import { Context, ContextFactoryOptions, ContextDefaultState } from './context';
import { kSerializeData } from '../../utils/constants';
export type DonutSubscriptionPriceContextType = 'donut_subscription_price';
export type DonutSubscriptionPriceContextSubType = 'donut_subscription_price_changed';
export interface IDonutSubscriptionPriceContextPayload {
    user_id: number;
    amount_old: number;
    amount_new: number;
    amount_diff: number;
    amount_diff_without_fee: number;
}
export type DonutSubscriptionPriceContextOptions<S> = ContextFactoryOptions<IDonutSubscriptionPriceContextPayload, S>;
export declare class DonutSubscriptionPriceContext<S = ContextDefaultState> extends Context<IDonutSubscriptionPriceContextPayload, S, DonutSubscriptionPriceContextType, DonutSubscriptionPriceContextSubType> {
    constructor(options: DonutSubscriptionPriceContextOptions<S>);
    /**
     * Checks if subscription changed
     */
    get isChanged(): boolean;
    /**
     * Returns the id of the user who interacts with the vk donut
     */
    get userId(): number;
    /**
     * Returns the old amount
     */
    get oldAmount(): number;
    /**
     * Returns the new amount
     */
    get newAmount(): number;
    /**
     * Returns the diff amount
     */
    get diffAmount(): number;
    /**
     * Returns the diff amount without fee
     */
    get diffAmountWithoutFee(): number;
    /**
     * Returns the custom data
     */
    [kSerializeData](): object;
}