import { Collection, ObjectId } from "mongodb";
export declare class MongoLocksError extends Error {
    constructor(message?: string);
}
interface LockModel {
    _id: ObjectId;
    action: unknown;
    createdAt: Date;
    refreshedAt: Date;
    expiresAt: Date;
}
declare class Lock {
    _id: ObjectId;
    action: unknown;
    collection: Collection<LockModel>;
    constructor(_id: ObjectId, action: unknown, collection: Collection<LockModel>);
    locked: boolean;
    /**
     * Instead of calling `this.free` directly you can use the `using` syntax
     *
     * @returns true if the lock was successfully released. False if the lock was not found
     */
    free(): Promise<boolean>;
    /**
     * Refreshes the lock's TTL
     *
     * Automatically called every 10 seconds if the lock is still active, no
     * need to call this manually
     *
     * @returns true if the lock was successfully refreshed. False if the lock was not found
     */
    refresh(): Promise<boolean>;
    [Symbol.dispose](): void;
    [Symbol.asyncDispose](): Promise<boolean>;
}
export declare class LockManager {
    collection: Collection<LockModel>;
    private readonly ready;
    MongoLocksError: typeof MongoLocksError;
    constructor(collection: Collection);
    /**
     * Creates a DB lock based on the key provided
     *
     * @returns a function that when called will release the lock
     */
    lock(key: unknown): Promise<Lock | null>;
}
export type { LockModel, Lock };