README.md

• All the writeups can be found under /writeups directory.
• All the poc scripts can be found under /pocs directory.

npm i
for i in pocs/*.js; do npx hardhat run $i; done

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Challenges Information

No	Contracts	Type	Difficulty	Writeup published	POC published	Discord conversation
1	vulnerable/Exchange.sol, tokens/StokenERC20.sol	ERC20 (handling transfer)	Easy	✅	✅	link
2	vulnerable/Staking.sol, tokens/MockERC223.sol	Reentrancy (CEI pattern)	Easy	✅	✅	link
3	vulnerable/Takeover.sol	Logical	Easy	✅	✅	link
4	vulnerable/Auction.sol, tokens/MockERC721.sol	Logical (Push vs Pull pattern)	Easy	✅	✅	link
5	vulnerable/Staking2.sol, tokens/ExpensiveToken.sol, tokens/MockERC777.sol	Logical, Reentrancy, Gas	Hard	✅	✅	link
6	vulnerable/KYC.sol, tokens/KYCApp.sol	Signature malleability	Easy	✅	✅	link
7	vulnerable/RareNFT.sol, tokens/ERC721.sol	Weak RNG(Random number generation)	Medium	✅	✅	link