ETHGlobal · Jul 9, 2026

In this talk, Justin Gainsley, who leads stablecoin payment acceptance at Coinbase, shares what four years of building stablecoin payments at scale has taught him about selling to enterprises and payment service providers, and what still needs to be accomplished. He opens with a 2012 Hacker News post from Coinbase founder Brian Armstrong, written before he even applied to Y Combinator, expressing the idea of using crypto to remove the 2 to 3% interchange tax Visa and Mastercard charge on every payment, showing crypto as a payment method has been ingrained in Coinbase from the start. Taking over Coinbase Commerce with the same mandate, Justin's team tried nearly everything (Bitcoin payments, every token on every chain, memecoins, cashback, point of sale, invoicing, online checkout) but nothing moved the needle, and for a while they worried crypto might not be right for payments. The signal emerged from talking to hundreds of buyers and merchants: a real cohort wanted crypto as their cash, something stable to earn into and spend without gas or volatility. So Coinbase made the non-consensus bet of stripping out Bitcoin, Ethereum, and all volatile assets to go all in on stablecoins, which drew internal backlash but sent conversion, volume, and merchant satisfaction all up. Strikingly, 64% of wallets paying on the stablecoin only product held no other assets, a fundamentally new cohort of savers rather than traders. Justin recounts bringing what they thought was the industry's best stablecoin checkout to Shopify, only to be asked about auth and capture, a term he had never heard, kicking off a year of learning what a real payment system requires: authorization holds, automated voids, configurable expiries, refunds, settlement schemes, reconciliation, and disputes. He details the resulting open source Commerce Payments Protocol, an escrow smart contract on Base powering Shopify's USDC checkout across hundreds of thousands of sites, with a permissionless operator role, six operations (authorize, capture, charge, void, refund, reclaim), and a blockchain native reclaim function letting buyers pull funds back after expiry. He covers the boring but required enterprise needs (predictable flat gas fees, custom settlement files, daily fiat delivery, compliance), argues the blockchain itself is fine for payments since Base settles in 200 milliseconds for under a penny, and identifies wallets, on-ramps, and signing UX as the real problems. He closes noting stablecoin payments have gone from curiosity to production in two years. 00:00 Introduction 00:41 Brian Armstrong's 2012 Post on Removing Interchange 01:09 Why Crypto Payments Are in Coinbase's DNA 01:35 Trying Everything to Make Crypto Payments Work 02:00 Worrying Crypto Might Not Fit Payments 02:23 Listening Closely to Buyers and Merchants 02:41 The Camp That Wanted Crypto as Cash 03:06 The Non-Consensus Bet on Stablecoins 03:35 The Internal Backlash 03:58 Why All the Metrics Went Up 04:28 64% of Wallets Held No Other Assets 04:54 The New Cohort of Savers 05:14 Bringing the Best Checkout to Shopify 05:32 The Auth and Capture Question 06:08 A Year Learning What Payments Require 06:32 Why Not to Underestimate Traditional Payments 07:15 Plugging Into Where Enterprises Already Are 07:37 The Commerce Payments Protocol on Base 08:01 How the Escrow Smart Contract Works 08:28 The Operator Role Explained 08:46 Why Operators Cannot Modify or Lock Funds 09:28 The Six Core Operations 09:48 Reclaim as a Blockchain Native Feature 10:12 The Boring but Required Enterprise Needs 10:33 Predictable Flat Gas Fees 10:44 Custom Settlement Files per PSP 11:01 Daily Fiat Delivery and Compliance 11:26 Just Another Alternative Payment Method 11:54 What the Industry Still Needs 12:19 Why the Blockchain Is Fine for Payments 12:42 Where Wallet UX Kills Conversion 13:03 Why On-Ramps Still Need to Be Better 13:27 Signing UX and Smart Wallet Adoption 13:59 From Curiosity to Production in Two Years 14:41 Closing _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ *ETHConf 2026* ETHConf is a 3 day event for founders, industry leaders, and builders who are excited about the possibilities of building on top of Ethereum. Connect with 2,000+ top innovators in crypto, finance, technology, and policy at our inaugural three-day event packed with showcases, demos, partnerships, and conversations shaping the future of the global economy. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ *Follow ETHConf* X: https://x.com/ethconf Website: https://ethconf.com _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 🎟️ Get your early bird tickets for ETHConf 2027: https://ethconf.com/2027#tickets 🎤 View the full ETHConf 2026 Speaker Schedule: https://ethconf.com/schedule _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

ETHGlobal · Jul 9, 2026

In this talk, Kaledora Kiernan Linn from Ostium discusses postmodern investing and the rise of what she terms perpification, the transformation of assets into perpetuals and the proliferation thereof. She frames the core macro thesis behind Ostium: macro news is the new reality TV. When they started the company a few years ago this was a contrarian view, but her conviction was that markets had entered a new macro paradigm. She argues the first generation of consumer trading applications, in the interim period between the 2008 great financial crisis and COVID in 2020, was a historical anomaly defined by three things: extremely low, zero-bound interest rates, extremely low inflation, and little geopolitical uncertainty. COVID broke that mold and thrust markets into the opposite: persistently higher and more unpredictable rate policy (swinging from three anticipated cuts to expected hikes), inflation that was transitory then came back, and pervasive geopolitical uncertainty. Kaledora argues this ushers in a new generation of traders, illustrated by loud, active Twitter accounts like one that made over $4 million trading oil during the Strait of Hormuz closure and another that single-shotted large gold and oil positions for over half a million dollars of P&L in under a day. She calls the underlying trend Revenge of the Hyper Online (a nod to Revenge of the Nerds), arguing that time spent from a young age in chats, trading groups, and subreddits is unexpectedly value-creative, honing two contrarian skills: identifying reflexive viral loops (sensing what the herd will focus on, honed in the meme coin trenches) and a theory of mind for unpredictable characters (intuiting what an erratic geopolitical actor might do, much like anticipating a meme coin dev). She explains what this means for the market: asset-class-specific trading is collapsing, and where the prior mobile-first generation siloed people into FX, stock, or crypto traders, the trader of today moves seamlessly between gold, Bitcoin, oil, Nvidia, and the next SpaceX IPO, agnostic to asset class and chasing momentum. This drives migration to a single platform and a single instrument, the perpetual, which turns any asset into a cash-settled, risk-modulated instrument that never expires, the perfect native tool for this style. She closes noting Ostium and others have grown tremendously, and that this new class of cross-asset macro trader has elevated perps from a niche crypto instrument into one the broader finance world now takes seriously. 00:00 Introduction 00:07 Postmodern Investing and Perpification 00:37 Why We Started the Company 00:47 Macro News Is the New Reality TV 00:58 The New Macro Paradigm 01:27 The Three Anomalies of the Old World 01:48 How COVID Broke the Mold 02:10 Higher Rates, Inflation, and Geopolitical Uncertainty 02:30 A New Generation of Traders 02:37 The Oil Trader Who Made $4 Million 02:56 Single-Shotting Gold and Oil for Half a Million 03:23 Revenge of the Hyper Online 04:02 Skill One: Identifying Reflexive Viral Loops 04:28 Skill Two: A Theory of Mind for Unpredictable Characters 05:21 The Thanksgiving Markets Meme 05:34 Why Asset-Class-Specific Trading Is Collapsing 05:49 The Siloed First Generation of Trading Apps 06:11 The Trader Who Moves Seamlessly Between Assets 06:38 The Rise of a Single Instrument and Platform 07:10 Migrating to One Platform Across Asset Classes 07:35 Why People Just Want to Long or Short Anything 08:00 What Perpification Really Means 08:25 Why the Market Has Validated Perps 08:56 The New Archetype of Cross-Asset Macro Trader 09:27 Closing _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ *ETHConf 2026* ETHConf is a 3 day event for founders, industry leaders, and builders who are excited about the possibilities of building on top of Ethereum. Connect with 2,000+ top innovators in crypto, finance, technology, and policy at our inaugural three-day event packed with showcases, demos, partnerships, and conversations shaping the future of the global economy. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ *Follow ETHConf* X: https://x.com/ethconf Website: https://ethconf.com _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 🎟️ Get your early bird tickets for ETHConf 2027: https://ethconf.com/2027#tickets 🎤 View the full ETHConf 2026 Speaker Schedule: https://ethconf.com/schedule _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Kartik Talwar

ETHGlobal · Nov 9, 2025

Kartik Talwar closes ETHGlobal New Delhi 2025 with a high-energy recap of a 36-hour hackathon: 1,900 attendees (1,600 hackers), 21 workshops, thousands of NFC wristband interactions, and 616 project submissions—far above expectations. He recaps rules, celebrates mentors and partners, and (memorably) scolds hotspot offenders with a live spectrum demo explaining why Wi-Fi broke. He also shares tech usage trends (Next.js, Solidity, ethers.js) and deployment stats across chains. The top-10 finalists demo live: UniPerp (perps on Uniswap), Autonom (agentic paywalled web via X402/ENS/Graph), Egress (7702 safety agent), Kagami AI (AI social DeFi), MemeWarp (multi-chain meme bonding curves + instant bridge), Nox (privacy dark-pool trading), Dyke/Tiki Protocol (branching prediction markets), Ad402 (micropaid on-chain ads), Kalendarify (calendar-as-wallet time-native payments), and Nonet (offline BLE mesh transactions). After a rapid-fire $200k prize roll-call, Kartik announces finalist perks (ETHGlobal Plus, credits, travel), thanks every contributor, and plugs upcoming ETHOnline, Buenos Aires, and E/NYC dates. 00:02 – Opening vibes & hacker montage 02:26 – Stats recap & weekend framing 04:47 – Wi-Fi saga & hotspot crackdown 08:02 – Submissions surge & tech trends 11:00 – Finalists reveal (Top 10) 14:44 – Live finalist demos (10 teams) 1:10:38 – Prize brief & on-chain packs 1:12:57 – $200k partner prize roll-call 1:27:35 – Finalist perks & verification 1:29:28 – Thank-yous & community shoutouts 1:30:50 – Next events & wrap-up _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 🇮🇳 *ETHGlobal New Delhi* This workshop is specifically for ETHGlobal New Delhi, a 3-day hackathon held September 19-21 at the India International Convention & Expo Centre, bringing together the most skilled web3 developers, designers and product builders from all around the globe for a weekend-long adventure to advance the Ethereum ecosystem! Watch the full ETHGlobal New Delhi 2025 playlist here: https://www.youtube.com/playlist?list=PLXzKMXK2aHh7zCFW3hBqatZ18rQaYeEJL _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ *Follow Kartik Talwar* X: https://x.com/TheRealKartik ✅ *Follow ETHGlobal* X: https://x.com/ETHGlobal​ Warpcast: https://warpcast.com/ethglobal Website: https://ethglobal.com YouTube: https://www.youtube.com/c/ETHGlobal _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Are you interested in Ethereum development and entrepreneurship?_ 👉 Sign up for the next ETHGlobal event: https://ethglobal.com/events 🎁 Get exclusive access and perks with ETHGlobal Plus! https://ethglobal.com/plus 📣 Want us to throw an event in your city? Tell us where! https://ethglobal.com/city

ETHGlobal · Oct 9, 2025

Francis Li from HashKey Chain explores Web3's "Maritime Era," where blockchain must balance decentralization with real-world compliance to achieve mass adoption. Learn how regulatory integration, on-chain insurance, and user-friendly solutions like social recovery (EIP-702) can rebuild trust and bridge traditional finance with Web3. Discover HashKey’s approach to compliance-as-a-service, enabling builders to innovate while institutions handle security. Essential for projects scaling beyond crypto-native users. 00:00 - Introduction: Web3’s "Maritime Era" & HashKey’s Vision 00:46 - Why Compliance is Web3’s Next Frontier 02:04 - Core Ideals: Permissionless Finance & Global Access 03:14 - Memecoin Volatility vs. Sustainable Growth 05:16 - EIP-702: Social Recovery for Mainstream Users 06:29 - HashKey’s Gasless Transactions (HSK Token) 07:03 - Rebuilding Trust Through Compliance 08:24 - Banks vs. Crypto: Simplifying Security 09:40 - HashKey’s Compliance-as-a-Service Model 10:21 - On-Chain Insurance & Liquidity Solutions 11:38 - How Compliance Unlocks Builder Innovation 12:15 - Closing: Compliance as a Bridge to Adoption _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 🇹🇼 *Pragma Taipei* Pragma Taipei 2025 was held on April 3rd at POPOP in Taipei, Taiwan and was an in-person summit for builders and leaders in the web3 ecosystem. Watch the full Pragma Taipei YouTube Playlist here: ETHGlobal's Pragma series takes place in cities around the world, and is designed to be a different kind of event. Pragma is a one-stage conference with founders-only on stage, bringing together a small group of curated attendees and speakers to discuss the future of web3 and reflect on the past. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ Follow HashKey Chain X: https://x.com/HashKeyHSK ✅ Follow Kartik Talwar X: https://x.com/TheRealKartik ✅ Follow ETHGlobal X: https://x.com/ETHGlobal​ Warpcast: https://warpcast.com/ethglobal Website: https://ethglobal.com YouTube: https://www.youtube.com/@ETHGlobal _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Are you interested in Ethereum development and entrepreneurship? 👉 Sign up for the next ETHGlobal event: https://ethglobal.com/events 🎁 Get exclusive access and perks with ETHGlobal Plus! https://ethglobal.com/plus 📣 Want us to throw an event in your city? Tell us where! https://ethglobal.com/city _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

ETHGlobal · Oct 9, 2025

Jake Hall presents "The Ultimate Vibe Coding Guide for Hackathons," introducing Task-Driven Development (TDD) as an AI-powered alternative to Test-Driven Development. He demonstrates using AI tools like Cursor and models such as GPT-3 and Claude to structure and automate coding workflows, specifically for hackathon projects. The session focuses on building a custom plugin for the Hedera Agent Kit, integrating with Meme Job Fund (a Web3 token platform), and emphasizes the importance of creating a Product Requirements Document (PRD) to anchor AI outputs and prevent hallucinations. Jake details a step-by-step process: drafting a PRD, generating granular tasks, and iteratively collaborating with AI to implement features, referencing documentation and existing code for context. He highlights best practices for context management, task validation, and parallelizing work, aiming to boost productivity and maintainability in rapid development environments. The talk concludes with a recap of the TDD workflow and encourages hands-on exploration. 00:00 Introduction 00:29 Task-Driven Development Overview 01:19 Repo and Hackathon-Specific Rules 01:36 Hedera Agent Kit & Project Context 02:44 Plugin Objective & Workflow Steps 03:08 Step 1: Creating the PRD 04:19 Context Engineering & Referencing Docs 05:24 Choosing AI Models & Prompt Engineering 06:16 Clarifying Questions & PRD Anchoring 07:20 PRD Structure & Task Generation 08:37 Q&A: Managing Context 09:29 Step 2: Creating Tasks 10:40 Reviewing & Adjusting Tasks 12:04 Implementation Phase & Parallelization 14:14 CLI Tools & Productivity Tips 15:14 Adding Context for Implementation 16:17 Managing Chat Contexts 17:22 Monitoring AI Progress & Reference Tools 18:48 Plugin Creation & LangChain Integration 19:42 Final Steps & Time Constraints 20:17 Recap & Best Practices 21:00 Conclusion & Q&A _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 🇫🇷 *ETHGlobal Cannes* This workshop is specifically for ETHGlobal Cannes, a 3-day hackathon held July 4-6, bringing together the most skilled web3 developers, designers and product builders from all around the globe for a weekend-long adventure to advance the Ethereum ecosystem! Watch the full ETHGlobal Cannes 2025 playlist here: https://youtube.com/playlist?list=PLXzKMXK2aHh5N2DCwhcEshNW9C8knZ1T-&si=Lc-WOyfkAVP2--R4 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ *Follow Hedera* X: https://x.com/hedera ✅ *Follow ETHGlobal* X: https://x.com/ETHGlobal​ Warpcast: https://warpcast.com/ethglobal Website: https://ethglobal.com YouTube: https://www.youtube.com/c/ETHGlobal _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Are you interested in Ethereum development and entrepreneurship?_ 👉 Sign up for the next ETHGlobal event: https://ethglobal.com/events 🎁 Get exclusive access and perks with ETHGlobal Plus! https://ethglobal.com/plus 📣 Want us to throw an event in your city? Tell us where! https://ethglobal.com/city _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

ETHGlobal · Oct 9, 2025

This talk, led by Sauce Point, a Uniswap Foundation protocol engineer, introduces Uniswap v4 on Unichain, highlighting its key innovations and developer opportunities. Uniswap v4 features a singleton architecture for enhanced gas efficiency, continuous and dynamic fee spectrum, ERC6909 internal claims tokens, flash accounting, and most notably, programmable hooks. Hooks allow developers to customize pool behavior, enabling programmable liquidity and supporting new asset classes, dynamic fees, liquidity management, and public goods like oracles and advanced order types. The session categorizes hooks into liquidity profitability, liquidity depth, asset class customization, and public goods, providing examples such as dynamic fees, limit orders, KYC compliance, and volatility oracles. Sauce demonstrates live coding with the v4 template, showing how to build and test hooks using Solidity, and emphasizes the importance of testing. Resources like the hook directory, documentation, and Discord are shared for further support. The session concludes with a Q&A on building hooks for various asset classes and optimizing pools for both liquidity providers and swappers. 00:00 Introduction 00:26 Overview & Speaker Introduction 01:46 Uniswap v4 Metrics & Adoption 02:36 Uniswap v4 vs v3: Key Differences 03:43 Singleton Architecture & Gas Efficiency 04:06 Continuous & Dynamic Fees 04:50 ERC6909, Flash Accounting, and Hooks 05:39 Hooks Overview & Programmable Liquidity 06:54 Types of Hooks: Liquidity Profitability 08:09 Types of Hooks: Liquidity Depth 09:20 Types of Hooks: Asset Class Customization 10:39 Types of Hooks: Public Goods 11:47 Resources & Getting Involved 12:36 Live Coding: Building a Hook 13:36 Dynamic Fees & Custom Logic in Hooks 14:43 After Swap Logic & Monetization 15:38 Liquidity Hooks & Penalties 17:23 Testing Hooks with V4 Template 19:05 Deployment Scripts & Chain Configuration 20:28 Custom Pricing Algorithms in Hooks 22:02 Q&A: Asset Class Hooks & Pool Optimization 24:07 Modifying Liquidity & Flash Accounting 24:35 Closing Remarks _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 🇺🇸 *ETHGlobal New York* This workshop is specifically for ETHGlobal New York, a 3-day hackathon held August 15-17, bringing together the most skilled web3 developers, designers and product builders from all around the globe for a weekend-long adventure to advance the Ethereum ecosystem! Watch the full ETHGlobal New York 2025 playlist here: https://www.youtube.com/playlist?list=PLXzKMXK2aHh4Xze0ZeSWCSGsw25clPpvZ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ *Follow Uniswap* X: https://x.com/Uniswap ✅ *Follow ETHGlobal* X: https://x.com/ETHGlobal​ Warpcast: https://warpcast.com/ethglobal Website: https://ethglobal.com YouTube: https://www.youtube.com/c/ETHGlobal _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Are you interested in Ethereum development and entrepreneurship?_ 👉 Sign up for the next ETHGlobal event: https://ethglobal.com/events 🎁 Get exclusive access and perks with ETHGlobal Plus! https://ethglobal.com/plus 📣 Want us to throw an event in your city? Tell us where! https://ethglobal.com/city _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Aqeel Mohammad

Conflux - Web3 UX Unconference · Nov 16, 2023

No description The video features an opening speech from a conference in Istanbul addressing the UX community. Despite regional challenges and the absence of some colleagues, the speaker appreciates attendees' presence at DevConnect and encourages them to enjoy the additional activities available, including Turkish ice cream and coffee. The speech explains that the UXLand conference is an "un-conference," where participants create the event by discussing topics of interest to them. The conference has no sponsors or volunteers but is supported by the Ethereum Foundation and DevConnect. The speaker emphasizes that the success of the event depends on attendee participation and stresses that it's a collaborative environment rather than a platform for promoting individual projects. Attendees represent various professional backgrounds, with product development, engineering, and design being prominent. Key topics for discussion include account extraction, user onboarding, Web3 design principles, and general adoption within the ecosystem. Working groups will form to delve deeper into these areas in a collaborative setting with provided tools like FigJam for documentation. The speaker also mentions a goal of creating memorable ways (memes) to communicate complex UX concepts outside of the conference to foster broader understanding and excitement. An example given is "4337," which has gained attention despite many not fully understanding it. The video outlines rules for speakers, including strict time limits,