export declare function measureBytes(str: string): number;
/**
 * Chunks a string into an array of strings, each of the specified byte size.
 * @param str - The string to chunk.
 * @param byteSize - The byte size of each chunk. i.e. 10KB = 50 * 1000
 * @returns An array of strings, each of the specified byte size.
 */
export declare function chunkToBytes(str: string, byteSize: number): string[];
/**
 * Truncates a string to the specified byte length.
 * @param str - The string to truncate.
 * @param byteSize - The byte size of the truncated string. i.e. 10KB = 50 * 1000
 * @returns The truncated string.
 */
export declare function truncateToBytes(str: string, byteSize: number): string;
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