수요없는공급

Claim ownership of the contract below to complete this level. Things that might help - See the "?" page above, section "Beyond the console" 해당 컨트랙트의 소유권을 빼앗으면 이번 레벨을 통과할 수 있다. // SPDX-License-Identifier: MITpragma solidity ^0.8.0;contract Telephone { address public owner; constructor() { owner = msg.sender; } function changeOwner(address _owner) public { if (tx.origin !..

This is a coin flipping game where you need to build up your winning streak by guessing the outcome of a coin flip. To complete this level you'll need to use your psychic abilities to guess the correct outcome 10 times in a row.  Things that might help- See the "?" page above in the top right corner menu, section "Beyond the console"section "Beyond the console" - https://ethernaut.openzeppelin.c..

Claim ownership of the contract below to complete this level.  Things that might help- Solidity Remix IDEDifficulty: ★☆☆☆☆아래의 컨트랙트의 소유권을 가져오면 되는 문제이다.(Remix IDE라는 것이 도움을 줄 수 있을 것이라고 한다) // SPDX-License-Identifier: MITpragma solidity ^0.6.0;import "openzeppelin-contracts-06/math/SafeMath.sol";contract Fallout { using SafeMath for uint256; mapping(address => uint256) allocations; address ..

Look carefully at the contract's code below.You will beat this level if1. you claim ownership of the contract2. you reduce its balance to 0  Things that might help- How to send ether when interacting with an ABI- How to send ether outside of the ABI- Converting to and from wei/ether units (see help() command)- Fallback methodsDifficulty: ★☆☆☆☆해당 컨트랙트의 소유권을 획득하고 그것의 잔고를 0으로 만들어야 하는 문제이다. // SPDX-..

https://ethernaut.openzeppelin.com/ https://ethernaut.openzeppelin.com/ ethernaut.openzeppelin.com이더넛(Ethernaut)이란 Web3 워게임 사이트에서 공부를 시작하였고 문제 풀이를 꾸준히 포스팅해보도록 하겠다.This level walks you through the very basics of how to play the game.Difficulty: ☆☆☆☆☆ 우선 브라우저의 콘솔을 열어 컨트랙트와 통신해야 하는 것으로 보인다. player의 주소와 getBalance() 함수로 player의 잔고도 확인할 수 있다. 문제에서 제시해준 대로 contract.info()를 입력해보겠다.info() 함수를 호출하니 위와 같은..