SIKE

SIKE, which stands for Spatial + Likes, is a micro-tipping tool built for XR environments where every gesture becomes a transaction. It allows people to tip each other using stablecoins like PYUSD in a completely natural way, without requiring wallet popups or manual signing. The project is designed for Meta Horizon OS and is currently demoed on the Quest 3 headset, while keeping in mind the upcoming Meta Ray-Ban Glasses and Neural Band. We are limited by the technology of our time, so for now we emulate Meta Glasses using Quest 3.

How It Works Users begin by creating an account on www.getsiked.xyz. Each account automatically comes with a wallet and a custom tipping address. Users can fund their accounts with PYUSD or other stablecoins, and once funded, they are ready to interact in XR. TTo send or receive tips, the sender first scans the receiver’s QR code, which is encoded with the receiver’s unique tipping URL. Once the scan is complete, both the sender and the receiver perform the same gesture at the same time. The gesture recognition then triggers the transaction automatically and confirms it with instant visual feedback inside the XR space. Every interaction, whether a micro-tip or a POAP mint, is recorded on-chain without requiring additional wallet interaction.

Inspiration and Vision The inspiration for SIKE came from NOICE.SO and the game Death Stranding, both of which emphasize the power of small social interactions to create meaningful connections. With the announcements of Meta Glasses and Neural Band, the XR experience is expected to evolve rapidly, and we see SIKE as a tool that can integrate seamlessly into this future. By tying together gestures, blockchain, and stablecoins, we are building for a world where micro-transactions happen as effortlessly as giving someone a thumbs-up.

What Makes Us Different We are one of the few developer teams in India with official access to the Meta Horizon developer platform. This gives us the ability to experiment, build, and ship faster than most competitors, and ensures that SIKE is not just a demo but a product ready for mass adoption when wearable XR devices become mainstream. The choice to use PYUSD for micro-tipping ensures stability and simplicity in value transfer, which is crucial for everyday use.

Impact SIKE turns everyday gestures into meaningful economic and social actions. A quick gesture can send a tip, mint a POAP, or record a shared moment on-chain. This opens up new ways to support creators, engage communities, and build trust in digital interactions. By removing friction from the tipping process, we are creating a new layer of social currency in XR that feels natural, human, and scalable.

We built SIKE by combining XR tools, blockchain contracts, and web infrastructure into a single fluid experience. On the XR side, we used Quest Camera KIT along with the Passthrough Camera API to anchor digital interactions into real environments. The core client was developed in Unity with C# and the XR Interaction Toolkit, which we extended for gesture pattern recognition. For the QR scanning flow, we integrated ZXING and NuGet, which allowed us to reliably detect and parse QR codes inside the XR environment. Together, these components helped us create as seamless an XR experience as possible for the end user.

On the web side, we built www.getsiked.xyz with separate frontend and backend components, both written in Next.js. The web platform provisions a non-custodial wallet for every user and generates a custom tip URL and POAP URL. These URLs are then encoded into QR codes that can be scanned from inside XR. To accelerate development and polish, we used Replit AI Agent to help build and iterate on the UI components.

For value transfer, we integrated PYUSD stablecoins to ensure tips remain stable and accessible. We wrote smart contracts for tipping and POAP minting and connected them through a relayer middleware. This relayer is what translates the recognized gesture signals into blockchain meta-transactions, removing the need for wallet popups or manual signatures. The result is a gasless, automatic flow where money moves at the speed of human gestures.

The most hacky part of the build was bridging gesture recognition from Unity to blockchain transactions in real time. By wiring gesture events directly into our relayer and combining them with QR-encoded tip URLs, we created an end-to-end experience where scanning, gesturing, and tipping happen almost instantly, without breaking immersion.