How to Deploy a Crowdsale Initial Coin Offering (ICO) to your own Private Testnet

We've been trying to deploy a Crowdsale Initial Coin Offering (ICO) Solidity contract to the Ethereum block chain for the better part of 2 months. Code for an Initial Coin Offering Fund raise We've looked into the Open Zeppelins tutorials on How to Create Token an Initial Coin Offering using Truffle and Open [...]

By |2019-09-25T01:42:24+00:00September 27th, 2017|Ethereum, Ethereum Apps, Uncategorized|0 Comments

Ethereum Truffle Pet Shop DApp running on an Amazon EC2 Instance

In this tutorial, we're going to deploy the Ethereum Truffle Pet Shop DApp demo to an AWS EC2 Micro instance. If you've played with Ethereum's Solidity programming language to deploy smart contracts to the blockchain, you've come to the realization that Ethereum and Solidity are desperately in need of a development framework. Truffle is the [...]

By |2019-09-25T01:42:26+00:00August 24th, 2017|AWS App Development, Ethereum Apps|4 Comments

Successful Health Apps Part 2: User-Centered Design

  Here is the second part of our blog series on building a successful healthcare application for web or mobile. This post focuses on utilizing ‘user-centered design’ methodologies to enhance the usability and usefulness of your app. But firstly, what is ‘user-centered design’? User-centered design (UCD) or user-driven development (UDD) is a rigorous, user-focused methodology [...]

By |2019-09-25T01:42:29+00:00August 3rd, 2017|Healthcare Mobile Apps, Mobile App Design|0 Comments

Technical Analysis of the $31 Million Dollar Ethereum Hack

Here's an interesting analysis of the $31 Million Ethereum Hack. https://medium.freecodecamp.org/a-hacker-stole-31m-of-ether-how-it-happened-and-what-it-means-for-ethereum-9e5dc29e33ce From a technical standpoint, it appears as though the software developers who built the Parity wallet put in a catch all function that enables unknown functions that are payable, that send you Ether, to default to depositing the Ether. function() payable { [...]

By |2019-09-25T01:42:31+00:00July 22nd, 2017|Ethereum|0 Comments

How to Serve Up Web Content from Ethereum – Part 4 – Ethereum Mining on TestNet

This tutorial is part of a series of blog posts on getting a web page on your web server to communicate via web3 with your Ethereum test network on localhost. In our previous post, we created the first block in our testnet using a CustomGenesis.json. In the CustomGenesis.json, we set the difficulty attribute to a very low [...]

By |2019-09-25T01:42:33+00:00July 21st, 2017|Ethereum, Ethereum Apps|0 Comments

How to Serve Up Web Content from Ethereum – Part 3 – Setting Up Your Own Private Testnet with a Genesis Block

This tutorial is part of a series of blog posts on getting a web page on your web server to communicate via web3 with your Ethereum test network on localhost. In our previous post, we installed Geth on Mac OS X. When Geth is initially started on a Mac, Geth will start to synch with the production [...]

By |2019-09-25T01:42:36+00:00July 20th, 2017|Ethereum, Ethereum Apps|0 Comments

How to Serve Up Web Content from Ethereum – Part 2 – Download Geth on Mac OS X

This tutorial is part of a series of blog posts on getting a web page on your web server to communicate via web3 with your Ethereum on localhost. In our previous post, we installed the Ethereum Wallet. The Ethereum Wallet is a nice way to visualize what's going on with Ethereum, but for our purposes initially we [...]

By |2019-09-25T01:42:39+00:00July 13th, 2017|Ethereum, Ethereum Apps|0 Comments

Setting up your Ethereum Eth Environment on a Mac OS X

Setting up your Ethereum Eth Development Environment on a Mac OS X Firstly, to install Ethereum Eth download the latest stable binary of cpp-ethereum, and install on your chosen operating system. I'm running on Mac so I'll install via Homebrew brew update brew upgrade brew tap ethereum/ethereum brew install cpp-ethereum In the installation of cpp-ethereum, [...]

By |2019-09-25T01:42:49+00:00June 27th, 2017|Ethereum, Ethereum Apps|0 Comments