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ETHDam III 

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Welcome to our 3rd Edition of ETHDam! 
48h IRL hackathon, dedicated to Privacy, Security & AI 😎

Registration

ETHDam Online Bootcamp - Circles Workshop 

ETHDam Online Bootcamp - Oasis Workshop 

IRL Hacker Speed Dating

Hackathon Begins

Hackathon Ends

Hackathon Judging 

OtterTrack Pitches

Closing Ceremony

timeline

Hacking, rules and submission⚠️ The hackathon starts on Friday May 9th at 10:00 CET⚠️ The submission deadline through the TAIKAI platform is May 11th at 10:00 CETETHDam Hacking Rules 📜<ul><li>ETHDam is happening IRL </li><li>You cannot copy, use or submit another team's source code;</li><li>The decision of judges is final in the determination of prizes and awards;</li><li>Bounties are in the hands of our hackathon partners, which need to reward all hackers max 2 weeks after ETHDam; </li><li>All code for projects must be written during the event, there can be no previously written code submitted to the judging process;</li><li>All participants must hold a valid hacker ticket for ETHDam for their submission to be considered;</li><li>Please comply with all instructions provided by ETHDam organizers and volunteers, and respect our Code of Conduct</li></ul>Minimum requirements to be judged   <ul><li>A link to the open-source code;</li><li>A short demo video and/or presentation to describe the goal and use case of your project and to be used during the Pitches;</li><li>If applicable, the contract address(es) and/or website urls of your deployed demo/presentation must be provided, either on a testnet of your choice or mainnet of a platform of choice </li></ul>The Otter Track  🦦Otter Track is dedicated to existing projects. During the hackathon, you must add a feature, giving you the chance to present a polished project on the main stage. <ul><li>1 member needs to be present in person to present on the main stage, Sunday April 14th</li><li>There are no bounties for this track</li><li>Submit project to be selected in the OtterTrack </li><li>To apply an Otter Track Project you need to:Apply as a hacker here on TaikaiProvide more info about the project <a href="https://docs.google.com/forms/d/e/1FAIpQLSdmatI7XPZjbEAK51NWHFUQwX1BvQ4JiPbV14RvDlrRoVArXw/viewform" target="_blank">https://docs.google.com/forms/d/e/1FAIpQLSdmatI7XPZjbEAK51NWHFUQwX1BvQ4JiPbV14RvDlrRoVArXw/viewform</a> </li></ul>Privacy, Security and AI Tracks 🔒💰<ul><li>You will also find bounties from our sponsors Bounties: 20K from Oasis, 10K Circles (supported by Gnosis) </li></ul>Submission Guidelines 📝You have to create your project on TAIKAI for submission before Sunday May 11th at 10:00 ⚠️. Every team should have at least one member present at the venue by submission time in order to present their project.To create a project in TAIKAI follow this steps:<ul><li>Use the "Create Project" button</li><li>Add your team members</li><li>To select the track and bounties you are applying, modify the categories of the project.</li><li>Edit the project. Be sure to follow the Submission Template (scroll to the bottom of this page to see it)</li><li>Publish the project with the "Publish" button</li></ul>Submission Template 📤<ul><li>PROJECT NAME &lt;Replace this line with your content here&gt; </li><li>DESCRIPTION OF THE PROJECT (2 lines) &lt;Replace this line with your content here&gt; </li><li>DISCORD AND TELEGRAM USER NAME (team contact to share the judging details) After submission, this person should be constantly checking discord for updates &lt;Replace this line with your content here&gt; </li><li>REPOSITORY WITH PROJECT'S CODE &lt;Replace this line with your content here&gt; </li><li>VIDEO DEMO (90 seconds max) OR PRESENTATION (5 slides max) A video or a presentation to showcase your project. &lt;Replace this line with your content here&gt; If you upload a presentation please link a google drive address - make sure it's public </li><li>The contract address(es) or website URLs of your deployed application, either on a testnet of your choice or mainnet of a platform of choice. 📂📂 (NOT mandatory) &lt;Add your content here&gt;</li></ul>

rules

🏆- Best Privacy - Best Security - Best AI- Top 10 Bounties 40k- Oasis 20K - Circles 10KWe’re pleased to announce that the Acronym Foundation is joining to support our ETHDam hackers. The top 10 hackathon projects will each receive 1k in recognition of their work.Acronym Foundation — 10k (10 × 1k for top 10 projects) Bounty description for ETHDam III - OasisAboutOasis is home to Sapphire, the world's first confidential EVM network using the Trusted Execution Environment (TEE), the Oasis Privacy Layer (OPL), a cross-chain privacy solution that can be used by any third-party EVM chain, and ROFL, a framework that adds support for confidential off-chain compute. Oasis is an L0/1 blockchain built to support confidential compute for applications at scale, with a unique layered architecture that presents the optimal building and execution environment for DeFi, AI, RWAs, Gaming, NFTs, DAO governance, and more.<ul><li>Track 1: Build a ROFL app (12.5k)</li></ul>1st place - 5k2nd place - 3k3rd place - 2k4th place - 1.5k5th place - 1k What to buildROFL (Runtime Off-chain Logic) apps run in TEE. They rely on Sapphire for registration, billing, managing the virtual machine and storing secrets/configuration. The execution inside ROFL however, is done completely off-chain, so they are perfect for compute-intensive and/or 24/7 services such as secure decentralized oracles, bridges, AI agents, LLM chatbots and more. Redundancy is possible with native support for replicas. Apps running inside ROFL can also access its key-management service which enables Sapphire smart contracts to verify that the transaction was really signed from within the TEE (earn extra points!). If you design, build and deploy a new ROFL app you qualify for the Build a ROFL app track. <ul><li>Track 2: Build on Sapphire (3.5k)</li></ul>1st place - 2k2nd place 1k3rd place - 500 What to buildOasis Sapphire unlocks opportunities for developers via a familiar EVM development environment with added on-chain privacy. Sapphire runs inside TEE and assures both the confidential smart contract state and EVM transactions and queries are encrypted. Sapphire clients are available in different programming languages (TypeScript, Python, Go, Rust) and frameworks (ethers, hardhat, wagmi, viem, foundry, web3py). Build an application that uses unique Sapphire confidentiality features to qualify for the Build on Sapphire track.<ul><li>Developer feedback (2k), distributed proportionally </li></ul>Opening an issue or a PR at https://github.com/oasisprotocol, helping, discussing and sharing thoughts at #dev-central Oasis Discord channel.<ul><li>Pool (2k), distributed equally to all Oasis bounty hackers </li></ul>It’s not all about winning! All hackers who submit a project for an Oasis bounty qualify for this prize pool. Judging Criteria<ul><li>Potential Impact: How big an impact could the project have?</li><li>Confidentiality: Does the project utilize the unique capabilities of ROFL and/or Sapphire to solve an important problem?</li><li>UX: Does the design make the user experience seamless?</li><li>Innovation: How well does the project combine or extend ROFL and/or Sapphire with technologies that weren’t used before?</li><li>Implementation Quality: Submitted code is working and uses Oasis tooling correctly.</li><li>Bonus ROFL-Sapphire integration points: Your dApp uses the Sapphire’s roflEnsureAuthorizedOrigin subcall in Solidity to assure that confidential data never leave ROFL</li></ul> Qualification Requirements- Demo video up to three minutes long- A text description explaining the features and functionality of your project- An open-source Github repository with a complete README- A way to test the project, including a link to the app or testing instructions- Complete the submission form by the final deadline Ideas to Get StartedAI AgentsWith Sapphire, you can store agent private keys on-chain and then build logic within a smart contract, and with ROFL, you can verify offchain agent workloads, in order to pursue use cases in trading, admin, security, wallets, collaborative art, etc.Oasis provides you all the tools to build truly autonomous and trustless agents. Generate private keys from within a TEE, store secrets on the Confidential EVM and let your agent loose on socials or DeFi dApps. Trustless Oracles Because the ROFL framework enables verifiable and confidential off-chain computation with internet access to web2 and web3 APIs, governed by the policies stored on-chain, there’s no need to trust the Oracle operator for fetching the price quotes and much more. You can even submit transactions to other chains.  DeFiPrivacy-preserving applications around dark pools, cross-chain liquidity, dutch auctions for tokens, ICO price discovery via auctions, DEX &amp; cross-chain swaps, and more! GamingBreak the link between in-game profiles and on-chain accounts, create trustless, hidden fog of war mechanics, explore the agent-gaming design space, all to build captivating games! OtherAccount abstraction and gasless wallets. Trustless cryptography with confidential contracts. Applications for encrypted metadata, secrets, and key management. Resources<ul><li>Oasis Cheatsheet </li></ul>https://drive.google.com/file/d/1Ab1mt-tYi5J72xcylB3OlwfpFGfd-NdU/view<ul><li>Technical Workshop — Understanding the Oasis Privacy Layer</li></ul>https://www.youtube.com/watch?v=gD-_cgV3Nz4 <ul><li>Sapphire 101: Working with a confidential EVM</li></ul>https://www.youtube.com/watch?v=c_N8edT41-Q <ul><li>Oasis Testnet Faucet (extra TEST tokens for ROFL developers on-demand)</li></ul>https://faucet.testnet.oasis.io/ <ul><li>Oasis ROFL Framework</li></ul>https://docs.oasis.io/rofl/ <ul><li>Oasis Sapphire Paratime (EVM Compatible)</li></ul>https://docs.oasis.io/dapp/sapphire/ <ul><li>Oasis Social Media Channels</li></ul>https://docs.oasis.io/get-involved/ <ul><li>Oasis Network Documentation</li></ul>https://docs.oasis.io/ <ul><li>Demo Dapp</li></ul>https://github.com/oasisprotocol/demo-chat <ul><li>Oasis Github (Sapphire)</li></ul>https://github.com/oasisprotocol/sapphire-paratime  Bounty description for ETHDam III - CirclesAbout CirclesCircles is a decentralised currency protocol designed to create a more equitable and accessible form of money. Unlike traditional fiat or even other cryptocurrencies, Circles distributes the ability to issue money equally across participants, ensuring that no single party, including early adopters, are at an undue advantage.Circles achieves this by:<ul><li>Allowing every participant to create their own personal token (CRC) at a fixed rate of 1 CRC per hour</li><li>Imposing a 7% demurrage rate to prevent wealth concentration and ensure that new participants can build up meaningful value</li><li>Using trust connections within the network to enable peer-to-peer transactions without reliance on central banks or financial intermediaries</li><li>Supporting the formation of Groups - collective networks that issue their own CRC, enabling localised economic coordination and shared-interest projects.</li></ul>Circles creates a monetary ecosystem where value is determined by social trust rather than institutional control. Its decentralised design ensures that no single party benefits disproportionately from early adoption or control over supply.About Circles SDKCircles SDK is a TypeScript toolkit for building decentralized applications on the Circles protocol. It enables developers to seamlessly integrate Circles user profiles, as well as personal and group currencies, fostering new models of collaboration, connectivity, and decentralized value exchange.The SDK simplifies the management of ERC-1155-based personal and group tokens, supporting transitive transfers along trust networks. Additionally, it provides functionality to wrap these tokens into ERC-20 tokens, making them compatible with broader DeFi ecosystems such as CowSwap.The SDK supports creating and managing trust connections, setting up user profiles, and generating avatars, including personal, group, and organizational avatars. It also enables on-chain data querying and integrates with multiple wallet providers, such as browser wallets and Safe Wallet. Built on Gnosis Chain, Circles SDK ensures low fees, fast transactions, and a secure, scalable infrastructure for community-driven financial ecosystems. Bounties Details - $10K in totalBest innovative dApp using Circles SDK 🏆Up to $2000 (1 project will win)Build the most impactful dApp using Circles SDK and win up to $2,000!This open track rewards the best project that leverages the Circles protocol to solve real-world problems. The prize will be awarded based on the strength of the problem statement and the effectiveness of the solution built on Circles. Community focused dApps using Groups🏆$2000 split between 2 projects Build governance tooling, DAOs, or innovative group-based dApps that empower communities through Circles Groups. Utilize base groups functionality to create custom conditions for group members.Project example : https://ethglobal.com/showcase/grassroot-datadaos-kw3xdSocial platform (or social networking) dApps personal avatars(and more)🏆$2000 split between 2 projects Create mini dApps for Telegram, social networking, or identity-focused platforms using Circles SDK. Leverage personal avatars to build engaging, decentralized social experiences. Project example : https://dorahacks.io/buidl/23365 AI Agents x Circles SDK🏆$2000 split between 2 projects Integrate AI agents, such as the Eliza framework on Gnosis Chain, to build smart, autonomous applications that interact with Circles SDK or Circles contracts. Make marketplaces application to offer services against Circles and using CRC as payments token using Circles SDK🏆$2000 split between 2 projects Develop marketplace applications where people, groups, and organizations interact in new ways. Organizations act like digital vending machines, able to receive CRC and execute custom logic—unlocking new commerce models. For instance, creating vouchers against fixed CRC tokens.

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HACKATHON FAQDelighted to welcome you as a hacker for our 3rd edition of ETHDam, taking place this 9-11May, 2025, in Amsterdam at Pakhuis de Zwijger. We’ve put together this guide to help you navigate through the logistics, the events and quirks of this conference and hackathon. 👉 ETHDam 2025 Hacker Handbook <a href="https://small-hickory-732.notion.site/ETHDam-III-Hacker-Handbook-1917fc51155e8071bcd2c5befa21e2a9#1917fc51155e805ca8b3c6fd35f6602b" target="_blank">https://small-hickory-732.notion.site/ETHDam-III-Hacker-Handbook-1917fc51155e8071bcd2c5befa21e2a9#1917fc51155e805ca8b3c6fd35f6602b</a> LOGISTICSPlatform Two platforms to answer all your questions, and ensure a smooth hackathon for all. <ul><li>Taikai - where all hackers must register and submit their projects </li><li>Discord - to chat with the team and ping mentors</li></ul>Tickets <ul><li>Hackers do not need to purchase a ticket </li><li>Hacker need to apply via Taikai and will be approved in waves, every 2 weeks </li><li>Once approved, hackers will be able to redeem their free hacker ticket on Moongate </li><li>Regular attendees need to purchase tickets via Moongate </li></ul>Location address Pakhuis de Zwijger: Piet Heinkade 179, 1019 HC Amsterdam Sleeping at the venueYes, hackers can spend the night at the venue on Friday and Saturday night, don’t expect anything fancy. We will transform the 2nd stage (5th floor) on both nights, into a chill space for you to rest between intense coding sessions. No showers available. Pack a toothbrush, deodorant and a sleeping bag.On the ground floor, you can find lockers to safekeep your belongings, a 2EUR coin is required (it is returned to you once you are done using it).P2p housing - <a href="https://docs.google.com/spreadsheets/d/11HkH_efBdGZ8acJZ81FMbVL2bzncB-Ddo6GWmmc9zbg/edit?gid=0#gid=0" target="_blank">https://docs.google.com/spreadsheets/d/11HkH_efBdGZ8acJZ81FMbVL2bzncB-Ddo6GWmmc9zbg/edit?gid=0#gid=0</a> You might prefer to have your own crib, and want to couch surf with the locals? Then head to our P2p housing sheet and fill out your details. Fooooooooood 😋Breakfast, lunch and dinner are provided for the hackers. Amsterdam City Guide <a href="https://ethdam.substack.com/p/ethdam-amsterdam-city-guide" target="_blank">https://ethdam.substack.com/p/ethdam-amsterdam-city-guide</a> We’ve put together this little Amsterdam City Guide to help you make the most of your stay in this city! 🎟️ Exclusive Hotel Discount for ETHDam HackersGet 20% off (up to €100 per booking) on stays so you can focus on building. Book from a selection of 2.6 million hotels worldwide and use code ETHDAM25 at checkout (valid until May 12). Timeline: Monday, 5th of May18:00 - ETHDam Online Bootcamp - Workshop with Circles <a href="https://lu.ma/t4pfn7eq" target="_blank">https://lu.ma/t4pfn7eq</a>Tuesday, 6th of May17:00 - ETHDam Online Bootcamp - Workshop with Oasis <a href="https://lu.ma/t0wnugxa" target="_blank">https://lu.ma/t0wnugxa</a>Thursday, 8th of May16:00 - ETHDam IRL Warm Up - Hacker Speed Dating <a href="https://lu.ma/t4pfn7eq" target="_blank">https://lu.ma/t4pfn7eq</a>Friday, 9th of May10:00 - Hackathon BeginsSunday, 11th of May10:00 Hackathon Submissions in Taikai11:30 -15:30 Judging with Presentation schedule &amp; pitch at the various partner booths - bounties16:00 - 17:30 Top 10 Hackathon Projects17:30 Partners Bounties Winners17:45 Closing Ceremony What about the Conference? Recordings, photos and video <ul><li>All talks and panels will be recorded. We will also have a dedicated photographer. </li><li>If you don’t want to be photographed, mark yourself with our “no photography” sticker. </li></ul> THE HACKATHONRules <ul><li>The hackathon begins at 10:00 on Friday 9th of May and ends at 10:00 sharp on Sunday 11th of May. All projects must be submitted on Taikai.</li><li>Judging will take place on Sunday 11th of May</li><li>ETHDam is taking place IRL - all team members must be hacking in person </li><li>Team of max 5 people</li><li>You can not copy, use or submit another's team’s source code </li><li>All code must be written during ETHDam, do not submit code previously written </li><li>The judges decision are final in the determination of the prizes </li><li>Bounties are in the hands of our partners</li><li>All hackers must hold a valid ticket for ETHDam, to be claimed on Moongate </li><li>You must comply with all instructions provided by ETHDam organisers and volunteers, and respect our Code of Conduct </li></ul> Requirements<ul><li>Project / Team name.</li><li>Short description about the project.</li><li>1 Discord username for the team’s person of contact.</li><li>Repository with project’s code/ link to open source code </li><li>Video demo (90 seconds) and/or Presentation (5 slides max).</li><li>The contract address(es) or website URLs of your deployed application, either on a testnet of your choice or mainnet of a platform of choice (NOT mandatory) </li></ul>The OtterTrackThe OtterTrack is a special track during the hackathon dedicated to existing projects. <ul><li style="margin-left:36pt">Project must sign up via Taikai and fill in a separate form.</li><li style="margin-left:36pt">Projects must add at least one feature during the 48 hour hackathon</li><li style="margin-left:36pt">Present and pitch on stage a polished product on Sunday 14th of April</li><li style="margin-left:36pt">Only 1 member needs to be present in person</li><li style="margin-left:36pt">There are no bounties for this track, they are competing for glory and looking for future investments.</li></ul> Mentors and Judging All mentors are present in person and online, via Discord  to support the teams throughout the hackathonThe judging will take place on Sunday 11th of May in the afternoon The judges will rate all projects from 1 to 5 on these 5 criterias<ol><li>Technical - "How technical was this to build?"</li><li>Use Case - "Is this solving a problem?"</li><li>Value proposition - "How unique and innovative is this project?"</li><li>Market/business - "Is this interesting for investors? Are the the business model and token economics are appealing?"</li><li>Wow factor - "This project is completely out of the box, blew your mind"</li></ol> Bounties, Total 40k: 20K from Oasis, 10K Circles (supported by Gnosis) We’re pleased to announce that the Acronym Foundation is joining to support our ETHDam hackers. The top 10 hackathon projects will each receive 1k in recognition of their work. Acronym Foundation — 10k (10 × 1k for top 10 projects) ETHDam Hackathon TeamJames @theref_eth

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results

Welcome to the 3rd Edition of <a href="https://www.ethdam.com" target="_blank">ETHDam</a>, hosted this May 9-11 2025 in <a href="https://www.google.com/maps/place/Pakhuis+de+Zwijger/@52.3767651,4.9195517,16z/data=!3m1!4b1!4m6!3m5!1s0x47c609a80e2c8a2f:0x2d9e404fc8f71f8d!8m2!3d52.3767651!4d4.9221266!16s%2Fg%2F11h1t_cfk?entry=ttu&amp;g_ep=EgoyMDI0MTEwNi4wIKXMDSoASAFQAw%3D%3D" target="_blank">Amsterdam</a> to bring together the best Privacy, Security &amp; AI builders in crypto for a 48-hour hackathon and conference combo!  ETHDam III <ul><li>ETHDam Online Bootcamp </li><li>Hacker Speed Dating </li><li>Otter Track for seasoned builders - <a href="https://forms.gle/rWbBroHPuhhAwANV6" target="_blank">Apply</a></li><li>2 conference stages</li></ul> The hackathon 🏆<ul><li>Best Privacy </li><li>Best Security </li><li>Best AI </li><li>Top 10 </li></ul>Bounties (40k)<ul><li>Oasis 20K </li><li>Circles 10K</li></ul>We’re pleased to announce that the Acronym Foundation is joining to support our ETHDam hackers. The top 10 hackathon projects will each receive 1k in recognition of their work.<ul><li>Acronym Foundation — 10k (10 × 1k for top 10 projects)</li></ul>

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