declare function exists(path: string): Promise<boolean>;
declare function readFile(path: string, encoding?: 'utf8' | 'base64'): Promise<string>;
declare function writeFile(path: string, content: string, encoding?: 'utf8' | 'base64'): Promise<void>;
declare function mkdir(path: string): Promise<void>;
declare function readDir(path: string): Promise<string[]>;
declare function unlink(path: string): Promise<void>;
declare function moveFile(src: string, dest: string): Promise<void>;
declare function unzip(zipPath: string, destPath: string): Promise<string[]>;
declare function downloadFile(url: string, destPath: string): Promise<void>;
declare function downloadFileBounded(url: string, destPath: string, maxBytes: number, timeoutMs: number): Promise<void>;
declare function sha256File(path: string): Promise<string>;
declare function sha256String(value: string): Promise<string>;
declare function verifyEs256Signature(signingInput: string, signatureBase64Url: string, xBase64Url: string, yBase64Url: string): Promise<boolean>;
declare function fileSize(path: string): Promise<number>;
declare function copyFile(src: string, dest: string): Promise<void>;
declare function applyXdelta(basePath: string, patchPath: string, outputPath: string): Promise<void>;
declare function verifyBundleFiles(bundleDir: string, manifestPath: string): Promise<{
    verified: true;
}>;
declare function supportsXdelta(): Promise<boolean>;
declare const BundleDropFS: {
    DocumentDirectoryPath: string;
    LibraryDirectoryPath: string;
    exists: typeof exists;
    readFile: typeof readFile;
    writeFile: typeof writeFile;
    mkdir: typeof mkdir;
    readDir: typeof readDir;
    unlink: typeof unlink;
    moveFile: typeof moveFile;
    unzip: typeof unzip;
    downloadFile: typeof downloadFile;
    downloadFileBounded: typeof downloadFileBounded;
    sha256File: typeof sha256File;
    sha256String: typeof sha256String;
    verifyEs256Signature: typeof verifyEs256Signature;
    fileSize: typeof fileSize;
    copyFile: typeof copyFile;
    applyXdelta: typeof applyXdelta;
    verifyBundleFiles: typeof verifyBundleFiles;
    supportsXdelta: typeof supportsXdelta;
};
export default BundleDropFS;