HyperSphere

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Mobile Test

Inspiration:

Modern crypto payments are growing online, but in-store adoption remains clunky. Tap-to-pay solutions for USDC could streamline real-world crypto transactions.

What it does:

Hypersphere enables seamless, cross-chain tap-to-pay using only two phones. Merchants generate chain-specific payment requests, customers confirm transactions locally, and funds settle instantly with CCTP-enabled cross-chain support.

How we built it:

React frontend, Node.js/Express backend, SQLite database. Solana, Base, and Ethereum integration via SDKs and smart contracts. NFC Host Card Emulation generates payments, CCTP enables cross-chain USDC transfers.

Challenges we ran into:

Handling multi-chain compatibility, ensuring secure instant settlement, integrating CCTP, and designing a simple, intuitive UX without exposing private keys.

Accomplishments that we're proud of:

Working end-to-end tap-to-pay across multiple chains, instant merchant settlement, and a clean analytics dashboard. Fully functional prototype demonstrating real-world usability.

What we learned:

Cross-chain payments introduce complexity in transaction construction, settlement, and UX. NFC interactions and smart contract integration require careful orchestration.

What's next for HyperSphere:

Expand token support, add more merchant and chain integrations, enhance analytics, and explore scaling for larger adoption in physical retail and events.