diff --git a/src/channelManager.js b/src/channelManager.js
deleted file mode 100644
index a18b1e9..0000000
--- a/src/channelManager.js
+++ /dev/null
@@ -1,127 +0,0 @@
-var Events = require('events');
-
-class User {
-  constructor(pubkey, username) {
-    this.pubkey = pubkey;
-    this.username = username;
-    this.online = false;
-    this.lastSeen = 0;
-  }
-}
-
-class Users {
-  constructor() {
-    this.users = {};
-  }
-
-  addUserOrUpdate(user) {
-    this.users[user.pubkey] = user;
-  }
-
-  addOrUpdateUserKey(pubkey, username) {
-    if (!this.users[pubkey]) {
-      this.users[pubkey] = new User(pubkey, username);
-    }
-    this.users[pubkey].lastSeen = (new Date().getTime());
-    this.users[pubkey].online = true;
-    return this.users[pubkey];
-  }
-
-  getUsers() {
-    let userList = [];
-    for (let pubkey in this.users) {
-      userList.push(pubkey);
-    }
-    return userList;
-  }
-
-  updateUsersState() {
-    let currentTime = (new Date().getTime());
-    for (let pubkey in this.users) {
-      let user = this.users[pubkey];
-      if (currentTime - user.lastSeen > 10*1000) {
-        user.online = false;
-      }
-    }
-  }
-
-}
-
-class ChannelManager {
-  constructor() {
-    this.channels = [];
-    this.events = new Events();
-    this.currentChannel = 0;
-    this.allUsers = new Users();
-  }
-
-  addChannel(channelName, type, extraData) {
-    if(this.getChannel(channelName)) return;
-
-    let channel = {name: channelName, pendingMessages: [], type, ...extraData};
-    channel.users = new Users();
-    this.channels.push(channel);
-    this.events.emit("update");
-  }
-
-  getChannel(channelName) {
-    return this.channels.find(c => c.name === channelName);
-  }
-
-  getCurrentChannel() {
-    return this.channels[this.currentChannel];
-  }
-
-  addMessage(channelName, message, pubkey, username) {
-    let channel = this.getChannel(channelName);
-    if (channelName !== this.channels[this.currentChannel].name) {
-      channel.pendingMessages.push({pubkey, username, message});
-    } else {
-      this.events.emit("newMessage", channelName, username, message);
-    }
-    let user = this.allUsers.addOrUpdateUserKey(pubkey, username);
-    channel.users.addUserOrUpdate(user);
-
-    this.events.emit("update");
-  }
-
-  dumpPendingMessages() {
-    let messages = this.channels[this.currentChannel].pendingMessages.slice(0);
-    this.channels[this.currentChannel].pendingMessages = [];
-    return messages;
-  }
-
-  switchChannelIndex(index) {
-    if (index < 0) return;
-    if (index >= this.channels.length) return;
-    this.currentChannel = index;
-    this.events.emit("update");
-    this.events.emit("channelSwitch");
-  }
-
-  getChannelList() {
-    return this.channels.map((c) => {
-
-      const prefix = c.type === 'channel' ? '#' : '';
-
-      if (c.name === this.channels[this.currentChannel].name) {
-        return `${prefix}${c.name}`.green;
-      }
-      if (c.pendingMessages.length === 0) {
-        return `${prefix}${c.name}`;
-      }
-      return `${prefix}${c.name} (${c.pendingMessages.length})`;
-    });
-  }
-
-  getUsersInCurrentChannel() {
-    let channel = this.getCurrentChannel();
-    let user_keys = channel.users.getUsers();
-    let users = user_keys.map((pubkey) => {
-      return this.allUsers.users[pubkey];
-    });
-    return users;
-  }
-}
-
-module.exports = ChannelManager;
diff --git a/src/channelManager.ts b/src/channelManager.ts
new file mode 100644
index 0000000..6802acf
--- /dev/null
+++ b/src/channelManager.ts
@@ -0,0 +1,92 @@
+const Events = require("events");
+import Users from "./users";
+import colors from "colors";
+
+class ChannelManager {
+  private channels: any[];
+  private events: any;
+  private currentChannel: number;
+  private allUsers: Users;
+
+  constructor() {
+    this.channels = [];
+    this.events = new Events();
+    this.currentChannel = 0;
+    this.allUsers = new Users();
+  }
+
+  public addChannel(channelName: string, type: string, extraData?: any) {
+    if (this.getChannel(channelName)) {
+      return;
+    }
+
+    const channel = {name: channelName, pendingMessages: [], type, ...extraData};
+    channel.users = new Users();
+    this.channels.push(channel);
+    this.events.emit("update");
+  }
+
+  public getChannel(channelName: string) {
+    return this.channels.find((c) => c.name === channelName);
+  }
+
+  public getCurrentChannel() {
+    return this.channels[this.currentChannel];
+  }
+
+  public addMessage(channelName: string, message: string, pubkey: string, username: string) {
+    const channel = this.getChannel(channelName);
+    if (channelName !== this.channels[this.currentChannel].name) {
+      channel.pendingMessages.push({pubkey, username, message});
+    } else {
+      this.events.emit("newMessage", channelName, username, message);
+    }
+    const user = this.allUsers.addOrUpdateUserKey(pubkey, username);
+    channel.users.addUserOrUpdate(user);
+
+    this.events.emit("update");
+  }
+
+  public dumpPendingMessages() {
+    const messages = this.channels[this.currentChannel].pendingMessages.slice(0);
+    this.channels[this.currentChannel].pendingMessages = [];
+    return messages;
+  }
+
+  public switchChannelIndex(index: number) {
+    if (index < 0) {
+      return;
+    }
+    if (index >= this.channels.length) {
+      return;
+    }
+    this.currentChannel = index;
+    this.events.emit("update");
+    this.events.emit("channelSwitch");
+  }
+
+  public getChannelList() {
+    return this.channels.map((c) => {
+      const prefix = c.type === "channel" ? "#" : "";
+
+      if (c.name === this.channels[this.currentChannel].name) {
+        return colors.green(`${prefix}${c.name}`);
+      }
+      if (c.pendingMessages.length === 0) {
+        return `${prefix}${c.name}`;
+      }
+      return `${prefix}${c.name} (${c.pendingMessages.length})`;
+    });
+  }
+
+  public getUsersInCurrentChannel() {
+    const channel = this.getCurrentChannel();
+    const userKeys = channel.users.getUsers();
+    const users = userKeys.map((pubkey: string) => {
+      return this.allUsers.users[pubkey];
+    });
+    return users;
+  }
+}
+
+module.exports = ChannelManager;
diff --git a/src/user.ts b/src/user.ts
new file mode 100644
index 0000000..e9084ea
--- /dev/null
+++ b/src/user.ts
@@ -0,0 +1,16 @@
+
+class User {
+  public pubkey: string;
+  public username: string;
+  public online: boolean;
+  public lastSeen: number;
+
+  constructor(pubkey: string, username: string) {
+    this.pubkey = pubkey;
+    this.username = username;
+    this.online = false;
+    this.lastSeen = 0;
+  }
+}
+
+export default User;
diff --git a/src/users.ts b/src/users.ts
new file mode 100644
index 0000000..6816220
--- /dev/null
+++ b/src/users.ts
@@ -0,0 +1,43 @@
+import User from "./user";
+
+class Users {
+  public users: any;
+
+  constructor() {
+    this.users = {};
+  }
+
+  public addUserOrUpdate(user: User) {
+    this.users[user.pubkey] = user;
+  }
+
+  public addOrUpdateUserKey(pubkey: string, username: string) {
+    if (!this.users[pubkey]) {
+      this.users[pubkey] = new User(pubkey, username);
+    }
+    this.users[pubkey].lastSeen = (new Date().getTime());
+    this.users[pubkey].online = true;
+    return this.users[pubkey];
+  }
+
+  public getUsers() {
+    const userList = [];
+    for (const pubkey of Object.keys(this.users)) {
+      userList.push(pubkey);
+    }
+    return userList;
+  }
+
+  public updateUsersState() {
+    const currentTime = (new Date().getTime());
+    for (const pubkey of Object.keys(this.users)) {
+      const user = this.users[pubkey];
+      if (currentTime - user.lastSeen > 10 * 1000) {
+        user.online = false;
+      }
+    }
+  }
+
+}
+
+export default Users;