Geth

Installation

To install geth,

brew update
brew upgrade
brew tap ethereum/ethereum
brew install ethereum

Now, you have installed (evm, geth, abigen, clef, bootnode etc.) tools with it.

which abigen
which evm
which bootnode
which geth
which clef

Create a new account using geth,

geth --datadir ./data-dev account new

Start geth in dev mode,

First store your password in a secret.txt file. It's the same password which you used when creating a new account using geth.

geth --datadir ./data-dev --dev --password secret.txt

Now, a local blockchain started in your computer in dev mode.

You can find the pipe in the logs to interact with it with a .ipc extension.

It should be in your datadir. In this example, it is is ./data-dev/geth.ipc

Attach geth in another terminal window to interact with the blockchain.

geth attach <ipc-file-path>

To list all functions that you can use,

eth

It will print all the functions available to interact with it.

Few examples to interact with it,

eth.accounts
eth.chainId()
eth.getBalance(eth.accounts[0])
eth.sendTransaction({from: eth.account[0], to: eth.account[1], value: web3.toWei(1.0)})

If you don't have multiple accounts, you can create them using

geth --datadir ./data-dev account new

To stop it, just do ctrl-c

Let's use another data dir for this one.

To run geth on sepolia testchain,

geth --datadir ./data-sepolia --sepolia --http  -http.api eth,net,web3,admin