import type { Clock, IdGenerator } from "./abstractions.js";
export interface LeaseHandle {
    readonly keyHash: string;
    readonly ownerId: string;
    readonly token: string;
    readonly expiresAt: Date;
    assertOwned(): Promise<void>;
    renew(ttlMs?: number): Promise<void>;
    release(): Promise<void>;
}
export interface LockStore {
    acquire(key: string, options: AcquireLeaseOptions): Promise<LeaseHandle>;
    close(): Promise<void>;
}
export interface FileLeaseLockOptions {
    directory: string;
    defaultTtlMs?: number;
    retryDelayMs?: number;
    clock?: Clock;
    idGenerator?: IdGenerator;
}
export interface AcquireLeaseOptions {
    ownerId: string;
    ttlMs?: number;
    waitTimeoutMs?: number;
    signal?: AbortSignal;
}
export declare class LeaseUnavailableError extends Error {
    readonly keyHash: string;
    constructor(keyHash: string);
}
export declare class LeaseLostError extends Error {
    readonly keyHash: string;
    constructor(keyHash: string);
}
/**
 * A cooperative local-filesystem lease based on atomic directory creation.
 * Callers should assert the fencing token immediately before consequential work.
 */
export declare class FileLeaseLock implements LockStore {
    #private;
    constructor(options: FileLeaseLockOptions);
    acquire(key: string, options: AcquireLeaseOptions): Promise<LeaseHandle>;
    isOwned(keyHash: string, token: string): Promise<boolean>;
    renew(keyHash: string, token: string, ttlMs: number): Promise<Date>;
    release(keyHash: string, token: string): Promise<void>;
    close(): Promise<void>;
}
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