/**
 * Ids and text measures from Web Crypto and plain JavaScript, so the modules that use them run on
 * every runtime: Node.js, Deno, Bun, edge runtimes, and browsers.
 */
/** Random bytes as lowercase hex, two characters per byte. */
export declare function randomHex(bytes: number): string;
export declare function generateRequestId(): string;
/** The bytes UTF-8 takes for a string, as `Buffer.byteLength()` counts them, without encoding it. */
export declare function utf8Length(text: string): number;