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Ethernaut Lvl 0 Walkthrough: ABIs, Web3, and how to abuse them

Make a smart contract do things it didn’t want to…

Nicole Zhu
Aug 13, 2018 · 3 min read

How Ethernaut works

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https://github.com/OpenZeppelin/ethernaut/blob/master/contracts/Ethernaut.sol
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Notice that all `public` functions are available in the web client

Detailed Walkthrough

function Instance(string _password) public { 
password = _password;
}
string public password;
await contract.password()
await contract.authenticate("[password here]");
await contract.getCleared();

Key Security Takeaways

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Nicole Zhu

Written by

Engineer @ParityTech | I write about cryptography and code | Tweet @nczhu

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Nicole Zhu

Written by

Engineer @ParityTech | I write about cryptography and code | Tweet @nczhu

HackerNoon.com

Elijah McClain, George Floyd, Eric Garner, Breonna Taylor, Ahmaud Arbery, Michael Brown, Oscar Grant, Atatiana Jefferson, Tamir Rice, Bettie Jones, Botham Jean

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