/**
 * DError - Extended Error class with error codes and metadata
 *
 * Provides a custom error class that extends Error with:
 * - Error codes for categorization
 * - Error metadata for additional context
 * - Backward compatibility with standard Error
 */
export declare class DError extends Error {
    code: string;
    metadata?: Record<string, any>;
    timestamp: number;
    constructor(message: string, code?: string, metadata?: Record<string, any>);
    /**
     * Convert error to JSON for logging/serialization
     */
    toJSON(): {
        name: string;
        message: string;
        code: string;
        metadata: Record<string, any> | undefined;
        timestamp: number;
        stack: string | undefined;
    };
    /**
     * Convert error to string representation
     */
    toString(): string;
}
export declare namespace dassert {
    function verifyOrThrow(cond: boolean, msg: string, code?: string): void;
    function verifyNotNullAndEmpty(data: any, msg: string, code?: string): void;
    function verifyOrCrash(cond: boolean, msg?: string, code?: string): void;
    function assertNotEmpty(data: string, msg?: string, code?: string): void;
    function getOrThrow(cond: boolean, msg: string, code?: string): true;
    function verifyNotNullAndUndef(data: any, msg: string, code?: string): void;
    function verifyObject(data: any, msg: string, code?: string): void;
    function verifyArray(data: any, msg: string, code?: string): void;
    function verifyString(data: any, msg: string, code?: string): void;
    function verifyValidItem(item: string, arr: string[], code?: string): void;
}