export declare function safeHook<I, O>(fn: (input: I, output: O) => Promise<void>): (input: I, output: O) => Promise<void>;
export declare function composeHandlers<I, O>(...fns: Array<(input: I, output: O) => Promise<void>>): (input: I, output: O) => Promise<void>;
declare function isFileValidationEnabled(): boolean;
declare function getMaxFileBytes(): number;
declare function getMaxScanDepth(): number;
export declare function validateWriterPath(directory: string, filename: string): Promise<string>;
export declare function validateSwarmPath(directory: string, filename: string): Promise<string>;
export declare function checkFileSizeLimit(filePath: string): Promise<void>;
export declare function checkDirectoryDepth(currentDepth: number): void;
export declare function isSymlink(filePath: string): Promise<boolean>;
export { getMaxFileBytes, getMaxScanDepth, isFileValidationEnabled };
export declare function readWriterFileAsync(directory: string, filename: string): Promise<string | null>;
export declare function readSwarmFileAsync(directory: string, filename: string): Promise<string | null>;