import type { IChallengeAssessRequest, IChallengeDecision, IChallengeRenderRequest, IChallengeRenderResponse, IChallengeType, IChallengeTypeManifest, IChallengeVerifyRequest, IChallengeVerifyResult } from '../interfaces.js';
export interface IWaitChallengeTypeOptions {
    defaultWaitSeconds?: number;
    defaultTtlSeconds?: number;
    maxWaitSeconds?: number;
    maxTtlSeconds?: number;
    maxStates?: number;
}
export declare class WaitChallengeType implements IChallengeType {
    readonly challengeType = "wait";
    private readonly defaultWaitSeconds;
    private readonly defaultTtlSeconds;
    private readonly maxWaitSeconds;
    private readonly maxTtlSeconds;
    private readonly maxStates;
    private states;
    private cleanupTimer?;
    private nextCleanupAt?;
    constructor(optionsArg?: IWaitChallengeTypeOptions);
    getManifest(): IChallengeTypeManifest;
    assess(requestArg: IChallengeAssessRequest): Promise<IChallengeDecision>;
    render(requestArg: IChallengeRenderRequest): Promise<IChallengeRenderResponse>;
    verify(requestArg: IChallengeVerifyRequest): Promise<IChallengeVerifyResult>;
    private getNumberSetting;
    private boundNumber;
    private normalizeNumberOption;
    private cleanupExpired;
    private enforceMaxStates;
    private scheduleCleanup;
    private scheduleNextCleanupFromStates;
    private clearCleanupTimer;
    private stateToSettings;
    private settingsToState;
    private renderHtml;
    private escapeHtml;
    private jsonForHtmlScript;
}