import { UI_EVENT } from './ui-request';
import type { MessageFactoryFn } from './utils';
import type { ConnectSettings } from '../types';
export declare const IFRAME: {
    readonly INIT: "iframe-init";
    readonly INIT_BRIDGE: "iframe-init-bridge";
    readonly CALL: "iframe-call";
    readonly CANCEL: "iframe-cancel";
    readonly SWITCH_TRANSPORT: "iframe-switch-transport";
    readonly CALLBACK: "iframe-callback";
};
export interface IFrameInit {
    type: typeof IFRAME.INIT;
    payload: {
        settings: ConnectSettings;
    };
}
export interface IFrameBridge {
    type: typeof IFRAME.INIT_BRIDGE;
    payload: unknown;
}
export interface IFrameSwitchTransport {
    type: typeof IFRAME.SWITCH_TRANSPORT;
    payload: {
        env: ConnectSettings['env'];
    };
}
export interface IFrameCallback {
    type: typeof IFRAME.CALLBACK;
    payload: {
        callbackId: string;
        data?: any;
        error?: any;
        finished?: boolean;
    };
}
export type IFrameEvent = IFrameInit | IFrameBridge | IFrameSwitchTransport | IFrameCallback;
export type IFrameEventMessage = IFrameEvent & {
    event: typeof UI_EVENT;
};
export declare const createIFrameMessage: MessageFactoryFn<typeof UI_EVENT, IFrameEvent>;
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