Generate your eth address and private key from mnemonic passphrase

eth_address_generator.rb

require 'bitcoin'
require 'money-tree'
require 'eth'
require 'bip44'
require 'bip_mnemonic'
require 'bip44/utils'
require 'bip44/bitcoin'
require 'bip44/ethereum'
require 'bip44/wallet'

mnemonic = "beyond satoshi" # enter your own 24-word passphrase here
seed = BipMnemonic.to_seed(mnemonic: mnemonic)
@eth_wallet = Bip44::Wallet.from_seed(seed, "m/44'/60")
@eth_node = @eth_wallet.sub_wallet "m/2/0"

priv_key_hex = @eth_node.private_key # key = Eth::Key.new priv:priv_key_hex
eth_address = @eth_node.ethereum_address