import { type KDFInput } from "@noble/hashes/utils.js";
/** KrowOpts are krow key derivation options. */
export type KrowOpts = {
    /** m is the memory size in KiB. */
    m: number;
    /** t is the time factor. */
    t: number;
    /** s is the security mode as a percentage of data-dependent lookups. */
    s: number;
    /** dkLen is the derived key length in bytes (default = 32). */
    dkLen?: number;
    /**
     * asyncTick is the most time in ms where the asynchronous function
     * can block execution (default = 10).
     */
    asyncTick?: number;
    /** random is the fill phase random dependency mode (default = true). */
    random?: boolean;
    /** mutable is the lookup phase mutability (default = true). */
    mutable?: boolean;
    /** onProgress is a progress callback. */
    onProgress?: (completed: number, total: number) => void;
};
/**
 * The krow key derivation function, synchronous version.
 * @example
 * const PASSWORD = "Unmake the Wild Light";
 * const SALT = "65daysofstatic";
 * const opts: KrowOpts = { m: 16 * 1024, t: 2, s: 25 };
 * const dk = krow(PASSWORD, SALT, null, opts);
 */
export declare function krow(password: KDFInput, salt: KDFInput, context: string | null, opts: KrowOpts): Uint8Array;
/**
 * The krow key derivation function, asynchronous version.
 * @example
 * const PASSWORD = "Unmake the Wild Light";
 * const SALT = "65daysofstatic";
 * const opts: KrowOpts = { m: 16 * 1024, t: 2, s: 25 };
 * const dk = await krowAsync(PASSWORD, SALT, null, opts);
 */
export declare function krowAsync(password: KDFInput, salt: KDFInput, context: string | null, opts: KrowOpts): Promise<Uint8Array>;
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