import { KDFChain } from './kdf-chain.js';
import type { ResolveHandle, SkippedKeyStoreOpts } from './types.js';
export declare class SkippedKeyStore {
    private _store;
    private _maxCacheSize;
    private _maxSkipPerResolve;
    constructor(opts?: SkippedKeyStoreOpts);
    private _evictOldest;
    resolve(chain: KDFChain, counter: number): ResolveHandle;
    private _makeHandle;
    advanceToBoundary(chain: KDFChain, pn: number): void;
    get size(): number;
    wipeAll(): void;
}