/**
 * Retry configuration
 */
export interface RetryConfig {
    maxRetries?: number;
    retryDelay?: number;
    retryDelayMultiplier?: number;
    maxRetryDelay?: number;
    retryableStatusCodes?: number[];
    onRetry?: (error: Error, attempt: number, delay: number) => void;
}
/**
 * Error with retry information
 */
export declare class RetryableError extends Error {
    statusCode?: number | undefined;
    attempt?: number | undefined;
    constructor(message: string, statusCode?: number | undefined, attempt?: number | undefined);
}
/**
 * Retry utility with exponential backoff
 */
export declare class RetryHandler {
    private logger;
    constructor();
    /**
     * Execute function with retry logic
     */
    executeWithRetry<T>(fn: () => Promise<T>, config?: RetryConfig, signal?: AbortSignal): Promise<T>;
    /**
     * Check if error is retryable
     */
    private isRetryable;
    /**
     * Calculate delay with exponential backoff
     */
    private calculateDelay;
    /**
     * Sleep with cancellation support
     */
    private sleep;
}
/**
 * Create an AbortController with timeout
 */
export declare function createTimeoutSignal(timeoutMs: number): AbortController;
/**
 * Combine multiple abort signals
 */
export declare function combineSignals(...signals: (AbortSignal | undefined)[]): AbortSignal;
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