import type { FunnelUserAnswers } from '../sdk/userAnswers.js';
type FunnelAnswerDraftScope = {
    funnelId: string | null | undefined;
    funnelVersionId: string | null | undefined;
    userId: string | null | undefined;
};
export declare const buildFunnelAnswerDraftStorageKey: (scope: FunnelAnswerDraftScope) => string | null;
export declare const readFunnelAnswerDraft: (scope: FunnelAnswerDraftScope, nowMs?: number) => FunnelUserAnswers | null;
export declare const writeFunnelAnswerDraft: (scope: FunnelAnswerDraftScope, answers: FunnelUserAnswers, nowMs?: number) => boolean;
export declare const clearFunnelAnswerDraft: (scope: FunnelAnswerDraftScope) => void;
export {};