/**
 * Just in case there are long running reads (possibly iterators), truncation may be blocked
 * Add this to an interval to guard against a growing WAL file to ensure truncation occurs.
 *
 * Currently only should be used in node environments.
 */
export declare function walSizeGuard(db: {
    exec: (sql: string) => void;
}, walFile: string, options: {
    restartMax: number;
    truncateMax: number;
}): void;