import type { UnderstandingConsentReceipt } from './types.js';
export declare function grantUnderstandingConsent(input: Omit<UnderstandingConsentReceipt, 'id' | 'grantedAt' | 'revokedAt'> & {
    nowMs?: number;
}): UnderstandingConsentReceipt;
export declare function getUnderstandingConsent(id: string): UnderstandingConsentReceipt | null;
export declare function getActiveUnderstandingConsent(grantId: string): UnderstandingConsentReceipt | null;
export declare function revokeUnderstandingConsent(grantId: string, nowMs?: number): number;