multi: use sqldb.NoOpReset helper

Define a re-usable "reset" function, sqldb.NoOpReset, that can be used
for the reset parameter in sql ExecTx calls.

graph/db/sql_store.go

@@ -177,7 +177,7 @@ func (s *SQLStore) FetchLightningNode(pubKey route.Vertex) (
 		_, node, err = getNodeByPubKey(ctx, db, pubKey)
 
 		return err
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		return nil, fmt.Errorf("unable to fetch node: %w", err)
 	}
@@ -221,7 +221,7 @@ func (s *SQLStore) HasLightningNode(pubKey [33]byte) (time.Time, bool,
 		}
 
 		return nil
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		return time.Time{}, false,
 			fmt.Errorf("unable to fetch node: %w", err)
@@ -255,7 +255,7 @@ func (s *SQLStore) AddrsForNode(nodePub *btcec.PublicKey) (bool, []net.Addr,
 		}
 
 		return nil
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		return false, nil, fmt.Errorf("unable to get addresses for "+
 			"node(%x): %w", nodePub.SerializeCompressed(), err)
@@ -294,7 +294,7 @@ func (s *SQLStore) DeleteLightningNode(pubKey route.Vertex) error {
 		}
 
 		return err
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		return fmt.Errorf("unable to delete node: %w", err)
 	}
@@ -342,7 +342,7 @@ func (s *SQLStore) LookupAlias(pub *btcec.PublicKey) (string, error) {
 		alias = dbNode.Alias.String
 
 		return nil
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		return "", fmt.Errorf("unable to look up alias: %w", err)
 	}
@@ -370,7 +370,7 @@ func (s *SQLStore) SourceNode() (*models.LightningNode, error) {
 		_, node, err = getNodeByPubKey(ctx, db, nodePub)
 
 		return err
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		return nil, fmt.Errorf("unable to fetch source node: %w", err)
 	}
@@ -410,7 +410,7 @@ func (s *SQLStore) SetSourceNode(node *models.LightningNode) error {
 		}
 
 		return db.AddSourceNode(ctx, id)
-	}, func() {})
+	}, sqldb.NoOpReset)
 }
 
 // NodeUpdatesInHorizon returns all the known lightning node which have an
@@ -447,7 +447,7 @@ func (s *SQLStore) NodeUpdatesInHorizon(startTime,
 		}
 
 		return nil
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		return nil, fmt.Errorf("unable to fetch nodes: %w", err)
 	}

invoices/kv_sql_migration_test.go

@@ -76,7 +76,7 @@ func TestMigrationWithChannelDB(t *testing.T) {
 					ctxb, kvStore.Backend, kvStore, tx,
 					batchSize,
 				)
-			}, func() {},
+			}, sqldb.NoOpReset,
 		)
 		require.NoError(t, err)
 

invoices/sql_migration_test.go

@@ -325,7 +325,7 @@ func testMigrateSingleInvoiceRapid(t *rapid.T, store *SQLStore, mpp bool,
 		}
 
 		return nil
-	}, func() {})
+	}, sqldb.NoOpReset)
 	require.NoError(t, err)
 
 	// Fetch and compare each migrated invoice from the store with the

invoices/sql_store.go

@@ -322,7 +322,7 @@ func (i *SQLStore) AddInvoice(ctx context.Context,
 			AddedAt:   newInvoice.CreationDate.UTC(),
 			InvoiceID: invoiceID,
 		})
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		mappedSQLErr := sqldb.MapSQLError(err)
 		var uniqueConstraintErr *sqldb.ErrSQLUniqueConstraintViolation
@@ -702,7 +702,7 @@ func (i *SQLStore) LookupInvoice(ctx context.Context,
 		invoice, err = fetchInvoice(ctx, db, ref)
 
 		return err
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if txErr != nil {
 		return Invoice{}, txErr
 	}
@@ -1488,7 +1488,7 @@ func (i *SQLStore) UpdateInvoice(ctx context.Context, ref InvoiceRef,
 		)
 
 		return err
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if txErr != nil {
 		// If the invoice is already settled, we'll return the
 		// (unchanged) invoice and the ErrInvoiceAlreadySettled error.
@@ -1552,7 +1552,7 @@ func (i *SQLStore) DeleteInvoice(ctx context.Context,
 		}
 
 		return nil
-	}, func() {})
+	}, sqldb.NoOpReset)
 
 	if err != nil {
 		return fmt.Errorf("unable to delete invoices: %w", err)
@@ -1572,7 +1572,7 @@ func (i *SQLStore) DeleteCanceledInvoices(ctx context.Context) error {
 		}
 
 		return nil
-	}, func() {})
+	}, sqldb.NoOpReset)
 	if err != nil {
 		return fmt.Errorf("unable to delete invoices: %w", err)
 	}

sqldb/sqlutils.go

@@ -7,6 +7,10 @@ import (
 	"golang.org/x/exp/constraints"
 )
 
+// NoOpReset is a no-op function that can be used as a default
+// reset function ExecTx calls.
+var NoOpReset = func() {}
+
 // SQLInt32 turns a numerical integer type into the NullInt32 that sql/sqlc
 // uses when an integer field can be permitted to be NULL.
 //