export declare class Checksum {
    private filePath?;
    private file;
    constructor(filePath?: string);
    createChecksumWithFileUrl(): Promise<string>;
    checkChecksum(checksum: string): Promise<boolean>;
    createChecksumWithData(data: string): Promise<string>;
    checkChecksumWithData(sourceData: string, destinationData: string): Promise<boolean>;
}