This is the third part of the Smart Contracts series where issues about smart contracts are broken into small chunks. All the examples were run in my local blockchain using Ethereum’s remix IDE. How does an overflow really occur?
Read More »Exploit Integer Overflow and Underflows in Smart Contracts
Smart contracts are used by Ethereum to handle processed based on transactions. Many companies, banks and crypto enthusiasts use them for selling their services or products. Those contracts are written by developers and some of those contains vulnerabilities. One of those is the Visibility issue.
Read More »Exploit and Remediate Function Visibility Vulnerabilities in Smart Contracts
Everyone’s favorite Burp Suite, recently released their new API for interacting with Burp. The old API aka the “Wiener” API, was there from the release of Burp, but in 2022 the new “Montoya” API came out.
During a web assessment is common to find some outdated JavaScript library. I like to showcase the version of the outdated library in a console print with the URL where it loaded. Below is the list of console commands, to get their versions.
Read More »How to print the version of JavaScript libraries in console
Crypto wallets use BIP39 mnemonic in order to help people memorize their key, without having to write long almost random looking strings. Those are presented to users when they create their first wallet and contain a list of 12 to 24 random words.
Read More »Are 24 words strong enough to protect your valuable crypto assets?
Gas is a fee mechanism implemented by Ethereum to help with transactions. This fee is a fraction of the transaction presented in Wei, which is 10-12 of an Ether. Total fee price depends on the size of the smart contract and its functionality.
Read More »How to Save Gas in your Ethereum Smart Contracts
I was working on my website and while everything was running smoothly on my Docker instances, suddenly the newly deployed Docker images were returning errors.
Read More »How to Fix a Broken Flask Application after SQLAlchemy Update
The last few years, more and more scam sellers, sell Windows 10 license for 2€. But are those licenses valid and why do the cost 1/100th of a Windows 10 license from Microsoft? How can you activate your Windows for free?
Read More »Activate Windows 10 For Free
People who work on IT know the struggle of waiting for something to finish, either this is a scan or a download or anything. You don’t want to change tabs every 2 minutes and check the process, you want to know when something is done, and Mac OS offers wonderful alerts.
Read More »Display Notifications from Terminal on Mac OS
When VS code was released I switched almost immediately from Atom, mainly because it was so much lighter and faster, although both editors are based on Electron aka Heavy File Browser. VS Code not only is the best editor out there, but has a plethora of features without any extension which are not so commonly used and here I am to help you make your life a bit better.
Read More »10 Built In Features of VS Code You Need to Know