setup dev

dev_setup.md

Ethereum dev network setup

Getting Started

These instructions will allow you to get a ethereum dev network up and running on your local machine for development and testing purposes.

• Testrpc setup
  
• Ethereum dev network setup
  

Testrpc setup

Install Command

npm install -g ethereumjs-testrpc

Start testrpc command

$ testrpc --port 8545

testrpc: https://github.com/ethereumjs/testrpc

Ethereum dev network setup

• Installing Ethereum client

For Ubuntu

sudo apt-get install software-properties-common
sudo add-apt-repository -y ppa:ethereum/ethereum
sudo apt-get update
sudo apt-get install ethereum

Check version

$ geth version

Other Operating systems: https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum

Steps

1] New chain directory

It will create a directory where all the chain data including wallet keys will be stored.

$ sudo mkdir dev

2] Create new account

This command will create new Ethereum Account keystore at .../dev/keystore/ and store the keys in the keystore directory.

Default directory = /root/.ethereum/keystore/

$ geth --datadir 'dev' account new
Passphrase: xxxxxxxx
Repeat passphrase: xxxxxxxx
Address: {4e6cf0ed2d8bbf1fbbc9f2a100602ceba4bf1319}

Copy the displayed account address

3] Start Ethereum client

This command will start the Ethereum client process.

 $ sudo geth --datadir="dev" --dev  --etherbase="0x0000000000000000000000000000000000000000"  --unlock 0 console  

 -- dev flag - to use the pre-configured settings provided by geth.

-- etherbase flag - set miner account.

--datadir flag - set the location of chain data

--unlock - keep account unlocked for the session. 0 - account [0]

Enter the passphrase to unlock the wallet

4] Start mining

This command will start the miner process.

miner.start()

Check current balance in Wei

web3.eth.getBalance(eth.accounts[0])

Check current balance in Ethers

web3.fromWei(web3.eth.getBalance(eth.accounts[0]),'ether')

5] Connect RPC externally (Not Safe)

This command will allow you to connect your Ethereum client from external device on same network. --rpc start rpc server.This is generally enabled by default in Geth.

--rpcport select rpc port. Default port is 8545

--rpcaddr "0.0.0.0" '(Not Safe)'

--rpccorsdomain specify URLs which can connect to your node in order to perform RPC client tasks '(Not Safe)'

Add to start command

--rpc --rpcaddr "0.0.0.0" --rpcport 8546 --rpccorsdomain "*"  --rpcapi "db,eth,net,web3,personal"

OR

 admin.startRPC("0.0.0.0", 8546, "*", "web3,net,eth")
 admin.stopRPC()

sample:

$ sudo geth --datadir="dev" --dev --rpc --rpcaddr "0.0.0.0" --rpcport 8546 --rpccorsdomain "*"  --etherbase="0x0000000000000000000000000000000000000000"  --nodiscover --unlock 0 console