Blockchain for beginners:build certificate registration DApp Course

What we cover

• We briefly cover the philosophy of the blockchain and Ethereum.
• Then we will explain how blockchains work, what is Decentralized App and how smart contract communicates with DApp
• We set up an easy development environment, including tools that can be used with minimum steps
• And the biggest part of the course is dedicated to guiding you through a simple Decentralized App

Some of the keyword definition:

Decentralized applications (dApps) are applications that run on the blockchain rather than a database.

We covered the following concept:

• Ethereum
• Account
• Gas
• Smart Contract
• Decentralized App
• Blockchain
• Bitcoin
• Solidity
• Web3.js
• Ropsten Testnet

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What tools and libraries are used?

• Ethereum
• The Metamask Chrome extension
• The Solidity smart contract language (0.5.0)
• The Web3.js(Web3 1.0.0)
• The Ganache Ethereum node emulator
• Github
• Visual Studio Code (text editor)
• The Ropsten test network

All our codes are stored in Github and the solidity code will be stored as .sol file.

• Lesson 2 unit 1: @hashcademy-> choose certificate_dapp -> choose branch master
• Lesson 2 unit 2: @hashcademy-> choose certificate_dapp -> before modify javascript:  choose branch 1a, after modify javascript: choose branch 2
• The Lesson 2 unit 3: @hashcademy-> choose certificate_dapp -> choose branch 3
• Lesson 2 unit 4: @hashcademy-> choose certificate_dapp -> choose branch 4
• Lesson 2 unit 5: @hashcademy-> choose certificate_dapp -> choose branch 5