Hi Coders, I’m trying to reverse engineer a Kraken deposit contract to understand exactly how “unretrievable” my recent incorrect ERC-20 send is… I was going to start with “Mastering Ethereum” as my guide … Is that a good place to start or is there a better crash course book you

Jan 19, 2021, 3:19 PM

‘d recommend I start with?

(I took a 10 hr Solidity course a few years ago so I’m not totally starting from scratch, but I don’t remember much)

Yeah I loved the Udemy course I took, and built a couple simple contracts… I was hoping for a dense PDF I could use to translate things quickly, but maybe you’re right I should just try YouTube first

I was surprised to learn the deposit address for Kraken is actually a contract whereas the address for Coinbase is just a reg ETH address… i would have thought the exchange security measures were pretty standardized at this point

Jan 19, 2021, 3:32 PM

what do you mean by reverse engineering?

can't you see the clean contract code? source code

Jan 19, 2021, 4:01 PM

I think so but I don’t understand what I’m seeing

I’ll send link in a sec

Jan 19, 2021, 4:02 PM

did that link just get deleted? i’ll just send the contract address

0xa24787320ede4cc19d800bf87b41ab9539c4da9d

Jan 19, 2021, 4:04 PM

ByteCode Decompilation Result: source code

Jan 19, 2021, 4:04 PM

right, looking at that decomp, i don’t understand 98% of it …

Jan 19, 2021, 4:05 PM

to decompile means to translate from byte code into high level language

and then understand the source code

Jan 19, 2021, 4:07 PM

right, so i can see the high level language, but i don’t understand what i see

Jan 19, 2021, 4:07 PM

I see that the code is similar to python, most likely it is either a mutan or a serpen, I don't know for sure

Jan 19, 2021, 4:08 PM

oh so it doesn’t have to be solidity? i didn’t even know that

Jan 19, 2021, 4:08 PM

teach materiel

Jan 19, 2021, 4:09 PM

wow i’ve never even heard of Vyper

Jan 19, 2021, 4:11 PM

the virtual machine supports multiple languages, you need to understand how the compiler works, etc. you still have to study and learn

Jan 19, 2021, 4:13 PM

Ok got it, thank you

Are there tools for mapping out structures of related contracts automatically, or i just have to do it all by hand using Etherscan?

I found a website called contract-library that appears to do a more detailed decompiling of that vyper contract

Jan 19, 2021, 4:36 PM

I use bloxy.info but if you find it better let me know

Jan 19, 2021, 4:51 PM

the bloxy info on related contracts etc is super helpful, thank you

turns out Chapter 8 in Mastering Ethereum is about Vyper so just got a good overview there, since it’s free on github

Jan 19, 2021, 5:15 PM

where is this course, what is its name

Jan 19, 2021, 5:22 PM

It was pretty technical and hard at times, but he’s a great teacher

Jan 19, 2021, 5:26 PM

whats the name

Jan 19, 2021, 5:34 PM

I guess i’m not allowed to post links

“Ethereum and Solidity: The Complete Developer’s Guide” by Stephen Grider

Jan 19, 2021, 5:50 PM

thanks

Jan 19, 2021, 7:41 PM

thanks for asking! reminds me maybe i should just take the course again… i dont remember anything from when i took it 2 years ago

Jan 19, 2021, 7:43 PM

hello need some help on a ERC721 store if anyone is interested

assistance in building a store

or just general advice

Jan 19, 2021, 8:30 PM