/**
 * Fetch IMO numbers for a specific company from MongoDB
 * @param companyName The name of the company to fetch IMO numbers for
 * @returns Array of IMO numbers as strings
 */
export declare function fetchCompanyImoNumbers(companyName: string, dbName: string, mongoUri: string, collectionName?: string): Promise<string[]>;
/**
 * Check if IMO filtering should be bypassed for admin companies
 * @param companyName - Name of the company to check
 * @returns True if filtering should be bypassed
 */
export declare function shouldBypassImoFiltering(companyName: string): boolean;
/**
 * Validate if an IMO number is valid for the current company
 * @param imoNumber - IMO number to validate (string or number)
 * @param companyName - Company name to fetch IMO numbers for
 * @returns Promise that resolves to boolean indicating if IMO is valid
 */
export declare function isValidImoForCompany(imoNumber: string | number, companyName: string, dbName?: string, mongoUri?: string): Promise<boolean>;
/**
 * Initialize IMO cache for a company
 * @param companyName - Name of the company to initialize cache for
 */
export declare function initializeImoCache(companyName: string, dbName?: string, mongoUri?: string): Promise<void>;
/**
 * Load cached IMO numbers from file
 */
export declare function loadCachedImos(): string[];
/**
 * Save IMO numbers to cache file
 */
export declare function saveCachedImos(imos: string[], companyName: string): void;
/**
 * Check if company should skip IMO validation (e.g., for development/testing)
 */
export declare function shouldSkipImoValidation(companyName: string): boolean;
/**
 * Get company IMOs with intelligent fallback strategy
 */
export declare function getCompanyImosWithFallback(): string[];
/**
 * Clear all cached data (for testing/reset purposes)
 */
export declare function clearCache(): void;