import { Payload, PayloadCodec } from "./security";
export declare class LargePayloadCodec implements PayloadCodec {
    private codecServerUrl;
    private namespace;
    constructor(codecServerUrl: string, namespace: string);
    private calculateDigest;
    private convertMetadataToBase64;
    private serializeMetadata;
    encode(payloads: Payload[]): Promise<Payload[]>;
    decode(payloads: Payload[]): Promise<Payload[]>;
}