Tutorials on Johnson Lai · Forward Deployed Engineer

How to set up ClawChain

Wed, 11 Feb 2026 14:00:00 +0800

ClawChain is an on-chain social network on Chromia where only AI agents can post. Think of it as a social feed, but every account and every post lives on the blockchain.

Why does that matter? When Moltbook launched as an AI-only social network, a security researcher registered 1 million fake agents on it. There was no way to tell real agents from fakes, and the platform fell apart. ClawChain avoids this by requiring a wallet transaction to register and a verified X account to claim your agent, so spinning up fake accounts at scale isn’t really feasible.

Guide on Storing Virtual ACP data on Chromia

Thu, 20 Nov 2025 17:59:18 +0800

Virtuals’ ACP job data is recorded on Base chain, but on-chain data is hard to query, this is because it’s buried in calldata that’s tough to parse.

Most ACP agents today use centralized db for readability, but this approach sacrifices transparency and brings single points of failure.

What if you could have easy querying without losing decentralization or verifiability?

With just a few lines of code, you are able to use Chromia as a decentralized database for ACP agents, unlocking easy, dev-friendly queries while preserving transparency and simplicity.

XiaoZhi: The Open Source $15 AI Robot OS That's Changing Physical AI

Fri, 06 Jun 2025 09:59:18 +0800

Remember when the Rabbit R1 ($199) and Humane AI Pin ($700+subscription) promised to revolutionize AI hardware? They raised hundreds of millions, generated massive hype, and ultimately disappointed users with broken promises and locked ecosystems.

Rabbit R1 and Humane AI Pin

What if I told you there’s a $15 device that actually delivers what those expensive gadgets promised?

I discovered it during a recent trip to Shanghai, a viral AI physical robot called XiaoZhi (小智) that’s taking China by storm while remaining virtually unknown in the West. According to reports, XiaoZhi has already crossed the 100,000 active device threshold in just a few months, potentially making it the first AI-native hardware ecosystem to reach such numbers this quickly.

My Journey of Automating a Telegram Game

Wed, 09 Oct 2024 05:59:18 +0800

Automating boring tasks has always been a driving force behind my passion for building software.

A few months ago, I stumbled upon the Telegram game Lumberjack, which seemed like an ideal project for testing automation using simple pixel matching mechanics. Its straightforward mechanics made it an appealing target for experimenting with different automation approaches.

The Game: Lumberjack Link to heading

Lumberjack is a simple Telegram game where players chop a tree while avoiding branches. The objective is to press the arrow key opposite to the side of the last branch to avoid hitting the lumberjack’s head.

Blockchain IoT Weather Oracle on Chromia with Arduino

Sun, 22 Sep 2024 11:21:52 +0800

Introduction Link to heading

Integrating IoT with blockchain technology enhances data security, transparency, and reliability—crucial for IoT applications. Blockchain’s tamper-proof ledger and ability to timestamp data make it ideal for securely managing IoT information.

In this guide, we’ll build a blockchain-based IoT weather oracle using a thermistor sensor, Arduino, and Johnny-Five.js, storing real-time data on Chromia, a Layer-1 relational blockchain platform.

Project Overview Link to heading

We’ll create a weather data oracle using:

Run Chasm Node with Home PC

Sat, 20 Jul 2024 15:59:18 +0800

Chasm nodes are lightweight and can run on devices with as little as 2GB of RAM, including a Raspberry Pi. This guide is intended for those who want to try running a scout node for fun and to understand the Chasm Network better.

Important Note: For optimal security, low latency, and better performance, we strongly recommend using a Virtual Private Server (VPS) instead of a home PC to run your Chasm node. This guide is primarily for educational purposes and for those who want to experiment with running a node at home.

Chasm Network Scout Season 0 Hosting Tutorial

Thu, 18 Jul 2024 11:21:52 +0800

In this guide, I will walk you through the process of running Chasm Scout in Season 0 using Digital Ocean. Please note that you should always refer to the Official Guide from Chasm Network for the most up-to-date information.

I’ve chosen Digital Ocean for two main reasons:

It’s easy to use, especially for those new to cloud services.
Unlike AWS or GCP, it doesn’t require going through a complex DevOps process.

While Digital Ocean may be more expensive than some alternatives, it offers a user-friendly experience that’s ideal for this guide. For those seeking more cost-effective options, platforms like Linode, Contabo, Google GCP, AWS or Microsoft Azure can also be considered.