Unit Description
Explore numeric errors in Solidity and how to exploit and defend against them.
Objectives

Topics Covered

  • Numeric errors: overflow, underflow, and divide by zero in Solidity
  • Exploiting vulnerabilities in older Solidity versions
  • Defensive techniques: SafeMath, error checking, and using Solidity 0.8.0+

Recommended For

  • Developers interested in secure smart contract development
  • Individuals looking to understand and exploit Solidity vulnerabilities

Prerequisite Knowledge

  • Basic understanding of Solidity and smart contracts
  • Familiarity with Ethereum and blockchain concepts
Composition
Numeric Errors
Numeric Errors
[Exercise] Integer Overflow
Exploit Tech: Integer Overflow
SC: Dreamhack Token Shop
Practice what you learned in Wargame
These challenges apply the concepts you learned in this lecture. Try solving them right away.
Challenge info
Category
Solvers
DreamIdle
web3
142
Rating
9.9 (9)
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Solidity: Numeric Errors
9.9
(9)
Tier 2 Easy
Unit Detail
1 hour 30 minutes read
2 courses
1 challenges
Solve Wargame challenges with what you learned
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The Lab is a practice and is not included in the overall progress.