import { OnModuleInit } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
export declare class FirebaseService implements OnModuleInit {
    private readonly configService;
    private readonly logger;
    private admin;
    constructor(configService: ConfigService);
    onModuleInit(): void;
    get isEnabled(): boolean;
    sendPush(token: string, title: string, body: string, data?: Record<string, string>): Promise<boolean>;
}