ETHGlobal Prague

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!

Qualifications

Use Blockscout and show Blockscout in your presentation. Update links to make Blockscout the primary explorer for your app and users.

Serve data to your app with Blockscout APIs or modify Blockscout itself by adding new frontend features, styles or stats. Show us what you’ve got, the more impressive the Blockscout usage the better!

Qualifications

To win this prize you'll need to use Blockscout as more than a primary blockchain explorer. See our full set of developer APIs, SDKs, and services to ideate what you can build powered by Blockscout.

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!

Qualifications

To win this prize you need to use the new Blockscout SDK in a relevant way inside your project.

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!

Qualifications

To win this prize you need to use the Blockscout Merits REST API in a relevant way inside your project.

Build an extension for 1inch Cross-chain Swap (Fusion+) that enable swaps between Ethereum and a non-EVM chain. 1inch Cross-chain Swap (Fusion+) is our novel implementation of cross-chain swaps using escrows. Any chain that supports escrow functionality is a candidate for a 1inch Cross-chain Swap (Fusion+) integration.

Qualifications

Requirements: - Integration of one new chain into the 1inch Cross-chain Swap (Fusion+) ecosystem (command line script for the implementation is perfectly fine, no UI needed) - Fully functional 1inch Cross-chain Swap (Fusion+) swap between Ethereum and a non-EVM chain - Demonstrates handling of execution guarantees and refund logic - Proper Git commit history (no single-commit entries on the final day) Judging criteria: - UX simplicity and abstraction - Security and reliability of the flow - Code quality/completeness - Documentation quality

Build advanced strategies and hooks for the 1inch Limit Order Protocol. Project ideas: - Develop an options hook - Integrate concentrated liquidity - TWAP swap - Other creative projects are welcome Existing examples built on top of Limit Order Protocol include ranged sells and dutch auctions (links in hackathon documentation)

Qualifications

Requirements: - New functionality built on top of Limit Order Protocol (command line script for the implementation is perfectly fine, no UI needed) - Proper Git commit history (no single-commit entries on the final day) Judging criteria: - Innovation and originality - Code quality/completeness - Documentation quality

Utilize 1inch's infrastructure to help build your application - Build with our swap protocols (1inch Cross-chain Swap (Fusion+), Intent-based Swap (Fusion), Classic Swap, limit order protocol) - Build with any of our data APIs (price feeds API, wallet balances API, token metadata API, and many more) - Use our Web3 API to interact with the blockchain

Qualifications

Requirements: - Your project uses at least one 1inch API to provide meaningful functionality for your users - Proper Git commit history (no single-commit entries on the final day) Judging Criteria: - Practicality and usefulness - Code quality/completeness

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.

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.

Qualifications

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.

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!

Qualifications

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.

Use protocols on Flare blockchain in an innovative and world changing way! 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, * Flare’s Secure Random Number Generator, or * FAssets to build dApps that use FXRP (synthetic XRP on Flare) bringing non-smart-contract XRP into DeFi.

Qualifications

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.

Most innovative external data source use case or most innovative cross chain application secured by Flare’s protocols.

Qualifications

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.

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.

Qualifications

• Deploy a smart contract or run transactions on Flow Testnet or Flow Mainnet

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.

Qualifications

• Deploy a smart contract or running transactions on Flow Testnet or Flow Mainnet • Your submission must showcase a meaningful cross-chain DeFi use case

Build innovative applications, agents, tooling, or infrastructure that combine AI/ML (including LLMs and autonomous agents) with Hedera network services. The focus is on demonstrating novel AI‑blockchain integrations that create real utility for developers or end‑users.

Qualifications

A submission must: Hedera Deployment – Deploy Web3 components on Hedera Mainnet, Testnet, or Previewnet and utilise at least one Hedera service: Smart Contracts (EVM), Token Service, Consensus Service, Scheduled Transactions, or Mirror Node. AI Integration – Incorporate AI in a material way — e.g. LLMs, machine‑learning models, or multi‑agent systems. Open Source – Provide all source code in public GitHub repo(s) and verify any smart contracts on Hashscan. Demo Video – Include a demo video (≤ 5 minutes) explaining what was built and how to run it. Optional enhancements earn extra points: Using multiple Hedera services. Leveraging the Hedera Agent Kit or contributing new plugins/tooling for frameworks such as Eliza, LangGraph etc. Judging Criteria Innovation – originality of the idea Feasibility – technical viability Execution – completeness & code quality Integration – depth of Hedera usage Validation – market/user potential Impact – contribution to Hedera metrics (accounts, TPS, etc.) Pitch – clarity and persuasiveness of presentation

Build and deploy innovative EVM‑based applications on Hedera, leveraging the Hedera Smart Contracts Service alongside key ecosystem tooling such as Chainlink, Chainlink CCIP, Pyth, LayerZero, HashPort, or HTS system contracts. Extra credit is given for incorporating additional Hedera native services.

Qualifications

A submission must: Hedera Deployment – Deploy smart contracts on Hedera Mainnet, Testnet, or Previewnet using the Hedera Smart Contracts Service (EVM). Integration – Integrate at least one of the following: Oracles (Chainlink, Pyth, Supra, etc.) Bridges (LayerZero, HashPort, Chainlink CCIP) HTS System Contracts for token creation/management Hedera‑native wallet flow (HashPack, Kabila, Blade, MetaMask Snap) Open Source – Provide source code in public GitHub repo(s) with contracts verified on Hashscan. Demo Video – Include a ≤ 5‑minute demo video showing functionality and setup. Optional enhancements that boost your score: Use multiple Hedera services (HTS, HCS, Scheduled Txns, Mirror Node, etc.). Employ open‑source tooling that improves the Hedera EVM developer experience. Judging Criteria Innovation – novelty of solution Feasibility – real‑world viability Execution – code quality & completeness Integration Depth – sophistication of Hedera usage Validation – user/business potential Impact – contribution to Hedera KPIs (accounts, TPS, TVL, etc.) Pitch – clarity and persuasiveness of demo

Overall winner is the best project out of both AI and EVM tracks. AI Track Extras: Hedera Agent Kit · HCS‑10 (OpenConvAI) · HIP‑991 · Eliza plugin examples. EVM Track Extras: HTS System Contracts Guide · Chainlink + CCIP · LayerZero · Pyth Network · Contract verification guide. See more resources for specific tracks on their respective bounty pages

Qualifications

1. AI & Agents Track Goal: Build applications, agents, tooling, or infrastructure that combine AI/ML (LLMs, multi‑agent systems, etc.) with Hedera services. Core Requirements Hedera Deployment: Use ≥ 1 Hedera service (EVM, HTS, HCS, Scheduled Txns, Mirror Node). Material AI Integration. Open‑source code & Hashscan‑verified contracts. ≤ 5‑minute demo video. 2. EVM Builder Track Goal: Build and deploy innovative EVM dApps on Hedera Smart Contracts, integrating key tooling (Chainlink, CCIP, Pyth, LayerZero, HashPort, HTS system contracts). Core Requirements Hedera Smart Contracts (EVM) deployment. Integrate ≥ 1 of: oracles • bridges • HTS system contracts • Hedera‑native wallet flow. Open‑source code & Hashscan‑verified contracts. ≤ 5‑minute demo video. Optional for both tracks → extra points: use multiple Hedera services, contribute new open‑source tooling. Judging Criteria (applies to both tracks) Innovation Feasibility Execution & Code Quality Integration Depth (Hedera usage) Validation / Market Potential Impact on Hedera KPIs (accounts, TPS, TVL) Pitch Quality

Use Pyth Pull oracle to power up you dapp. The prize will go to the top three teams with best and most innovative use of Pyth Price feeds. Please read the qualification requirements carefully.

Qualifications

Qualification Requirements Your app should use Pyth price feeds via Pull method. The steps include. 1. Pull/Fetch the data from Hermes. (Check the links and Resources) 2. Update the data on chain using updatePriceFeeds method 3. Consume the price. 4. You can run a price pusher to if you prefer traditional way of using oracles. Please follow our comprehensive Pyth EVM guide to to integrate Pyth in less than 5 minutes.

Use Pyth Entropy to generate and consume random number on chains. Anyone can permissionless generate random number on-chain. This pool prize will be given to most Innovative apps to use Pyth Entropy.

Qualifications

Your app should consume random number generated by Pyth. Please follow along the guides and Tutorials to get started.

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

Qualifications

-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.

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

Qualifications

- 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.

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

Qualifications

- 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.

Show us your best Mini Apps! Projects that build and deploy a Mini App using MiniKit are eligible for this prize.

Qualifications

- 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

Yellow invites developers to explore the capabilities of ERC-7824 and the Nitrolite Protocol, contributing or utilizing to the Nitrolite SDK

Qualifications

- Integrate Nitrolite SDK: Demonstrate the use of ERC-7824 in facilitating state channel mechanisms within your application - Or contribute improvements, issue resolution to the protocol repository nitrolite and clearnode - 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

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

Qualifications

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.

Show how emails can be used on-chain. Examples: - Controlling AA wallet with email - NFT airdrop for people owning certain email domain

Qualifications

The application must use Email Proofs, as well as incorporating both Prover and Verifier contracts.

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

Qualifications

The application must use Time Travel OR Teleport, as well as incorporating both Prover and Verifier contracts.

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

Qualifications

The application must use Web Proofs, as well as incorporating both Prover and Verifier contracts.

🗂️ 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.

Qualifications

1. Projects must store data on Filecoin through on-chain storage deals, by using the hot storage layer - Akave or on-ramp storage providers such as Lighthouse Storage, or Storacha. 2. Storing solely on IPFS does not qualify. 3. Solutions can be deployed on the Filecoin Virtual Machine (FVM) or on EVM-compatible Layer 2 networks that facilitate cross-chain storage to Filecoin. 4. 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 or building a data bridge from Akave to Filecoin where data flow works fully on-chain.

Create a vault strategy on Beraborrow that automatically manages a CDP. Let users “set it and forget it”—but optimize for sustainability, yield, risk, and usability. Our product, Managed Leveraged Vaults (MLV), keeps the position collateral ratio constant, while depositing the debt into our LSP, and rebalancing PoL rewards into principal.

Qualifications

- Projects must have a description and a GitHub repository with a descriptive README. - As ERC4626 compliant as possible. - Technically and economically sound. - Deployed smart contracts over any Beraborrow collateral. - Deploy $NECT debt into multiple productive uses and not just LSP (It can complement but not anchor the strategy). Examples: - Delta neutralising the collateral while earning PoL rewards above interest rates. - Debt yield optimization.

Liquid Stability Pool offsets the debt of liquidations in our CDP module, we believe we can bring higher capital efficiency to the $NECT sitting there by having other protocols (Perpetuals, Lending…) making use of that available liquidity, with the condition that it ends up being profitable to LSP holders. Develop a module that can plug into the `LiquidStabilityPool::offset()` function, ensuring that any other protocol can make use of its liquidity, without introducing any liquidity problem.

Qualifications

Qualification requirement: - Projects must have a description and a GitHub repository with a descriptive README. -- How your module safely leverages LSP liquidity. -- Why it's beneficial to both protocols and LSP depositors. - There has to be at least one practical example of a known protocol making a sound use of your developed module that plugs into the LSP. - Technically and economically sound. - Code must be open source and modular enough to plug into future protocols. - Berachain smart contract deployment. Examples: - Lending liquidations (Aave, Dolomite) - Perpetuals liquidations (GMX, Hyperliquid…)