import { HoistModel } from '@xh/hoist/core';
/**
 * Configuration for a {@link PinPadModel} - a numeric keypad for collecting a PIN.
 *
 * @see PinPadModel
 */
export interface PinPadConfig {
    /** The length of the PIN to get from the user, default 4. */
    pinLength?: number;
    headerText?: string;
    subHeaderText?: string;
}
/**
 * Model for a PinPad - a numeric keypad prompt for collecting a PIN from the user.
 *
 * Tracks entered digits, validates PIN completion, and provides observable `value` and
 * `isComplete` getters. Supports configurable PIN length and custom header/subheader text.
 *
 * @see PinPad
 */
export declare class PinPadModel extends HoistModel {
    disabled: boolean;
    headerText: string;
    subHeaderText: string;
    errorText: string;
    private _enteredDigits;
    private _deleteWasLast;
    private _pinLength;
    constructor(config?: PinPadConfig);
    /**
     * The completed PIN entered by the user.  Observe this property to track the state
     * of user progress.
     *
     * @returns null if the user has not finished entering a PIN, otherwise the PIN
     *      the user entered.
     */
    get completedPin(): string;
    /**
     * Clear everything entered by the user, allowing the user to start entering a new PIN.
     */
    clear(): void;
    get activeIndex(): number;
    enterDigit(digit: any): void;
    deleteDigit(): void;
    get displayedDigits(): any[];
}