How to Build a DeFi Hackathon Project in 30 Mins with Scaffold-ETH 2 | Octant DeFi Devs Day

Description

Speakers: • Austin Griffith is a core member of the Ethereum Foundation's Developer Acceleration Group, the creator of Scaffold-ETH, and the founder of the Build Guild. // TIMESTAMPS // 00:00 - Goal: How to Build a Hackathon Project with Scaffold-ETH 2 00:45 - Getting Started: npx create-eth@latest 02:14 - Hardhat vs. Foundry: Developer's Choice 03:28 - The Core Dev Loop: yarn chain, yarn start, yarn deploy 04:14 - First Look: The Scaffold-ETH 2 Debug UI 05:11 - Live Demo: Interacting with the Default YourContract 06:20 - Live Coding: Modifying the Smart Contract Logic 07:24 - Testing the Unhappy Path: Ensuring a Bad Actor Can't Withdraw 09:55 - The "Dum-Dum" Guide to Building a Hackathon Project with AI 11:09 - Brainstorming a DeFi-Native FOMO 3D Game 14:44 - Prompting the AI: Building the Core Game Logic 18:28 - Why Uniswap v2 is "Beautiful and Clean and Simple" 19:09 - The Full Vision: Integrating Morpho for Yield Generation 20:20 - Forking a Live Network: yarn fork --network base 22:23 - Removing the Owner: Towards a More Trustless Contract 23:54 - Building the Frontend with an AI Prompt 25:22 - Final Polish: Removing Console Logs and Increasing Timeouts 29:23 - Going Live: yarn deploy --network base 30:21 - The Live App on Base: Pressing the Button 31:40 - Live Debugging: "Transactions are failing. This is not working." 33:09 - Final Advice: "Build something the ecosystem will use." 33:43 - How to Learn More: SpeedrunEthereum.com Can you build and deploy a DeFi hackathon project in under 30 minutes? In this chaotic, high-energy, and incredibly insightful workshop, Austin Griffith puts Scaffold-ETH 2 and AI-powered coding to the ultimate test. Starting with a single command line, he attempts to build a complete DeFi-native "FOMO 3D" game, live and completely unrehearsed. The project involves creating a token, a dynamic pricing curve, a timeout mechanism, and even integrating with Uniswap v2 to provide liquidity—all prompted into existence with AI. This session is a masterclass in rapid prototyping, demonstrating the core developer loop of writing Solidity, testing in the debug UI, and building a frontend. More importantly, it's a candid look at the realities of building under pressure, complete with live bugs and failed transactions. Austin's key message shines through: the tools are here to build incredibly fast, but success comes from rigorous testing and building what the ecosystem truly needs. This is a must-watch for any builder who wants to learn how to iterate quickly and get their ideas live on-chain. This workshop was part of DeFi Devs Day at the Octant DeFi Summit 2025, a two-day event that brought together the brightest minds in the industry to discuss and build the future of decentralized finance. About Octant: Octant is infra for sustainable growth, powered by DeFi and aligned with Ethereum. To date, Octant funding rounds have sustainably funded hundreds of projects (over $7 million USD in grant funding) over 9 epochs, all through staking rewards. Follow the Speaker: • Austin Griffith, Creator of Scaffold-ETH: https://x.com/austingriffith Follow the Organizations: • Octant: https://x.com/OctantApp • Build Guild: https://x.com/buidlguidl • Ethereum Foundation: https://x.com/ethereumfndn Keywords: Scaffold-ETH, Austin Griffith, Hackathon, DeFi, DeFi Development, Live Coding, AI, Uniswap, Solidity, Smart Contracts, Rapid Prototyping, Base, Build Guild, Speedrun Ethereum