import type { Generator, HashFn } from './types.js';
/**
 * Fortuna CSPRNG, spec §9.3-§9.5
 *
 * Use `Fortuna.create({ generator, hash })` to instantiate. Direct construction is not allowed.
 */
export declare class Fortuna {
    private static readonly NUM_POOLS;
    private static readonly RESEED_LIMIT;
    private static readonly MS_PER_RESEED;
    private static readonly NODE_STATS_INTERVAL;
    private static readonly CRYPTO_INTERVAL;
    private gen;
    private hash;
    private poolHash;
    private poolEntropy;
    private genKey;
    private genCnt;
    private reseedCnt;
    private lastReseed;
    private entropyLevel;
    private eventId;
    private active;
    private disposed;
    private msPerReseed;
    private robin;
    private boundCollectors;
    private timers;
    static create(opts: {
        generator: Generator;
        hash: HashFn;
        msPerReseed?: number;
        entropy?: Uint8Array;
    }): Promise<Fortuna>;
    private constructor();
    /** Get n random bytes. Always returns Uint8Array, instance is guaranteed seeded after create(). */
    get(length: number): Uint8Array;
    /** Add external entropy to the pools. */
    addEntropy(entropy: Uint8Array): void;
    /** Get estimated available entropy in bytes. */
    getEntropy(): number;
    /** Permanently dispose this instance. Wipes key material, stops all collectors. */
    stop(): void;
    /** Get length pseudo-random bytes., spec §9.4 */
    private pseudoRandomData;
    /** Reseed the generator, spec §9.4 */
    private reseed;
    /** Drain pool 0 into a fresh seed and reseed. Used by the deterministic
     *  test factory; production reseeds in get() walk the §9.5.5 schedule
     *  across all pools, not just pool 0. Caller is responsible for any
     *  entropy-threshold check. */
    private reseedFromPool0;
    /** Increment little-endian counter., spec §9.4 */
    private incrementCounter;
    /** Add an event to a pool via hash chaining: poolHash[i] = hash(poolHash[i] ‖ eventId ‖ data). */
    private addRandomEvent;
    private initialize;
    private startCollectors;
    private stopCollectors;
    private throttle;
    private collectorKeyboard;
    private collectorMouse;
    private collectorClick;
    private collectorTouch;
    private collectorScroll;
    private collectorMotion;
    private collectorTime;
    private collectorDom;
    private collectorCryptoRandom;
    private captureHrtime;
    private collectNodeStats;
}