---
title: "Discussion on \"Ethernaut Series - 05 (Token)\" | Hashnode"
description: "Discussion on \"Ethernaut Series - 05 (Token)\". Concept\nThe emphasis of this level is on the concept of overflow and underflow which is a concern for contracts written in solidity version <0.8.\nBasically, there are different types of integer data type. For example, uint256, int256, uint8, int8. Ea..."
url: "https://hashnode.com/posts/ethernaut-ctf-series-05-token/670c1d8e1f5d63f2857c0297"
---

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# [Ethernaut Series - 05 (Token)](https://blog.hexbyte.in/ethernaut-ctf-series-05-token?utm_source=hashnode&utm_medium=feed)

Concept The emphasis of this level is on the concept of overflow and underflow which is a concern for contracts written in solidity version <0.8. Basically, there are different types of integer data type. For example, uint256, int256, uint8, int8. Ea...

Oct 13, 2024 · 2 min read · blog.hexbyte.in  
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