What are some common vulnerabilities in smart contracts?
Common vulnerabilities include reentrancy, integer overflow/underflow, and gas limit issues.
Can you explain reentrancy in more detail?
Reentrancy occurs when a contract calls another contract and allows it to call back into the first contract before the first call is finished.
How can developers prevent these vulnerabilities?
Developers can use best practices like checks-effects-interactions pattern, proper testing, and using tools for static analysis.
Are there any famous hacks due to these vulnerabilities?
Yes, the DAO hack in 2016 is a notable example where reentrancy was exploited, leading to a loss of millions.
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