/**
 * Standard error response interface for API errors
 */
export interface ErrorResponse {
    statusCode: number;
    errors: string[];
    message: string;
}
/**
 * Alternative error response format
 */
export interface ErrorResponseObject {
    error: string;
    message: string;
}
/**
 * Type guard to check if an error is an ErrorResponse
 *
 * @param error - Unknown error object
 * @returns True if error is an ErrorResponse
 */
export declare function isApiErrorResponse(error: unknown): error is ErrorResponse;
/**
 * Type guard to check if an error is an object with a statusCode property
 * @param error
 */
export declare function isStatusCodeError(error: unknown): error is {
    statusCode: number;
};
/**
 * Type guard to check if an error is an ErrorResponseObject
 *
 * @param error - Unknown error object
 * @returns True if error is an ErrorResponseObject
 */
export declare function isErrorResponseObject(error: unknown): error is ErrorResponseObject;
/**
 * Type guard to check if an error is an ApiError
 * @param error - Unknown error object
 */
export declare function isApiError(error: unknown): error is ApiError;
/**
 * Extracts a user-friendly error message from an API error.
 *
 * This function handles various error formats and provides consistent,
 * user-friendly error messages based on HTTP status codes.
 *
 * @param error - The error to extract a message from
 * @returns User-friendly error message
 */
export declare function getApiErrorMessage(error: unknown): string;
/**
 * Custom error class with additional context
 *
 * @example
 * ```typescript
 * throw new ApiError("Failed to save record", 500, "abc123")
 * ```
 */
export declare class ApiError extends Error {
    statusCode: number;
    context: any;
    constructor(message: string, statusCode?: number, context?: any);
}
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