import { ErrorUnion, PaymentFormUnion } from '../outputs';
/**
 * Returns an invoice payment form. This method should be called when the user presses
 * inlineKeyboardButtonBuy
 * @param {Object} params
 * @param {number} [params.chatId] - Chat identifier of the Invoice message
 * @param {number} [params.messageId] - Message identifier
 * @param {Object} state
 * @returns {PaymentFormUnion | ErrorUnion}
 */
export declare type GetPaymentFormMethod = <ResponseT = PaymentFormUnion>(params: GetPaymentFormParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface GetPaymentFormParams {
    /** Chat identifier of the Invoice message */
    chatId?: number;
    /** Message identifier */
    messageId?: number;
}