export interface RetryConfig {
    /** Maximum number of retry attempts. Default: 3 */
    maxRetries: number;
    /** Initial delay in milliseconds before the first retry. Default: 500 */
    initialDelayMs: number;
    /** Maximum delay in milliseconds between retries. Default: 30000 */
    maxDelayMs: number;
    /** Multiplier applied to the delay after each retry. Default: 2.0 */
    backoffMultiplier: number;
    /** HTTP status codes that should trigger a retry. Default: [408, 429, 500, 502, 503, 504] */
    retryableStatusCodes: number[];
}
export declare const DEFAULT_RETRY_CONFIG: RetryConfig;
/**
 * Executes `fn` with automatic retry and exponential backoff.
 *
 * On failure the function inspects the thrown error:
 * - If it is a `KeelError` whose status is listed in `config.retryableStatusCodes`,
 *   the call is retried after an exponentially increasing delay (with jitter).
 * - If the error carries a `retryAfter` value (seconds), that value is used as the
 *   minimum delay for the next attempt.
 * - Non-retryable errors are re-thrown immediately.
 * - After `config.maxRetries` failed attempts the last error is thrown.
 */
export declare function retryWithBackoff<T>(fn: () => Promise<T>, config: RetryConfig): Promise<T>;