solidity-project

Project description

Enrollment system for online courses, where you can see the course offer and apply for a course and pay with Ethers. Also the system can emit certifications when the course conditions are accomplished.

The course creation and certification issuer is a specific address in the Ethereum blockchain. The users can apply in the system by them self and pay the fee for the course enrollment with a Ethereum account.

This project can be usefull for an online course system mangamentm like coursera, udemy and others.

User histories:

UserHistory1: As a System administrator can create courses specifying parameters like:

• Course_name
• Course_id
• Total_hours
• Teacher (Etehereum Address)
• Price
• Start_date
• End_date The system verify de address with the admin address for validate the course creation.

UserHistory2: As a user can look the course lisk and select the course and enroll to the course, acepting the conditions and registering the follow information:

• FisrtName
• Lastname
• email
• Phonenumber The user can pay with ether the enrollment process to the course and can receive a mail with the confirmation.

The first project version include

Create courses and enrrol students using Ethereum smartcontracts and web3.js in a http aplication server.

Installing instructions

Be sure that nvm, node and npm ares installed

For this project this package are required

NPM Truffle Framework NodeJS Ganache-CLI Metamask VueJs

wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash
exec $SHELL (Or close and open again the terminal)
command -v nvm
nvm install node
exec $SHELL
command -v npm
npm i -g truffle ganache-cli

Create the project folder.

mkdir ~/blockchain/certifier
cd ~/blockchain/certifier
truffle init

Injecting the front end framework to the project

First, we must install the VueJS command line utility as global dependency.

npm i -g @vue/cli

Then we go a level above to install the frontend.

cd ..
vue create certifier

Then we must answer a couple of questions the cli prompts

1. Target directory? → Merge
2. Picking presets → Manually
3. You must use whatever you want, but the recommendation is → Babel, Router, Vuex, CSS Preprocessors
4. Use of history mode → Yes
5. CSS - Pre-processors → SASS/SCSS
6. Prefered places for presets → Dedicated config files
7. Saving presets → As you wish

Then, back inside the project we must install once again chai.

npm i -D chai

To establish the connection to the local blockchain we ran the following command.

ganache-cli

And then we modified the file, in order to let truffle how to got a connection to the local blockchain:

truffle.js

Then copy all the files from the github repository to the certifier folder

/blockchain/certifier

Compile and migrate de contracts

truffle compile
Truffle migrate

And then run de dapp

need go to the certifier folder 

npm run serve

Then go to http://localhost:8080 for interact with the app