GoEthereum

go ethereum (geth) is a blockchain node infrastructure

1. install last version and check periodically (no auto-update, manually requiered):

https://geth.ethereum.org/docs/install-and-build/installing-geth

1.1 edit and add path to geth to $PATH to ~/.profile

nano ~/.profile //add line export PATH="/path/to/geth:$PATH"

save file and then execute . ~/.profile

... OR ...

LINUX/UBUNTU USERS:

You can also install geth directly:

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

2. INIT BLOCKCHAIN NODE FOR PUBLIC BLOCKCHAIN ONLY:

2.1 run for first time to sync node

geth

-if run alone attems at first a fast sync, if abruptly interrupt, restarts as full sync (can take a week) and exist the light sync for tests

2.2 after sync you can attach to the JavaScript RCP interface to interact with the node

//Path appears in the logs of the first sync, with the "chinID" (reserved: 1 for mainnet, 2 and 3 for test network) geth attach ipc:/path/to/geth.ipc

~/.ethereum dir has the blocks in "chaindata" dir and the private keys in "keystore" dir

3. INIT BLOCKCHAIN NODE FOR PRIVATE BLOCKCHAIN:

3.1 create an empty rootDir, and inside it, create a dir called "chaindata"

3.2 create genesis.json file (one in the repo)

3.3 create private blockchain

geth --datadir=./chaindata init ./genesis.json

4. start geth node RCP interface and identify IPC endpoint opened url=/... in logs:

geth --datadir=./chaindata --nodiscover

or start irt mining from first account, it will ask next for the password offirst account (0)

geth --datadir=./chaindata --nodiscover --unlock 0 --mine 1

5. attach to the JavaScript RCP interface to interact with the node

//Path appears in the logs of the first sync, with the "chinID" (reserved: 1 for mainnet, 2 and 3 for test network)

geth attach ipc:/path/to/geth.ipc

---

commands inside

get accounts

eth.accounts

create accounts (creates a private keuy inside ~/.ethereum/keystore or ./chaindata/keystore public an private respectively)

personal.newAccount()

account where mined ethh will go

eth.coinbase

the miner coinbase account could be configure like this

miner.setEtherbase(eth.accounts[0])

start mining. the parameter is the number of threads i.e 1

miner.start(1)

get acount's balance in wei

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

... and in eth

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