Blockchain on Time Friend

Develop Your Ethereum Dapp with Eggjs(koa) & web3.js

Wed, 10 Oct 2018 19:33:33 +0000

Eggjs

Eggjs is Alibaba’s open source enterprise-level Node.js framework based on Koa2. eggjs is basically out-of-the-box, follows “Convention over Configuration”. In daily development, very smooth to use. And ecosystem is also relatively complete, koa2 plugins can all be integrated into framework.

Egg.js Directory Structure

egg-project
├── package.json
├── app.js (optional)
├── agent.js (optional)
├── app
|| ├── router.js
│ ├── controller
│ | └── home.js
│ ├── service (optional)
│ | └── user.js
│ ├── middleware (optional)
│ | └── response_time.js
│ ├── schedule (optional)
│ | └── my_task.js
│ ├── public (optional)
│ | └── reset.css
│ ├── view (optional)
│ | └── home.tpl
│ └── extend (optional)
│ ├── helper.js (optional)
│ ├── request.js (optional)
│ ├── response.js (optional)
│ ├── context.js (optional)
│ ├── application.js (optional)
│ └── agent.js (optional)
├── config
|| ├── plugin.js
|| ├── config.default.js
│ ├── config.prod.js
|| ├── config.test.js (optional)
|| ├── config.local.js (optional)
|| └── config.unittest.js (optional)
└── test
 ├── middleware
 | └── response_time.test.js
 └── controller
 └── home.test.js

As above, directories agreed by framework:

Ethereum Development - Build Pet Shop

Sat, 21 Apr 2018 19:33:33 +0000

Truffle’s pet shop is a very good example to understand Ethereum development. Following official provided demo and tutorial, can completely experience entire development process.

Ganache

For environment needs, and quickly set up a private chain environment locally. truffle launched a visual private chain client: Ganache Download Address After downloading and running, you’ll see an interface like this:

Initialize Your Project

First we create a new directory, and initialize the project

$ mkdir pet-shop
$ cd pet-shop
$ truffle unbox pet-shop

Project Directory Structure

Here only lists important directories and files

Ethereum Development - Solidity Beginner Editor -- remix-ide

Fri, 20 Apr 2018 19:33:33 +0000

In Ethereum application development, smart contract development is unavoidable. Currently, remix-ide I found is the most beginner-friendly development tool. Doesn’t need any other environment, can directly deploy and debug. If I find more friendly ones, I’ll recommend in future blogs.

Installation

remix is just an ordinary npm package

$ npm i remix-ide -g

Startup

$ remix-ide

Default will start local port 8080, open browser http://localhost:8080

Usage

First we need to check auto compile

Ethereum Development - Starting with the Truffle Scaffold

Thu, 19 Apr 2018 19:33:33 +0000

I started learning blockchain development this week to build up some knowledge before the company’s blockchain project begins. This blog post is a review of what I’ve learned.

What is Truffle

Truffle is a development framework for the Solidity language on Ethereum. It is implemented in JavaScript. Although it’s built with JavaScript, which we’re familiar with, Truffle is mainly a tool for compiling and deploying smart contracts (though it does have other features).