DeFi Smart Contract Vulnerabilities Audit Guide

Here's a thinking process:

1. Understand User Request:

   • User wants: "List 3 common DeFi smart contract vulnerabilities and how to detect them. Be specific."
   • Key elements: 3 vulnerabilities, DeFi context, detection methods, specificity required.

2. Identify Core Topics:

   • DeFi smart contract vulnerabilities are well-documented. I need to pick 3 of the most common/critical ones.
   • Common ones: Reentrancy, Integer Overflow/Underflow (though Solidity 0.8+ has built-in protection), Access Control issues, Oracle Manipulation, Flash Loan attacks, Front-running, etc.
   • I should pick 3 that are distinct, fundamental, and have clear detection methods.
   • Good candidates: a) Reentrancy attacks b) Oracle manipulation/price feed issues c) Access control / privilege escalation (or maybe "Approval