EthereumWorkshop

Understand Solidity

1. Variables and Types
2. Solidity Events
3. Function Modifiers
4. Mappings and Structs
5. Inheritance & Deployment

Deploy Simple Voting

• Copy content of file Smart contarct/SimpleVoting.sol
• Open remix ide at https://remix.ethereum.org
• New file and put the code from first step (Smart contarct/SimpleVoting.sol)
• Click run
• Expand deploy panel
• candidateNames = ["Liverpool", "Manchester United", "Manchester City", "Arsenal"]
• transact
• Done!

Run Simple Voting

• We need webserver to run our DApp so we have 2 simple solutions here.

First solution - Chrome extension

• Install chrome extesion https://chrome.google.com/webstore/detail/web-server-for-chrome/ofhbbkphhbklhfoeikjpcbhemlocgigb?hl=en
• Open
• Choose folder
• Select "DApp"
• Open http://127.0.0.1:8887 (open the link on web server url)
• Click "SimpleVoting.html"

Second solution - use python

• cd DApp/
• run: python -m SimpleHTTPServer 8080
• Open http://localhost:8080
• Click "SimpleVoting.html"

Third solution - use docker

#!/bin/sh
set -x
docker rm -f simplevote
docker run --name simplevote -p 8080:80 -v $PWD/DApp:/usr/share/nginx/html:ro -d nginx:alpine
set +x
echo "Go to http://localhost:8080/SimpleVoting.html"

Live demo here

• https://dev.kulap.io/workshop/smartcontract/simplevote/SimpleVoting.html

Deploy your own ERC-20 token

• Copy content of file Smart contarct/ERC20Token.sol
• Open remix ide at https://remix.ethereum.org
• New file and put the code from first step (Smart contarct/ERC20Token.sol)
• Click run
• Choose ERC20Token
• Expand deploy panel
• _name = YOUR_COIN_NAME
• _symbol = YOUR_COIN_SHORTNAME
• _decimals = 2
• transact
• Done!