multi: thread context through FetchPayment

routing/control_tower.go

@@ -1,6 +1,7 @@
 package routing
 
 import (
+	"context"
 	"sync"
 
 	"github.com/lightningnetwork/lnd/lntypes"
@@ -52,7 +53,8 @@ type ControlTower interface {
 
 	// FetchPayment fetches the payment corresponding to the given payment
 	// hash.
-	FetchPayment(paymentHash lntypes.Hash) (paymentsdb.DBMPPayment, error)
+	FetchPayment(ctx context.Context,
+		paymentHash lntypes.Hash) (paymentsdb.DBMPPayment, error)
 
 	// FailPayment transitions a payment into the Failed state, and records
 	// the ultimate reason the payment failed. Note that this should only
@@ -164,6 +166,8 @@ func NewControlTower(db paymentsdb.DB) ControlTower {
 func (p *controlTower) InitPayment(paymentHash lntypes.Hash,
 	info *paymentsdb.PaymentCreationInfo) error {
 
+	ctx := context.TODO()
+
 	err := p.db.InitPayment(paymentHash, info)
 	if err != nil {
 		return err
@@ -174,7 +178,7 @@ func (p *controlTower) InitPayment(paymentHash lntypes.Hash,
 	p.paymentsMtx.Lock(paymentHash)
 	defer p.paymentsMtx.Unlock(paymentHash)
 
-	payment, err := p.db.FetchPayment(paymentHash)
+	payment, err := p.db.FetchPayment(ctx, paymentHash)
 	if err != nil {
 		return err
 	}
@@ -250,10 +254,11 @@ func (p *controlTower) FailAttempt(paymentHash lntypes.Hash,
 }
 
 // FetchPayment fetches the payment corresponding to the given payment hash.
-func (p *controlTower) FetchPayment(paymentHash lntypes.Hash) (
+func (p *controlTower) FetchPayment(ctx context.Context,
+	paymentHash lntypes.Hash) (
 	paymentsdb.DBMPPayment, error) {
 
-	return p.db.FetchPayment(paymentHash)
+	return p.db.FetchPayment(ctx, paymentHash)
 }
 
 // FailPayment transitions a payment into the Failed state, and records the
@@ -293,12 +298,14 @@ func (p *controlTower) FetchInFlightPayments() ([]*paymentsdb.MPPayment,
 func (p *controlTower) SubscribePayment(paymentHash lntypes.Hash) (
 	ControlTowerSubscriber, error) {
 
+	ctx := context.TODO()
+
 	// Take lock before querying the db to prevent missing or duplicating an
 	// update.
 	p.paymentsMtx.Lock(paymentHash)
 	defer p.paymentsMtx.Unlock(paymentHash)
 
-	payment, err := p.db.FetchPayment(paymentHash)
+	payment, err := p.db.FetchPayment(ctx, paymentHash)
 	if err != nil {
 		return nil, err
 	}

routing/mock_test.go

@@ -1,6 +1,7 @@
 package routing
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"sync"
@@ -509,8 +510,8 @@ func (m *mockControlTowerOld) FailPayment(phash lntypes.Hash,
 	return nil
 }
 
-func (m *mockControlTowerOld) FetchPayment(phash lntypes.Hash) (
-	paymentsdb.DBMPPayment, error) {
+func (m *mockControlTowerOld) FetchPayment(_ context.Context,
+	phash lntypes.Hash) (paymentsdb.DBMPPayment, error) {
 
 	m.Lock()
 	defer m.Unlock()
@@ -786,8 +787,8 @@ func (m *mockControlTower) FailPayment(phash lntypes.Hash,
 	return args.Error(0)
 }
 
-func (m *mockControlTower) FetchPayment(phash lntypes.Hash) (
-	paymentsdb.DBMPPayment, error) {
+func (m *mockControlTower) FetchPayment(_ context.Context,
+	phash lntypes.Hash) (paymentsdb.DBMPPayment, error) {
 
 	args := m.Called(phash)
 

routing/payment_lifecycle.go

@@ -1114,7 +1114,9 @@ func (p *paymentLifecycle) patchLegacyPaymentHash(
 func (p *paymentLifecycle) reloadInflightAttempts() (paymentsdb.DBMPPayment,
 	error) {
 
-	payment, err := p.router.cfg.Control.FetchPayment(p.identifier)
+	ctx := context.TODO()
+
+	payment, err := p.router.cfg.Control.FetchPayment(ctx, p.identifier)
 	if err != nil {
 		return nil, err
 	}
@@ -1139,8 +1141,10 @@ func (p *paymentLifecycle) reloadInflightAttempts() (paymentsdb.DBMPPayment,
 func (p *paymentLifecycle) reloadPayment() (paymentsdb.DBMPPayment,
 	*paymentsdb.MPPaymentState, error) {
 
+	ctx := context.TODO()
+
 	// Read the db to get the latest state of the payment.
-	payment, err := p.router.cfg.Control.FetchPayment(p.identifier)
+	payment, err := p.router.cfg.Control.FetchPayment(ctx, p.identifier)
 	if err != nil {
 		return nil, nil, err
 	}

routing/router.go

@@ -1064,13 +1064,15 @@ func (r *ChannelRouter) sendToRoute(htlcHash lntypes.Hash, rt *route.Route,
 	firstHopCustomRecords lnwire.CustomRecords) (*paymentsdb.HTLCAttempt,
 	error) {
 
+	ctx := context.TODO()
+
 	// Helper function to fail a payment. It makes sure the payment is only
 	// failed once so that the failure reason is not overwritten.
 	failPayment := func(paymentIdentifier lntypes.Hash,
 		reason paymentsdb.FailureReason) error {
 
 		payment, fetchErr := r.cfg.Control.FetchPayment(
-			paymentIdentifier,
+			ctx, paymentIdentifier,
 		)
 		if fetchErr != nil {
 			return fetchErr

routing/router_test.go

@@ -1097,7 +1097,9 @@ func TestSendPaymentErrorPathPruning(t *testing.T) {
 	require.Equal(t, paymentsdb.FailureReasonNoRoute, err)
 
 	// Inspect the two attempts that were made before the payment failed.
-	p, err := ctx.router.cfg.Control.FetchPayment(*payment.paymentHash)
+	p, err := ctx.router.cfg.Control.FetchPayment(
+		t.Context(), *payment.paymentHash,
+	)
 	require.NoError(t, err)
 
 	htlcs := p.GetHTLCs()