Jeremy P

I help small businesses develop successful web3 products. Smart Contracts | Integration | Beautiful Websites. Learn more ⬇️

[Jeremy P @JeremyTheWizard]

@piros_eth True
Those who can do both are unstoppable

[Jeremy P @JeremyTheWizard]

@liamherbst_ Freedom of information is essential

Decentralized social media will play a key role in this purpose

[Jeremy P @JeremyTheWizard]

Only 19 more spots 👀

Become a beta user

[Peace @yourpeace_io]

News Alert 🚨‼️ Buscamos Beta Users.👩🏼‍🚀🔥🔥🔥

[Jeremy P @JeremyTheWizard]

#Solidity Trick for Gas Optimization:

Since version 0.8.0, Solidity automatically checks for overflow in each arithmetic operation, making them naturally more expensive

If you are sure a variable will never overflow (Ex: a loop), use the unchecked block to save gas

[Jeremy P @JeremyTheWizard]

Those who now laugh at us #web3 builders and collectors will say we got lucky in 10 years

[Jeremy P @JeremyTheWizard]

One of the best ways to improve your coding skills is to refactor your code

[Jeremy P @JeremyTheWizard]

If you can't explain what your startup does in 10 words, you don't know what is your main value proposition.

[Jeremy P @JeremyTheWizard]

@piros_eth Agree
When there are no distractions it becomes so easy doing what you have to do

[Jeremy P @JeremyTheWizard]

@edanbenatar So True. Look to get paid by the results you get, not by the clock

[Jeremy P @JeremyTheWizard]

Fast Coding or Clean Coding?

Clean code is good but sometimes you might be in a rush or you just need to test something quickly

In my experience, it's both

When you are in a rush create a semi-readable working code

Then, when it's suitable, improve it

What do you think?

[Jeremy P @JeremyTheWizard]

Programming is for people who handle success and failure... every 3 hours. Nonstop

[Jeremy P @JeremyTheWizard]

Developers., please comment on your code...
but not like this "return 1; # returns 1"

[Jeremy P @JeremyTheWizard]

That's why it's called a re-entrancy attack

Stay tuned to know how to protect against these hacks.
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[Jeremy P @JeremyTheWizard]

What do all these hacks have in common?

- The DAO: $50mln
- Fei Protocol: $80mln
- Cream Finance: $18.8ml
- Uniswap/Lendf.Me: 25$mln
- The list can go on forever...

All these hacks were re-entrancy attacks!

So what is a re-entrancy attack? Read below for a short overview

[Jeremy P @JeremyTheWizard]

What do all these hacks have in common?

- The DAO: $50mln
- Fei Protocol: $80mln
- Cream Finance: $18.8ml
- Uniswap/Lendf.Me: 25$mln
- The list can go on forever...

All these hacks were re-entrancy attacks!

So what is a re-entrancy attack? Read below for a short overview

[Jeremy P @JeremyTheWizard]

The external contract then usually calls back the main contract.

Doing so never allows the code after the line where the exploiter contract was called to be run.

You can imagine all the problems that could cause.

[Jeremy P @JeremyTheWizard]

If You Want to Kill a Big Dream, Tell It to Small-Minded People!

[Jeremy P @JeremyTheWizard]

Solidity Gas Optimization Trick:

Each slot can store up to 256 bits
Data that is bigger spans multiple slots
For data smaller than a slot, solidity tries to stack it together
But here's the catch...

For this to work, we have to put the same type of variables together

[Jeremy P @JeremyTheWizard]

@slushygmi is it saturday already?