/**
 * Retry utility with exponential backoff and jitter.
 *
 * Parameters:
 * - Initial delay: 1000ms
 * - Max delay: 30000ms
 * - Max attempts: 3
 * - Jitter: ±20%
 *
 * Formula: delay = min(maxDelay, initialDelay * 2^attempt) * (0.8 + random() * 0.4)
 */
import type { RetryConfig } from '../config/types.js';
export interface RetryOptions extends RetryConfig {
    shouldRetry?: (error: unknown) => boolean;
    onRetry?: (error: unknown, attempt: number, delayMs: number) => void;
}
/**
 * Calculate delay with exponential backoff and jitter.
 */
export declare function calculateDelay(attempt: number, initialDelayMs: number, maxDelayMs: number): number;
/**
 * Sleep for a specified duration.
 */
export declare function sleep(ms: number): Promise<void>;
/**
 * Execute a function with retry logic.
 */
export declare function withRetry<T>(fn: () => Promise<T>, options?: Partial<RetryOptions>): Promise<T>;
/**
 * Create a retry wrapper with pre-configured options.
 */
export declare function createRetryWrapper(config: RetryConfig): <T>(fn: () => Promise<T>) => Promise<T>;
/**
 * Check if an error is retryable based on HTTP/gRPC status codes.
 */
export declare function isRetryableStatusCode(statusCode: number): boolean;
/**
 * Enhanced retry check that considers both CloudBuildError and status codes.
 */
export declare function shouldRetryError(error: unknown): boolean;
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