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import type * as kv from '../kv/mod';import {uuid as makeUuid} from '../uuid';import {assertString} from '../asserts';
// TODO: Make ClientID an opaque typeexport type ClientID = string;export const CID_KEY = 'sys/cid';
export async function init(store: kv.Store): Promise<ClientID> {  const cid = await store.withRead(r => r.get(CID_KEY));  if (cid !== undefined) {    assertString(cid);    return cid;  }  const uuid = makeUuid();  await writeClientID(store, uuid);  return uuid;}
function writeClientID(s: kv.Store, uuid: ClientID): Promise<void> {  return s.withWrite(async wt => {    await wt.put(CID_KEY, uuid);    await wt.commit();  });}