/**
 * Timeout Utilities
 *
 * Wrapper functions for adding timeout protection to async operations.
 */
/**
 * Error thrown when an operation times out.
 */
export declare class TimeoutError extends Error {
    readonly timeoutMs: number;
    /**
     * Creates a new TimeoutError.
     *
     * @param message - Error message describing the timeout
     * @param timeoutMs - The timeout duration that was exceeded
     */
    constructor(message: string, timeoutMs: number);
}
/**
 * Execute a promise with timeout protection.
 *
 * Wraps a promise and rejects with a TimeoutError if the operation
 * takes longer than the specified duration.
 *
 * @param promise - The promise to wrap with timeout
 * @param ms - Maximum time to wait in milliseconds
 * @param message - Optional custom error message for timeout
 * @returns Promise that resolves with the result or rejects on timeout
 * @throws {TimeoutError} If the operation exceeds the timeout duration
 *
 * @example
 * ```typescript
 * const result = await withTimeout(
 *   fetchData(),
 *   5000,
 *   'Data fetch timed out'
 * );
 * ```
 *
 * @example
 * ```typescript
 * try {
 *   const data = await withTimeout(slowOperation(), 3000);
 * } catch (error) {
 *   if (error instanceof TimeoutError) {
 *     console.log(`Timed out after ${error.timeoutMs}ms`);
 *   }
 * }
 * ```
 */
export declare function withTimeout<T>(promise: Promise<T>, ms: number, message?: string): Promise<T>;
/**
 * Execute a function with timeout protection.
 *
 * Alternative signature that accepts a function instead of a promise,
 * useful when you want to delay starting the operation.
 *
 * @param fn - Async function to execute
 * @param ms - Maximum time to wait in milliseconds
 * @param message - Optional custom error message for timeout
 * @returns Promise that resolves with the function result or rejects on timeout
 * @throws {TimeoutError} If the operation exceeds the timeout duration
 *
 * @example
 * ```typescript
 * const result = await withTimeoutFn(
 *   () => fetchData(),
 *   5000,
 *   'Data fetch timed out'
 * );
 * ```
 */
export declare function withTimeoutFn<T>(fn: () => Promise<T>, ms: number, message?: string): Promise<T>;