refactor: workspace provider (#2218)

packages/y-indexeddb/src/__tests__/index.spec.ts

@@ -340,7 +340,10 @@ describe('utils', () => {
     provider.connect();
     await provider.whenSynced;
     provider.disconnect();
-    const update = await downloadBinary(workspace.id, rootDBName);
+    const update = (await downloadBinary(
+      workspace.id,
+      rootDBName
+    )) as Uint8Array;
     expect(update).toBeInstanceOf(Uint8Array);
     const newWorkspace = new Workspace({
       id,

packages/y-indexeddb/src/utils.ts

@@ -129,7 +129,7 @@ export async function tryMigrate(
 export async function downloadBinary(
   id: string,
   dbName = DEFAULT_DB_NAME
-): Promise<UpdateMessage['update']> {
+): Promise<UpdateMessage['update'] | false> {
   const dbPromise = openDB<BlockSuiteBinaryDB>(dbName, dbVersion, {
     upgrade: upgradeDB,
   });
@@ -137,7 +137,7 @@ export async function downloadBinary(
   const t = db.transaction('workspace', 'readonly').objectStore('workspace');
   const doc = await t.get(id);
   if (!doc) {
-    return new Uint8Array(0);
+    return false;
   } else {
     return mergeUpdates(doc.updates.map(({ update }) => update));
   }