--- title: Inside Uniswap V3’s Most Powerful Contract: A Deep Audit... description: A detailed audit of Uniswap V3's NonfungiblePositionManager contract, covering every import, storage layout, and core function. The analysis explains how... canonical: https://daily.dev/posts/inside-uniswap-v3-s-most-powerful-contract-a-deep-audit-of-nonfungible-position-manager-orlvwfage twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Inside Uniswap V3’s Most Powerful Contract: A Deep Audit of Nonfungible Position Manager | daily.dev og:description: A detailed audit of Uniswap V3's NonfungiblePositionManager contract, covering every import, storage layout, and core function. The analysis explains how... og:url: https://daily.dev/posts/inside-uniswap-v3-s-most-powerful-contract-a-deep-audit-of-nonfungible-position-manager-orlvwfage og:image: https://api.daily.dev/og/posts/OrlvWfAGe.png og:image:alt: Inside Uniswap V3’s Most Powerful Contract: A Deep Audit of Nonfungible Position Manager og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Inside Uniswap V3’s Most Powerful Contract: A Deep Audit of Nonfungible Position Manager **[Coins Bench](https://daily.dev/sources/coinsbench)** · 15 min read · 0 upvotes · 0 comments ## Summary A detailed audit of Uniswap V3's NonfungiblePositionManager contract, covering every import, storage layout, and core function. The analysis explains how concentrated liquidity positions are wrapped as ERC-721 NFTs, how fixed-point fee accounting works using FullMath and FixedPoint128, and how design choices like struct packing, pool ID normalization, ERC721Permit, Multicall, and SelfPermit combine for gas efficiency and UX. Security observations cover access control, slippage protection, deadline enforcement, the zero-burn trick in collect, and the immutable token descriptor tradeoff. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Understanding Concentrated Liquidity in Uniswap v3](https://daily.dev/posts/understanding-concentrated-liquidity-in-uniswap-v3-iapslnhxv) · Coins Bench · 1 upvotes · 0 comments - [Inside the ERC20 Token Standard: A Deep Dive into Open Zeppelin’s Implementation](https://daily.dev/posts/inside-the-erc20-token-standard-a-deep-dive-into-open-zeppelin-s-implementation-dwl46ieog) · Coins Bench · 0 upvotes · 0 comments --- Tags: [#smart-contracts](https://daily.dev/tags/smart-contracts), [#solidity](https://daily.dev/tags/solidity), [#defi](https://daily.dev/tags/defi) [View this post on daily.dev](https://daily.dev/posts/inside-uniswap-v3-s-most-powerful-contract-a-deep-audit-of-nonfungible-position-manager-orlvwfage) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Inside Uniswap V3’s Most Powerful Contract: A Deep Audit of Nonfungible Position Manager","url":"https://daily.dev/posts/inside-uniswap-v3-s-most-powerful-contract-a-deep-audit-of-nonfungible-position-manager-orlvwfage","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/inside-uniswap-v3-s-most-powerful-contract-a-deep-audit-of-nonfungible-position-manager-orlvwfage"},"datePublished":"2026-04-21T16:50:14.008Z","dateModified":"2026-04-21T16:50:37.771Z","description":"A detailed audit of Uniswap V3's NonfungiblePositionManager contract, covering every import, storage layout, and core function. 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