# Build a 1 Click Cross-Chain Experience with Avail Nexus SDK I Robin Roy

- Speakers: [Robin Roy](https://streameth.org/speakers/robin-roy)
- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-09
- Duration: 18:33
- Topics: Avail, Nexus SDK, cross-chain, one-click, Web3, EVM, bridge, transfer, execute, unified balance, liquidity, multi-chain, user experience, developer, DEX, yield aggregator, lending protocol, tipping, gaming, demo, intent, portfolio, Ethereum, Optimism, Arbitrum, Base, Polygon, Scroll, SDK, integration, bounties, project ideas, permissionless, data availability, DeFi, RWA, stablecoins, Farcaster, Lens, simulation, hooks, MetaMask
- Watch: https://streameth.org/watch/yt-7CbkuMYPPmQ
- YouTube: https://www.youtube.com/watch?v=7CbkuMYPPmQ

## Description

Robin Roy presents the Avail Nexus SDK, a developer toolkit enabling seamless one-click cross-chain experiences for Web3 applications. Nexus abstracts away the complexity of multi-chain interactions, letting users bridge, transfer, and execute transactions across major EVM-compatible chains (like Ethereum, Optimism, Arbitrum, Base, Polygon, Scroll) without leaving the app or using third-party bridges.

Key features include unified token balances, intent-based bridging, and bridge-and-execute functions, allowing developers to build cross-chain DEXs, yield aggregators, lending protocols, tipping clients, and gaming apps with minimal friction. The demo shows easy SDK integration, unified portfolio views, and transaction simulations. Nexus currently supports only EVM chains and liquidity must exist on supported chains. Resources, project ideas, and bounties are available for builders.

00:00 Introduction  
00:50 Overview of Avail Stack & Products  
01:22 What is Nexus?  
02:23 Cross-Chain UX Challenges  
03:10 Nexus SDK Features  
04:07 Bridge and Execute Explained  
05:11 Multi-Chain Application Use Cases  
06:46 Bounties & Project Ideas  
07:20 Live Demo: Integrating Nexus SDK  
09:09 Unified Balances & Portfolio Aggregation  
10:16 Bridging Tokens Demo  
12:12 Developer vs User Experience  
13:04 Bridge and Execute Demo  
15:29 Code Walkthrough & Resources  
17:23 Supported Chains & Q&A  
18:13 EVM Compatibility & Closing

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🇫🇷 *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

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