Chong Wang

I just got out of the shower, opened X, and saw yet another wave of people promoting Polymarket copy-trading tools.

I couldn’t take it anymore.

So today, I’m going to tell you why copy trading is a total scam.

I record some of the most impressive moments from my teenage years, all of which have appeared in my dreams these past few days.

Puzzle 2 is very similar to Puzzle 1, with the only difference being that this time we need to understand the CALLVALUE opcode.

I recently discovered that the EVM Puzzle series is an excellent set of challenges to test our understanding of EVM opcodes. The puzzles can be found at this link: https://github.com/fvictorio/evm-puzzles. In this blog post, we will focus on solving the first puzzle.

The gist of this question is that the “Recovery” contract created a “SimpleToken” contract but lost the address of the SimpleToken contract. Now, the goal is to find the address of the SimpleToken contract and transfer the ETH inside it.

This question has a difficulty rating of 4 stars and is a very interesting one.

1234it('Exploit', async function () { /** CODE YOUR EXPLOIT HERE */ await this.token.transfer(this.pool.address, 1);});

In ERC20, there is not only transfer function, but also transferfrom function.

In this question, even if the transfer function is overridden and there is a lockTokens modifier to prevent transfers, the transferFrom function in ERC20 is not overridden. We can utilize this function to perform transfers.

This question requires calculating an XOR value. To get the XOR value, we need to perform XOR operation again. The way the XOR value was originally calculated in the problem statement is the same logic that needs to be implemented in our smart contract code to get the XOR value.

This question is actually straightforward. It is similar to the previous one, but this time it requires brute force and understanding the value logic of unit32, uint64, uint160