Provided by Amazon Web Services (AWS)Yellow Network lets you deposit crypto once and make lightning-fast transactions without waiting for blockchain confirmations or paying gas each time. It combines the best of both worlds — the speed of off-chain systems and the security of smart contracts.
Most interactions between parties don't need immediate on-chain settlement. Consider a chess game with a 10 USDC wager:
💡 How it works: When you send funds or interact with an app, your transfers happen off-chain through a secure network of Yellow nodes that keep balances in sync. It feels instant, like using a regular web2 app. Smart contracts on each blockchain act as safes: they hold your deposit, verify everything, and make sure your money is protected. If you ever stop using the app or want to withdraw, your final balance is settled on-chain. Your session is protected by unique digital keys that only you control. No one can change your balance or take your funds. Even if something goes wrong, your assets automatically return to you.
🚀 Key features:
Use the Yellow SDK and Nitrolite protocol to build a mini-app or feature that showcases instant, session-based transactions - all happening off-chain and settling on-chain when needed.
💥 How to participate
🛍️ Example App Ideas
✅ Qualification Requirements - to qualify for the Yellow Network Prize, your project must:
🏆 Judging Criteria Projects will be evaluated based on:
Uniswap v4 is an automated market maker protocol designed to be extensible, efficient, and customizable, enabling developers to create new market structures on top of shared, secure liquidity. We’re calling on developers to build on Uniswap v4 and explore how liquidity, trading, and financial infrastructure can continue to evolve within decentralized finance, where tokenized value is deployed and exchanged onchain.
Build on Uniswap v4 to explore agent-driven financial systems. Projects may involve agents that programmatically interact with Uniswap v4 pools for liquidity management, trade execution, routing, coordination, or other behaviors enabled by onchain state. Submissions should emphasize reliability, transparency, and composability over speculative intelligence. The use of Hooks is optional and encouraged where it meaningfully supports the design.
A user interface is not required, but projects must provide clear evidence of functional code. Each team must submit: TxID transactions (tesnet and/or mainnet) a GitHub repository, README.md, demo link or setup instructions, and a demo video (max 3 min).
Build on Uniswap v4 to explore privacy-enhancing financial systems in decentralized markets. Projects may introduce mechanisms that improve how information is handled during onchain trading and liquidity provision, such as reducing unnecessary information exposure, improving execution quality, or designing market behavior that is more resilient to adverse selection and extractive dynamics. Submissions should emphasize responsible, transparent system design that preserves onchain verifiability and protocol integrity. The use of Hooks is optional and encouraged where it meaningfully supports the design.
A user interface is not required, but projects must provide clear evidence of functional code. Each team must submit: TxID transactions (tesnet and/or mainnet) a GitHub repository, README.md, demo link or setup instructions, and a demo video (max 3 min).
Sui brings together high performance, strong security, and deep composability to form a DeFi foundation built for real-world scale. We’re inviting developers to use these capabilities to create the next generation of DeFi—applications that aren’t possible on other platforms.
This hackathon is also an opportunity to begin a longer-term relationship with the Sui ecosystem. We’re actively looking for strong builders and teams to continue working with beyond HackMoney, including through our Moonshot Program, which provides ongoing technical, strategic, and financial support to promising DeFi projects. If you’re interested in building on Sui beyond a single hackathon, this track is designed to help you get there.
Awarded to the project that best demonstrates a compelling use of Sui to build a high-quality DeFi application. The Best Overall Project stands out across multiple dimensions, including technical execution, product thinking, and user experience, while showing clear potential to evolve beyond the hackathon.
This prize recognizes teams that not only build something impressive in a week, but also show thoughtful design choices and a strong foundation for continued development within the Sui ecosystem.
To be eligible for the Best Overall Project prize, submissions must: • Be built on Sui and meaningfully use Sui-specific capabilities • Include a working prototype or demo • Clearly explain the problem being solved and why Sui is well-suited for it • Demonstrate strong execution across at least two areas (e.g. UX, technical design, market insight, or creativity) • Show potential for continued development beyond the hackathon
Notable Projects recognize teams that demonstrate standout strength in a specific dimension of their submission. These projects may excel in areas such as user experience, creative DeFi design, technical execution, or novel use of Sui’s capabilities.
This prize is designed to highlight high-quality work that shows clear promise, thoughtful craftsmanship, and strong alignment with the Sui ecosystem—even if the project is early or focused on a particular aspect rather than end-to-end polish.
To be eligible for a Notable Project award, submissions must: • Be built on Sui • Include a working prototype or functional demo • Clearly articulate the idea and design decisions • Demonstrate clear strength in at least one key area (e.g. UX, technical innovation, creativity, or product insight) • Show potential for continued iteration or expansion beyond the hackathon
Arc is the purpose-built L1 blockchain from Circle, EVM-compatible, and serves as the Economic OS for the internet — powering the programmable trust layer and transaction engine where capital, humans, and machines coordinate to drive real economic growth. Arc enables builders and issuers worldwide to power the next era of onchain lending, capital markets, FX, and payments - igniting liquidity across currencies and asset classes.
Build apps that treat multiple chains as one liquidity surface, using Arc to move USDC wherever it’s needed. Projects should demonstrate how capital can be sourced, routed, and settled across chains without fragmenting user experience.
What we’re looking for: -Crosschain payments, credit, or treasury systems -Applications that are not locked to a single chain -Seamless user experience despite crosschain complexity
CIRCLE TOOLS REQUIRED: Arc, USDC CIRCLE TOOLS RECOMMENDED: Circle Wallets, Circle Gateway
Qualification Requirements Submissions will be evaluated based on the following parameters. Please be clear what bounty you are submitting for as a part of your submission!
Build payout or treasury systems that move USDC globally, automatically, and reliably. Projects should show how onchain infrastructure can support real-world financial operations like payroll, revenue distribution, or fund settlements.
What we’re looking for: -Automated or agent-driven payout logic -Multi-recipient, multi-chain settlement -Treasury systems backed by RWAs -Policy-based or condition-based payouts
CIRCLE TOOLS REQUIRED: Arc, USDC CIRCLE TOOLS RECOMMENDED: Circle Gateway, Circle Wallets, Bridge Kit
Submissions will be evaluated based on the following parameters. Please be clear what bounty you are submitting for as a part of your submission!
Build applications where autonomous agents use real-world assets as productive capital to power onchain commerce. Projects should showcase agents that can make decisions, execute transactions, and manage risk, all settled in USDC.
What we’re looking for: -AI agents that borrow, repay, or rebalance against RWA collateral -Autonomous spending, payments, or treasury management -USDC-denominated credit or cash flow backed by RWAs -Clear agent decision logic tied to oracle or market signals
REQUIRED TOOLS: Arc, USDC RECOMMENDED TOOLS: Circle Wallets, Circle Contracts, Circle Gateway, Stork
Qualification Requirements Submissions will be evaluated based on the following parameters. Please be clear what bounty you are submitting for as a part of your submission!
LI.FI is a cross-chain liquidity and execution layer that lets you swap, bridge, and call contracts across many chains through one SDK/API. With a single integration, you can build DeFi experiences where users move from token A on chain X to token B or a position on chain Y in one seamless flow. LI.FI automatically routes across the best DEXs and bridges under the hood. During HackMoney you can use LI.FI to build cross-chain vaults, ‘deposit from anywhere’ on-ramps into DeFi protocols, rebalancing/arb agents, and wallet or fintech UX that treat liquidity as one unified market instead of fragmented chains.
Awarded to the project that most creatively uses LI.FI Composer to orchestrate multi-step DeFi workflows in a single, user-friendly experience.
Examples Ideas:
Cross-chain deposit into a vault, staged leverage/hedging strategies, or multi-step LP provisioning with a single sign. Deposit from any chain into a single restaking or yield strategy. Turn any asset on any EVM chain into a Perps margin position on a specific chain.
Use the LI.FI SDK or APIs for at least one cross-chain action (swap, bridge, or swap+bridge+contract call). Support at least two EVM chains in the user journey. Ship a working frontend (web, mobile, or wallet plugin) that a judge can click through. Each submission must include a Github repository of the project and a video demo going through your project in detail.
Awarded to the most innovative AI-powered agent or smart app that uses LI.FI as its cross-chain execution layer.
Examples: An on-chain or off-chain agent that uses LI.FI routes to manage positions, rebalance liquidity, or execute cross-chain strategies automatically. A rebalancing bot that moves liquidity or collateral between chains to maintain target allocations. An arbitrage or routing agent that uses LI.FI quotes as part of its strategy. etc
Use LI.FI programmatically (SDK/API or contract calls) to perform cross-chain actions. Implement a clear strategy loop: monitor state, decide, then act using LI.FI. Provide either a minimal UI or a clear CLI/script demo with logs. Your submission must include a video demo and Github URL of the project
Awarded to the best DeFi product, wallet, or protocol integrations that use LI.FI to unlock cross-chain liquidity or UX. On this prize, you can build or extend any DeFi product that integrates LI.FI as its cross-chain routing and liquidity layer. Focus on solving a concrete user problem (e.g., cross-chain deposits, cross-chain re-collateralization, migrating positions, multi-chain treasury tooling) with a robust, production-ready integration.
Use LI.FI’s core API/SDK to power cross-chain swaps/bridges or deposits. Integrate at least one external DeFi protocol or wallet context (e.g., lending, restaking, LP, on-chain fund). Emphasis on reliability and UX for DeFi users (handles slippage, errors, gas, etc.) Submission must include a video demo of the project and a Github URL
Decentralized naming for wallets, contracts, agents, websites and more. Replace 0x addresses with human-readable names. Leverage portable profiles, payment settings, and social features with ENS!
Any type of ENS integration is eligible for this pool prize, split evenly among all eligible projects. Get creative!
You need to write some code specifically for ENS, even if it's just a couple wagmi hooks. Simply using Rainbowkit does not count. Your demo must be functional and not contain hard-coded values. Upon submission, your project showcase must have a video recording or link to a live demo (ideally both) and the code needs to be open source and accessible on Github or a similar platform.
ENS is often thought of as simple name <> address mapping, but really its much more flexible! Names can store arbitrary data via text records, decentralized websites via content hash and more.
This prize goes to the most creative application of ENS in DeFi. This could be some sort of swap preferences stored in text records, DEX contracts that are named via ENS, decentralized interfaces or anything else.
It should be obvious how ENS improves your product and is not just implemented as an afterthought. Your demo must be functional and not just include hard-coded values. Upon submission, your project showcase must have a video recording or link to a live demo (ideally both) and the code needs to be open source and accessible on Github or a similar platform.