👷 I work as a on a daily basis.
😄 I'm also passionate about smart contracts and solidity auditing. (Code4rena account: 2997ms, Sherlock account: 2997ms) , feel free to check out and . I have now become a content creator as well, uploading my lectures on smart contracts to Bilibili.
👨💻 Additionally, I love very much.
🌎 While I was in , I used to maintain a monthly life summary on CSDN blog (written in Chinese) and my own website (in Chinese). Unfortunately, they are now deprecated.
选一个，我去订座位
| 餐厅 | 描述 |
|---|---|
| Swan London | 叫什么欧式餐馆，我没去过，看着图片挺浮夸，评分不错，我还挺好奇的。吃完饭可以沿着southbank到waterloo到towerbridge走，据说是在那一段路，晚上看中伦敦还是很漂亮的。 |
| Bar Douro City | 葡萄牙菜，我去过，吃着还可以。在我公司(liverpool street)附近，还有一些不错的酒馆。那边儿我也熟儿，吃完也可以附近乱晃。 |
| Min Jiang | 北京京京京京京京京京烤鸭和粤式料理（鉴于某人是北京人），据说是按照中国古老的菜谱烹饪而成。在Kensington，说是附近非常漂亮。 |
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.
1 | it('Exploit', async function () { |
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
This task is about how we store the varaibles in Solidity, how solidity allocates space for these variables.
Amazon
Airbnb
Startup Company
ByteDance
Google
