import { CDNFileType, PadproAppMessagePayload } from '../schemas';
export declare class CDNManager {
    private wechatGateway;
    private cacheManager;
    private cdnInfo?;
    constructor();
    /**
     * Get CDN DNS server to send large file
     */
    getCDNServerIP(): Promise<void>;
    uploadFile(toId: string, data: string, fileName: string, fileExt: string): Promise<PadproAppMessagePayload>;
    downloadFile(fileId: string, aesKey: string, totalLen: number, fileType: CDNFileType): Promise<Buffer>;
    private _downloadFile;
    private _checkFileMd5;
    private _uploadFile;
    private sendCdnRequest;
    private _sendCdnRequest;
}
//# sourceMappingURL=cdn-manager.d.ts.map