/**
 * Utilities for SDK Development
 * This file contains common utilities for input validation,
 * date/time formatting, string manipulation and more
 */
/**
 * Input Validation Utility
 */
export declare class Validator {
    /**
     * Validates that a required field is present and non-empty.
     * @param value - The value to validate.
     * @param fieldName - The name of the field for error messages.
     */
    static validateRequired(value: unknown, fieldName: string): void;
    /**
     * Validates that a value is a positive number.
     * @param value - The value to validate.
     * @param fieldName - The name of the field for error messages.
     */
    static validatePositiveNumber(value: unknown, fieldName: string): void;
    /**
     * Validates that a URL is properly formatted.
     * @param url - The URL to validate.
     * @param fieldName - The name of the field for error messages.
     */
    static validateURL(url: string, fieldName: string): void;
}
/**
 * Date/Time Utility
 */
export declare class DateTimeUtil {
    /**
     * Formats a Date object into the required API format (YYYYMMDDHHmmss).
     * @param date - The date to format.
     * @returns The formatted date string.
     */
    static formatToApiTimestamp(date: Date): string;
    /**
     * Calculates the expiration time given a number of seconds.
     * @param expiresInSeconds - The expiration duration in seconds.
     * @returns The expiration timestamp as a Date object.
     */
    static calculateExpiryTime(expiresInSeconds: number): Date;
}
/**
 * String Utility
 */
export declare class StringUtil {
    /**
     * Encodes a string to Base64.
     * @param value - The string to encode.
     * @returns The Base64-encoded string.
     */
    static toBase64(value: string): string;
    /**
     * Truncates a string to the specified length, adding "..." if truncated.
     * @param value - The string to truncate.
     * @param maxLength - The maximum allowed length.
     * @returns The truncated string.
     */
    static truncate(value: string, maxLength: number): string;
}
/**
 * Exponential Backoff Utility
 */
export declare class RetryUtil {
    /**
     * Calculates the delay for a retry attempt using exponential backoff.
     * @param attempt - The current retry attempt (0-indexed).
     * @param baseDelay - The base delay in milliseconds (default: 100ms).
     * @returns The calculated delay in milliseconds.
     */
    static calculateBackoffDelay(attempt: number, baseDelay?: number): number;
}
export declare const Utils: {
    Validator: typeof Validator;
    DateTimeUtil: typeof DateTimeUtil;
    StringUtil: typeof StringUtil;
    RetryUtil: typeof RetryUtil;
};