개발 코어 강화 일지

1. 문제 https://ethernaut.openzeppelin.com/level/32 ethernaut.openzeppelin.comSlockDotIt’s new product, ECLocker, integrates IoT gate locks with Solidity smart contracts, utilizing Ethereum ECDSA for authorization. When a valid signature is sent to the lock, the system emits an Open event, unlocking doors for the authorized controller. SlockDotIt has hired you to assess the security of this produc..

Web3OJ Web3OJ | Web 3.0 온라인 저지 | Web3OJDeveloper Recruitment Web3OJ not only prepares for the technical interview, but also supports the recruitment of the best talent in the company. Through online evaluation and training, we provide talent discovery and high-quality talent nurturing services.app.web3oj.com 국내 유일의 Solidity 문제 풀이를 위한 온라인 저지 플랫폼. 난이도가 들쭉날쭉한 Ethernaut과 비교해, 기초적인 사칙연산 구현부터 ERC20, E..

The EthernautThe Ethernaut is a Web3/Solidity based wargame played in the Ethereum Virtual Machine. Each level is a smart contract that needs to be 'hacked'. The game is 100% open source and all levels are contributions made by other players.ethernaut.openzeppelin.com번호이름풀이키워드0Hello Ethernauthttps://piatoss3612.tistory.com/88 1Fallbackhttps://piatoss3612.tistory.com/89fallback2Fallouthttps://pia..

1. 문제 The EthernautThe Ethernaut is a Web3/Solidity based wargame played in the Ethereum Virtual Machine. Each level is a smart contract that needs to be 'hacked'. The game is 100% open source and all levels are contributions made by other players.ethernaut.openzeppelin.comImagine a world where the rules are meant to be broken, and only the cunning and the bold can rise to power. Welcome to the ..

1. 문제 The EthernautThe Ethernaut is a Web3/Solidity based wargame played in the Ethereum Virtual Machine. Each level is a smart contract that needs to be 'hacked'. The game is 100% open source and all levels are contributions made by other players.ethernaut.openzeppelin.comStake is safe for staking native ETH and ERC20 WETH, considering the same 1:1 value of the tokens. Can you drain the contrac..

Foundry 프로젝트에 Hardhat 프로젝트 초기화 다음과 같이 이미 Foundry 프로젝트가 생성되어 있는 디렉터리 안에서 진행합니다. 1. npx hardhat init 명령어를 사용해 hardhat.config.js 파일과 package.json 파만 생성을 해줍니다. $ npx hardhat init 888 888 888 888 888 888 888 888 888 888 888 888 888 888 888 8888888888 8888b. 888d888 .d88888 88888b. 8888b. 888888 888 888 "88b 888P" d88" 888 888 "88b "88b 888 888 888 .d888888 888 888 888 888 888 .d888888 888 888 888 888..

Governor Smart Contract Governor는 온체인 거버넌스에 필요한 로직을 구현한 컨트랙트입니다. OpenZeppelin 공식문서에 정리가 잘 되어있기는 하지만, 전체적인 동작 과정에 대한 설명이 부족한 것 같아서 이에 대해서 한 번 정리해보고자 합니다.

문제 문제를 푼 기억은 안 나는데 왜인지 풀이도 적혀있고 테스트도 잘 돌아가는 상황... 도와줘 과거의 나! Climber There’s a secure vault contract guarding 10 million DVT tokens. The vault is upgradeable, following the UUPS pattern. The owner of the vault, currently a timelock contract, can withdraw a very limited amount of tokens every 15 days. On the vault there’ www.damnvulnerabledefi.xyz 컨트랙트 구조 문제에서 제시된 컨트랙트의 구조는 대략적으로 다음과 같습니다. Climbe..

문제 Backdoor To incentivize the creation of more secure wallets in their team, someone has deployed a registry of Gnosis Safe wallets. When someone in the team deploys and registers a wallet, they will earn 10 DVT tokens. To make sure everything is safe and sound, the www.damnvulnerabledefi.xyz Gnosis Safe와 Proxy Pattern Gnosis Safe는 계정 추상화가 적용된 다중 서명 지갑 컨트랙트라고 합니다. 이 문제에서 중요한 부분은 아니기 때문에 소개는 이만하..

문제 Free Rider A new marketplace of Damn Valuable NFTs has been released! There’s been an initial mint of 6 NFTs, which are available for sale in the marketplace. Each one at 15 ETH. The developers behind it have been notified the marketplace is vulnerable. All tokens www.damnvulnerabledefi.xyz 취약점 msg.value의 잘못된 사용 FreeRiderNFTMarketplace 컨트랙트의 취약점은 buyMany 함수에서 호출된 _buyOne 함수에서 msg.value를 그대로 사..