Smart Contracts and Hacking 101

If you are attending my talk about blockchain technology, smart contracts and common security issues of the latter, this repo is for you!

Smart Contracts

First peek into a live smart contract using a block explorer

• Goerli Etherscan URL

Vulnerabilities

1. Front-running:
   • Crack the hash challenge
2. Clear-text secrets:
   • Case study 1
   • Case study 2
   • Case study 3
3. Integer over/underflow:
   • Sum up!
4. Reentrancy:
   • Victim
   • Attacker template