Smart Contract Risks
Smart contract risk is the possibility that bugs, exploits, or design flaws in protocol code result in loss of funds. It is the defining risk of DeFi.
Types of Vulnerabilities
Code Bugs
Logic Errors: Code does not behave as intended. Arithmetic Issues: Overflow/underflow, rounding errors. Access Control: Functions accessible to unauthorized users. Reentrancy: External calls allowing attackers to re-enter functions.Design Flaws
Economic Attacks: Mathematically correct code exploited through unexpected economic actions. Governance Attacks: Exploiting voting mechanisms or admin functions. Composability Risks: Safe contracts becoming unsafe when combined with other protocols.Upgrade Risks
Proxy Patterns: Upgradeable contracts can have new vulnerabilities introduced. Admin Keys: Multi-sig or single admin can modify or drain protocol.Evaluating Protocol Security
Audit Status
- Has the protocol been audited?
- By which firms? (Trail of Bits, OpenZeppelin, ChainSecurity are well-regarded)
- When was the audit? Were findings addressed?
Track Record
- Time in production with significant TVL
- How did protocol handle past issues?
- Bug bounty program active?
Code Quality
- Open source and documented?
- Extensive test coverage?
- Active development and maintenance?
Governance
- Multisig for sensitive actions?
- Timelock before admin changes?
- Decentralized decision making?
Risk Assessment Framework
Low Risk: Multiple audits, years in production, large TVL, timelocked governance. Medium Risk: Single audit, newer with growing TVL, some admin controls. High Risk: No audit, new protocol, upgradeable with no timelock, complex mechanisms.Protecting Yourself
Diversification: Never put all funds in one protocol. Position Sizing: Larger allocations only to battle-tested protocols. Monitoring: Follow updates and security disclosures. Insurance: Consider DeFi insurance for significant positions.FAQ
Do audits guarantee safety?No. Audits reduce risk but cannot eliminate it. Audited protocols have been hacked.
How can I check if a protocol is audited?Check documentation, GitHub, or DeFi Safety. Look for reports from reputable firms.
What is the safest DeFi protocol?No protocol is completely safe. Aave, Compound, Uniswap have long track records.
Related Topics
Explore: [oracle risks](/insights/learn/oracle-risks), [DeFi insurance](/insights/learn/defi-insurance).
Evaluate protocol risks. Fensory provides security context for DeFi opportunities.[Explore DeFi Safely →](https://www.fensory.com)