/// <reference types="node" resolution-mode="require"/>
/**
 * Resolve a promise with timeout
 * @param timeoutMs - Timeout in milliseconds
 * @param promise - Promise to be resolved or a function that returns a promise
 * @param failureMessage - Custom error message for timeout
 */
export declare function resolvePromiseWithTimeout<T>(promise: Promise<T> | (() => Promise<T>), timeoutMs?: number, failureMessage?: string): Promise<T>;
/**
 * Sleep function
 */
export declare const sleep: typeof import("timers/promises").setTimeout;
/**
 * Exponential backoff strategy for retries
 * @param base - Base wait time in milliseconds
 */
export declare function exponentialBackoff(base: number): (retries: number) => number;
/**
 * Options for retry
 */
export type RetryOptions<T = unknown> = {
    shouldRetry?: (err?: any, data?: T) => boolean;
    waitInMs?: number | ((retries: number) => number);
    maxRetries?: number;
};
/**
 * Run a task with retry it if fails
 * @param fn - Task function
 * @param options - Retry options
 */
export declare function retryWithBackoff<T>(fn: () => Promise<T>, options?: RetryOptions<T>): Promise<T>;