I have implemented a super lightweight MTProto library in JS. It's optimized for the web and the MTProto part itself is ~150KB minified and less than 50KB gzipped. My code converts tl schema to typescript definitions which makes it super easy to develop apps and all serialization/deserialization is done in runtime based on an array generated from the schema.

Features:
- Full implementation of the monkey animation
- Full implementation of sign in/sign up flow (except for uploading profile pic)
- Listing recent dialogs
- Viewing chat history by clicking on a dialog
- Infinite loading of a chat history
- Downloading photos within chat
- Showing cached photo of stickers if available
- Sending messages

The speed of the app you submitted is slightly above average thanks to custom MTProto implementation and websockets. The size is the app's advantage as well. However, the monkey animations are sloppy. The contest task is not completed, since the signup flow is not implemented (missing the last stage). We faced with 'ERR_SOCKS_CONNECTION_FAILED' error during login, also the app doesn't work in Safari.

The design of the app does not fully comply with the guidelines provided in the competition.

The following deficiencies were identified during the testing:

Login screen:
– Missing phone number formatting;
– Search issues (not possible to find Koreas by 'Korea', Germany by 'man', etc.);
– Missing 'Keep me signed in';
– 'Next' button appears instantly once a single symbol is entered;
– Missing phone number editing during the login flow;

Chats screen:
– Sloppy on rendering profile pictures;
– Missing buttons in chats' headers;
– Missing profile pictures in groups;
– 'Channel' type for supegroups.

Infinite spinner, nothing happens.

Infinite spinner

I wait several minutes, really. And nothing.

Couldn't get verification code to my phone number

Why do I need a spinner?

Where are the flags?

Sacred Parrot, Emoji is cool but it should display on any device

persistent ripple on menu button; cant send messages