XYZLeague was a Play2Earn esports platform built for pro CSGO tournaments with Solana-based payouts. Here is everything we learned about blockchain gaming UX.
Play2Earn Was the Buzzword, Retention Was the Goal
XYZLeague was a Silicon Valley startup building a competitive CSGO esports platform on Solana. The premise: pro players could enter tournaments, place stake on their own performance, and receive crypto payouts automatically via smart contract when results were verified. The client came to us with a whitepaper and a Figma file. Our job was to turn that into a functioning platform in eight months. The real challenge was not the blockchain — it was making an esports platform that serious CSGO players would respect.
The Solana Tech Stack: Rust, Anchor, and Phantom Wallet
We wrote the on-chain programs in Rust using the Anchor framework, which provides a higher-level abstraction over raw Solana programs and dramatically reduces the attack surface for common vulnerabilities. Tournament escrow accounts held player stakes until match results were submitted by verified oracles. Phantom Wallet integration used the Solana Wallet Adapter library — one of the most mature wallet connection patterns in the ecosystem. The frontend was built in Next.js with Tailwind CSS, and all blockchain interactions were isolated in a custom hook layer that made them testable with Jest mocks.
Real-Time Match Data Without Losing Your Mind
Esports platforms live and die on real-time data. We used Socket.io with a Node.js backend for match state updates, broadcasting to all connected clients within 100ms of a score change. The tricky part was reconciling WebSocket state with on-chain state — the two have very different update speeds. Our solution was an optimistic UI layer that displayed WebSocket data immediately while confirming the canonical state from the chain in the background. If they ever diverged (rare, but it happened during network congestion), we showed a subtle sync indicator and resolved silently.
What We Would Do Differently in 2025
Looking back, the biggest lesson was prioritizing wallet UX earlier. We underestimated how much friction Phantom Wallet creates for new users who have never held SOL before. Today we would build a fiat on-ramp (Moonpay or Coinbase Pay) directly into the onboarding flow. We would also use Solana Mobile Stack's seed vault for mobile users instead of browser extension patterns. The gaming mechanics themselves were solid — but we lost potential users at the wallet connection step, which is a problem every Web3 product faces and very few solve well.
“We wrote on-chain programs in Rust using Anchor — which reduces the attack surface for common vulnerabilities and makes programs auditable.”
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