Rayls Hackathon #2 | EthCC, Cannes
The Rayls Developer Program returns at EthCC Cannes, hosted in an exclusive Chateau on the French Riviera.
This is not a typical hackathon. Every participating team will receive sovereign access to a Rayls Privacy Node: a private, institution-grade blockchain with a built-in bridge to the Rayls Public L1. Your challenge is to build the complete pipeline, from confidential asset creation, through AI-governed disclosure, to live public market trading.
Approved participants will be provided with meals, accommodation, and refreshments for the full duration. The event closes with an unmissable Happy Hour on Sunday evening.
"Banks across Latin America didn't choose the Privacy Node because it was interesting. They chose it because it works. Now it's yours to build on."
— Selvaggia Di Fazio, Product, Rayls Privacy Ecosystem
What you will build
Each team receives a dedicated Privacy Node, a sovereign chain that belongs to your institution alone. Nothing you deploy there is visible to the outside world until you decide to disclose it. Your mission is to take an asset from invisible to tradeable, with AI agents governing every step of the reveal.
Design Privately
Deploy rich, complex assets on your sovereign Privacy Node. Full metadata, access rules, private balances. Nobody sees anything yet.
AI Attestation
An AI agent inspects your asset and produces a signed proof of existence, posted to the public chain without exposing private details.
Governance & Approval
Submit for institutional disclosure review. An AI compliance agent evaluates the asset and produces a structured recommendation for human approval.
Bridge & Simplify
Once approved, your complex private asset crosses to the Public L1 in a simplified, tradeable form. You decide what gets revealed.
List & Trade
Deploy a marketplace on the Public L1. Your once-invisible asset is now publicly discoverable — with full AI-attested provenance.
Three challenges to choose from
1.RWA Tokenization
Tokenize a real-world asset - bond, invoice, fund share - privately. An AI compliance agent reviews it before it ever goes public. Bridge a clean receipt token to the marketplace.
AI Role: Governance compliance reviewer
2.Confidential NFT Reveal
Mint a high-value digital asset with fully private metadata. An AI oracle attests its existence on-chain. The asset reveals itself to buyers, but only after they purchase.
AI Role: Cross-chain attestation oracle
3.Autonomous Institution Agent
Build an AI agent that runs an entire institutional treasury: detecting assets, attesting them, submitting governance, bridging, and listing autonomously. Humans watch; the agent operates.
AI Role: Full autonomous orchestration
Who should apply
• Smart contract developers ready to push the limits of privacy-preserving asset design on a sovereign EVM chain.
• AI builders who want to deploy agents as on-chain attestation oracles, compliance reviewers, and autonomous treasury operators.
• Infrastructure engineers eager to bridge TradFi RWAs to the DeFi community through a live institutional-grade pipeline.
• Product teams and hackers who want to explore what is possible when finality is measured in milliseconds and disclosure is governed on-chain.
• Institutions looking for a compliant, sovereign chain environment to begin their journey into the EVM ecosystem.
“The developer community is the heart of Rayls. This program gives builders real influence over how sub-second Ethereum evolves — not just to use our chain, but to define what it becomes.”
— Alex Jupiter, Product, Rayls Public Chain
How projects are judged
Sovereignty
Did you use the Privacy Node's private space meaningfully? Would any of this be possible on a standard public chain?
Disclosure Design
How thoughtfully did you decide what to expose publicly vs. keep private? Does the split reflect real institutional logic?
AI Integration
Is the AI doing real, verifiable work, attesting, reviewing, orchestrating with on-chain artifacts to prove it?
Public Market Viability
Is the marketplace usable? Does it communicate provenance and trust in a way a real buyer would understand?
Working Prototype
Does it run? Live demos under pressure are how the best builders distinguish themselves. Are the transactions visible on the explorers?
Hackathon prize pool
Winning projects will share the following prizes in RLS.
🥇 $10,000
🥈 $5,000
🥉 $2,500
All participants will receive Rayls branded merchandise, including sleeping bags and food and drink will be provided throughout.
Only attendees in Cannes can participate, no virtual attendees are allowed. But we will be running a virtual hackathon at a later date that you can sign up for in the Rayls Developer Grants Program form here.
Rayls is a blockchain ecosystem that is merging the worlds of TradFi and DeFi. Already in market with a private permissioned blockchain network connecting various banks across LatAm. The new Rayls Public Chain aims to be the place where the existing TradFi world and the new DeFi builders meet. This new public blockchain is fast, modular, and open.
Built atop reth, the ultra-performant Ethereum execution client by Paradigm, Rayls brings sub-second block finality — designed to make decentralized systems feel instant without compromising security or decentralization.
Our mission is simple: make public blockchains fast enough, open enough, and developer-friendly enough to rival the world’s most reliable systems, while maintaining full compatibility with the Ethereum ecosystem.
More information on Rayls can be read in the litepaper: Litepaper
Ethereum Alignment
Rayls is deeply Ethereum-aligned, with work underway to create new trust anchors that integrate directly with Ethereum Layer 1. This ongoing development aims to make Rayls not just EVM-compatible, but verifiably connected to Ethereum’s security model. While this feature is still in active development, it reflects Rayls’ long-term goal: to strengthen the Ethereum network’s reach rather than compete with it.
About LimeChain:
LimeChain is a blockchain development and consulting company helping startups excel since 2017. Our team combines extensive blockchain experience to identify, build and integrate all the elements, solutions, and innovations required for our clients to succeed.
X: @LimeChainHQ