diff --git a/index.ts b/index.ts
index 303afff..343e316 100644
--- a/index.ts
+++ b/index.ts
@@ -41,42 +41,37 @@ const sleep = (msec: number) =>
 // #region misskey
 const me = await misskey.request("i", {});
 
+/** check if a note is suitable as an input */
 const isSuitableAsInput = (n: Note) =>
-  !n.user.isBot && !n.replyId && (!n.mentions || n.mentions.length === 0) && n.text?.length && n.text.length > 0
+  !n.user.isBot
+  && !n.replyId
+  && (!n.mentions || n.mentions.length === 0)
+  && n.text?.length && n.text.length > 0
 
 /** randomly sample some notes from the timeline */
 async function getNotes() {
+
   // randomly sample N local notes
-  async function getLocalNotes(count: number) {
-    const timeline = await misskey.request("notes/local-timeline", {
-      limit: 100,
-    });
-    // exclude bot notes
-    return sample(timeline.filter(isSuitableAsInput), count);
-  }
+  const localNotes = (count: number) =>
+    misskey.request("notes/local-timeline", { limit: 100 })
+      .then((xs) => xs.filter(isSuitableAsInput))
+      .then((xs) => sample(xs, count));
 
   // randomly sample N global notes
-  async function getGlobalNotes(count: number) {
-    const timeline = await misskey.request("notes/global-timeline", {
-      limit: 100,
-    });
-    // exclude bot notes and replies
-    return sample(timeline.filter(isSuitableAsInput), count);
-  }
+  const globalNotes = (count: number) =>
+    misskey.request("notes/global-timeline", { limit: 100 })
+      .then((xs) => xs.filter(isSuitableAsInput))
+      .then((xs) => sample(xs, count));
 
   // randomly sample N notes of mine
-  async function getMyNotes(count: number) {
-    const notes = await misskey.request("users/notes", {
-      userId: me.id,
-      limit: 100,
-    });
-    return sample(notes, count);
-  }
+  const myNotes = (count: number) =>
+    misskey.request("users/notes", { userId: me.id, limit: 100 })
+      .then((xs) => sample(xs, count));
 
   const notes = await Promise.all([
-    getLocalNotes(5),
-    getGlobalNotes(10),
-    getMyNotes(2),
+    localNotes(5),
+    globalNotes(10),
+    myNotes(2),
   ]);
   return sample(notes.flat());
 }