export declare class LockResult implements ILockResult {
    private _lock;
    private result;
    constructor(lock: ILock, result: Result);
    lock(ttl: number): Promise<Result>;
    unlock(): Promise<boolean>;
    get ok(): boolean;
    get ttl(): number;
}
/** Implements distributed locking. */
export interface ILock {
    /**
     * Applies the lock if it is not already applied, otherwise extends the lock TTL.
     * @param ttl TTL of the lock key. Must be positive integer.
     */
    lock(ttl: number): Promise<Result>;
    /** Releases the lock. */
    unlock(): Promise<boolean>;
}
/** Result of applying a lock. */
export declare type Result = {
    /** Success flag of applying a lock. */
    ok: boolean;
    /**
     * TTL of a lock in milliseconds.
     * Makes sense if operation failed, otherwise ttl is less than 0.
     */
    ttl: number;
};
/** Contains new lock and result of applying a lock. */
export interface ILockResult extends ILock, Result {
}