/**
 * Represents a custom application error with additional metadata.
 *
 * Extends the native `Error` class to include HTTP status codes, operational flags,
 * optional error codes, and additional details for enhanced error handling.
 *
 * @example
 * ```typescript
 * throw new AppError('Resource not found', 404, 'NOT_FOUND');
 * ```
 *
 * @remarks
 * Use this class to throw errors that should be handled gracefully by the application.
 *
 * @property statusCode - The HTTP status code associated with the error.
 * @property isOperational - Indicates if the error is operational (expected) or a programming error.
 * @property errorCode - An optional application-specific error code.
 * @property details - Optional additional information about the error.
 *
 * @param message - The error message.
 * @param statusCode - The HTTP status code (default: 500).
 * @param errorCode - An optional application-specific error code.
 * @param isOperational - Whether the error is operational (default: true).
 * @param details - Optional additional error details.
 */
export declare class AppError extends Error {
    readonly statusCode: number;
    readonly isOperational: boolean;
    readonly errorCode?: string;
    readonly details?: any;
    constructor(message: string, statusCode?: number, errorCode?: string, isOperational?: boolean, details?: any);
}
export declare class AuthenticationError extends AppError {
    constructor(message?: string);
}
export declare class AuthorizationError extends AppError {
    constructor(message?: string);
}
export declare class NotFoundError extends AppError {
    constructor(resource?: string);
}
export declare class ConflictError extends AppError {
    constructor(message: string);
}
export declare class RateLimitError extends AppError {
    constructor(message?: string);
}
export declare class InternalServerError extends AppError {
    constructor(message?: string, details?: any);
}
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