/**
 * @internal
 */
export declare class WxCrypto {
    private readonly token;
    private readonly key;
    private readonly iv;
    readonly id: string;
    static createNonceStr(): string;
    static createTimestamp(): string;
    constructor(config: {
        token: string;
        encodingAESKey: string;
        id: string;
    });
    signature(args: {
        timestamp: string;
        nonce: string;
        encrypt: string;
    }): string;
    decrypt(text: string): {
        message: string;
        id: string;
    };
    encrypt(text: string): string;
}