export declare const SYMMETRIC_KEY_SIZE = 32;
export declare class Metadata {
    private _uid;
    private _headerMetadata?;
    get uid(): Uint8Array | undefined;
    set uid(value: Uint8Array | undefined);
    get headerMetadata(): Uint8Array | undefined;
    set headerMetadata(value: Uint8Array | undefined);
    constructor(uid?: Uint8Array, headerMetadata?: Uint8Array);
    /**
     * This function convert Metadata to JSON Metadata and returns the corresponding bytes
     * @returns {Uint8Array} a byte array of the JSON encoding Metadata
     */
    toJsonEncoded(): Uint8Array;
}
//# sourceMappingURL=encryption_parameters.d.ts.map