Secure Coding for Web3 and Smart Contracts

Smart contract bugs have caused billions in losses.

Common Vulnerabilities

- Reentrancy attacks
- Integer overflow/underflow
- Access control flaws
- Front-running
- Oracle manipulation

Notable Hacks

- The DAO: $60M (2016)
- Poly Network: $600M (2021)
- Wormhole: $320M (2022)
- Ronin: $625M (2022)

Security Practices

- Formal verification
- Multiple audits
- Bug bounty programs
- Upgradeable contracts
- Time-locks and multi-sigs