export declare class XChaCha20Poly1305 {
    static decrypt(options: {
        additionalData?: Uint8Array;
        data: Uint8Array;
        key: Uint8Array;
        nonce: Uint8Array;
        tag: Uint8Array;
    }): Promise<Uint8Array>;
    static encrypt(options: {
        additionalData?: Uint8Array;
        data: Uint8Array;
        key: Uint8Array;
        nonce: Uint8Array;
    }): Promise<{
        ciphertext: Uint8Array;
        tag: Uint8Array;
    }>;
    static generateKey(): Promise<Uint8Array>;
}
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