• 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

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