🛠️ Flare Workshop
Description coming soon..
This workshop is happening in-person
04:00 PM CEST — Friday, May 30, 2025 in Workshop Room 1
ETHGlobal PragueAbout
Blockscout block explorer provides many access points to blockchain data, and in this hackathon we are providing many different ways you can use Blockscout! Our bounties offer a little something for everyone, from complex data integrations to piece of cake link swaps, we’re excited to see how you use Blockscout in your hack! - Our APIs (both REST and JSON RPC) provide a huge and diverse set of blockchain data that can be seamlessly integrated into your app. - Our new SDK is another integration option to give users real-time transaction feedback. - Blockscout Merits (points) API can be used to reward your users with Merits. - Link updates (point your explorer links to Blockscout), contract verification and other actions are uncomplicated ways to try Blockscout and qualify for our pool prize.Prizes
⭐️ Best use of Blockscout ⸺ $6,000
🥇
1st place
$3,000
🥈
2nd place
$2,000
🥉
3rd place
$1,000
Serve data to your app with Blockscout APIs or modify Blockscout itself with new frontend features or stats. Show us what you’ve got, the bigger the Blockscout usage the better! All entrants into the Best use of Blockscout prize will also be entered into our 10K prize pool.
Qualification Requirements
Use Blockscout and show Blockscout in your presentation. Switch links so Blockscout is the primary explorer for your app and users.
Links and Resources
📚 Best Blockscout SDK Integration ⸺ $3,000
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1st place
$2,000
🥈
2nd place
$1,000
Integrate the new Blockscout SDK into your app and provide interactivity and instant explorer feedback to your users. Easy integration + valuable UI enhancements = best usage! All entrants into the Best Blockscout SDK integration will also qualify for the Blockscout pool prize.
Qualification Requirements
Use Blockscout and show Blockscout in your presentation. Switch links so Blockscout is the primary explorer for your app and users.
🐹 Best Blockscout Merits (points) Use Case ⸺ $1,000
Merits are Blockscout points, and test Merits can be integrated into your app with our REST API. Create a signup, show users their balance or distribute Merits to users for completing tasks on your app. Any and all use cases are welcome! All entrants into the Best Blockscout Merits (points) Use Case will also qualify for the Big Blockscout pool prize.
Qualification Requirements
You must use the Blockscout Merits REST API in your project and describe your rewards use case to our judges. Switch your explorer links to Blockscout and show Blockscout Merits in your presentation.
Links and Resources
💧 Big Blockscout Explorer Pool Prize ⸺ $10,000
Split evenly between all qualifying projects
Use Blockscout instead of another explorer. Change your app’s links to Blockscout, verify your contracts, launch with Autoscout, or use our REST or JSON RPC APIs. Participants in other Blockscout bounties will also be entered into the pool prize. Use Blockscout and show how you did it in your presentation, and you will qualify for a share in the big pool prize!
Qualification Requirements
Use Blockscout and show Blockscout in your presentation. Switch links so Blockscout is the primary explorer for your app and users.
Links and Resources
About
1inch seamlessly unites multiple decentralized protocols, empowering users to perform efficient, user-friendly and secure operations in the Web3 space. --- 1inch provides access to hundreds of liquidity sources across multiple blockchains. Its main components are the 1inch Aggregation Protocol, the 1inch Liquidity Protocol, the 1inch Limit Order Protocol and the 1inch Wallet – a fast and secure mobile application for storing, receiving, sending and swapping crypto assets. --- The 1inch Swap Engine, built on top of 1inch’s Aggregation Protocol and Limit Order Protocol, is a decentralized trading and matching system that connects DEX users with practically limitless liquidity. The 1inch Swap Engine executes trade orders using the Dutch auction model, providing more efficiency, flexibility and tunability than regular swaps or limit orders. --- Powered by the 1inch Swap Engine, Fusion mode enables users to swap tokens without paying any network fees and at the most favorable rates. In addition, Fusion mode offers users extra MEV protection. All swaps in Fusion mode are executed by resolvers – professional traders, who use the most sophisticated and efficient ways of protecting users’ swaps from MEV.Prize details coming soon
About
LayerZero is an omnichain interoperability protocol that enables seamless communication between different blockchains. It allows developers to build omnichain applications (OApps) that can interact across multiple chains as if they were on a single chain. Why build with LayerZero at a hackathon — Reach More Users: Deploy your dApp once and interact with users and assets across all supported chains. — Unify Liquidity: Avoid fragmented liquidity; build DEXes, lending platforms, etc., that leverage a shared cross-chain pool. — Simplify Development: Build complex cross-chain logic using familiar tools (Hardhat, Foundry, etc.) and LayerZero's contract standards (OApp, OFT, ONFT). Get started quickly with the create-lz-oapp CLI. — Enhance Security: Benefit from a configurable, decentralized security model using Decentralized Verifier Networks (DVNs). — Improve User Experience: Abstract away cross-chain complexities, offering seamless interactions without users needing multiple wallets or bridging steps. — Innovate: Explore novel use cases like cross-chain governance, gaming, data queries (lzRead), and complex multi-step workflows (Composability).Prizes
📖 lzRead Track ⸺ $4,000
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1st place
$2,500
🥈
2nd place
$1,500
Develop a comprehensive solution using LayerZero Read (lzRead) to request, retrieve, and process external on-chain state from destination blockchains.
Your solution should use lzRead to perform cross-chain data queries and update state on the source or another destination chain based on the retrieved data.
Projects should focus on secure and efficient cross-chain data queries, using features like lzMap() and lzReduce() for off-chain computation.
Qualification Requirements
1. Utilization of LayerZero Read Features Implement the lzRead protocol to perform cross-chain data retrieval from at least one supported destination blockchain. Use LayerZero's Blockchain Query Language (lzRead) to construct and execute data queries across multiple chains. 2. Effectively request and retrieve on-chain state data from a destination blockchain using lzRead. Process the retrieved data and update the state on the source blockchain or another destination chain based on the retrieved information.Demonstrate seamless synchronization and utilization of the updated state across the involved blockchains. 3. Working Demonstration Provide a working demo of your solution, showcasing the complete workflow from data retrieval using lzRead to state updates across chains. If the implementation is complex, ensure that all key functionalities are effectively demonstrated.
🧩 Composability Track ⸺ $4,000
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1st place
$2,500
🥈
2nd place
$1,500
Build an innovative application that showcases LayerZero's horizontal composability features. Your project should break down a complex cross-chain workflow into discrete, sequential steps managed through LayerZero messages.
Demonstrate how you can trigger follow-up actions (composed messages) on a destination chain after an initial LayerZero message is delivered, potentially involving interactions with multiple contracts or protocols across different chains.
Focus on creating advanced, multi-step workflows that wouldn't be easily possible with traditional bridging or single atomic cross-chain transactions. Show how this approach improves user experience, reliability, or enables new use cases by decoupling operations and leveraging LayerZero's message-passing framework.
🎖️ General Prize Track ⸺ $2,000
Up to 2 teams will receive $1,000
For outstanding projects utilizing any LayerZero feature (OApp, OFT, ONFT, lzRead, Composability) to build a compelling omnichain application.
This track rewards creative and well-executed projects that demonstrate the power and potential of LayerZero, even if they don't fit perfectly into the specific lzRead or Composability tracks. Show us your best omnichain ideas!
Qualification Requirements
1. Omnichain Messaging: Implement omnichain messaging solution via LayerZero integration, ensuring the application is built on Endpoint V2 for seamless cross-chain communication. 2. Working Demo: We encourage you to build a well-rounded and polished project. If your implementation is complex, please at least demonstrate a complete implementation.
About
Flow is a layer one blockchain with a powerful smart contract language (Cadence) and full EVM equivalence (any Solidity, smart contract, or protocol that works on Ethereum or an EVM L2 works on Flow). The network was designed from the ground up to enable consumer crypto applications that scale to mainstream audiences and seamlessly connect to digital ecosystems. It is based on a unique, multi-role architecture, and designed to scale without sharding, allowing for massive improvements in speed and throughput while preserving a developer-friendly, ACID-compliant environment. Flow has been architected with a clear vision for the future of consumer crypto, and meticulously designed to address the shortcomings of earlier blockchains to ensure scalability, usability, and efficiency are not simply an afterthought. By incorporating critical protocol-level primitives, such as account abstraction and on-chain randomness, as well a powerful transaction model and scalability without sharding, Flow sets itself apart as a blockchain made for those interested in building apps for widespread adoption and developer-friendly innovation.Prizes
🚀 Best Killer App on Flow ⸺ $6,000
🥇
1st place
$3,500
🥈
2nd place
$1,500
🥉
3rd place
$1,000
Consumer-oriented “killer apps” have the power to define and lead entire industries by solving real user pain points at scale—think of how ChatGPT made AI accessible to hundreds of millions. Flow is designed for mass adoption and consumer-grade experiences, so we’re looking for the next breakthrough application that can capture the interest of millions (or billions!) of everyday users.
This is a very broad bounty and eligible projects include everything from AI Agents and RWA to games and social apps.
Qualification Requirements
• Deploy a smart contract or run transactions on Flow Testnet or Flow Mainnet
Links and Resources
🌐 Best Cross-Chain DeFi on Flow ⸺ $4,000
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1st place
$2,500
🥈
2nd place
$1,500
The future of DeFi is cross-chain and Flow is ready to be at the center of it. This prize is for the most compelling projects that unlock cross-chain DeFi on Flow, whether it’s bridging liquidity, creating cross-chain yield strategies, or inventing seamless UX between Flow and other EVM ecosystems.
We want to see projects that:
• Bridge liquidity between Flow and other chains
• Integrate Flow into cross-chain DeFi protocols
• Invent new primitives that rely on multi-chain flows of assets or data
Build the next generation of DeFi that breaks silos and brings Flow into the global liquidity network.
Qualification Requirements
• Deploy a smart contract or running transactions on Flow Testnet or Flow Mainnet • Your submission must showcase a meaningful cross-chain DeFi use case
About
First announced in April 2021, the Pyth Network is the largest and fastest-growing first-party oracle for real-time asset price data and random numbers. Pyth delivers over 500 low-latency price feeds across digital assets, FX, ETFs, equities, and commodities to more than 50 blockchain ecosystems, securely and transparently. The Pyth Network comprises some of the world’s largest exchanges, market makers, and financial services providers, who contribute their proprietary price data to the Pyth oracle for on-chain aggregation and distribution to smart contract applications. Pyth introduces a pull oracle design which empowers apps to request or pull the latest price update to their native blockchain on demand. The Pyth Network has secured more than $300B in trading volume across hundreds of Web3 and Web2 applications.Prize details coming soon
About
The ``Flare Time Series Oracle (FTSO) provides decentralized data feeds to the Flare network. The Flare Data Connector (FDC) validas external data for Flare's EVM state (it's Web2Json attestation types can fetch arbitrary Web2 data). The Secure Random protocol generates a secure random number on-chain every 90 seconds.Prizes
🏆 MAIN TRACK: use protocols on Flare blockchain ⸺ $8,000
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1st place
$5,000
🥈
2nd place
$2,000
🥉
3rd place
$1,000
Build DApps utilising at least one of Flare’s Enshrined Data Protocols: FTSO (Flare Time Series Oracle) for price feeds, FDC (Flare Data Connector) for Web3 and Web2 data sources, or Flare’s secure Random Number Generator.
Qualification Requirements
DApps must make use of at least one of Flare's enshrined Data Protocols. Dapps must address real-world problems, or cater to specific use cases to be impactful. Add Feedback in the README describing your experience with building on Flare.
🎨 BONUS TRACK: external data source or cross chain application ⸺ $2,000
Up to 2 teams will receive $1,000
Most innovative external data source use case or most innovative cross chain application secured by Flare’s protocols.
Qualification Requirements
Show innovation by utilizing real world data in an on chain application. If you are using an external data source, provide a link to it's API. Can be combined with MAIN track or other bounties.
Links and Resources
Resources
Workshop
About
Committed to powering a digital economy underpinned by trust, Hedera stands apart as the leading enterprise-grade public blockchain on the market. The platform’s unique hashgraph technology ensures lightning fast performance combined with the highest levels of security and efficiency. With an open-source ecosystem and fixed, low fees, Hedera equips DeFi and enterprise developers with the predictability, tools, and services they need to build the next breakthrough application. The Hedera network is governed by a diverse council of the world’s leading institutions to ensure transparent and fair decision-making. By empowering the development of applications that address real-world challenges across DeFi, tokenization, AI, digital identity, and more, Hedera is building a new foundation for decentralized trust. For more information, visit www.hedera.com, or follow us on Twitter at @hedera, Telegram at t.me/hederahashgraph, or Discord at www.hedera.com/discord. The Hedera whitepaper can be found at www.hedera.com/papers.Prize details coming soon
About
vlayer aims to unlock web3's potential with robust data infrastructure. We simplify zero-knowledge proofs, making privacy and verification tools accessible to smart contract developers on EVM compatible chains. By integrating web2 data (web and email proofs) into web3 apps, we support a decentralized, secure, and efficient internet. We are on a mission to connect the otherwise disconnected worlds of Web2 and Web3. We are building a new category - verifiable data infrastructure. Our all-in-one infrastructure layer allows developers to extract, verify and integrate real-world data into Ethereum smart contracts, in the form of trustless claims. By integrating web2 data (web and email proofs) into web3 apps, we support a decentralized, secure, and efficient internet. Our technology is powered by state-of-art Zero Knowledge Proofs and optimised to provide the best developer experience. Key features: - Time travel: leverage history of on-chain data in your contracts - Teleport: compute cross-chain data from EVMs - Email Proofs: tap into trusted contents of emails - Web Proofs: bring private Web2 data on-chain Benefits of building with vlayer: - You can use Solidity and existing tooling like Foundry - No needs to learn new DSLs or programming languages - Access the key data sources directly from your Solidity smart contractPrizes
🦸 Most inspiring use of vlayer superpowers ⸺ $4,000
Create a dApp that uses verifiable data in on-chain contracts.
Examples:
- Airdrop for successful DeFi traders,
- Using LLM outputs by smart contracts or web3 games
- Proof of contribution into DAO/Github to be eligible for airdrop
- RWA use-cases like attesting ownership of certain items using email/web proofs
- Consumer facing app that allows email usage for AA wallet recovery
Qualification Requirements
This application has it all - a great idea and best-in-class implementation. The application must use at least one of vlayer’s four superpowers, as well as incorporating both Prover and Verifier contracts.
Links and Resources
🌐 Best use of Web Proofs ⸺ $2,000
Show how private data coming from web2 services can be used on-chain.
Examples:
- Proof of repost / reshare / mention on social media
- Proof of balance in Revolut/PayPal
- Proof of ARR/MRR in Stripe/Shopify
- Proof of Reserves in Coinbase / Binance
Qualification Requirements
The application must use Web Proofs, as well as incorporating both Prover and Verifier contracts.
📧 Best use of Email Proofs ⸺ $2,000
Show how emails can be used on-chain.
Examples:
- Controlling AA wallet with email
- NFT airdrop for people owning certain email domain
Qualification Requirements
The application must use Email Proofs, as well as incorporating both Prover and Verifier contracts.
🌀 Best use of Time Travel OR Teleport ⸺ $2,000
Show how historic and cross-chain data can be used on-chain.
Examples:
- Credit score for wallets using USDC or other ERC20
- Rewards/Airdrops for owners of certain NFT/ERC20 tokens
Qualification Requirements
The application must use Time Travel OR Teleport, as well as incorporating both Prover and Verifier contracts.
Resources
About
Building a mini app means you will get instant exposure to the 23 million World App users. All World App users already have an integrated wallet and free transaction fees on World Chain (part of the super chain). We will be working closely with teams that want to build a real app reaching millions of people this weekend. To be considered for the Mini App bounties you MUST use any of the Minikit SDK commands found on our docs. Learn more: https://www.youtube.com/watch?v=QJ0htHP6lb0Prizes
📲 Best Mini App ⸺ $10,000
🥇
1st place
$4,000
🥈
2nd place
$3,000
🥉
3rd place
$2,000
🏅
Honorable Mention
$500 ×2
Show us your best Mini Apps! Projects that build and deploy a Mini App using MiniKit are eligible for this prize.
Qualification Requirements
- build a Mini App with MiniKit - integrate any of the Minikit SDK Commands - if your Mini App uses on-chain activity, deploy your contracts to World Chain - your project must not be gambling or chance based - proof validation is required and needs to occur in a web backend or smart contract
Links and Resources
Resources
About
Rootstock is the first and longest-running Bitcoin sidechain, fully compatible with the Ethereum Virtual Machine (EVM). By using the Solidity programming language, it ensures seamless interoperability with Ethereum-based applications. On mainnet since 2018, Rootstock is secured by over 80% of the hash power of Bitcoin through a consensus mechanism known as Merged Mined Proof-Of-Work. It also uses a 1:1 to Bitcoin pegged native token RBTC that allows you to interact with DeFi protocols and dApps on the Rootstock network. You can use RBTC for minting, swaps, gas fees, and more.Prizes
🏆 Everyday DeFi ⸺ $4,000
🥇
1st place
$2,500
🥈
2nd place
$1,500
Build practical DeFi applications on Rootstock and/or RIF technologies. We’re looking for accessible, efficient tools that redefine everyday finance, with a special emphasis on generating native bitcoin yield.
🔸Yield farming strategies
🔸Lending protocols
🔸Decentralized exchanges (DEXs)
🔸Liquidity pools
Qualification Requirements
-Smart contract deployed in Rootstock and at least 2 on-chain (testnet) successful transactions. - Projects must have a description and a GitHub repository with a descriptive README. The README should include: 1) Clear short one-sentence description of your submission. 2) Short description of what you integrated Rootstock with and how. 3) Short description of the team and their backgrounds. 4) Clear instructions for testing the integration. 5) Feedback describing your experience with building on Rootstock. 6) A short video demo or slide deck.
🏆 Freestyle Track ⸺ $4,000
🥇
1st place
$2,500
🥈
2nd place
$1,500
Build high-quality decentralized applications (dApps) on Rootstock and unleash your creativity. We’re looking for innovative solutions and while not required, integrating AI-driven tools or techniques will earn you bonus points for showcasing advanced innovation
🔸DeFi Automation Agents
🔸Smart Contract Assistants
🔸Cross-Chain Interoperability Agents
🔸Decentralized Governance Helpers
Qualification Requirements
- Smart contract deployed in Rootstock and at least 2 on-chain (testnet) successful transactions. - Projects must have a description and a GitHub repository with a descriptive README. The README should include: 1) Clear short one-sentence description of your submission. 2) Short description of what you integrated Rootstock with and how. 3) Short description of the team and their backgrounds. 4) Clear instructions for testing the integration. 5) Feedback describing your experience with building on Rootstock. 6) A short video demo or slide deck.
🏆 RIF Economy ⸺ $2,000
Build anything that puts the RIF token to work on Rootstock; bonus points for slick, one‑step UX and creative token utility.
🔸RIF one‑click staking; bridge or swap then stake in a single flow
🔸RIF staking inside a Telegram mini‑app; think MEW‑style but in TG
🔸AI bot that answers English questions by querying Collective Graph subgraphs
🔸RIF‑POAPs; mint event badges or sub‑domain NFTs paid in RIF
🔸Social‑content rewards in RIF; track on‑chain engagement then tip users
🔸x402 payments; ship a lightweight SDK that lets devs accept USDRIF with Coinbase’s agentic standard
Qualification Requirements
- Smart contract deployed in Rootstock and at least 2 on-chain (testnet) successful transactions. - Projects must have a description and a GitHub repository with a descriptive README. The README should include: 1) Clear short one-sentence description of your submission. 2) Short description of what you integrated Rootstock with and how. 3) Short description of the team and their backgrounds. 4) Clear instructions for testing the integration. 5) Feedback describing your experience with building on Rootstock. 6) A short video demo or slide deck.
Resources
About
Yellow is a clearing Network that uses state channels to facilitate trading and settlement through smart contracts and on-chain margin accounts. We are contributor of erc7824.org and looking for comments on our initiative. State Channels are a very powerful way to scale dApps in a chain agnostic way. Yellow leverage it to make trading fully non-custodial, cross-chain and infinitely scalable.Prizes
📱 Best Use of ERC-7824 and Nitro Protocol ⸺ $10,000
🥇
1st place
$4,000
🥈
2nd place
$3,000
🥉
3rd place
$2,000
🏅
Best App Ideas
$500 ×2
Yellow invites developers to explore the capabilities of ERC-7824 and the Nitro Protocol, utilizing the Nitrolite SDK to build innovative applications.
Qualification Requirements
- Integrate Nitrolite SDK: Demonstrate the use of ERC-7824 in facilitating state channel mechanisms within your application - Provide a Working Demo: Submit a functional demonstration of your application, showcasing the integration - Open Source Your Code: Ensure your project’s codebase is publicly accessible for evaluation
About
The Ethereum development environment for professionals by Nomic Foundation. Give the Hardhat 3 alpha a try: Rust rewrite, Solidity tests, multi-chain, and more.Prize details coming soon
About
Beraborrow is the leading collateralised debt position (CDP) protocol on Berachain, unlocking instant liquidity through Nectar ($NECT), the first stablecoin powered by Proof of Liquidity. Designed for simplicity and flexibility, Beraborrow features modular, tokenized components that can be composed together to introduce powerful new features to the CDP design space.Prize details coming soon
Resources
About
We drive breakthroughs in computing to push humanity forward.Prizes
📁 Build Fair Data Economy with Filecoin ⸺ $5,000
🥇
1st place
$2,500
🥈
2nd place
$1,500
🥉
3rd place
$1,000
🗂️ Design AI systems that are trustworthy, ethical, and sustainable by tackling data provenance, ethical sourcing, and fair attribution.
🗂️ Leverage Filecoin’s decentralized storage and Data DAOs to ensure transparency, privacy, and equitable value distribution.
🗂️ We're seeking modular, interoperable, and agentic solutions across data management, decentralized computation, and real-world applications.
Qualification Requirements
Projects must store data on Filecoin using on-chain storage deals or approved on-ramp providers such as Akave, Lighthouse Storage, or Storacha. Note: Storing solely on IPFS does not qualify. Solutions can be deployed on the Filecoin Virtual Machine (FVM) or on EVM-compatible Layer 2 networks that facilitate cross-chain storage to Filecoin. Additional credit will be given to projects that integrate with a data on-ramp contract to streamline storage onboarding to Filecoin from other EVM-compatible chains.