try to implement it using a new backend, still not working

.gitignore

@@ -133,3 +133,5 @@ dist
 # Files with sensitive login data
 config.json
 token.txt
+storage.json
+crypto

index.js

@@ -0,0 +1,64 @@
+// Matrix Bot by Hammer1279
+// Matrix: @hammer1279:ht-dev.de | #general:ht-dev.de
+// https://matrix.to/#/@hammer1279:ht-dev.de
+// https://matrix.to/#/#general:ht-dev.de
+
+import { MatrixAuth, MatrixClient, SimpleFsStorageProvider, AutojoinRoomsMixin, AutojoinUpgradedRoomsMixin, RustSdkCryptoStorageProvider } from "matrix-bot-sdk";
+import { existsSync } from "node:fs";
+import { writeFile, readFile, appendFile } from "node:fs/promises";
+import { inspect } from "node:util";
+
+import config from "./config.json" with {
+    type: "json"
+}
+
+const { homeserver, deviceId, userId, password, registerToken, leaveOnStart } = config;
+
+let token;
+
+if (!existsSync("./token.txt")) {
+    // This will be the URL where clients can reach your homeserver. Note that this might be different
+    // from where the web/chat interface is hosted. The server must support password registration without
+    // captcha or terms of service (public servers typically won't work).
+    const auth = new MatrixAuth(homeserver);
+    const loginClient = await auth.passwordLogin(userId.replace('@','').replace(/:.*/,''), password, deviceId);
+    await writeFile("./token.txt", loginClient.accessToken);
+    token = loginClient.accessToken;
+} else {
+    token = (await readFile("./token.txt")).toString();
+}
+
+// In order to make sure the bot doesn't lose its state between restarts, we'll give it a place to cache
+// any information it needs to. You can implement your own storage provider if you like, but a JSON file
+// will work fine for this example.
+const storageProvider = new SimpleFsStorageProvider("storage.json");
+const cryptoProvider = new RustSdkCryptoStorageProvider("./crypto");
+
+// Finally, let's create the client and set it to autojoin rooms. Autojoining is typical of bots to ensure
+// they can be easily added to any room.
+const client = new MatrixClient(homeserver, token, storageProvider, cryptoProvider);
+AutojoinRoomsMixin.setupOnClient(client);
+AutojoinUpgradedRoomsMixin.setupOnClient(client);
+
+
+// Before we start the bot, register our command handler
+client.on("room.message", handleCommand);
+
+// Now that everything is set up, start the bot. This will start the sync loop and run until killed.
+client.start().then(() => console.log("Bot started!"));
+
+// This is the command handler we registered a few lines up
+async function handleCommand(roomId, event) {
+    // Don't handle unhelpful events (ones that aren't text messages, are redacted, or sent by us)
+    if (event['content']?.['msgtype'] !== 'm.text') return;
+    if (event['sender'] === await client.getUserId()) return;
+    
+    // Check to ensure that the `!hello` command is being run
+    const body = event['content']['body'];
+    if (!body?.startsWith("!hello")) return;
+    
+    // Now that we've passed all the checks, we can actually act upon the command
+    // await client.replyNotice(roomId, event, "Hello world!");
+    await client.sendText(roomId, "Hewwo :3");
+    console.log(inspect(event, false, null, true));
+}