Yul & Memory Intro | Yul Exploit!

[@AlecMaly]

Recently got into web3, and your videos have been super helpful. Thanks for sharing!!

[@0xOwenThurm]

Glad they could help!

[@CazandoCrypto]

Wow, that's a lot of knowledge right there! Great yul explanation! Thanks Owen

[@0xOwenThurm]

Glad it could be helpful!!

[@code7631]

Thanks Owen, your content is great. 💙

[@0xOwenThurm]

Of course! Glad it could help!

[@martianacademy]

Great channel have less subscribers, strange

[@aboutikareda1565]

This is exactly what i was looking for. Thanks !

[@0xOwenThurm]

Glad it could help!

[@martianacademy]

Very usefull video,

[@0xOwenThurm]

So glad this could help!

[@nyedisiam]

Great video! Learned a ton! Can you briefly explain why getting all the rewards at once is a "terrible idea"? Other than that you're sending before deleting, I'm not sure why. Thanks!

[@0xOwenThurm]

Absolutely! It's a terrible idea for exactly the reason we looked into. It enables someone to give me a malicious reward that makes it so that I can never withdraw any of my other rewards -- since they must all be withdrawn together.

[@bitedeep4876]

I was following until I wasn't 😂 Particularly the exploit breakdown section This is definitely one I'll be revisiting Thanks again @Owen

[@0xOwenThurm]

Haha glad it could help!!

[@SaurabhBhai-t8k]

Thanks my mentor 🫡

[@0xOwenThurm]

No problem ser!

[@stevekimani.111]

that exploit is genious

[@0xOwenThurm]

It really is

[@lungelopackery5728]

Genius

[@blueshirtguy1829]

add(data,0x20) cause at 0x80 the length of the data stored right..?

[@0xOwenThurm]

Yep!

[@kamalchan9756]

depends on the slot returned by mload(0x40) it could be 0x80 or 0xa0 etc.... not always 0x80 that's why we use free memory pointer

[@nickeast4853]

knowledgeable but cant convey clearly

[@samibouchnafa7809]

mstore(free_memory , 0x08c379a000000000000000000000000000000000000000000000000000000000) mstore(add(free_memory , 4) , 0x20) . Why isn't there any overriting in the 0x80 . The free_memory pointer was never updated So the second line should have overriten the 0x80 word . I don't know what am i missing exactly ?