export interface MetadataHandle<Metadata extends Record<string, any>, Content extends Record<string, any>> {
    readContent(): Promise<MetadataReadResult<Content>>;
    readMetaData(): Promise<MetadataReadResult<Metadata>>;
    close(): Promise<void>;
}
export declare enum MetadataReadErrorType {
    INVALID_METADATA_SIZE = "INVALID_METADATA_SIZE",
    INVALID_METADATA = "INVALID_METADATA",
    INVALID_CONTENT_SIZE = "INVALID_CONTENT_SIZE",
    INVALID_CONTENT = "INVALID_CONTENT"
}
export type MetadataReadResult<Content extends Record<string, any>> = {
    ok: true;
    content: Content;
    error: null;
    errorType: null;
} | {
    ok: false;
    content: null;
    error: Error;
    errorType: MetadataReadErrorType;
};
export declare class Metadata {
    static HEADER_SIZE: number;
    private static success;
    private static error;
    static read<Metadata extends Record<string, any>, Content extends Record<string, any>>(src: string): Promise<MetadataHandle<Metadata, Content>>;
    static write<Metadata extends Record<string, any>, Content extends Record<string, any>>(src: string, metadata: Metadata, content: Content): Promise<void>;
    private static readMetaData;
    private static readContent;
    private static getMetadataSize;
    private static writeData;
}