chore: refactor

internal/repository/helpers.go

@@ -0,0 +1,18 @@
+package repository
+
+import "github.com/jmoiron/sqlx"
+
+// WithTx runs fn inside a transaction. If fn returns an error, the transaction
+// is rolled back; otherwise it is committed.
+func WithTx(db *sqlx.DB, fn func(*sqlx.Tx) error) error {
+	tx, err := db.Beginx()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	if err := fn(tx); err != nil {
+		return err
+	}
+	return tx.Commit()
+}