import { ConfigService } from '@nestjs/config';
import { INotification } from '../interfaces';
export declare class AppSyncService {
    private readonly config;
    private readonly logger;
    private readonly endpoint;
    private readonly hostname;
    private readonly apiKey;
    private readonly region;
    private readonly signer;
    constructor(config: ConfigService);
    sendMessage(msg: INotification): Promise<any>;
}