export type MembershipEffectiveStatus = "active" | "expired" | "none";
export declare function deriveMembershipEffectiveStatus(input: {
    status?: string | null;
    expiresAt?: string | null;
} | null | undefined): MembershipEffectiveStatus;
export declare function isMembershipActive(input: {
    status?: string | null;
    expiresAt?: string | null;
} | null | undefined): boolean;
export declare function isMembershipExpiringSoon(expiresAt: string | null | undefined, withinDays?: number): boolean;
export declare function daysUntilMembershipExpiry(expiresAt: string | null | undefined): number | null;
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