import Encryptor from "../Encryptor";
import Message from "../Message";
declare class DecryptMessageMixin {
    /**
     * 解密消息
     * @returns
     */
    decryptMessage(message: Message, encryptor: Encryptor, signature: string, timestamp: number, nonce: string): Promise<Message>;
    protected validateSignature(token: string, ciphertext: string, signature: string, timestamp: number, nonce: string): void;
}
export = DecryptMessageMixin;