import { App } from 'firebase-admin/app';
import { BatchResponse, MessagingDevicesResponse } from 'firebase-admin/messaging';
import { FCMProviderEntity, SendMulticastFCM, SendToMessageFCM } from './types';
export declare class FCMProvider {
    private readonly _name?;
    private readonly _options?;
    constructor(params: FCMProviderEntity);
    /**
     * Initial FCM Provider
     * @returns
     */
    initialize(): App;
    /**
     *
     * @param value
     * @returns
     */
    private _clickToAction;
    /**
     *
     * @param params
     * @returns
     */
    sendMulticast(params: SendMulticastFCM): Promise<BatchResponse>;
    /**
     *
     * @param params
     * @returns
     */
    sendToDevice(params: SendMulticastFCM): Promise<MessagingDevicesResponse>;
    /**
     *
     * @param values
     * @returns
     */
    sendTopics(values: SendToMessageFCM): Promise<string>;
}
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