> For the complete documentation index, see [llms.txt](https://zokyo-auditing-tutorials.gitbook.io/zokyo-tutorials/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zokyo-auditing-tutorials.gitbook.io/zokyo-tutorials/tutorial-14-slippage.md). # Tutorial 14: Slippage {% hint style="info" %} [**Book an audit with Zokyo**](https://www.zokyo.io/) {% endhint %} {% hint style="info" %} **Spotting Slippage Vulnerabilities in Smart Contracts: A Beginner's Guide**. Welcome to our easy-to-follow tutorial on identifying vulnerabilities related to slippage in smart contracts. Whether you're new to the world of blockchain, a seasoned developer, or someone who speaks English as a second language, this guide is crafted to make the concept of slippage both clear and actionable for you. {% endhint %} The rise of decentralized finance (DeFi) has revolutionized how we think about financial transactions. Through DeFi, we're envisioning a world where exchanges and financial activities are open, transparent, and free from intermediaries. However, as with any technology, it comes with its unique challenges. One of the most talked-about issues in DeFi exchanges is 'slippage'. But what exactly is slippage? At its core, slippage occurs when there's a difference between the expected price of a trade in a decentralized exchange and the price at which the trade is executed. This might sound simple, but unchecked or poorly managed slippage can be a gateway to significant vulnerabilities. It can mean users end up with unfair deals, and in some cases, it can be exploited by malicious actors. Surprisingly, many smart contracts don't handle slippage issues adequately. Some might overlook it, while others might implement too strict or too lax measures. This is where the importance of our tutorial comes in. Throughout this guide, we'll delve deep into how slippage can become a vulnerability in smart contracts. We'll break down its mechanics, demonstrate real-world examples, and provide you with the tools to spot and address these vulnerabilities effectively. By the end, our hope is that you'll be well-equipped to ensure the integrity and fairness of smart contract transactions. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://zokyo-auditing-tutorials.gitbook.io/zokyo-tutorials/tutorial-14-slippage.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.