While developing Ethereum dApps, it is common to run into an issue where a local blockchain such as geth or ganache (test-rpc) didn’t shut down gracefully. This can cause the dreaded EADDRINUSE error: Ganache CLI v6.2.5 (ganache-core: 2.3.3) listen EADDRINUSE: address already in use 127.0.0.1:8545 To find the process using this port, lsof is a great tool. Type: lsof -i :8545 This will give you a list of all of the programs using that port. An example output:

Testing Bold Claims For Boulder Blockchain’s last meetup of 2018, we decided to hold a party where crypto was the only accepted payment for beers. Cryptocurrency’s usefulness has long been projected into the future. …

Why I believe in the future of crypto, and what I’m doing about it — I started 2018 by leaving my cushy job to finally pursue my goal of going all-in on crypto. So far, it’s going greater than I could have expected, and I feel like I finally found my tribe. …

How to avoid falling for simple Ethereum scams — Intro Ethereum is in the earliest stages of usability at the moment. Transaction costs are high, the network is subject to DDOS by kitty cats, and most tools have abysmal UIs. One of the biggest risks to the future of the protocol however, is the ease of pulling off scams. One…

This is a tutorial for installing NixOS for people who normally use Windows 10, but want an option to use NixOS on the same system. This tutorial intends to give a more beginner friendly view on the installation process than what is currently available. In order to keep things simple…

A common issue in developing dApps is detecting which account within Metamask a user plans on using. At the time of this writing, even Metamask suggests you poll every 100 milliseconds. (Eww) //Not a fun pattern to have to use var account = web3.eth.accounts[0]; var accountInterval = setInterval(function() { if…

Dealing with the XML-RPC / pingback DDOS attack — If you have a Wordpress blog, there is a decent chance you are unknowingly DDOSing people. What is DDOSing? DDOS stands for Distributed Denial of Service, and is used as a way of shutting down a certain website or service being hosted on the internet. Normally this is done when someone controlling a…

The Backstory In December of 2015, my parents bought me some herb plants as a Christmas gift. This sparked a new consistent hobby of mine of raising a container garden in my urban apartment’s balcony. This series of blog posts will catalogue the progress for those interested. Unfortunately I don’t have pictures…

The birth of vapecasa.io — Ideas are shit, execution is everything. In college, my mind was always seemed to be bursting with idea after grandiose idea, yet I never was able to build anything of substance. So, as a young bright eyed and bushy tailed new-grad, I headed off to San Francisco with one major…