import { Environment } from "./env";
interface PostMessage {
    channel: string;
    subject: string;
    data: unknown;
}
interface PostMessageLegacy {
    message: string;
    data: {
        [key: string]: string | boolean;
    };
}
interface PostMessageClientConfig {
    channel: string;
    environment?: Environment;
    target?: HTMLIFrameElement;
}
interface EventHandlers {
    [key: string]: (data: any) => void;
}
interface CreateCardTokenPostMessageData {
    access_token: string;
    card_holder: string;
    card_number: string;
    card_expiry: string;
    cvv: string;
}
interface CreatePurchasePostMessageData {
    access_token: string;
    amount: number;
    card_token: string;
    currency: string;
    extra?: {
        [key: string]: boolean | string;
    };
    hash: string;
    invoice: string;
    test?: boolean;
}
declare class PostMessageClient {
    private channel;
    private fzEnv;
    private target;
    private domain;
    private messageListener;
    constructor(config: PostMessageClientConfig);
    setEventListeners(handlers: EventHandlers, options?: {
        once?: boolean;
    }): void;
    setEventListenersLegacy(handlers: EventHandlers): void;
    removeEventListeners(): void;
    send(message: PostMessage | PostMessageLegacy): void;
}
export { PostMessageClient, };
export type { CreateCardTokenPostMessageData, CreatePurchasePostMessageData, PostMessage, PostMessageLegacy, PostMessageClientConfig };