DeFi Sandwich Attacks

A common attack in DeFi (as well as in traditional finance) is the sandwich attack. Upon observing a trade of asset X for asset Y, an attacker frontruns the victim trade by also buying asset Y, lets the victim execute the trade, and then backruns (executes after) the victim by…

Capture The Ether Solutions

Capture the Ether is a game to learn about Ethereum smart contract security. It already launched over 2 years ago but most things you’ll learn still apply today. There even is a leaderboard. You still have the chance to be immortalized as one of the first 100 players to solve all…

Ethernaut Solutions

Ethernaut is OpenZeppelin’s wargame to learn about Ethereum smart contract security. It launched a couple of years ago and consists of 21 challenges that need to be solved. I personally found the Ethernaut challenges to be easier than the challenges of Capture the Ether, another…

Damn Vulnerable DeFi Solutions

DeFi protocols come with novel innovations that haven’t been possible in traditional finance like flash loans. This opens new attack vectors that need to be considered when designing these protocols. Recently, OpenZeppelin released their Damn Vulnerable DeFi CTF challenges. They…

Goals 2021

Following the tradition of 2018, 2019 and 2020, I’ll revisit my previous year’s goals and see what I achieved, and set new goals for 2021. Reviewing 2020’s goals Get back to a bi-weekly blog-post consistency. ❌  Failed, I only wrote 15 out of the desired 26 posts (not counting…

Progress Report - December 2020

Pricing LP tokens | Warp Finance hack

Progress Report - November 2020

Progress Report - October 2020

How I gamed EOS Defi projects and still got rekt

Progress Report - September 2020

How to install an old package version with brew

Fixing C++ compilation bugs for the MacOS Catalina upgrade

Progress Report - August 2020

Progress Report - July 2020

Obfuscating EOSIO smart contracts

Progress Report - June 2020

Progress Report - May 2020

Typing transformations in TypeScript

Progress Report - April 2020

8 EOSIO WASM intrinsics you might not have heard about

EOSIO C++ IntelliSense in VSCode

Implementing efficient Dividend tokens

Testing EOSIO smart contracts with Hydra

Progress Report - March 2020

Progress Report - February 2020

How to check if an EOS account has a smart contract

Launching EOS Token Portfolio

How to deploy a create-react-app with github-actions

Progress Report - January 2020

How to rollback to an older EOSIO.CDT version with brew

Goals 2020

Progress Report - December 2019

De-anonymizing eosblender.com

EOSIO - How to pay for users' CPU

EOSIO Dev Puzzle - What's the max amount of RAM that can possibly be consumed by storing a single uint64

Progress Report - November 2019

Earn on your unused CPU and help the EOS network!

Progress Report - October 2019

Progress Report - September 2019

What really happened during the EOSPlay hack

Progress Report - August 2019

Progress Report - July 2019

How to fetch any secondary EOSIO table index using eosjs

Progress Report - June 2019

Advanced EOSIO programming concepts

Progress Report - May 2019

How EOS code and ABI hashes are computed

Progress Report - April 2019

Blog redesign with Gatsby and TailwindCSS

Progress Report - March 2019

How to create beautiful epub programming ebooks

Progress Report - February 2019

Progress Report - January 2019

How to write pandoc plugins in Nodejs

Goals for 2019

Progress Report - December 2018

Deferred Transactions on EOS

Difference Boolean Constructor and Double Negation

Progress Report - November 2018

Deploying EOS contracts using EOS.js

Progress Report - October 2018 - No more mobile apps 😬

EOS 1.3 Contract Development Toolkit Updates

C++ Guide for EOS Development - Header files

C++ Guide for EOS Development - Multi-Index Container

Progress Report - September 2018

C++ Guide for EOS Development - Iterators & Lambda Expressions

C++ Guide for EOS Development - Templates

C++ Guide for EOS Development - Classes and Structs

Progress Report - August 2018

C++ Guide for EOS Development - Call by value / reference

C++ Guide for EOS Development - Basics

Learnings from building my first dapp on EOS blockchain

Progress Report - July 2018

Introducing King of EOS 🥁

Bugs in V8's Exponentiation Operator

Progress Report - June 2018

Building a landing page in Vue.js

React just got ugly - React 16.4 Update

Progress Report - May 2018

Async / Await - Return values

React - Fun with keys

Progress Report - April 2018

You might not need React Context

Importing Blender 3D Model with Texture to Three.js

Progress Report - March 2018

Lazy-loading images with React and Semantic UI

Thoughts on making EOS development easier

Progress Report - February 2018

How to access Google Spreadsheets with Node

Differences in Defining ES6 Class Methods

Creating a Remind-Me bot for Steem

Progress Report - January 2018

Splitting your app into micro-processes

Book Review - Attack of the 50 Foot Blockchain

How does Steem work, anyway?

Goals for 2018

Progress Report - December 2017

How to cross-post to Steem

How to cross-post to Medium

Progress Report - November 2017

Released my fifth React Native app

Trying DynamoDB for the first time

Progress Report - October 2017

Progress Report - September 2017

Headless Chrome in Node.js

Progress Report - August 2017

Progress Report - July 2017

React Native CodePush Cheat Sheet

Progress Report - June 2017

Progress Report - May 2017

Lightweight Progress Circles in React Native

Progress Report - April 2017

Book Summary - Clean Code

Progress Report - March 2017

Getting Song Lyrics in Node.js

Creating Dynamic Promise chains

Progress Report - February 2017

Google Drive in React Native

JavaScript void Keyword

Progress Report - January 2017

How to use D3.js in React

Playing around with Relay and GraphQL

Book Summary - Heard On The Street - Quantitative Questions from Wall Street Job Interviews

Creating Google AdSense Reports with Express

Progress Report - December 2016

Book Summary - On Writing Well

How is async/await transpiled to ES5

How are generators transpiled to ES5

Released my fourth React Native app

Styling TimePickerAndroid in React Native

Structuring Redux Selectors

How to set appParams in React-Native

Progress Report - November 2016

Book Summary - Team Geek

How to create a React Native Android Library

Ultimate Guide to non-working CSS margins

How to use React in Markdown

How to migrate from Wordpress to Phenomic

Moving from WordPress to a Static Site Generator

Publishing React Native App on Android

What I learned from building my first React Native App

Set React Native App Icon When Minimized

Charts in React Native with React-Native-SVG and D3.js

How to add Permissions in React Native

How to Get The Size of a React Native View Dynamically

Performance Optimizations in Redux' mapStateToProps

How to create a Pull Request on GitHub

Why you should not use mapStateToProps too often

Modifying a Leaf of the Redux State Tree

Styling DatePickerAndroid in React Native

How to create a More-Popup Menu in React-Native

Better JS Logger for Debugging

Limitations of the react-native JS engine

Enumerating a Grid in Spiral Order

Using Actions in Redux the Correct Way

Drawing Fractals with L-Systems in D3.js

Moving Wordpress to a different domain

Javascript ES6 + Babel.js + Grunt with Sublime Text

Howto Raytracer: Ray / Triangle Intersection Theory

Howto Raytracer: Ray / Plane Intersection Theory

Howto Raytracer: Ray / Sphere Intersection Theory

Creating seamless textures the easy way

Understanding front faces - winding order and normals