Steps from scratch for creating and deploying a HelloWorld contract on testrpc and Rinkeby testnet. Video at https://www.youtube.com/watch?v=nqw4FeYQBxc.

Download geth at https://geth.ethereum.org/downloads/

Once geth is downloaded, begin syncing the Rinkeby blockchain by opening a new terminal window and running geth --rinkeby --fast

Download truffle npm install -g truffle

mkdir HelloWorld && cd HelloWorld

truffle init

cd contracts/
rm ConvertLib.sol && rm MetaCoin.sol
cd ..
cd migrations/
rm 2_deploy_contracts.js
cd ..
cd test/
rm TestMetacoin.sol && rm metacoin.js
cd ..

truffle create contract HelloWorld

See contracts/HelloWorld for code.

truffle create migration deploy_hello_world

There is a bug with the above command that will cause your contract to fail migration. Change the name of migration.js to the created directory name. In this case it is 1502019599_deploy_hello_world.js. Place the file in the migrations directory and delete the directory that was created automatically. Please see /migrations to see structure.

Current release is 3.4.5. The pull request for fix this issue will be deployed in the next release of truffle.

See migrations/1502019599_deploy_hello_world.js for code.

In terminal window downloading Rinkeby blockchain, ctrl+C to exit.

testrpc

Navigate to original terminal window

truffle compile
truffle migrate --reset
truffle console

Create instance of contract for easy use HelloWorld.deployed().then(function(instance) { contract = instance })

Check initial message contract.getMessage.call()

Set new message contract.setMessage("Welcome to TBBD!")

Check new message contract.getMessage.call()

Exit testrpc ctrl+C

Run geth on rinkeby again but with additional commands geth --rinkeby --rpc --rpcapi web3,db,personal,eth,net

Retrieve ipc filepath from rinkeby startup information Will look like INFO [08-06|08:06:14] IPC endpoint opened: <path>

Open a new terminal window geth attach ipc:<path>

Create new account personal.newAccount("passphrase")

Retrieve account address eth.accounts[0]

Create public gist at https://gist.github.com/ Paste address in gist and click Create public gist Navigate to https://faucet.rinkeby.io/ and paste in gist URL Click Give me ether and wait 15-30 seconds to receive ether

Check balance in geth eth.getBalance(eth.accounts[0])

Configure truffle.js for rinkeby testnet See truffle.js for configuration code.

Get account address eth.accounts[0]

Unlock account in geth console personal.unlockAccount(<address>)

Deploy to rinkeby testnet truffle migrate --network rinkeby

Wait about 1 minute to get final HelloWorld contract address Search for deployed contract at https://rinkeby.etherscan.io with address

Get contract abi by navigating to https://ethereum.github.io/browser-solidity/ Copy paste contract code On the right click contract details and copy the interface JSON

Navigate to geth console again

abi = <interface JSON>
contract = eth.contract(abi)
instance = contract.at("address")

Check deployed message instance.getMessage.call()

Unlock account personal.unlockAccount("<address>")

Change message instance.setMessage("Welcome to TBBD!", {from: eth.accounts[0]})

Wait 15-30 seconds for transaction to get mined Check deployed message instance.getMessage.call()