tutorial - Adrian Hetman

Adrian Hetman

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tutorial

A collection of 9 posts

How to become smart contract auditor?

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How to become smart contract auditor?

I would like to tell you it's an easy route to become one, but it isn't and there isn't a single path you need to take to become one. But there are multiple things you should do to increase your chances. First thing would

Unboxing tx.origin. Rune Token case

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Unboxing tx.origin. Rune Token case

Today we saw how ThorChain protocol get rekt on multiple levels. First we saw a black-hat attack the protocol and steal $8M. > THORChain has suffered a sophisticated attack on the ETH Router, around $8m. The hacker deliberately limited their impact, seemingly a whitehat. ETH will be halted until it

Unboxing Sharding

Unboxing Sharding

Yesterday we talked about Proof of Stake and Beacon Chain [https://www.adrianhetman.com/unboxing-ethereums-proof-of-stake/]. But to truly appreciate Beacon Chain, we need to talk about sharding. The main difficulty in achieving scalability that Blockchains (including Ethereum) currently face is that every node has to verify and execute every transaction.

Unboxing Ethereum's Proof of Stake

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Unboxing Ethereum's Proof of Stake

Proof of Stake is coming in big steps and is much closer to a full release than you can imagine. This article will cover what Proof of Stake (PoS) is and how it will work. Grab the popcorn 🍿 and ☕, and enjoy! What is PoS? Proof of Stake is the next

Unboxing Flash Loans

Unboxing Flash Loans

Everybody understands what regular loans are. You need to provide proof of income, reserves, or other information a bank may need to take one. There are, of course, uncollateralized loans where you don't need to put forward any collateral i.e., you don't need to provide

Unboxing front-running attack

Unboxing front-running attack

In today’s post we’re going to unbox another popular type of attack, front-running transactions. This type of attack takes different forms and can be used in various ways. One of the examples of front-running I explained recently during ERC20 approval unboxing [https://www.adrianhetman.com/unboxing-erc20-approve-issues/]. But first

Unboxing re-entrancy attack

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Unboxing re-entrancy attack

The most known vulnerability in Smart Contracts. The one that made the Ethereum do a hard fork and split between Ethereum and Ethereum Classic. When it was first unveiled, it was during a multimillion-dollar heist which led to the split mentioned above in the chain. Five years have passed since

Unboxing ERC20 approve() issues

Unboxing ERC20 approve() issues

ERC20 Token standard is the most adapted standard in the Ethereum ecosystem. It is widely used and easy to use. Many users of Ethereum already know what ERC20 token does and what functions it does how. But there is one function in the standard implementation that causes the most problems

Unboxing EVM storage

Unboxing EVM storage

Ethereum smart contracts use a rather abnormal storage model inside EVM. It is not necessarily useful to know and understand how data types are represented at a low level in a typical programming language. Solidity and other EVM-type languages are different as this knowledge is crucial as storage access is