**ETHGlobal's flagship online event is back**: The idea for the first ETHOnline formed out of sheer necessity. As we were forced to take a break from in-person events back in 2020, we raced to create a virtual equivalent that could inspire the same magical feeling.

Three years later, **ETHOnline 2023** has grown into one of the most exciting events on our calendar, anticipated by hackers all over the world.

ETHOnline is a three week long online hackathon with over **$200,000 USD** in prizes as well as a **series of curated summits**, celebrating some of the most significant happenings & learnings from the past 12 months in web3. **Apply now to be a part of it!**


ETHOnline 2023

America/New_York

Rory Arredondo

ETHGlobal

Kartik Talwar

Co-founder

Marcus Rein

Edge & Node

Scroll

Optimism

**Build with Spark!**

- Best use of Conduits 🚇 
🥇 4,000 
🥈 2,000 
🥉 1,000

- Best use of sDAI 💸 
🥇 4,000
🥈 2,000
🥉 500

- Best use of SparkLend 🌳 
🥇 4,000
🥈 2,000
🥉 500

MakerDAO

Axelar

Mask Network

ZM builders, we’re challenging you to hack with Polygon solutions to solve real-world problems.

### **🔀 $2,500 Best use of zkEVM**

The Polygon zkEVM launched earlier this year, it's grown to hold a TVL of $50 million and continues to attract major protocols. For this challenge, we want to see your most innovative use of the Polygon zkEVM, this is an open challenge that will see the most innovative and deserving protocols, with killer UX carry the day!

Check out these resources to get you started.

*   [Documentation](https://zkevm.polygon.technology/docs/develop)
*   [Full Stack dApp demo](https://zkevm.polygon.technology/docs/develop)

========================================

### **❌ $2,500 LxLy Bridge zkEVM Extension**

At the heart of Polygon’s new 2.0 architecture lies the LxLy bridge. The Polygon zkEVM LxLy Bridge facilitates cross-chain communication across Polygon chains. We’re challenging you to create and extend the LxLy sample implementations and add support for different types of cross-chain messaging and assets transfer of custom ERC-20s and any other EIP/ERC you see fit such as ERC1155 etc. Check out the existing [code samples](https://github.com/0xPolygonHermez/code-examples) and open a PR with your own contribution that facilities cross-chain communication.

*Cross-Chain ideas from the Polygon zkEVM team*

*   Claim UI: Build a Dapp to allow users to connect and see all valid messages they have that are claimable on a given LxLy chain (Polygon zkEVM etc) and claim them!
*   Implement an [OpenZeppelin Governor](https://docs.openzeppelin.com/contracts/4.x/governance#governor) that allows token holders to vote on Polygon zkEVM with proposals that are still on Ethereum or Polygon PoS Create a snapshot strategy that accounts for token balance on Ethereum, Polygon PoS, & Polygon zkEVM
*   Build a zkEVM NFT project with mint logic that depends on owning an asset on Ethereum or Polygon PoS
*   Permissionless Prover: A smart contract that allows Polygon Labs to put up a reward for anyone who fills in as permissionless prover for when our infra goes down essentially a contract that has a function that checks whether a given verifyBatches() call was successfully called by anyone other than our trusted address, and if so, pays out some fixed reward it holds (MATIC tokens)
*   Or even extend these repos to cover LxLy Bridging https://github.com/ZeframLou/universal-bridge or <https://github.com/aave/governance-crosschain-bridges/tree/master/contracts/bridges>

========================================

### **🆔 $2,500 Best use of Polygon ID's Verifiable Credentials to preserve user privacy**

Self-Sovereign Identity is the future. Use Polygon ID to represent identity-based information as [verifiable credentials](https://0xpolygonid.github.io/tutorials/#core-concepts-of-polygon-id-verifiable-credentials-identity-holder-issuer-and-verifier-triangle-of-trust) in your dapp so your users can prove access rights to dapp features without giving up their private data. Polygon ID is also excited to announce a brand new partnership with [Dock.io](http://Dock.io) that will allow you to securely extend the privacy of your Lens profile using Verifiable Credentials. Using Dock's REST API credentials can be issued a few API calls. Along with issuing credentials application developers can use the API to manage issuer profiles and create and import data schemas. Dock's tooling also supports non-developers through it's no-code solution Dock Certs which provides the same functionality via a web interface.

[This demo](https://github.com/docknetwork/polygonid-demo) shows you how to set up your Dock.io account and begin to issue VCs. Your task is to now leverage VCs to provide additional layers of privacy and security to your Lens Dapp.

*Polygon ID resources:*

*   [Polygon ID Dev Docs and tutorials](https://0xpolygonid.github.io/tutorials/)
*   How to run an Issuer to issue VCs: [Video](https://www.youtube.com/watch?v=19E-jLLRUO8\&feature=youtu.be) by Tony
*   [Fullstack VC-gated dapp template](https://github.com/oceans404/fullstack-polygon-id-vc-gated-dapp/tree/main) with everything you need for your KYCAgeCredential gated dapp by Steph
*   This demo shows you how to set up your Dock.io account and begin to issue VCs. Your task is to now leverage VCs to provide additional layers of privacy and security to your Lens Dapp.

*Ideas from the Polygon ID team:*

*   **Anonymous voting** - On-chain voting exposes the choices made by different public addresses. Create a hack that proves DAO membership with a VC while making sure members don’t double vote.
*   **Social proof of influence or activity** - Create a proof of influence issuer that issues VCs based on numbers of followers or number of posts across social platforms
*   **Bot protection** - Create a decentralized verification system providing individual VCs of liveliness & uniqueness that could be combined to prevent sybil attacks.

*Lens Ideas:*

*   **KYC:** Imagine if you can securely add KYC to your Lens dapp and be able to rely on the authenticity of that data
*   “**Lenster badges” from Polygon ID credentials:** Import a Polygon ID credential and create a [Lenster badge](https://www.notion.so/Lenster-badge-5bf35b1a253c4c2c9231932908c21658?pvs=21) from it (Proof of Hacker, Proof of Human, Polygon Activist,). You could combine these with any of the credentials from WIW or any of the [free credential issuers that use Polygon ID](https://www.notion.so/Polygon-ID-Public-Credentials-Issuers-98a1a0d8ae19414ca160e84506b357d6?pvs=21).

[Lenster badge](https://www.notion.so/Lenster-badge-5bf35b1a253c4c2c9231932908c21658?pvs=21)

========================================

### **🤝** $2,500 Best Public Good with Account Abstraction or Gasless transactions on Polygon

Create a permissionless public good dapp with an app-like UX by sponsoring your users’ gas fees using gasless transactions or by batching transactions into a single transaction. Learn more by reading up on [ERC-4337: Account Abstraction](https://eips.ethereum.org/EIPS/eip-4337) and Gasless transactions.

*Account Abstraction SDKs*

*   [Safe{Core} Account Abstraction SDKs](https://docs.safe.global/learn/safe-core/safe-core-account-abstraction-sdk) support Polygon PoS Mainnet and Polygon PoS Mumbai Testnet.
*   Biconomy’s [Gasless Transactions SDKs](https://biconomy.gitbook.io/sdk/introduction/overview) support Polygon PoS Mumbai Testnet with Mainnet and zkEVM networks coming soon.

In your project’s README, explain the UX optimization strategies you chose and link to relevant sections of code with your account abstraction implementation.


Polygon

Safe will be giving $10,000 for the best hacks using [Safe{Core}](https://safe.global/core).

To be eligible, developers must build with one of the following options:

[Safe{Core} Protocol](https://github.com/safe-global/safe-core-protocol-specs) (integrating or implementing any part of the Protocol). Check this demo app to get an overview of what can be done: https://github.com/5afe/safe-core-protocol-demo.

*   1st prize: $2,500
*   2nd prize: $1,500
*   3rd prize: $1,000

[Safe{Core} Account Abstraction SDK](https://github.com/safe-global/safe-core-sdk) (integrating at least one of the existing kits). Check this demo app to get an overview of what can be done: https://github.com/5afe/account-abstraction-demo-ui.

*   1st prize: $2,500
*   2nd prize: $1,500
*   3rd prize: $1,000


Safe

Prizes will be awarded to the best projects built on top of UMA's optimistic oracle, or the Across bridge.

*   🥇 First prize: **$5,000** in $UMA
*   🥈 Second prize: **$2,000** in $UMA
*   🏊 Pool Prize: **$3,000** in $UMA distributed between all qualifying submissions


🏆 Grand Prizes: 2 teams x $2500 (paid in FIL) 
🏊 Pool Prize: $5000, up to 10 teams, capped at $1000 per team (paid in FIL)

Challenge:

**🪄DWeb It: Best innovations that turn current web services and applications into more open, equitable, secure, and resilient. Using one or several decentralized technologies from Protocol Labs Network qualifies for this track.

Qualifying technologies: Filecoin, FVM (Filecoin Virtual Machine), Lilypad, IPC, Web3.storage, Saturn. Bonus points for building on FVM!**

For inspiration, project Categories Unique to the Filecoin Ecosystem:

💾 DataDAOs: Best DataDAOs and DAO tooling solutions built on FVM to enable curation, use, storage, analysis, monetization, and/or governance of valuable datasets.

💰DeFi: Best DeFi tools and services built on FVM to create value for FIL token-holders and 3500+ storage provider systems in the Filecoin Network.

🚀 Programmable Storages: Best solutions built on FVM to orchestrate, aggregate and broker storage for Data clients and 3500+ Storage Providers on the Filecoin network.

🔗 Tools, Infra & Bridging: Best tooling solutions built on FVM to make the Filecoin Storage Network more accessible and easy to use for developers across Web2 and/or Web3 ecosystems.

💻 Compute over Data with Lilypad: Best solutions to facilitate decentralized compute and/or AI and ML jobs. Build new solutions for DeSci, DAI, etc. or DApps that take advantage of the Lilypad decentralized computation network


Filecoin

**Browse hackathon ideas here:** [**Hackathon Success Guide**](https://www.notion.so/hyperlanexyz/Hackathon-Success-Guide-ba09d3ae19134ed496ac3f2d8953e5e4)

🥇**Top prize - $4,000 - Best use of Permissionless Interoperability**

To qualify to win this prize you simply need to deploy Hyperlane on a new blockchain or Rollup. Once deployed, how you utilize your new-found interoperability capabilities will dictate how likely you are to win the grand prize! Could you be the first one to bring Hyperlane to Scroll? Or Fuel? What about other chains participating in the hack? You could even deploy to your own chain! The most compelling submissions will be those that have built an application through their deployment. Additionally an extremely compelling Interchain Application that does not leverage a unique Hyperlane deployment can be eligible as well. See below for more ideas about Interchain applications.

🎼 $**2,000 - Best Interchain Application**

An interchain application is an app that communicates between chains, it either transfers assets or has interchain function calls. The winner of this prize would be the most compelling application that leverages Hyperlane, and benefits from its presence on multiple chains!

💸 $**2,000 - Best use of Hyperlane Warp Routes**

Warp Routes are Hyperlane’s unique take on token bridging. They are unique and instanced expression of bridging as opposed to the traditional omnibus token bridge design. Each Warp Route can have its own security model, using Hyperlane’s Interchain Security Modules. Perhaps most importantly, Warp Routes are completely permissionless! No one can stop you from bringing whichever asset you’d like to any chain you’d like.

So how can you win this prize? While the only strict requirement is that you use Warp Routes in your submission, the more creative you get with it the better!

🌐 $**2,000 - Write new Interchain Security Modules (ISMs)**

Hyperlane’s Modular Security Stack is premised on a variety of available Interchain Security Modules that developers can use to secure how applications can communicate between chains. While a few ISM’s are already available, and more are in the works, the hackathon is a great opportunity to build new ones.


Hyperlane

zkBob

## **Build on Mantle: $2,500 in MNT**

Eligible teams will split the pool prize(please check Submission Requirements!!!)

**Challenge Description:** Deploy your smart contract on Mantle (testnet or mainnet) and provide links to 1) smart contract on Mantle, and 2) a tweet to qualify. **Submission Requirements:** Link to your tweet about your project with @0xMantle mentioned Link to the smart contract on Mantle Explorer Link to GitHub **Judging Criteria:** Everyone who followed submission requirements is eligible.

## **Best Defi Project: $2,500 in MNT**

Split between 2 winning teams, $1,250 each.

**Challenge Description:** Create an innovative DeFi implementation (such as core protocol tools, ecosystem tools, use cases for NFTs and the Metaverse, DAOs, DeFi, and DApps) on Mantle. **Submission Requirements:** The submission must be deployed on Mantle testnet or mainnet (include a link to smart contract deployed on Mantle Explorer). A video demo and GitHub repo must be submitted. **Judging Criteria:** Originality and innovation in the implementation of DeFi on Mantle User experience and ease of use for DeFi-related interactions. Relevance and impact on the overall DeFi ecosystem Technical feasibility and implementation quality. Not plagiarized or recycled.

## **Best NFT or Gaming Project: $2,500 in MNT**

Split between 2 winning teams, $1,250 each.

**Challenge Description:** Build an NFT or web3 gaming-related project. **Ideas:** Read through the Game7 report and build a solution for one of the established challenges Improve wallet interactions for games. Using NFTs to represent a Compound/Aave position, or an ownership in a multisig. Allowing people to easily create and mint NFTs on Mantle testnet, where the image is uploaded to IPFS. **Submission Requirements:** The submission must be deployed on Mantle testnet or mainnet (include a link to smart contract deployed on Mantle Explorer). A video demo and GitHub repo must be submitted. **Judging Criteria:** Originality of the idea and innovation in the implementation of NFTs or Gaming tech/tools User experience and ease of use for NFT and/or gaming-related interactions. Relevance and impact on the gaming and/or NFT ecosystem Technical feasibility and implementation quality. Not plagiarized or recycled.

## **Best UX: $2,500 in MNT**

Split between 2 winning teams, $1,250 each

**Challenge Description:** One of the most challenging problems in Web3 is creating an intuitive and seamless User Experience for dApps. Build a dApp that raises the bar for blockchain UX. Make sure to explain in your submission in detail what you’ve done to make UX more accessible.

**Ideas:** Create a user-friendly mobile application or PWA Visualize Mantle address transaction history with a TikTok-like timeline.

**Submission Requirements:** The submission must be deployed on Mantle testnet or mainnet (include a link to smart contract deployed on Mantle Explorer). A video demo and GitHub repo must be submitted. **Judging Criteria:** User-friendly interface and intuitive design Innovative approaches to improve accessibility and seamless user experience. Relevance and impact on the overall Web3. UX Technical feasibility and implementation quality. Not plagiarized or recycled.


Mantle

**Best Integration:** Best use of ApeCoin in a dApp or application. This includes things like payments and gaming.

*   🥇 $3,000
*   🥈 $2,000

**Best Contribution:** Relates to tooling and experiences around using NFTs in games, phygital, or metaverse experiences. Should use ERC-6551, ERC-4337, ERC-6981 or another new ERC standard in its architecture. The ERC / project should benefit this community (i.e. wallet security, interesting NFT use cases, etc)

*   🥇 $3,000
*   🥈 $2,000


ApeCoin

*   🏆 Best overall use of Axiom $5,000.00
*   💡 Most creative use of Axiom $1,250.00
*   🥇 Best use of Axiom for on-chain identity and reputation $1,250.00
*   🥇 Best use of Axiom for DeFi $1,250.00
*   🥇 Best use of Axiom for on-chain incentivization $1,250.00


Axiom

Sismo

**$5,000 USD** to the single best integration of Compound III. The project must interact (smart contract or JSON RPC) with any instance of the v3 protocol or governance system, or be a supportive project specifically created for the Compound community's use.


Compound Grants

Connext

XMTP

**Best New Subgraph or Substream**: Build and deploy a custom subgraph that indexes data from a smart contract to query blockchain data to your dapp, or build a custom substream. 🥇 Grand Prize: $1400 🥈 1st Runner-up: $1000 🥉 2nd Runner-up: $600 **Best use of Subgraph or Substream**: Query a new or existing subgraph on the Graph Explorer or hosted service using the public query URL from the subgraph dashboard, or utilize a new or existing substream to process and consume web3 data. 🥇 Grand Prize: $1000 🥈 1st Runner-up: $600 🥉 2nd Runner-up: $400


The Graph


$2000
Wildcard - Pool prize - integrate Lit and use the latest Lit JS SDK V3

$3000
Best Use of Programmatic Signing with the Lit JS SDK V3

Lit Protocol

🏗 **$1,500 for the 2 best projects that use Chainlink CCIP or Chainlink Functions**

🛠️ **$1,000 for the 2 best projects that build something awesome with other Chainlink services**

Anything that came from the Chainlink Documentation counts, using Price Feeds, VRF, Automation, Chainlink Functions or Chainlink CCIP!

*   Chainlink Automation enables conditional execution of your smart contracts functions. Define the business rules, the trigger and what will happen.
*   Chainlink VRF is the verifiable, tamper-proof random number generator for blockchain gaming and NFT projects. Any smart contract can get random values without compromising security or usability.
*   Chainlink Proof of Reserve Feeds provides the status of the reserves for several assets in the same way as Price Feeds.
*   Chainlink NFT Floor Pricing Feeds provides a conservative and risk averse floor price estimate for an NFT collection.
*   Chainlink Data Feeds are the quickest way to connect your smart contracts to the real-world data such as asset prices, reserve balances, and L2 sequencer health.
*   Chainlink Functions can help you to build a dApp that pulls (or pushes) data connecting to an external API, this could be a public or private API, a SaaS app, any IoT device, or an enterprise system. In addition to off-chain data, it could utilize off-chain computations on the data as well (for example, aggregate data and put on-chain or connect to decentralized storage systems such as IPFS).
*   The Chainlink Cross-Chain Interoperability Protocol (CCIP) provides a single simple interface through which dApps and web3 entrepreneurs can securely meet all their cross-chain needs, including token transfers and arbitrary messaging.

You must use Chainlink to make a state change on the blockchain to be eligible.

**Nice to have:** how you use Chainlink in the project description.

It must be possible for the judges to find the Chainlink use in your code. Only the intention to use is not valid.

You must present your project for the Chainlink judges! Projects whose team does not present will not be evaluated.

✅ **We will look at the following criteria:**

*   UI/UX/DX - How useful is your application? Is it visually appealing?
*   Blockchain technology application - How valuable this project is for decentralization and adoption of Blockchain and Web3
*   Wow Factor - Anything not covered above! This is if you blow us away in some other way.

You can get started with any resources by checking out the [hackathon resources page.](https://docs.chain.link/docs/hackathon-resources?utm_medium=referral\&cnid=7ewfjg425mq6)

You’ll find:

*   The newest Chainlink CCIP [documentation](https://docs.chain.link/ccip)
*   Smart Contract Starter Tutorial
*   [Documentation](https://docs.chain.link?utm_medium=referral\&cnid=7ewfjg425mq6) for all the Chainlink features
*   Best practices utilized by top protocols like Aave and Synthetis
*   [Hardhat Starter Kits](https://github.com/smartcontractkit/hardhat-starter-kit)
*   [Brownie Starter Kits](https://github.com/smartcontractkit/chainlink-mix)
*   [Truffle Starter Kits](https://github.com/smartcontractkit/truffle-starter-kit)
*   [dApp Tools Starter Kit](https://github.com/smartcontractkit/dapptools-starter-kit)

More useful resources: [Chainlink Bounties Video](https://www.youtube.com/watch?v=20hyhIG7Si0)

[Chainlink Judging video](https://www.youtube.com/watch?v=nT07Ayr4dPw)

[Hackathon Resources | Chainlink Documentation](https://docs.chain.link/resources/hackathon-resources)


Chainlink

Push Protocol

Tableland

**$5,000 prize pool!**

1. **$2,000** for the best overall Noir application or library. 
2. **$2,000** for the best overall developer tool for the Noir ecosystem.
3. **$1,000** for the best overall Aztec Sandbox dapp.

*Depending on the prize breakdown, runner-ups may be eligible for prizes as well

Aztec

🎣 **Hookathon - $5,000** (Pool Prize)

Prizes will be awarded to the most innovative and unique hooks!

Project Ideas:
- Automated Position Managers: Design hooks that auto-adjust liquidity pool positions based on certain triggers or market conditions.
- User Experience Enhancers: Craft hooks that enrich the user experience, such as slippage protections or easy asset swapping features.
- Social Token Hooks: Allow actions to occur on Uniswap Pools dependent upon wether or not they hold certain tokens.
- Reduce LVR: Designs for opinionated MEV / LVR mitigation hooks.
- TradFi Adoption: Build hooks that enable better TradFi adoption.


Uniswap Foundation

Cometh

Idea Brainstorming & Team Formation Session

Deadline to Apply

Pre-Event

ETHOnline 2023 Kickoff & Summit

Hacking Begins!

Project Feedback Session

Project Check-in #1 Due

Wanting to gather web3 data quickly? Learn how with a workshop on querying The Graph Network!

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