--- title: Smart Contract Security - Ethernaut Level 1 : Fallback description: The post introduces the Ethernaut wargame created by OpenZeppelin, which aims to teach smart contract vulnerabilities. It explains the first challenge called... canonical: https://daily.dev/posts/smart-contract-security---ethernaut-level-1-fallback-yympyj8qo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Smart Contract Security - Ethernaut Level 1 : Fallback | daily.dev og:description: The post introduces the Ethernaut wargame created by OpenZeppelin, which aims to teach smart contract vulnerabilities. It explains the first challenge called... og:url: https://daily.dev/posts/smart-contract-security---ethernaut-level-1-fallback-yympyj8qo og:image: https://api.daily.dev/og/posts/YYmpYJ8qo.png og:image:alt: Smart Contract Security - Ethernaut Level 1 : Fallback 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. # Smart Contract Security - Ethernaut Level 1 : Fallback **[Coins Bench](https://daily.dev/sources/coinsbench)** · 4 min read · 1 upvotes · 0 comments ## Summary The post introduces the Ethernaut wargame created by OpenZeppelin, which aims to teach smart contract vulnerabilities. It explains the first challenge called 'Fallback' and provides the source code of the smart contract. The solution to the challenge is also provided. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#ethereum](https://daily.dev/tags/ethereum), [#metamask](https://daily.dev/tags/metamask), [#security](https://daily.dev/tags/security), [#smart-contracts](https://daily.dev/tags/smart-contracts), [#solidity](https://daily.dev/tags/solidity) [View this post on daily.dev](https://daily.dev/posts/smart-contract-security---ethernaut-level-1-fallback-yympyj8qo) ```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":"Smart Contract Security - Ethernaut Level 1 : Fallback","url":"https://daily.dev/posts/smart-contract-security---ethernaut-level-1-fallback-yympyj8qo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/smart-contract-security---ethernaut-level-1-fallback-yympyj8qo"},"datePublished":"2024-01-05T15:37:26.057Z","dateModified":"2024-03-14T02:16:55.694Z","description":"The post introduces the Ethernaut wargame created by OpenZeppelin, which aims to teach smart contract vulnerabilities. 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