ETHGlobal

ETHOnline 2025

Avail

$10,000

About

Avail is designed for a new era where users, dApps, and tokens can navigate the onchain economy at an unprecedented scale. With Avail, both users and developers gain access to the entire onchain economy from anywhere.

Avail frees developers from the constraints of specific tools, programming languages, or frameworks, allowing them to use the stack that best fits their project. Simply plug-in Avail to reach any asset on any chain, at any scale.

Prizes

🌊 Build Unchained Apps with Avail Nexus SDK (General Track) ⸺ $4,500

🥇

1st place

$2,000

🥈

2nd place

$1,250

🥉

3rd place

$750

🏅

4th place

$500

For this track, devs are free to build anything, any dapp or usecase powered by Avail Nexus. Develop any innovative and efficient app across any vertical that seamlessly integrates the Avail Nexus SDK to share and transfer liquidity across chains.

Example Ideas:

Unified gas refuel: “top up gas on X chain” or refuel for any token. similar to smolrefuel.com but with Nexus integrated and better pricing.
Intent playground: Visual Composer to drag/drop steps and simulate cost/latency before submitting
Intent explorer: Uses Nexus SDK intents and creates an explorer for navigating through a wallet’s intents.
A browser extension that allows you to spend unified eth to stake on Lido
An app that allows you to deposit unified USDC/USDT on the highest yield generating market on Aave/Morpho

Qualification Requirements

README that clearly defines how Avail Nexus SDK is used
Meaningful use of Nexus SDK (nexus-core, nexus-widgets, or nexus-elements)
Show a demo of a crosschain intent interaction on the app.
Bonus points if you use Nexus SDK features like “Bridge & Execute” in the project.

🐳 Best DeFi or Payments app with Avail Nexus SDK ⸺ $5,000

🥇

1st place

$2,000

🥈

2nd place

$1,500

🥉

3rd place

$1,000

🏅

4th place

$500

This one is an interesting track for devs to experiment and innovate. If you’re building a project focused on DeFi, Payments, or agentic payments, then this track is for you! Integrate crosschain intents with Avail Nexus SDK into your app in a meaningful manner. Utilize powerful features like "Bridge & Execute", or "XCS Swaps (crosschain swaps)" to build your app. Rethink how DeFi or Payment rails are built. Build innovative solutions.

Example Ideas:

Adaptive Yield Router: what if users can move their idle stables to best APY anywhere; weekly replace intents with checking all guardrails such as slippage, gas ceiling etc. At a click of a button by a user.
Payroll & Splits: Pay your team across any chain with any token. Abstract and consolidate funds from anywhere.
An app that allows you to deposit unified USDC/USDT on the highest yield generating market on Aave/Morpho
A browser extension that allows you to spend unified eth to stake on Lido

Qualification Requirements

Qualification requirements:

README that clearly defines how Avail Nexus SDK is used
Meaningful use of Nexus SDK (nexus-core, nexus-widgets, or nexus-elements)
Show a demo of a crosschain intent interaction on the app.
Bonus points if you use Nexus SDK features like “Bridge & Execute” in the project.

📝 Developer Feedback (Test our Docs) ⸺ $500

Up to 2 teams will receive $250

This is a special bounty for EthOnline builders! We want YOU, hackers, to test our docs. We want honest feedback!

Test out the Avail Nexus SDK in your projects. Give us with any feedback as you try to build with it. If you feel like something is missing or hard to find on the docs, let us know! Add images, videos, anything to get the point across.

Add your feedback to AVAIL_FEEDBACK.md in your submission repo.

Qualification Requirements

Hackers need to:

Go through the documentation of Avail Nexus SDK
Create a AVAIL_FEEDBACK.md file in your existing Project repo or create a new Github repo and provide the feedback in it.
Upload the screenshots or any supporting material to get the point across.
Make it as detailed as possible.