import { Product } from './Product';
export declare enum CostType {
    Product = 1,
    Products = 2,
    AnyProducts = 3,
    Letters = 4
}
export type ProductCost = {
    type: CostType.Product;
    product: Product;
    amount: number;
};
export type ProductsCost = {
    type: CostType.Products;
    amount: Partial<Record<Product, number>>;
};
export type AnyProductsCost = {
    type: CostType.AnyProducts;
    amount: number;
};
export type LettersCost = {
    type: CostType.Letters;
    amount: number;
};
export type Cost = ProductCost | ProductsCost | AnyProductsCost | LettersCost;
export declare function cost(amount: number, product: Product): ProductCost;
export declare function cost(amount: number): AnyProductsCost;
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