export interface ConfigurationOptions { apiEndpoint?: string; timeout?: number; retryAttempts?: number; enableLogging?: boolean; encryptionEnabled?: boolean; } export declare class ConfigurationService { private static instance; private config; private constructor(); static getInstance(): ConfigurationService; updateConfig(options: ConfigurationOptions): void; getConfig(): Required; get apiEndpoint(): string; get timeout(): number; get retryAttempts(): number; get enableLogging(): boolean; get encryptionEnabled(): boolean; }