export interface AgingBucket {
    key: string;
    label: string;
    /** Días vencidos desde (inclusive). `current` usa -Infinity..0. */
    from: number;
    /** Días vencidos hasta (inclusive). `null` = sin tope. */
    to: number | null;
}
export declare const DEFAULT_AGING_BUCKETS: AgingBucket[];
export interface AgingDoc {
    party_id: string;
    party_name?: string;
    due_at: string | null;
    issued_at: string;
    balance: number;
}
export interface AgingRow {
    party_id: string;
    party_name?: string;
    buckets: Record<string, number>;
    total: number;
    overdue: number;
    oldest_overdue_days: number;
}
/** Días vencidos al corte (negativo = falta para vencer). Fechas en ISO (día). */
export declare function daysOverdue(dueISO: string, asOfISO: string): number;
export declare function bucketFor(days: number, buckets?: readonly AgingBucket[]): string;
/** Agrupa por contraparte y tramo. Saldos ≤ 0 se ignoran (anticipos van aparte). */
export declare function computeAging(docs: readonly AgingDoc[], asOfISO: string, buckets?: readonly AgingBucket[]): {
    rows: AgingRow[];
    totals: Record<string, number>;
    total: number;
};
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