tapcfg+tapdb: move and export DatabaseBackend

Author: guggero

tapcfg/server.go

@@ -27,13 +27,6 @@ import (
 	"github.com/lightningnetwork/lnd/signal"
 )
 
-// databaseBackend is an interface that contains all methods our different
-// database backends implement.
-type databaseBackend interface {
-	tapdb.BatchedQuerier
-	WithTx(tx *sql.Tx) *sqlc.Queries
-}
-
 // genServerConfig generates a server config from the given tapd config.
 //
 // NOTE: The RPCConfig and SignalInterceptor fields must be set by the caller
@@ -44,7 +37,7 @@ func genServerConfig(cfg *Config, cfgLogger btclog.Logger,
 
 	var (
 		err    error
-		db     databaseBackend
+		db     tapdb.DatabaseBackend
 		dbType sqlc.BackendType
 	)
 

tapdb/migrations.go

@@ -2,6 +2,7 @@ package tapdb
 
 import (
 	"bytes"
+	"database/sql"
 	"errors"
 	"fmt"
 	"io"
@@ -14,6 +15,7 @@ import (
 	"github.com/golang-migrate/migrate/v4/database"
 	"github.com/golang-migrate/migrate/v4/source/httpfs"
 	"github.com/lightninglabs/taproot-assets/fn"
+	"github.com/lightninglabs/taproot-assets/tapdb/sqlc"
 )
 
 const (
@@ -25,6 +27,13 @@ const (
 	LatestMigrationVersion = 31
 )
 
+// DatabaseBackend is an interface that contains all methods our different
+// Database backends implement.
+type DatabaseBackend interface {
+	BatchedQuerier
+	WithTx(tx *sql.Tx) *sqlc.Queries
+}
+
 // MigrationTarget is a functional option that can be passed to applyMigrations
 // to specify a target version to migrate to. `currentDbVersion` is the current
 // (migration) version of the database, or None if unknown.