multi: thread context through RegisterAttempt method

diff --git a/payments/db/interface.go b/payments/db/interface.go
index 2d03356..3af2dfb 100644
--- a/payments/db/interface.go
+++ b/payments/db/interface.go
@@ -75,7 +75,8 @@ type PaymentControl interface {
 	//   - Result: 1700 sats sent, exceeding the payment amount
 	// The payment router/controller layer is responsible for ensuring
 	// serialized access per payment hash.
-	RegisterAttempt(lntypes.Hash, *HTLCAttemptInfo) (*MPPayment, error)
+	RegisterAttempt(context.Context, lntypes.Hash,
+		*HTLCAttemptInfo) (*MPPayment, error)
 
 	// SettleAttempt marks the given attempt settled with the preimage. If
 	// this is a multi shard payment, this might implicitly mean the
diff --git a/payments/db/kv_store.go b/payments/db/kv_store.go
index 81b257c..5511bf8 100644
--- a/payments/db/kv_store.go
+++ b/payments/db/kv_store.go
@@ -359,7 +359,7 @@ func deserializePaymentIndex(r io.Reader) (lntypes.Hash, error) {
 
 // RegisterAttempt atomically records the provided HTLCAttemptInfo to the
 // DB.
-func (p *KVStore) RegisterAttempt(paymentHash lntypes.Hash,
+func (p *KVStore) RegisterAttempt(_ context.Context, paymentHash lntypes.Hash,
 	attempt *HTLCAttemptInfo) (*MPPayment, error) {
 
 	// Serialize the information before opening the db transaction.
diff --git a/payments/db/kv_store_test.go b/payments/db/kv_store_test.go
index 6837134..0c51dcc 100644
--- a/payments/db/kv_store_test.go
+++ b/payments/db/kv_store_test.go
@@ -85,7 +85,7 @@ func TestKVStoreDeleteNonInFlight(t *testing.T) {
 			t.Fatalf("unable to send htlc message: %v", err)
 		}
 		_, err = paymentDB.RegisterAttempt(
-			info.PaymentIdentifier, attempt,
+			ctx, info.PaymentIdentifier, attempt,
 		)
 		if err != nil {
 			t.Fatalf("unable to send htlc message: %v", err)
diff --git a/payments/db/payment_test.go b/payments/db/payment_test.go
index 4b2cbcb..8e2c7a4 100644
--- a/payments/db/payment_test.go
+++ b/payments/db/payment_test.go
@@ -151,7 +151,7 @@ func createTestPayments(t *testing.T, p DB, payments []*payment) {
 		require.NoError(t, err, "unable to send htlc message")
 
 		// Register and fail the first attempt for all payments.
-		_, err = p.RegisterAttempt(info.PaymentIdentifier, attempt)
+		_, err = p.RegisterAttempt(ctx, info.PaymentIdentifier, attempt)
 		require.NoError(t, err, "unable to send htlc message")
 
 		htlcFailure := HTLCFailUnreadable
@@ -175,7 +175,7 @@ func createTestPayments(t *testing.T, p DB, payments []*payment) {
 		require.NoError(t, err)
 		attemptID++
 
-		_, err = p.RegisterAttempt(info.PaymentIdentifier, attempt)
+		_, err = p.RegisterAttempt(ctx, info.PaymentIdentifier, attempt)
 		require.NoError(t, err, "unable to send htlc message")
 
 		switch payments[i].status {
@@ -592,7 +592,7 @@ func TestMPPRecordValidation(t *testing.T) {
 		info.Value, [32]byte{1},
 	)
 
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt)
+	_, err = paymentDB.RegisterAttempt(ctx, info.PaymentIdentifier, attempt)
 	require.NoError(t, err, "unable to send htlc message")
 
 	// Now try to register a non-MPP attempt, which should fail.
@@ -604,21 +604,27 @@ func TestMPPRecordValidation(t *testing.T) {
 
 	attempt2.Route.FinalHop().MPP = nil
 
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt2)
+	_, err = paymentDB.RegisterAttempt(
+		ctx, info.PaymentIdentifier, attempt2,
+	)
 	require.ErrorIs(t, err, ErrMPPayment)
 
 	// Try to register attempt one with a different payment address.
 	attempt2.Route.FinalHop().MPP = record.NewMPP(
 		info.Value, [32]byte{2},
 	)
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt2)
+	_, err = paymentDB.RegisterAttempt(
+		ctx, info.PaymentIdentifier, attempt2,
+	)
 	require.ErrorIs(t, err, ErrMPPPaymentAddrMismatch)
 
 	// Try registering one with a different total amount.
 	attempt2.Route.FinalHop().MPP = record.NewMPP(
 		info.Value/2, [32]byte{1},
 	)
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt2)
+	_, err = paymentDB.RegisterAttempt(
+		ctx, info.PaymentIdentifier, attempt2,
+	)
 	require.ErrorIs(t, err, ErrMPPTotalAmountMismatch)
 
 	// Create and init a new payment. This time we'll check that we cannot
@@ -641,7 +647,9 @@ func TestMPPRecordValidation(t *testing.T) {
 	require.NoError(t, err, "unable to send htlc message")
 
 	attempt.Route.FinalHop().MPP = nil
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt)
+	_, err = paymentDB.RegisterAttempt(
+		ctx, info.PaymentIdentifier, attempt,
+	)
 	require.NoError(t, err, "unable to send htlc message")
 
 	// Attempt to register an MPP attempt, which should fail.
@@ -655,7 +663,9 @@ func TestMPPRecordValidation(t *testing.T) {
 		info.Value, [32]byte{1},
 	)
 
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt2)
+	_, err = paymentDB.RegisterAttempt(
+		ctx, info.PaymentIdentifier, attempt2,
+	)
 	require.ErrorIs(t, err, ErrNonMPPayment)
 }
 
@@ -1758,7 +1768,7 @@ func TestSwitchDoubleSend(t *testing.T) {
 	require.ErrorIs(t, err, ErrPaymentExists)
 
 	// Record an attempt.
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt)
+	_, err = paymentDB.RegisterAttempt(ctx, info.PaymentIdentifier, attempt)
 	require.NoError(t, err, "unable to send htlc message")
 	assertDBPaymentstatus(
 		t, paymentDB, info.PaymentIdentifier, StatusInFlight,
@@ -1869,7 +1879,7 @@ func TestSwitchFail(t *testing.T) {
 	// Record a new attempt. In this test scenario, the attempt fails.
 	// However, this is not communicated to control tower in the current
 	// implementation. It only registers the initiation of the attempt.
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt)
+	_, err = paymentDB.RegisterAttempt(ctx, info.PaymentIdentifier, attempt)
 	require.NoError(t, err, "unable to register attempt")
 
 	htlcReason := HTLCFailUnreadable
@@ -1899,7 +1909,7 @@ func TestSwitchFail(t *testing.T) {
 	)
 	require.NoError(t, err)
 
-	_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, attempt)
+	_, err = paymentDB.RegisterAttempt(ctx, info.PaymentIdentifier, attempt)
 	require.NoError(t, err, "unable to send htlc message")
 	assertDBPaymentstatus(
 		t, paymentDB, info.PaymentIdentifier, StatusInFlight,
@@ -2017,7 +2027,7 @@ func TestMultiShard(t *testing.T) {
 			attempts = append(attempts, a)
 
 			_, err = paymentDB.RegisterAttempt(
-				info.PaymentIdentifier, a,
+				ctx, info.PaymentIdentifier, a,
 			)
 			if err != nil {
 				t.Fatalf("unable to send htlc message: %v", err)
@@ -2049,7 +2059,9 @@ func TestMultiShard(t *testing.T) {
 			info.Value, [32]byte{1},
 		)
 
-		_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, b)
+		_, err = paymentDB.RegisterAttempt(
+			ctx, info.PaymentIdentifier, b,
+		)
 		require.ErrorIs(t, err, ErrValueExceedsAmt)
 
 		// Fail the second attempt.
@@ -2156,7 +2168,9 @@ func TestMultiShard(t *testing.T) {
 			info.Value, [32]byte{1},
 		)
 
-		_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, b)
+		_, err = paymentDB.RegisterAttempt(
+			ctx, info.PaymentIdentifier, b,
+		)
 		if test.settleFirst {
 			require.ErrorIs(
 				t, err, ErrPaymentPendingSettled,
@@ -2255,7 +2269,9 @@ func TestMultiShard(t *testing.T) {
 		)
 
 		// Finally assert we cannot register more attempts.
-		_, err = paymentDB.RegisterAttempt(info.PaymentIdentifier, b)
+		_, err = paymentDB.RegisterAttempt(
+			ctx, info.PaymentIdentifier, b,
+		)
 		require.ErrorIs(t, err, registerErr)
 	}
 
@@ -2658,7 +2674,7 @@ func TestQueryPayments(t *testing.T) {
 			require.NoError(t, err)
 
 			_, err = paymentDB.RegisterAttempt(
-				lastPaymentInfo.PaymentIdentifier,
+				ctx, lastPaymentInfo.PaymentIdentifier,
 				&attempt.HTLCAttemptInfo,
 			)
 			require.NoError(t, err)
@@ -2842,7 +2858,7 @@ func TestFetchInFlightPaymentsMultipleAttempts(t *testing.T) {
 	require.NoError(t, err)
 
 	_, err = paymentDB.RegisterAttempt(
-		info.PaymentIdentifier, attempt1,
+		ctx, info.PaymentIdentifier, attempt1,
 	)
 	require.NoError(t, err)
 
@@ -2850,7 +2866,7 @@ func TestFetchInFlightPaymentsMultipleAttempts(t *testing.T) {
 	require.NoError(t, err)
 
 	_, err = paymentDB.RegisterAttempt(
-		info.PaymentIdentifier, attempt2,
+		ctx, info.PaymentIdentifier, attempt2,
 	)
 	require.NoError(t, err)
 
diff --git a/payments/db/sql_store.go b/payments/db/sql_store.go
index cacd5cd..8c963d3 100644
--- a/payments/db/sql_store.go
+++ b/payments/db/sql_store.go
@@ -1496,11 +1496,9 @@ func (s *SQLStore) insertRouteHops(ctx context.Context, db SQLQueries,
 // the PaymentWriter interface and ultimately the DB interface. It represents
 // step 2 in the payment lifecycle control flow, called after InitPayment and
 // potentially multiple times for multi-path payments.
-func (s *SQLStore) RegisterAttempt(paymentHash lntypes.Hash,
+func (s *SQLStore) RegisterAttempt(ctx context.Context, paymentHash lntypes.Hash,
 	attempt *HTLCAttemptInfo) (*MPPayment, error) {
 
-	ctx := context.TODO()
-
 	var mpPayment *MPPayment
 
 	err := s.db.ExecTx(ctx, sqldb.WriteTxOpt(), func(db SQLQueries) error {
diff --git a/routing/control_tower.go b/routing/control_tower.go
index 8df87b4..28432d7 100644
--- a/routing/control_tower.go
+++ b/routing/control_tower.go
@@ -31,7 +31,8 @@ type ControlTower interface {
 	// RegisterAttempt atomically records the provided HTLCAttemptInfo.
 	//
 	// NOTE: Subscribers should be notified by the new state of the payment.
-	RegisterAttempt(lntypes.Hash, *paymentsdb.HTLCAttemptInfo) error
+	RegisterAttempt(context.Context, lntypes.Hash,
+		*paymentsdb.HTLCAttemptInfo) error
 
 	// SettleAttempt marks the given attempt settled with the preimage. If
 	// this is a multi shard payment, this might implicitly mean the the
@@ -196,13 +197,13 @@ func (p *controlTower) DeleteFailedAttempts(paymentHash lntypes.Hash) error {
 
 // RegisterAttempt atomically records the provided HTLCAttemptInfo to the
 // DB.
-func (p *controlTower) RegisterAttempt(paymentHash lntypes.Hash,
-	attempt *paymentsdb.HTLCAttemptInfo) error {
+func (p *controlTower) RegisterAttempt(ctx context.Context,
+	paymentHash lntypes.Hash, attempt *paymentsdb.HTLCAttemptInfo) error {
 
 	p.paymentsMtx.Lock(paymentHash)
 	defer p.paymentsMtx.Unlock(paymentHash)
 
-	payment, err := p.db.RegisterAttempt(paymentHash, attempt)
+	payment, err := p.db.RegisterAttempt(ctx, paymentHash, attempt)
 	if err != nil {
 		return err
 	}
diff --git a/routing/control_tower_test.go b/routing/control_tower_test.go
index 0993fb2..20bdd17 100644
--- a/routing/control_tower_test.go
+++ b/routing/control_tower_test.go
@@ -92,7 +92,9 @@ func TestControlTowerSubscribeSuccess(t *testing.T) {
 	require.NoError(t, err, "expected subscribe to succeed, but got")
 
 	// Register an attempt.
-	err = pControl.RegisterAttempt(info.PaymentIdentifier, attempt)
+	err = pControl.RegisterAttempt(
+		t.Context(), info.PaymentIdentifier, attempt,
+	)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -221,7 +223,9 @@ func TestKVStoreSubscribeAllSuccess(t *testing.T) {
 	require.NoError(t, err, "expected subscribe to succeed, but got: %v")
 
 	// Register an attempt.
-	err = pControl.RegisterAttempt(info1.PaymentIdentifier, attempt1)
+	err = pControl.RegisterAttempt(
+		t.Context(), info1.PaymentIdentifier, attempt1,
+	)
 	require.NoError(t, err)
 
 	// Initiate a second payment after the subscription is already active.
@@ -232,7 +236,9 @@ func TestKVStoreSubscribeAllSuccess(t *testing.T) {
 	require.NoError(t, err)
 
 	// Register an attempt on the second payment.
-	err = pControl.RegisterAttempt(info2.PaymentIdentifier, attempt2)
+	err = pControl.RegisterAttempt(
+		t.Context(), info2.PaymentIdentifier, attempt2,
+	)
 	require.NoError(t, err)
 
 	// Mark the first payment as successful.
@@ -341,7 +347,9 @@ func TestKVStoreSubscribeAllImmediate(t *testing.T) {
 	require.NoError(t, err)
 
 	// Register a payment update.
-	err = pControl.RegisterAttempt(info.PaymentIdentifier, attempt)
+	err = pControl.RegisterAttempt(
+		t.Context(), info.PaymentIdentifier, attempt,
+	)
 	require.NoError(t, err)
 
 	subscription, err := pControl.SubscribeAllPayments()
@@ -414,7 +422,9 @@ func TestKVStoreUnsubscribeSuccess(t *testing.T) {
 	subscription1.Close()
 
 	// Register a payment update.
-	err = pControl.RegisterAttempt(info.PaymentIdentifier, attempt)
+	err = pControl.RegisterAttempt(
+		t.Context(), info.PaymentIdentifier, attempt,
+	)
 	require.NoError(t, err)
 
 	// Assert only subscription 2 receives the update.
@@ -479,10 +489,10 @@ func testKVStoreSubscribeFail(t *testing.T, registerAttempt,
 	// making any attempts at all.
 	if registerAttempt {
 		// Register an attempt.
-		err = pControl.RegisterAttempt(info.PaymentIdentifier, attempt)
-		if err != nil {
-			t.Fatal(err)
-		}
+		err = pControl.RegisterAttempt(
+			t.Context(), info.PaymentIdentifier, attempt,
+		)
+		require.NoError(t, err)
 
 		// Fail the payment attempt.
 		failInfo := paymentsdb.HTLCFailInfo{
diff --git a/routing/mock_test.go b/routing/mock_test.go
index 5b9d485..daad344 100644
--- a/routing/mock_test.go
+++ b/routing/mock_test.go
@@ -354,8 +354,8 @@ func (m *mockControlTowerOld) DeleteFailedAttempts(phash lntypes.Hash) error {
 	return nil
 }
 
-func (m *mockControlTowerOld) RegisterAttempt(phash lntypes.Hash,
-	a *paymentsdb.HTLCAttemptInfo) error {
+func (m *mockControlTowerOld) RegisterAttempt(_ context.Context,
+	phash lntypes.Hash, a *paymentsdb.HTLCAttemptInfo) error {
 
 	if m.registerAttempt != nil {
 		m.registerAttempt <- registerAttemptArgs{a}
@@ -746,8 +746,8 @@ func (m *mockControlTower) DeleteFailedAttempts(phash lntypes.Hash) error {
 	return args.Error(0)
 }
 
-func (m *mockControlTower) RegisterAttempt(phash lntypes.Hash,
-	a *paymentsdb.HTLCAttemptInfo) error {
+func (m *mockControlTower) RegisterAttempt(_ context.Context,
+	phash lntypes.Hash, a *paymentsdb.HTLCAttemptInfo) error {
 
 	args := m.Called(phash, a)
 	return args.Error(0)
diff --git a/routing/payment_lifecycle.go b/routing/payment_lifecycle.go
index 4eb78c8..0499475 100644
--- a/routing/payment_lifecycle.go
+++ b/routing/payment_lifecycle.go
@@ -584,6 +584,8 @@ func (p *paymentLifecycle) collectResult(
 func (p *paymentLifecycle) registerAttempt(rt *route.Route,
 	remainingAmt lnwire.MilliSatoshi) (*paymentsdb.HTLCAttempt, error) {
 
+	ctx := context.TODO()
+
 	// If this route will consume the last remaining amount to send
 	// to the receiver, this will be our last shard (for now).
 	isLastAttempt := rt.ReceiverAmt() == remainingAmt
@@ -601,7 +603,7 @@ func (p *paymentLifecycle) registerAttempt(rt *route.Route,
 	// Switch for its whereabouts. The route is needed to handle the result
 	// when it eventually comes back.
 	err = p.router.cfg.Control.RegisterAttempt(
-		p.identifier, &attempt.HTLCAttemptInfo,
+		ctx, p.identifier, &attempt.HTLCAttemptInfo,
 	)
 
 	return attempt, err