# Cross chain Swaps and Beyond with 1inch I Tanner Moore

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-09
- Duration: 24:35
- Topics: 1inch, cross-chain swaps, aggregation, AMM, PMM, Fusion, Fusion Plus, Dutch auction, resolvers, hashed timelock contracts, HTLC, EVM chains, Solana, liquidity, arbitrage, gas efficiency, developer portal, REST API, SDK, proxy, hackathon, limit order protocol, market makers, price impact, escrow, relayer, integration, token data, wallet data, NFT data
- Watch: https://streameth.org/watch/yt-AKTbml7TFgo
- YouTube: https://www.youtube.com/watch?v=AKTbml7TFgo

## Description

Tanner Moore, Developer Relations Engineer at 1inch, presents "Cross Chain Swaps and Beyond with 1inch," covering the evolution and technology behind 1inch's swapping solutions. Starting as an ETH New York 2019 hackathon project, 1inch now supports 12 EVM chains and Solana, aggregating liquidity from major protocols for optimal, gas-efficient swaps. He details classic aggregation, 1inch Fusion (intent-based, gasless swaps using Dutch auctions and resolvers), and Fusion Plus for trustless cross-chain swaps via hashed timelock contracts (HTLCs).

The talk explains how resolvers source liquidity, the mechanics of Dutch auctions, and the benefits for large trades, such as reduced price impact and arbitrage opportunities. Integration is facilitated via a developer portal, REST APIs, and SDKs (Typescript, Golang), with guidance on secure API usage. The session concludes with hackathon bounties for non-EVM cross-chain extensions, limit order protocol projects, and API utilization.

00:00 Introduction
00:30 1inch Overview & Market Position
01:19 Supported Chains & Solana Launch
01:41 Classic Swap Aggregation Explained
02:21 Aggregator Pathfinding & Optimization
03:36 Gas Efficiency Comparison
04:19 Introduction to 1inch Fusion
04:42 Dutch Auctions & Resolvers
05:55 Dutch Auction Mechanics
06:16 Fusion Swap Example Walkthrough
07:28 Real-World Fusion Swap Case Study
08:08 Liquidity Sourcing for Resolvers
08:48 Introduction to Fusion Plus (Cross-Chain)
09:05 Cross-Chain Design & HTLCs
09:39 HTLC Mechanism Explained
10:37 Cross-Chain Swap Example
11:29 Escrow Contracts & Safety Deposits
12:11 Role of the Relayer
12:49 Secret Release & Finalization
13:26 Non-EVM Chain Extensions & Hackathon Focus
14:04 Integrating 1inch: Developer Portal & APIs
14:56 API Documentation & Dashboard
15:14 SDKs & Proxy Usage
16:29 Cloud Proxy for API Security
17:01 Additional API Suite (Token, Wallet, NFT Data)
17:20 Hackathon Bounties & Opportunities
18:14 Accessing Resources & Q&A
18:48 Q&A: Resolver Profit & Arbitrage
20:11 Q&A: Price Impact, Market Makers, and Dutch Auctions
22:26 Q&A: Spot Price vs Market Rate
24:15 Conclusion

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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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