A simple business card smart contract example (impressed by samples from Ethereum Development Course - Blockchain at Berkeley)

• download and install Node.js
• npm update
• npm install -g truffle
• npm install -g ganache-cli
• download and install Git for Windows (optional - to use Git Bash)

• mkdir cardApp
• cd cardApp
• mkdir card
• cd card
• truffle init
• copy files from this repo to corresponding subfolders of a card folder

• ganache-cli (cmd window)
• truffle compile (now you need to switch to Git Bash)
• truffle migrate
• truffle console
• Card.address
• var card = Card.at(Card.address)
• card
• card.getCard();

• npm install -g create-react-app
• create-react app cardUI
• replace config.json with a file from this repo
• cd cardUI
• npm install
• npm start (you will see an app page in a browser at localhost:3000)
• copy files from this repo to corresponding subfolders of a cardUI folder
• for updating EthereumSetup.js file you'll need a contract address (copy output of card.address comand from truffle console) and ABI (copy output from JSON.stringify(card.abi) from truffle console)
• save project - page in a browser will refreshed. At this point you must see some contact information on that page
• if you want to use plain 'vanilla' JavaScript, navigate to localhost:3000/test.html (youll need to copy contract address and ABI from EthereumSetup.js to this file to get it to work)