import { LivenessEngine, LivenessCallbacks, LivenessSoundOptions, LivenessStepKey } from "./engine";
export type LivenessTheme = {
    progressColor?: string;
    progressErrorColor?: string;
    progressWidth?: number;
    progressLineCap?: "round" | "square" | "butt";
    overlayColor?: string;
    overlayErrorColor?: string;
};
export type StartLivenessOptions = {
    container?: HTMLElement;
    /** If true, render inside `container` instead of taking over the viewport. Container should have explicit width and height. */
    embed?: boolean;
    /** Visible face frame shape. Defaults to "oval". */
    shape?: "oval" | "circle";
    /** If false, hides SDK-provided instruction text, step dots, position hint, gesture icon and loading text. Sounds still play. Default true. */
    showInstructions?: boolean;
    theme?: LivenessTheme;
    /** Minimum diameter of the visible shape in CSS pixels (so it stays usable on small screens). Default 220. */
    minSize?: number;
    modelUrl?: string;
    wasmUrl?: string;
    callbacks: LivenessCallbacks;
    sounds?: LivenessSoundOptions;
    /** Subset of challenges to run, e.g. `["nod", "blink", "mouth"]`. Default: all 5. */
    steps?: LivenessStepKey[];
    /** Shuffle the selected step order. Default true. */
    shuffleSteps?: boolean;
};
export declare function startLivenessWithUI(options: StartLivenessOptions): LivenessEngine;