Does this skill support cross-chain swaps?

Yes, it includes support for multiple networks including Ethereum Mainnet, Arbitrum, Optimism, Base, Polygon, BNB, Blast, and Unichain.

What libraries are required to use this skill effectively?

This skill assumes familiarity with the viem library for blockchain interactions and utilizes Uniswap-specific SDKs like @uniswap/universal-router-sdk.

What is the recommended method for frontend swap integration?

The Trading API is the recommended method for frontends and backends as it handles complex routing optimization automatically and simplifies the transaction flow.

Can I use this skill to write smart contract integration logic?

Yes, the skill provides specific guidance on calling the Universal Router's execute() function and encoding manual commands for on-chain composability.

What is Permit2 and why is it used in this skill?

Permit2 enables signature-based token approvals instead of traditional on-chain approve() calls, which improves the user experience by reducing gas costs and transaction steps.

Uniswap Swap Integration

Name: Uniswap Swap Integration
Author: Uniswap

byUniswap

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API Development

Integrates Uniswap protocol swap functionality into web applications, backend scripts, and smart contracts using the Trading API and Universal Router.

About

This skill empowers developers to build decentralized trading experiences by providing a standardized workflow for integrating Uniswap protocol swaps. It facilitates the end-to-end process of checking token approvals via Permit2, fetching optimized quotes through the Uniswap Trading API, and executing transactions on-chain. Whether you are building a React-based frontend, a Node.js trading bot, or direct smart contract composability, this skill offers the necessary implementation patterns and reference material to handle complex routing and multi-chain swaps efficiently.

Key Features

13 GitHub stars
Automated routing optimization via the Uniswap Trading API
Permit2 signature-based token approval integration patterns
Universal Router command encoding for smart contract interaction
Multi-chain support for Ethereum, Arbitrum, Base, Polygon, and more
Comprehensive guides for both high-level SDK and low-level manual integrations

Use Cases

Building a custom DeFi trading interface with React or Next.js
Creating automated arbitrage or liquidity management bots in Node.js
Integrating on-chain swap logic directly into existing smart contract ecosystems

About

Key Features

13 GitHub stars
Automated routing optimization via the Uniswap Trading API
Permit2 signature-based token approval integration patterns
Universal Router command encoding for smart contract interaction
Multi-chain support for Ethereum, Arbitrum, Base, Polygon, and more
Comprehensive guides for both high-level SDK and low-level manual integrations

Use Cases

Building a custom DeFi trading interface with React or Next.js
Creating automated arbitrage or liquidity management bots in Node.js
Integrating on-chain swap logic directly into existing smart contract ecosystems