import { OcppRequest } from '@citrineos/base';
/**
 * Calculate the size of a request.
 *
 * @param {object} request - The ocpp request.
 * @return {number} The size of the request (Bytes).
 */
export declare function getSizeOfRequest(request: OcppRequest): number;
/**
 * Slice array into pieces according to the given size.
 *
 * @param {array} array - An array.
 * @param {number} size - The expected size of a batch.
 * @return {map} A map with index as key and batch as value. Index is the position of the 1st batch element in the given
 * array. Batch is a subarray of the given array.
 */
export declare function getBatches(array: object[] | string[] | boolean[] | number[], size: number): Map<number, object[] | string[] | boolean[] | number[]>;
/**
 * Get the number of fraction digits in a number, e.g, 1.23 -> 2
 *
 * @param num - The number to get the number of fraction digits
 * @returns The number of fraction digits
 */
export declare function getNumberOfFractionDigit(num: number): number;
/**
 * Convert string to set. For example, 'a,b,c' -> new Set(['a', 'b', 'c'])
 *
 * @param input - The string to convert
 * @returns Set
 */
export declare function stringToSet(input: string): Set<string>;