import { type RevisionLedgerData } from './types';
export declare const REVISION_LEDGER_FILE = ".nexus-revision-ledger.json";
export declare class LedgerStorage {
    private readonly baseDir;
    readonly filePath: string;
    constructor(baseDir?: string);
    exists(): boolean;
    read(): RevisionLedgerData;
    write(data: RevisionLedgerData): Promise<void>;
    update<T>(mutator: (current: RevisionLedgerData) => T | Promise<T>): Promise<T>;
    writeSync(data: RevisionLedgerData): void;
    updateSync<T>(mutator: (current: RevisionLedgerData) => T): T;
    private enqueueWrite;
}