/**
 * Validate that the passed UUID is an RFC4122 v5 UUID.
 *
 * ```ts
 * import { generate as generateV5, validate } from "./v5.ts";
 *
 * validate(await generateV5("6ba7b810-9dad-11d1-80b4-00c04fd430c8", new Uint8Array())); // true
 * validate(crypto.randomUUID()); // false
 * validate("this-is-not-a-uuid"); // false
 * ```
 */
export declare function validate(id: string): boolean;
/**
 * Generate a RFC4122 v5 UUID (SHA-1 namespace).
 *
 * ```js
 * import { generate } from "./v5.ts";
 *
 * const NAMESPACE_URL = "6ba7b810-9dad-11d1-80b4-00c04fd430c8";
 *
 * const uuid = await generate(NAMESPACE_URL, new TextEncoder().encode("python.org"));
 * uuid === "886313e1-3b8a-5372-9b90-0c9aee199e5d" // true
 * ```
 *
 * @param namespace The namespace to use, encoded as a UUID.
 * @param data The data to hash to calculate the SHA-1 digest for the UUID.
 */
export declare function generate(namespace: string, data: Uint8Array): Promise<string>;