import { ViesUserError } from './interfaces.js';
/**
 * Custom error class for VIES API errors
 *
 * @example
 * ```typescript
 * try {
 *   const result = await checkVAT('LU', '26375245');
 * } catch (error) {
 *   if (error instanceof ViesError) {
 *     console.log(error.code); // 'TIMEOUT', 'SERVICE_UNAVAILABLE', etc.
 *     if (error.isTransient()) {
 *       // Retry logic
 *     }
 *   }
 * }
 * ```
 */
export declare class ViesError extends Error {
    /**
     * The VIES error code
     */
    readonly code: ViesUserError;
    constructor(code: ViesUserError, message?: string);
    /**
     * Check if error represents a rate limit
     * @returns true if the error is a rate limit error
     */
    isRateLimitError(): boolean;
    /**
     * Check if error might be transient and worth retrying
     * @returns true if the error is likely temporary
     */
    isTransient(): boolean;
}