import { Transaction } from "../../../Transaction";
import { Iin } from "./Iin";
export type Monthly = Record<Monthly.Month, {
    count: Partial<Record<Iin, number>>;
    volume: Partial<Record<Iin, number>>;
}>;
export declare namespace Monthly {
    type Month = (typeof Month.values)[number];
    namespace Month {
        const values: readonly [1, 2, 3];
    }
    function getMonth(transaction: Transaction.CardTransaction): Monthly.Month;
    function empty(): Monthly;
    function update(previous: Monthly | undefined, transaction: Transaction.CardTransaction): Monthly;
    function merge(previous: Monthly | undefined, addition: Monthly | undefined): Monthly;
}