수요없는공급

1. 문제 설명The contract below represents a very simple game: whoever sends it an amount of ether that is larger than the current prize becomes the new king. On such an event, the overthrown king gets paid the new prize, making a bit of ether in the process! As ponzi as it gets xD Such a fun game. Your goal is to break it. When you submit the instance back to the level, the level is going to reclaim..

1. 문제 설명Unlock the vault to pass the level! // SPDX-License-Identifier: MITpragma solidity ^0.8.0;contract Vault { bool public locked; bytes32 private password; constructor(bytes32 _password) { locked = true; password = _password; } function unlock(bytes32 _password) public { if (password == _password) { locked = false; } }} 해당 컨트랙트의 locke..

1. 문제 설명Some contracts will simply not take your money ¯\\_(ツ)_/¯ The goal of this level is to make the balance of the contract greater than zero. Things that might help: - Fallback methods - Sometimes the best way to attack a contract is with another contract. - See the "?" page above, section "Beyond the console" // SPDX-License-Identifier: MITpragma solidity ^0.8.0;contract Force { /* ..

1. 문제 설명The goal of this level is for you to claim ownership of the instance you are given.  Things that might help- Look into Solidity's documentation on the delegatecall low level function, how it works, how it can be used to delegate operations to on-chain libraries, and what implications it has on execution scope.- Fallback methods- Method ids // SPDX-License-Identifier: MITpragma solidity ^..

1. 문제 설명The goal of this level is for you to hack the basic token contract below. You are given 20 tokens to start with and you will beat the level if you somehow manage to get your hands on any additional tokens. Preferably a very large amount of tokens. Things that might help: - What is an odometer? // SPDX-License-Identifier: MITpragma solidity ^0.6.0;contract Token { mapping(address => ui..