DeFi Smart Contract Vulnerabilities Audit Guide

Here's a thinking process:

1. Understand User Request:

   • Topic: DeFi smart contract vulnerabilities
   • Quantity: 3 common ones
   • Requirement: List them and explain how to detect them, with specificity

2. Identify Key Vulnerabilities in DeFi Smart Contracts:
   I need to pick 3 of the most common, impactful, and well-documented vulnerabilities in DeFi smart contracts. Common ones include:

   • Reentrancy attacks
   • Arithmetic overflows/underflows (though less common now with Solidity ^0.8.0)
   • Access control issues (owner-only functions, proxy admin takeovers)
   • Front-running / MEV related issues
   • Oracle manipulation/price feed issues
   • Integer division issues
   • Logic errors in token transfers/swaps
   • Unchecked return values
   • Timestamp dependence
   • Authorization bugs (