +2245,9 @@ func runRouteFailDisabledEdge(t *testing.T, useCache bool) {
 	// path finding, as we don't consider the disable flag for local
 	// channels (and roasbeef is the source).
 	roasToPham := uint64(999991)
-	_, e1, e2, err := graph.graph.FetchChannelEdgesByID(roasToPham)
+	_, e1, e2, err := graph.graph.FetchChannelEdgesByID(
+		t.Context(), roasToPham,
+	)
 	require.NoError(t, err, "unable to fetch edge")
 	e1.ChannelFlags |= lnwire.ChanUpdateDisabled
 	e1.LastUpdate = e1.LastUpdate.Add(time.Second)
@@ -2266,7 +2270,9 @@ func runRouteFailDisabledEdge(t *testing.T, useCache bool) {
 	// Now, we'll modify the edge from phamnuwen -> sophon, to read that
 	// it's disabled.
 	phamToSophon := uint64(99999)
-	_, e, _, err := graph.graph.FetchChannelEdgesByID(phamToSophon)
+	_, e, _, err := graph.graph.FetchChannelEdgesByID(
+		t.Context(), phamToSophon,
+	)
 	require.NoError(t, err, "unable to fetch edge")
 	e.ChannelFlags |= lnwire.ChanUpdateDisabled
 	e.LastUpdate = e.LastUpdate.Add(time.Second)
@@ -2349,7 +2355,9 @@ func runPathSourceEdgesBandwidth(t *testing.T, useCache bool) {
 	// Finally, set the roasbeef->songoku bandwidth, but also set its
 	// disable flag.
 	bandwidths.hints[roasToSongoku] = 2 * payAmt
-	_, e1, e2, err := graph.graph.FetchChannelEdgesByID(roasToSongoku)
+	_, e1, e2, err := graph.graph.FetchChannelEdgesByID(
+		t.Context(), roasToSongoku,
+	)
 	require.NoError(t, err, "unable to fetch edge")
 	e1.ChannelFlags |= lnwire.ChanUpdateDisabled
 	e1.LastUpdate = e1.LastUpdate.Add(time.Second)
diff --git a/routing/router_test.go b/routing/router_test.go
index 115c02c..d3dea61 100644
--- a/routing/router_test.go
+++ b/routing/router_test.go
@@ -454,7 +454,7 @@ func TestChannelUpdateValidation(t *testing.T) {
 
 	// Assert that the initially configured fee is retrieved correctly.
 	_, e1, e2, err := ctx.graph.FetchChannelEdgesByID(
-		lnwire.NewShortChanIDFromInt(1).ToUint64(),
+		t.Context(), lnwire.NewShortChanIDFromInt(1).ToUint64(),
 	)
 	require.NoError(t, err, "cannot retrieve channel")
 
@@ -526,7 +526,7 @@ func TestChannelUpdateValidation(t *testing.T) {
 	require.Error(t, err, "expected route to fail with channel update")
 
 	_, e1, e2, err = ctx.graph.FetchChannelEdgesByID(
-		lnwire.NewShortChanIDFromInt(1).ToUint64(),
+		t.Context(), lnwire.NewShortChanIDFromInt(1).ToUint64(),
 	)
 	require.NoError(t, err, "cannot retrieve channel")
 
@@ -548,7 +548,7 @@ func TestChannelUpdateValidation(t *testing.T) {
 	// This time a valid signature was supplied and the policy change should
 	// have been applied to the graph.
 	_, e1, e2, err = ctx.graph.FetchChannelEdgesByID(
-		lnwire.NewShortChanIDFromInt(1).ToUint64(),
+		t.Context(), lnwire.NewShortChanIDFromInt(1).ToUint64(),
 	)
 	require.NoError(t, err, "cannot retrieve channel")
 
@@ -589,7 +589,7 @@ func TestSendPaymentErrorRepeatedFeeInsufficient(t *testing.T) {
 	// to sophon. We'll obtain this as we'll need to to generate the
 	// FeeInsufficient error that we'll send back.
 	_, _, edgeUpdateToFail, err := ctx.graph.FetchChannelEdgesByID(
-		songokuSophonChanID,
+		t.Context(), songokuSophonChanID,
 	)
 	require.NoError(t, err, "unable to fetch chan id")
 
@@ -936,7 +936,9 @@ func TestSendPaymentErrorNonFinalTimeLockErrors(t *testing.T) {
 	chanID := ctx.getChannelIDFromAlias(t, "roasbeef", "songoku")
 	roasbeefSongoku := lnwire.NewShortChanIDFromInt(chanID)
 
-	_, _, edgeUpdateToFail, err := ctx.graph.FetchChannelEdgesByID(chanID)
+	_, _, edgeUpdateToFail, err := ctx.graph.FetchChannelEdgesByID(
+		t.Context(), chanID,
+	)
 	require.NoError(t, err, "unable to fetch chan id")
 
 	errChanUpdate := lnwire.ChannelUpdate1{
diff --git a/rpcserver.go b/rpcserver.go
index bfe537a..4a9c8e7 100644
--- a/rpcserver.go
+++ b/rpcserver.go
@@ -716,7 +716,9 @@ func (r *rpcServer) addDeps(ctx context.Context, s *server,
 		FetchChannelCapacity: func(chanID uint64) (btcutil.Amount,
 			error) {
 
-			info, _, _, err := graph.FetchChannelEdgesByID(chanID)
+			info, _, _, err := graph.FetchChannelEdgesByID(
+				ctx, chanID,
+			)
 			if err != nil {
 				return 0, err
 			}
@@ -734,7 +736,7 @@ func (r *rpcServer) addDeps(ctx context.Context, s *server,
 			route.Vertex, error) {
 
 			info, _, _, err := graph.FetchChannelEdgesByID(
-				chanID,
+				ctx, chanID,
 			)
 			if err != nil {
 				return route.Vertex{}, route.Vertex{},
@@ -7106,7 +7108,7 @@ func (r *rpcServer) GetNodeMetrics(ctx context.Context,
 // uniquely identify the location of transaction's funding output within the
 // blockchain. The former is an 8-byte integer, while the latter is a string
 // formatted as funding_txid:output_index.
-func (r *rpcServer) GetChanInfo(_ context.Context,
+func (r *rpcServer) GetChanInfo(ctx context.Context,
 	in *lnrpc.ChanInfoRequest) (*lnrpc.ChannelEdge, error) {
 
 	graph := r.server.graphDB
@@ -7120,7 +7122,7 @@ func (r *rpcServer) GetChanInfo(_ context.Context,
 	switch {
 	case in.ChanId != 0:
 		edgeInfo, edge1, edge2, err = graph.FetchChannelEdgesByID(
-			in.ChanId,
+			ctx, in.ChanId,
 		)
 
 	case in.ChanPoint != "":
diff --git a/server.go b/server.go
index 248a69c..6c68971 100644
--- a/server.go
+++ b/server.go
@@ -1397,7 +1397,7 @@ func newServer(ctx context.Context, cfg *Config, listenAddrs []net.Addr,
 		*models.ChannelEdgePolicy, error) {
 
 		info, e1, e2, err := s.graphDB.FetchChannelEdgesByID(
-			scid.ToUint64(),
+			context.TODO(), scid.ToUint64(),
 		)
 		if errors.Is(err, graphdb.ErrEdgeNotFound) {
 			// This is unlikely but there is a slim chance of this