export interface RetryOptions {
    retryCount?: number;
    retryDelay?: number;
}
/**
 * Error type thrown by transports when the server explicitly rate-limits
 * the caller (HTTP 429 or a JSON-RPC error frame with code=429). Carries
 * the server's retry hint in milliseconds so `withRetry` can wait the
 * suggested amount instead of using exponential backoff.
 *
 * Sources of the hint (both honored by `withRetry`):
 *   - HTTP: `retry-after-ms` header (priority) or `Retry-After` (sec→ms).
 *     The ms variant carries sub-second precision where `Retry-After`
 *     would round to 0 or 1.
 *   - JSON-RPC error frame: `error.data.retry_after_ms`.
 */
export declare class RateLimitError extends Error {
    readonly retryAfterMs: number;
    readonly cause?: unknown;
    constructor(message: string, retryAfterMs: number, cause?: unknown);
}
/**
 * Execute an async function with retry. Exponential backoff by default;
 * if the thrown error is a `RateLimitError`, the server-supplied hint
 * replaces the backoff for that attempt (capped at MAX_RATE_LIMIT_DELAY_MS).
 */
export declare function withRetry<T>(fn: () => Promise<T>, options?: RetryOptions): Promise<T>;
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