/**
 * Key generator utility for generating unique identifiers
 * Used for fields 1004, 1103, and 1153 which require randomly generated unique IDs
 */
/**
 * Generates a random numeric string of specified length
 * @param length - The length of the numeric string to generate (max 15 digits)
 * @returns A random numeric string padded with leading zeros if necessary
 */
export declare function generateRandomKey(length?: number): string;
/**
 * Generates a primary identifier for fields 1004, 1103, and 1153
 * These fields must have the same value across all records in a single file
 * @returns A 15-digit numeric string
 */
export declare function generatePrimaryIdentifier(): string;
/**
 * Key generator context to maintain consistent IDs across records
 * This ensures that fields 1004, 1103, and 1153 use the same value within a single file
 */
export declare class KeyGeneratorContext {
    private _primaryIdentifier;
    /**
     * Gets or generates the primary identifier for this context
     * Ensures the same ID is used across all records that require it
     */
    getPrimaryIdentifier(): string;
    /**
     * Resets the context, generating new IDs for the next file
     */
    reset(): void;
    /**
     * Sets a specific primary identifier (useful for testing or when you have a specific ID requirement)
     */
    setPrimaryIdentifier(id: string): void;
}
/**
 * Default key generator context instance
 * Use this for most cases to ensure consistency across records
 */
export declare const defaultKeyGenerator: KeyGeneratorContext;