/**
 * Create message terminated (MT) parts to be sent to SMPPP linkers
 *
 * @param body message as string
 * @param opts optional options (unicode: boolean)
 * @returns {string[]} array of strings
 *
 * @example
 * createParts('Hello World') // ['Hello World']
 */
export declare function createParts(body: string, opts?: {
    unicode: boolean;
}): string[];
/**
 * Return the character length of given content
 *
 *
 * @see [String.length](https://mdn.io/Reference/Global_Objects/String/length)
 *
 * @example
 * characterCount('€') // 2 (GSM 03.38, 7bit)
 * characterCount('€', { unicode: true }) // 1 (UCS2,  unicode)
 *
 * @param content message content
 * @param opts.unicode boolean, if true, count as unicode instead of GSM 03.38
 * @param opts.unicode boolean, if true, count as unicode instead of GSM 03.38
 */
export declare function characterCount(content: string, opts?: {
    unicode: boolean;
}): number;
/**
 * Replace invalid unicode characters with sane equivalence or question mark (?)
 *
 * @example
 * // character with sane replacements
 * unicodeReplace('ýô') // 'yo'
 * // Invalid characters
 * unicodeReplace('A你Z') // 'A??Z'
 * // Valid characters
 * unicodeReplace('ΘΞÆæß') // 'ΘΞÆæß'
 *
 * @param content message content
 */
export declare function unicodeReplace(content: string): string;