Learn blockchain & smart-contract security
Most crypto losses aren't market moves, they're broken smart contracts, rug pulls and exploits. Understanding how the code works is the single best defence. Rather than write a shallow version ourselves, we'll point you to the people who teach it best: Cyfrin and its co-founder Patrick Collins. Free, rigorous, and industry-standard.
Why Cyfrin
Cyfrin is a smart-contract security and auditing firm that also runs the most complete free education in the space. Patrick Collins' courses have taught a large share of the working Solidity developers and auditors today. If you want to understand what's actually happening under a DeFi protocol, staking, liquidity pools, oracles, and the bugs that drain them, this is where to start.
Where to start
1. Cyfrin Updraft, the courses
A free, structured learning platform: from Solidity basics through Foundry, advanced DeFi, and full smart-contract security & auditing tracks. Start here if you want a path rather than scattered videos.
2. The code, GitHub
The courses are built around real, runnable repos. Clone them, break them, fix them, reading security code is how you learn to spot the bugs.
- Cyfrin, course repos, security resources and audit tooling: github.com/cyfrin
- Patrick Collins, the co-founder's own repos and famous full-course material: github.com/patrickalphac
3. Video
Prefer to watch? Start with this deep-dive walkthrough, then follow the structured courses on Updraft.
How this connects to the rest of Peaky Learn
The security lens makes the DeFi guides land harder. Once you can read a contract, the mechanics behind staking, liquidity pools and rug pulls stop being magic, you can see exactly where the yield and the risk come from. Security first, yield second.
Educational resources curated for you, not financial advice. External links are third-party; we're not responsible for their content. Crypto and DeFi carry high risk of loss, do your own research.