export interface RetryOptions {
    retries?: number;
    delay?: number;
    backoff?: number;
    onRetry?: (error: Error, attempt: number) => void;
}
export declare function retry<T>(fn: () => Promise<T>, options?: RetryOptions): Promise<T>;
export declare function withTimeout<T>(promise: Promise<T>, timeout?: number, errorMessage?: string): Promise<T>;